HP LaserJet 4000 Service Manual
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- HP LaserJet 4000 | Service Manual - Page 1
HP LaserJet IllSi (HP 33491) and HP LaserJet 4Si (HP C2010A) Combined Service Manual HEWLETT PACKARD HP Part No. C2010-90939 Printed in USA First Edition - February 1993 - HP LaserJet 4000 | Service Manual - Page 2
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for errors contained herein or for incidental consequential damages part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard - HP LaserJet 4000 | Service Manual - Page 3
of Xerox Corporation. NetWare is a registered trademark of Novell Company. About This Manual This manual provides detailed field service information on the Hewlett-Packard LaserJet IIISi and LaserJet 4Si printers. Since both printers are engineered around the same basic "print engine," most of the - HP LaserJet 4000 | Service Manual - Page 4
major printer parts and assemblies are Capitalized. Bold is used for emphasis, particularly in situations where italic type would be confusing. Italic type is used to indicate related documents or for emphasis. COMPUTER type indicates text visible on the printer's display or commands as seen on a PC - HP LaserJet 4000 | Service Manual - Page 5
-Site Warranty Exclusions SERVICE AND REPAIR STRATEGY Level 1: User Maintenance (PM) Level 2: Field Replaceable Units (FRUs) Level 3: MIO Cards DOING BUSINESS WITH HP HP Fax Information Retrieval Support Technology Features and Benefits of HP FIRST To Use HP FIRST Ordering Parts Ordering Consumables - HP LaserJet 4000 | Service Manual - Page 6
Demo Pages (LaserJet 4Si Only) 3-16 4. Maintenance INTRODUCTION 4-1 User Maintenance Concept 4-1 PRINTER CONSUMABLES 4-1 TONER CARTRIDGE LIFE EXPECTANCY . 4-2 VERIFYING PRINTER MAINTENANCE 4-3 USER MAINTENANCE 4-4 Fusing Assembly 4-5 Transfer Roller 4-7 Transfer Roller Replacement - HP LaserJet 4000 | Service Manual - Page 7
Area Antistatic Teeth Transfer Guide Clearing the User Maintenance Message 5. Functional Overview INTRODUCTION IMAGE FORMATION SYSTEM PAPER PICKUP AND FEED SYSTEM BASIC SEQUENCE OF OPERATION Overview Standard Printer Operation Timing Diagram MIO 6. Removal and Replacement INTRODUCTION REQUIRED TOOLS - HP LaserJet 4000 | Service Manual - Page 8
7-2 Talk to the Customer! 7-2 Preliminary Operating Checks 7-3 Pre-Troubleshooting Checklist 7-4 Basic Troubleshooting Flowchart 7-8 PRINTER MESSAGE SUMMARIES 7-9 Clearable Warnings (LaserJet 4Si Only) 7-21 PRINTER MESSAGE DETAILS 7-23 "02 WARMING UP" (continuous) Message 7-23 - HP LaserJet 4000 | Service Manual - Page 9
and Delivery Jams . Duplex Assembly Paper Jams "14 NO TONER CART" Message Drum Sensitivity Switches (SW1002 and SW1003) Functional Check "16 TONER LOW" Message Toner Low Functional Check "41 ERROR" Message "50 SERVICE" Fuser Malfunction "41/51 ERROR" Message "51 ERROR" Message "52 ERROR" Scanner - HP LaserJet 4000 | Service Manual - Page 10
Paper Feed PCA DC Controller PCA AC Driver PCA High Voltage Power Supply PCA Voltage Test Points Formatter Service Configuration Cold Reset Accessing the Error Log Service Mode Accessing the Service Mode Setting Page Count, Maintenance Count, Serial Number Initiating a Chart A Printout (LaserJet - HP LaserJet 4000 | Service Manual - Page 11
the Parts Index 8-2 Ordering Printer Accessories 8-2 COMMON HARDWARE 8-3 PARTS LISTS 8-4 ACCESSORY PARTS 8-38 Duplex Assembly 8-38 Interfaces and LAN Network Cards 8-39 Standard Dual Serial/Centronics MIO 8-40 Recommended Memory 8-41 Authentic Adobe PostScript Level 2 (LaserJet 4Si - HP LaserJet 4000 | Service Manual - Page 12
4Si 05 Self test Printout 3-6. Engine Test Button and Page 3-7. LaserJet 4Si Font Test Pages 3-8. LaserJet 4Si Demo Pages 4-1. Sample 5% Page Coverage 4-2. Location of Printer Maintenance Parts 4-3. Removing the Fusing Assembly Screws 4-4. Removing the Fusing Assembly 4-5. Removing the Transfer - HP LaserJet 4000 | Service Manual - Page 13
(continued) 6-40. Top Cover Assembly 6-41. Top Cover Support Bracket 6-42. Top Cover Assembly (continued) 6-43. Job Offset Assembly 6-44. Job Offset Assembly (continued) 6-5 6-6 6-7 6-8 6-9 6-10 6-11 6-12 6-14 6-16 6-19 6-21 6-21 6-22 6-23 6-24 6-25 6-26 6-27 6-29 6-30 6-31 6-32 6-33 6-35 6-36 6-37 - HP LaserJet 4000 | Service Manual - Page 14
Paper Feed PCA Components 7-59 7-14. DC Controller PCA Components - LaserJet IIISi 7-60 7-15. DC Controller PCA Components - LaserJet 4Si 7-61 7-16. AC Driver PCA Components 7-63 7-17. High Voltage Power Supply PCA Components 7-64 7-18. Formatter Service Configuration 7-66 7-19. Service - HP LaserJet 4000 | Service Manual - Page 15
Components (Figure 3 of 3) 8-9. Control Panel Assembly 8-10. Paper Input Unit (Figure 1 of 2) 8-11. Paper Input Unit (Figure 2 of 2) 8-12. Lifter of 2) 8-18b. Fusing Assembly (2 of 2) 8-19. Cassette Assembly 8-20. Paper Refeed Assembly 8-21. Fan Assembly (FM2) 8-22. Hinge Assembly 8-23. Right - HP LaserJet 4000 | Service Manual - Page 16
"UC/LC LOAD" Message Checks 7-25 7-5. Configuration of Tray Size Sensing Switches 7-26 7-6. "12 PRINTER OPEN" Checks 7-27 7-7. "14 NO TONER CART" Checks 7-36 7-8. "16 TONER LOW" Checks 7-38 7-9. "50 SERVICE" Fuser Malfunction Checks . 7-41 7-10. "51 ERROR" Beam Detect Checks 7-43 7-11 - HP LaserJet 4000 | Service Manual - Page 17
Fusing 7-32. Distorted Print 7-33. Black Pages with Horizontal Pages 7-41. High Voltage Power Supply Assembly Summary 7-42. High Voltage System Checks 7-43. Communications Checks 7-44. Duplex Paper Jam Troubleshooting Control Panel Assembly 8-10. Paper Input Unit (1 of 2) 8-11. Paper Input Unit (2 - HP LaserJet 4000 | Service Manual - Page 18
Assembly 8-24. Left Main Block Assembly 8-25. Duplex Unit Assembly 8-26. LaserJet LIISi Supported MIO Configurations 8-27. LaserJet 4Si Supported MIO Configurations . 8-28. Recommended Memory 8-29. Miscellaneous Accessories 8-31 8-32 8-33 8-34 8-35 8-36 8-37 8-38 8-39 8-39 8-41 8-43 Contents-14 - HP LaserJet 4000 | Service Manual - Page 19
-Site Warranty Exclusions SERVICE AND REPAIR STRATEGY Level 1: User Maintenance (PM) Level 2: Field Replaceable Units (FRUs) Level 3: MIO Cards DOING BUSINESS WITH HP HP Fax Information Retrieval Support Technology Features and Benefits of HP FIRST To Use HP FIRST Ordering Parts Ordering Consumables - HP LaserJet 4000 | Service Manual - Page 20
IIISi Model & Serial Number Label 1-3 1-2. LaserJet 4Si Label Locations 1-4 1-3. LaserJet 4Si Model Number Label 1-5 1-4. Sample Laser Safety Label 1-9 Tables 1-1. Physical Dimensions 1-6 1-2. Line Voltages/Frequencies 1-6 1-3. Power Consumption While Printing 1-6 1-4. Operating - HP LaserJet 4000 | Service Manual - Page 21
Job Offset supports separation of multiple print jobs. ■ Two font cartridge slots. ■ 2 Mbyte of base RAM memory (LaserJet 111Si=1 Mbyte) with optional SIMM memory upgrades. ■ A maximum duty cycle of 75,000 pages-per-month (LaserJet IIISi = 50,000). ■ 200,000 page User Maintenance kit. I Print speed - HP LaserJet 4000 | Service Manual - Page 22
Optional Features ■ Add up to 32 Mbytes of additional expansion memory (16 Mb maximum on LaserJet IIISi). ■ PostScript® (LaserJet IIISi = level 1, LaserJet 4Si = level 2) to provide PostScript language operation. ■ Duplex Unit to print on both sides of the page. ■ Direct-connect interfaces for - HP LaserJet 4000 | Service Manual - Page 23
IDENTIFICATION LaserJet IllSi The model number is on a label placed on the outside Right Rear Cover of the printer, above the power cord outlet. The model number is an alphanumeric such as 33491A or 33491AB, and is found at the top of the label. - HP LaserJet 4000 | Service Manual - Page 24
(see Figure 1-2, callout 1). The model number is found at the top of the label. Model number C2009A is the base number for all LaserJet 4Si printers. The model number label also has power rating and regulatory information (see Figure 1-3). The serial number is located on a separate label on the - HP LaserJet 4000 | Service Manual - Page 25
660F 'Zg' - HP LaserJet 4000 | Service Manual - Page 26
100 V/115 V 220 V/240 V AMPS 9.4 Amperes 4.5 Amperes Table 1-5. Printer and Toner Cartridge Environmental Specifications In List, In Storage TEMPERATURE 10 to 32.5° C (50 to 91° F) 0 to 35° C (32 to 95° F) HUMIDITY 20 to 80% RH 10 to 80% RH Table 1-6. Acoustic Emissions Operation Postion - HP LaserJet 4000 | Service Manual - Page 27
listed in Table 1-6 may be ordered from Hewlett-Packard's Support Materials Organization (SMO). The phone number for SMO is 800-227-8164. Table 1-7. Related Documentation Document l HP Part Number LaserJet IIISi LaserJet 4Si SHIPPED WITH PRINTER: Setting Up Guide2 User's Reference Manual2 33491 - HP LaserJet 4000 | Service Manual - Page 28
Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration implemented regulations forlaser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. This printer Never operate or service the printer with the protective - HP LaserJet 4000 | Service Manual - Page 29
A DANGER-InvIsible law radiation when open. AVOID DIRECT EXPOSURE TO BEAM. CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. AVOID EXPOSURE TO BEAM. ATTENTION -RAYONNEMENT LASER INVISIBLE EN CAS D'OUVERTURE. EXPOSITION DANGEREUSE AU FAISCEAU. VORSICHT - UNSICHTBARE LASERSTRAHLU4G, WENN ABDECKUNG - HP LaserJet 4000 | Service Manual - Page 30
tested in a typical configuration with Hewlett-Packard Personal Computer and Test Systems. * When this printer is used without a Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department ZQ Standards Europe, Herrenberger &talk 130, D-7030 Boblingen (FAX: - 49-7031-14-3143) 1-10 - HP LaserJet 4000 | Service Manual - Page 31
pa annat satt an i bruksanvisning specificerats, kan anvandaren utsattas fiir osynlig laserstrilning. som iiverskrider gransen for laserklass 1. HOULTO HP LaserJet 4Si -kirjoittimen sisal] ei ole kayttajan huollettavissa olevia kohteita. Laitteen saa avata ja huoltaa ainoastaan sen huoltamiseen - HP LaserJet 4000 | Service Manual - Page 32
avoid contact with vinyl. A Material Safety Data Sheet (MSDS) for the toner cartridge used in the HP LaserJet IIISV4Si printers is available through Hewlett-Packard. By Mail. To obtain a MSDS for the 92291A LaserJet Toner Cartridge through the mail, call the Customer Information Center (CIC) at 800 - HP LaserJet 4000 | Service Manual - Page 33
used in accordance with the instruction manual, may cause harmful interference to Hewlett-Packard could void the user's authority to operate this equipment. Note: Use of a shielded cable is required to comply with the Class A limits of Part 15 of FCC rules. Note: In some configurations, this printer - HP LaserJet 4000 | Service Manual - Page 34
VCCI Statement (Japan) The VCCI statement below is required in Japan. It is similar to the FCC regulatory statement. anCatt, M-fint-WWIC7,1( RtiXitht6,(Et$0 -ritti] ti 411f1fMN) SUA vcc )Ativicmai., -cid E; 7r, Lti;a)l) 1:15tREMMISIctit-, -ciEboitzhaoi.G -rTo o 1-14 Product Information: RFI - HP LaserJet 4000 | Service Manual - Page 35
Hewlett-Packard warrants the LaserJet IIISi/4Si printer against defects in materials and workmanship for a period of one year from receipt by the customer. During the warranty period, HP will, at its option, either repair or replace products which prove to be defective. Note User maintenance - HP LaserJet 4000 | Service Manual - Page 36
(FRUs) HP LaserJet 111Si/4Si printers are designed to be repaired by the replacement of Field Replaceable Units (FRUs). An exchange program for some FRUs and PCAs is available. Service parts may be ordered from HP's Support Material Organization (SMO) or Parts Center Europe (PCE). Part numbers are - HP LaserJet 4000 | Service Manual - Page 37
for HP FIRST to HP authorized service providers. With HP FIRST you can receive: ■ Service notes. ■ Application notes. ■ Product data sheets. ■ Material Safety Data Sheets (MSDS). ■ Typeface and accessories information. ■ Printer support software information. ■ Toner information. ■ Driver request - HP LaserJet 4000 | Service Manual - Page 38
of this manual. Replacement parts may be ordered from HP's Support Material Organization (SMO) or from Parts Center Europe (PCE). SMO Hewlett-Packard Company Support Materials Organization 8050 Foothills Blvd. Roseville, CA 95678 Phone: 800-227-8164 PCE Hewlett-Packard Company Parts Center Europe - HP LaserJet 4000 | Service Manual - Page 39
Contents 2. Site Planning and Requirements INTRODUCTION 2-1 SITE REQUIREMENTS 2-1 Print Media Specifications 2-2 AC Power Line Considerations and Requirements 2-4 - HP LaserJet 4000 | Service Manual - Page 40
Figures 2-1. LaserJet IllSi/4Si Space Requirements 2-2 2-2. Sample Power Plot 2-4 Tables 2-1. Paper Specifications 2-3 2-2. Power Measurements (Watts) 2-5 2-3. Current Measurements (Amps) 2-5 - HP LaserJet 4000 | Service Manual - Page 41
and Requirements INTRODUCTION Correct location and placement of the LaserJet IIISi/4Si printer is important in maintaining the performance level set at the factory. The Service Representative must understand the printer's requirements to ensure selection of a suitable location. SITE REQUIREMENTS - HP LaserJet 4000 | Service Manual - Page 42
and background information for paper, envelopes, and other print media are contained in The HP LaserJet Family Paper Specifications Guide (P/N 5002-1801). More detailed print media specifications can also be found in Appendix E of the printer User's Reference Manual. 2-2 Site Planning: SITE - HP LaserJet 4000 | Service Manual - Page 43
Specifications Basis Weight 16 to 28 pounds. (60 to 105 g/m2 ). Furnish (Composition) 100% chemical wood pulp and/or cotton fiber. Recycled paper with up to 5% groundwood may be used. Grain Long grain. Moisture Content 4.7% ± 1% by weight. Caliper 3.0 to 7.0 mils. (0.091 to 0.18 mm). Curl - HP LaserJet 4000 | Service Manual - Page 44
for measuring the power consumed by the printer is to use the average of the measurements taken with the fuser ON, PLUS the average power peaks above of the fuser ON time to the fuser OFF time. 1200 1100 1000 900 800 r 700 ti g . 800 4- ON LEVEL 500 400 300 200 100 T 0 0 10 38 54 - HP LaserJet 4000 | Service Manual - Page 45
.7 amps 16.8 amps 30 msec 23.2 amps 800 msec This information is included to explain the current/wattage spikes that occur when the fuser cycles. The information in the above tables are measured values. Current and wattage specifications in Chapter 1 are maximums used for regulatory purposes. Site - HP LaserJet 4000 | Service Manual - Page 46
3-1 UNPACKING 3-2 THE CONTROL PANEL 3-3 The LaserJet IIISi Panel 3-4 The LaserJet 4Si Panel 3-4 LaserJet 4Si Menu Map 3-5 Localizing the Control Panel 3-5 Configuring for Network Use 3-5 Configuring Default Paper Size (LaserJet 4Si) 3-6 SELF TESTS 3-6 General 3-6 05 - HP LaserJet 4000 | Service Manual - Page 47
Panel 3-3 3-2. The LaserJet 4Si Control Panel 3-3 3-3. LaserJet 4Si Menu Map 3-4 3-4. LaserJet IIISi 05 Self test Printout 3-8 3-5. LaserJet 4Si 05 Self test Printout 3-10 3-6. Engine Test Button and Page 3-13 3-7. LaserJet 4Si Font Test Pages 3-15 3-8. LaserJet 4Si Demo Pages 3-16 - HP LaserJet 4000 | Service Manual - Page 48
3 Installation and Configuration INTRODUCTION The Service Representative should understand the site requirements of the printer and verify that the printer is installed properly. Each printer is tested for performance and carefully inspected before leaving the factory. To maintain the performance - HP LaserJet 4000 | Service Manual - Page 49
ON with the carrier's agent present. If the printer displays any sign of physical damage, or if it fails self test, do not accept the printer. Follow the unpacking and installation instructions in the Setting Up guide that is shipped with each printer. 3-2 Installation & Configuration: UNPACKING - HP LaserJet 4000 | Service Manual - Page 50
, to return to the Printing Menu (the first menu) from the PCL Menu (the second menu), press and l simultaneously. I=1 Ready = Manual = Duplex 00 READY On Line Menu Item Form Feed Continue Reset Figure 3-2. The LaserJet 4Si Control Panel Installation & Configuration: CONTROL PANEL 3-3 - HP LaserJet 4000 | Service Manual - Page 51
TIMEOUT CLR WARN AUTO CONT LOW TONER PCL MEM ADV FNCTNS PS: MEL!: FORM MANUAL FEED PWRSAVE" SERVICEMSG" "Only appears every 200,000 pages when the "USER MAINTENANCE" message is cisplayed. 'Orli),in vim mantiaciured aCier idiiya JOB OFFSET RET p LaserJet 4Si Menu Map [ Legend: Shaded items - HP LaserJet 4000 | Service Manual - Page 52
DOS and PostScript installations, the LaserJet IIISV4Si printers support Novell, 3Com, IBM Token Ring, Microsoft LAN Manager, Local Talk and UNIX network environments. (The LaserJet 4SiMX printer comes configured with network MIOs.) Configuration instructions for specific networks are contained in - HP LaserJet 4000 | Service Manual - Page 53
automatically changed the factory default paper size to A4 whenever the configured language was not English. Because of the wider range of possible language selections in the LaserJet 4Si printer, this is no longer adequate. Therefore, the LaserJet 4Si firmware allows customization of the factory - HP LaserJet 4000 | Service Manual - Page 54
. • Formatter logic. • All LEDs. Information about page count, date codes, and configuration selections is printed. The information is summarized in Figure 3-4 (LaserJet and Figure 3-5 (LaserJet 4Si). Running an 05 Self Test LaserJet IIISi: With the printer off-line, press and hold down the - HP LaserJet 4000 | Service Manual - Page 55
TRAY OUI WIN PAPER ORIENTATION FORM MANUAL FEED SW SET - I . NT Grirral) . o • OFF . HOPI . UPPER LETTHII - Y (Naval, - SO LINES . OFF . ROLLA,' AO CONFICIURATION: HP - 2564 flERIALCENTRONIC-9 FW FEV- 1OO REV. al PO . PARALLEL AIN F UNCTICAG.MJ CONFIGURATION WM: SYS . HP.PCL SYS SWITCH - HP LaserJet 4000 | Service Manual - Page 56
is rounded down to the nearest ten-page increment and recorded in non-volatile memory. 6. Serial Number Shows the printer's serial number. 7. Installed Devices: Shows firmware and internal font date codes (in YYYYMMDD format), as well as installation of cartridges and media tray size. 8. Scalable - HP LaserJet 4000 | Service Manual - Page 57
Firmware Oluecode! 19921O16 V6.2 Control Pmnol ,oek tuituar DISADLEC Control Plow poosuord Stolut, 015.110 F., Cartridges 1101E Paper /0103456789: ; ...7:1411CDEFONI PC )-II*MA' t 41.•0• ,166.,...64;mA4•4\6,100 LaserJet 4Si 05 Self Test Printout 3-10 Installation & Configuration: SELF TESTS - HP LaserJet 4000 | Service Manual - Page 58
the MIO Configuration menu.) 2. Serial Number Shows the printer's serial number. 3. RAM Size: Shows how much memory is installed in the printer. 2048 Kbytes is standard. If optional memory has been added, a self test can be used to verify installation. 4. Page Count: Shows how many pages have been - HP LaserJet 4000 | Service Manual - Page 59
(continue) key terminates the continuous test mode On Line) returns the printer to on-line state, Contintie) remains off-line). The 04 will flash while the buffered pages print and self test is being aborted. (Depending on the memory configuration, several pages may be buffered.) 3-12 Installation - HP LaserJet 4000 | Service Manual - Page 60
access hole is located on the front of the printer, next to the font cartridge slots (see Figure 3-6). Press the Test Print button page of vertical lines will be printed if the print engine is operating correctly (see Figure 3-6). Figure 3-6. Engine Test i3uzion and Page Installation & Configuration - HP LaserJet 4000 | Service Manual - Page 61
Font Test Pages The printer's font test pages provide samples of the PCL and PostScript typefaces and bitmapped fonts currently available in the printer. (The LaserJet IIISi printer generates a PCL font list only.) LaserJet IllSi • Take the printer off-line. • Clear any buffered data (form-feed - HP LaserJet 4000 | Service Manual - Page 62
dm MCD61.4•0 AICIAtu.fia, rtelaaw. up. UN ON AONVON.N., - IIP LaserJet 4..St Printer Go.. C Om CNN CON Nemo.. mamanosaut aiNNONost o•LaNs..47. PCL Typeface Oak cre NoAss0 oactedwo..- 01•44.1113 • t :." Figure 3-7. LaserJet 4Si Font Test Pages Installation & Configuration: SELF TESTS 3-15 - HP LaserJet 4000 | Service Manual - Page 63
45 ticeithle Typeface, Li. PAPER HANDLING EVA Enhanced ' t PCLS IBA HEWLETT -I PACKARD 140 Pe/f0/7/7817Ce 600 DPI Ut3 HEWLETT PACKARD IrA--------,,3-COLNNeEC1a,w,r.y, ASPER HANDLING (41rLwes,vrieml 2 Figure 3-8. LaserJet 4Si Demo Pages 3-16 Installation & Configuration: SELF TESTS - HP LaserJet 4000 | Service Manual - Page 64
Maintenance Concept 4-1 PRINTER CONSUMABLES 4-1 TONER CARTRIDGE LIFE EXPECTANCY . 4-2 VERIFYING PRINTER MAINTENANCE 4-3 USER MAINTENANCE 4-4 Fusing Assembly 4-5 Transfer Roller 4-7 Transfer Roller Replacement 4-8 Pickup and Separation Rollers 4-9 Duplex D-Roller 4-10 CLEANING - HP LaserJet 4000 | Service Manual - Page 65
4-1. Sample 5% Page Coverage 4-2. Location of Printer Maintenance Parts 4-3. Removing the Fusing Assembly Screws 4-4. Removing the Fusing Assembly 4-5. Removing the Transfer Roller 4-6. Removing the Pickup and Separation Rollers 4-7. Removing the Duplex D-Roller 4-8. Printer Component Locations (Top - HP LaserJet 4000 | Service Manual - Page 66
extended warranty policies. PRINTER CONSUMABLES The printer consumables are: ■ Part no. 92291A HP LaserJet Toner Cartridge. ■ Part no. C2062A 100/110VAC Printer Maintenance Kit. ■ Part no. C2087A 220/240VAC Printer Maintenance Kit. Toner cartridges and printer maintenance kits are available through - HP LaserJet 4000 | Service Manual - Page 67
ENS C ACM a EEEEC [[EE KEXt ELSE SENS till CAS= XX .MAX III 1[111 [SEIM ILEX SILK Su VEX IEESELEf EEll kEECtEt[IMER mucrueurrta Figure 4-1. Sample 5% Page Coverage 4-2 Printer Maintenance: TONER CARTRIDGE - HP LaserJet 4000 | Service Manual - Page 68
. Replace the Fusing Assembly if paper jams in the Fusing Assembly or if print quality problems related to poor fusing occur. Replace as indicated by glazing and Duplex Unit failures. -887--- - -O----Th t ....__ Figure 4-2. Location of Printer Maintenance Parts Printer Maintenance: VERIFYING - HP LaserJet 4000 | Service Manual - Page 69
message is displayed, the printer has printed 200,000 pages and printer maintenance is required. When the printer maintenance has been completed, clear the message and continue printing (see "Clearing the Service Message" in Chapter 7). The parts to be replaced are: 1. Fusing Assembly. 2. Transfer - HP LaserJet 4000 | Service Manual - Page 70
service. 2. Open the printer's Top Cover, and remove the toner cartridge. Store the toner cartridge out of direct light. 3. Remove the (4) screws attaching the Fusing Assembly to the printer (see Figure 4-3). >• Figu►e 4-3. Removing the Fusing Assembly Screws Printer Maintenance: USER MAINTENANCE - HP LaserJet 4000 | Service Manual - Page 71
4-4), or paper jams will result during printer operation. It is important that this sensor be free throughout its entire range of motion. 4. Slide the Fusing Assembly to the left, then slowly up and out toward the front of the printer (to avoid the toner cartridge holder). For replacement, observe - HP LaserJet 4000 | Service Manual - Page 72
replacing the Transfer Roller. To remove and replace the roller, follow the steps below. Caution Do not attempt to clean or re-use the Transfer Roller. Removal 1. Turn OFF and unplug the printer. 2. Remove the paper trays. 3. Open the printer Roller's Shaft. For replacement, observe how the - HP LaserJet 4000 | Service Manual - Page 73
the roller shaft. 3. Replace the plastic retaining clip guide, reducing lateral movement of the Transfer Roller and right end bushing. 4. Close the printer and run a self test. Check that paper will travel the full length of the paper path without jamming. 4-8 Printer Maintenance: USER MAINTENANCE - HP LaserJet 4000 | Service Manual - Page 74
replacement parts for the Pickup and Separation Rollers are identical. To remove the rollers follow the steps below. I. Turn OFF and unplug-the printer. 2. Remove both paper Discard the used rollers. 10 Figure 4-6. Removing the Pickup and Separation Rollers Printer Maintenance: USER MAINTENANCE 4-9 - HP LaserJet 4000 | Service Manual - Page 75
, the Duplex D-Roller will need to be replaced during printer maintenance. 1. Turn OFF and unplug the printer. 2. Remove both paper trays. 3. With your left hand, lift the If not, duplex paper jams will occur. O 0 Figure 4-7. Removing the Duplex D-Roller 4-10 Printer Maintenance: USER MAINTENANCE - HP LaserJet 4000 | Service Manual - Page 76
THE PRINTER Whenever the printer maintenance parts are replaced, the printer should also be cleaned. Use the instructions in this section when cleaning the printer. Note If toner gets on your clothes, wipe it off with a dry cloth and wash the clothes in cold water. Hot water sets toner into - HP LaserJet 4000 | Service Manual - Page 77
i______111111111111111 0 0 0 C t l Figure 4-8. Printer Component Locations (Top Cover open) 1. Transfer Roller 2. Anti-Static Teeth 3. Upper Paper Path Access 4. Registration Guide 5. Cleaning Brush 6. Transfer Guide 7. Fusing Assembly 4-12 Printer Maintenance: CLEANING THE PRINTER - HP LaserJet 4000 | Service Manual - Page 78
cleaning the printer. Reduced print quality may result. 4. Open the Upper Registration Guide by lifting the green handle. Wipe residue off the Lower Registration Guide. 5. Close the Upper Registration Guide. Figure 4-9. Cleaning the Registration Area Printer Maintenance. CLEANING THE PRINTER 4-13 - HP LaserJet 4000 | Service Manual - Page 79
Roller (see Figure 4-10). 2. Locate the Cleaning Brush (callout 5 in Figure 4-8). 3. Carefully brush paper and other foreign material from the Antistatic Teeth. 4. Replace the Cleaning Brush in its holder. 1 I I L Figure 4-10. Cleaning the Antistatic Teeth 4-14 Printer Maintenance: CLEANING THE - HP LaserJet 4000 | Service Manual - Page 80
the Transfer Guide (see Figure 4-11) with a damp cloth (use water only). Be careful not to touch the Transfer Roller. Warning The Fusing Assembly remains hot for thirty minutes after turning the printer OFF. Figure 4-11. Cleaning the Transfer Guide Printer Maintenance: CLEANING THE PRINTER 4-15 - HP LaserJet 4000 | Service Manual - Page 81
and reset the maintenance count to zero, take the printer off-line and perform the following: LaserJet IIISi • Press and hold the a dMi key until the message PCL CONE I G MENU appears in the Control Panel display. • Briefly press the c'ql,M key to scroll through the configuration menu until SER - HP LaserJet 4000 | Service Manual - Page 82
Contents 5. Functional Overview INTRODUCTION 5-1 IMAGE FORMATION SYSTEM 5-1 PAPER PICKUP AND FEED SYSTEM 5-4 BASIC SEQUENCE OF OPERATION 5-6 Overview 5-6 Standard Printer Operation 5-6 Timing Diagram 5-7 MIO 5-9 - HP LaserJet 4000 | Service Manual - Page 83
Figures 5-1. Diagram of the Image Formation System 5-3 5-2. The Paper Path 5-4 5-3. Printer Functional Block Diagram 5-5 5-4. Printer Timing Diagram 5-8 - HP LaserJet 4000 | Service Manual - Page 84
is transferred to paper by the Transfer Charging Roller as a visible image. Before and after each image is processed the photosensitive drum is cleaned in preparation for the next image. The image formation process centers around the photosensitive drum contained in the toner cartridge and consists - HP LaserJet 4000 | Service Manual - Page 85
onto the paper. Note Because replacing the toner cartridge is an operator's task, it eliminates the need for a service call when these parts must be replaced. A cross-section of the toner cartridge detailing the image formation system and its relationship to other printer components is illustrated - HP LaserJet 4000 | Service Manual - Page 86
blade 1 '\ Photosensitive arum Blade Developing cylinder ... Separation / r,o,,ll,e, rs ,---. / -"cael Upper ,,Cartridge pick-up roller Upper fusing roller Pressure roller Transfer guide II Registration rollers Lower pick-up roller Static charge Transfer roller eliminator - HP LaserJet 4000 | Service Manual - Page 87
separated from the drum and transferred to the Fusing Assembly where the toner image is fused to the paper. The printed page is then delivered to either the face-up or face-down paper tray. The printer's paper path is illustrated in Figure 5-2. A functional diagram of the Pickup/Feed System - HP LaserJet 4000 | Service Manual - Page 88
Figure 5-3. Printer Functional Block Diagram Functional Overview: PAPER PICKUP & FEED To host t computer. PICK-UP/FEED SYSTEM position Laser unit 1:1 Scanner motor Envelope feeder (Octblial) tipper manual feed tipper cassette Lower maimaIleed_l Lower cassette Dupiaxing loader Second-pass - HP LaserJet 4000 | Service Manual - Page 89
completed the Warm-up period and is ready to print, the DC Controller sends a READY signal (RDY) to the Formatter to report that the printer is ready. 3. After the RDY signal is true and print data is ready to be transmitted, the Formatter sends a PRINT signal (PRNT) to the DC - HP LaserJet 4000 | Service Manual - Page 90
DC Controller then checks for another PRNT signal. 10. If another PRNT signal is detected, the Print period continues with another page. 11. If the DC Controller fails to receive a PRNT signal before the end of the page passes over the Input Paper Sensor (PS3), the DC Controller initiates the Last - HP LaserJet 4000 | Service Manual - Page 91
Primary Charging Roller (AC) VERTICAL SYNC REQUEST Developing bias (DC) Developing bias (AC) Registration Roller Clutch Solenoid Laser Diode 190°C100°C !III4/41 4-42,5 -1500V 1.1sec. 190°C 4-ic 2.5 sec MI About 0.3 sec. -H- 0.03 sec. - 0.05 sec. - 0.02 sec. • MIN LSTR1 LSTR2 LSTR3l STBY E co - HP LaserJet 4000 | Service Manual - Page 92
I/O architecture and are not supported in the LaserJet IllSi printer. In the LaserJet 4Si, the older MIO cards are supported in the lower MIO slot only. Refer to "Interfaces and LAN Network Cards" in Chapter 8 for complete listings of supported MIO configurations. Functional Overview: MIO 5-9 - HP LaserJet 4000 | Service Manual - Page 93
Contents 6. Removal and Replacement INTRODUCTION 6-1 REQUIRED TOOLS 6-2 HARDWARE REVIEW 6-2 COVERS 6-3 Right Side Cover 6-3 Front Upper Cover Assembly 6-4 Front Cover 6-6 Control Panel Assembly 6-9 Left Side Cover 6-10 Right Rear Cover 6-11 Lower Rear Cover 6-12 RIGHT SIDE - HP LaserJet 4000 | Service Manual - Page 94
Unit (PIU) PCA INTERNAL ASSEMBLIES Laser/Scanner Assembly Registration Assembly Paper Refeed Unit (PRU) Transfer Guide High Voltage Power Supply Main Motor Drive Train Left Block Right Block TOP COVER ASSEMBLY AND SUBASSEMBLIES Top Cover Assembly/Hinge Pins Job Offset Assembly - HP LaserJet 4000 | Service Manual - Page 95
Controller (continued) 6-25. Power Switch 6-26. Paper Input Unit (PIU) 6-27. Paper Input Unit PCA 6-28. Laser/Scanner Assembly 6-29. Registration Assembly 6-30. Paper Refeed Unit 6-31. Transfer Guide 6-32. High Voltage Power Supply 6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 6-10 6-11 6-12 6-14 6-16 6-19 6-21 - HP LaserJet 4000 | Service Manual - Page 96
44 6-37. Left Block (continued) 6-44 6-38. Right Block 6-46 6-39. Right Block (continued) 6-46 6-40. Top Cover Assembly 6-47 6-41. Top Cover Support Bracket 6-48 6-42. Top Cover Assembly (continued) 6-49 6-43. Job Offset Assembly 6-50 6-44. Job Offset Assembly (continued) 6-51 6-45 - HP LaserJet 4000 | Service Manual - Page 97
. Note 1. Always remove the toner cartridge from the printer before removing or replacing printer parts. 2. The terms, "right" and "left", used in these procedures assume that you are facing the front of the printer. Caution The LaserJet IIISi/4Si contains parts that are electrostatic discharge - HP LaserJet 4000 | Service Manual - Page 98
10-inch shaft) 1 #1 Flat-head Screwdriver 1 Small Needle Nose Pliers 1 Small Flat -head Screwdriver (2-inch x :;: -inch) HARDWARE REVIEW All screws used in this printer use Pozidriv screwdrivers in this printer. Damage to the screw heads will result. 6-2 Removal & Replacement: HARDWARE REVIEW - HP LaserJet 4000 | Service Manual - Page 99
Right Side Cover (see Figure 6-2, callout 1). 2. Slide the cover to the rear until it stops. Slide the cover down and remove it from the printer. Note that the Right Side Cover has tabs that fit into slots on the Front Upper Cover. mEmmispomims. vmmEmpai imi . .isb Yammoloi .110. • •=1=014 - HP LaserJet 4000 | Service Manual - Page 100
Feeder Cover to remove (see Figure 6-3). 4. From the front of printer, remove the (2) screws shown in Figure 6-3, callout 1. These (2) screws are on steel flanges. (continued on next page) 0 -1 Pt IP ..momiimmummommlillimoom 9PPIEJNI. Figure 6-3. Front Upper Cover 6-4 Removal & Replacement: COVERS - HP LaserJet 4000 | Service Manual - Page 101
Front Upper Cover Assembly (continued) 5. Open the printer and remove the (3) screws shown in Figure 6-4, callout 1. Lift the Front Upper Cover Assembly up to remove. • r Figure 6-4. Front Upper Cover (continued) Removal & Replacement: COVERS 6-5 - HP LaserJet 4000 | Service Manual - Page 102
6-4). 4. Remove the (2) screws securing the Front Cover on the right side of the printer (see Figure 6-5, callout 1). 5. Remove the (1) screw securing the Front Cover on the lower left side of the printer (not shown). (continued on next page) Figure 6-5. Front Cover 6-6 Removal & Replacement: COVERS - HP LaserJet 4000 | Service Manual - Page 103
in Figure 6-6, callout 1. 7. Grasp the crossmember between the two cassette cavities and pull outward to release the (2) pressure clips (see Figure 6-6, callout 2). (continued on next page) ono 1 Figure 6-6. Front Cover (continued) Removal & Replacement: COVERS 6-7 - HP LaserJet 4000 | Service Manual - Page 104
Front Cover (continued) 8. Tilt the cover outward at the top to access and unplug the Control Panel connector (push connector clips outward to release). Remove the Front Cover (see Figure 6-7). -9 "41 Figure 6-7. Front Cover (continued) 6-8 Removal & Replacement: COVERS - HP LaserJet 4000 | Service Manual - Page 105
a flat surface. 2. Remove the (4) screws securing the Control Panel and remove the Control Panel from the Front Cover (see Figure 6-8, callout 1). • 0 • • Figure 6-8. Control Panel Removal & Replacement: COVERS 6-9 - HP LaserJet 4000 | Service Manual - Page 106
Left Side Cover 1. Remove any paper trays. 2. Remove the Right Side Cover (see Figure 6-2). 3. Remove the Front Upper Cover (see Figure 6-3). 4. Remove the Front Cover (see Figure 6-9, callout 2), and remove the Left Side Cover. -. ~eu O Figure 6-9. Left Side Cover 6-10 Removal & Replacement: COVERS - HP LaserJet 4000 | Service Manual - Page 107
Cover (see Figure 6-10, callout 1). 2. Slide the cover down to free it from its mounts and remove the cover. IIMEM sal Mb Mb IMMII - • IND all t MEM • SM. NM ,M•Mi m m• I ", MM iltAIM 'M IN* • MEM ••m• • Figure 6-10. Right Rear Cover Removal & Replacement: COVERS 6-11 - HP LaserJet 4000 | Service Manual - Page 108
Lower Rear Cover 1. Remove the Right Rear Cover (see Figure 6-10). 2. Remove the (1) screw securing the Lower Rear Cover (see Figure 6-11, callout 1). 3. Slide the cover to the left to remove it. 4 Figure 6-11. Lower Rear Cover 6-12 Removal & Replacement: COVERS - HP LaserJet 4000 | Service Manual - Page 109
Pan Cover A. Fan FM3 2. Formatter PCA and Pan Assembly 3. Fan FM1 4. Fan FM2 5. AC Power Inlet Assembly 6. DC Power Supply PCA 7. DC Controller PCA Removal & Replacement: RIGHT SIDE ASSEMBLIES 6-13 - HP LaserJet 4000 | Service Manual - Page 110
callout 1). 3. Pull the bottom of the cover outward and lift up to remove. When part way out, unplug the fan connector (FM3) (see Figure 6-13, callout 1). aa • 6-12) allows access to the SIMM cards. Remove or replace the SIMM cards through this Panel Door. Do not remove the Formatter Pan Cover to - HP LaserJet 4000 | Service Manual - Page 111
the fan (FM2). Be certain the fingers are not crimped when the remaining screws are installed. 7. Install the remaining screws and tighten all (8) screws. Removal & Replacement: RIGHT SIDE ASSEMBLIES 6-15 - HP LaserJet 4000 | Service Manual - Page 112
(2) screws securing the fan motor and remove the fan FM3 (see Figure 6-13, callout 2). Note New fan assemblies do not include the fan adaptor plate. 2 -0 41.7 •. Figure 6-13. Fan FM3 6-16 Removal & Replacement: RIGHT SIDE ASSEMBLIES - HP LaserJet 4000 | Service Manual - Page 113
or replacing the Formatter Pan Assembly, note whether or not the PostScript option and/or any optional memory has been LaserJet HISi (3200J and above) and all LaserJet 4Si printers use PostScript SIMMs instead of ROMs. Another change in Formatter design at this time was the addition of support - HP LaserJet 4000 | Service Manual - Page 114
printing configurations. PostScript Installation When installing PostScript, follow the instructions in the Installation Guide. Be certain to use proper ESD precautions such as using grounding straps, and not touching any conductive pins. LaserJet IliSi Formatter PCA Removal When replacing the - HP LaserJet 4000 | Service Manual - Page 115
screws on the rear of the printer and sliding the card(s) out the rear (Figure 6-14, callout 1). 4. Remove any memory or PostScript SIMM modules (for p • .-' ii--'------ = 1 - t 7 i ' 4 Figure 6-14. Formatter PCA (LaserJet 4Si) Removal & Replacement: RIGHT SIDE ASSEMBLIES 6-19 - HP LaserJet 4000 | Service Manual - Page 116
in Chapter 7. Note After replacing a Formatter PCA, re-enter the printer's serial number, set the Page Count to match the original Formatter, and set the Maintenance Count to reflect the useful life of consumable parts. (See "Setting the Page Count" in Chapter 7.) LaserJet 111Si Only: When - HP LaserJet 4000 | Service Manual - Page 117
61 U301 0 en D U308 0 cn Figure 6-15. LaserJet IliSi PostScript ROM Locations (prior to 3200J) 4g, J4s( awn ■ L, mor r ,r• Nmer • ' MEM • NM ME , EMI. ESD ION C UM L. 6...„ r. Figure 6-16. LaserJet IliSi Formatter Pan Assembly Removal & Replacement: RIGHT SIDE ASSEMBLIES 6-21 - HP LaserJet 4000 | Service Manual - Page 118
Figure 6-17. LaserJet 4Si Formatter Pan Assembly Formatter Pan Reassembly Tips Caution When replacing the Formatter Pan Assembly, do not pull on the black Ml0 guide rails. Instead, into their slots on the bottom edge of the printer frame. 3. Tilt the top of the pan into place and slightly lift - HP LaserJet 4000 | Service Manual - Page 119
6-18, callout 1). 5. Remove the (1) screw securing Fan FM1 and remove the fan (see Figure 6-18, callout 2). • e • 4 PI, 64k I. oe. Figure 6-18. Fan FM1 ESD Removal & Replacement: RIGHT SIDE ASSEMBLIES 6-23 - HP LaserJet 4000 | Service Manual - Page 120
). 4. Unplug the (1) connector (J7) from the DC Power Supply (see Figure 6-19, callout 1). 5. Two tabs on the fan housing mount the Fan Assembly to the printer frame. Release the fan from its mounts by sliding it one inch straight out the right side of the - HP LaserJet 4000 | Service Manual - Page 121
the Right Rear Cover (see Figure 6-10). 2. Remove the Right Side Cover (see , callout 1). 6. Unplug (1) connector (J152) from the AC Driver PCA (behind the Sensor PCA - see Figure 6-20, callout 6-20, callout 4). (continued on next page) S 1 ESD ling,. pied 0301011 4. Or"- .1 - HP LaserJet 4000 | Service Manual - Page 122
to replace the star washer in its correct location. 10. Remove the (2) screws (in plastic standoffs) located at the rear of the printer which AC Driver PCA carefully before pushing into place. The Power Inlet Assembly is easier to re-install if the Fusing Assembly is installed in the printer (this - HP LaserJet 4000 | Service Manual - Page 123
Power Supply (see Figure 6-22, callout 4). 9. Lift the DC Power Supply up and out to remove it. RIP M ESD 0 • • r •~ Figure 6-22. DC Power Supply Removal & Replacement: RIGHT SIDE ASSEMBLIES 6-27 - HP LaserJet 4000 | Service Manual - Page 124
, J8, J10, J11, J12, J13, J15, and J18 (or J1001, J1002, etc.). Note Connector J1 (or J1001) is the beam detect fiber-optic cable. When replacing, be sure connector is fully seated. Connectors J1005 and J1014 are factory test connectors and are not used in the field. (continued on next - HP LaserJet 4000 | Service Manual - Page 125
S ESD It I 1 Figure 6.23. DC Controller Removal & Replacement: RIGHT SIDE ASSEMBLIES 6-29 - HP LaserJet 4000 | Service Manual - Page 126
to holding the PCA in place, the retaining bracket ensures that the toner cartridge sensitivity switches are located correctly. Be careful not to damage this bracket or the sensitivity switches when replacing the DC Controller PCA. 9. Unlatch the (4) retaining clips securing the DC Controller - HP LaserJet 4000 | Service Manual - Page 127
Power Switch 1. Remove the power cord from the printer. 2. Remove the Right Side Cover (see Figure 6-2). 3. Remove the Formatter Cover (see Figure 6-12). 4. Switch tabs, and remove the switch (see Figure 6-25, detail A). 2 Figure 6-25. Power Switch Removal & Replacement: RIGHT SIDE ASSEMBLIES 6-31 - HP LaserJet 4000 | Service Manual - Page 128
6-26, callout 2). 6. Slide the PIU straight out the front of the printer. When reinstalling the PIU, be sure to mount it on the upper locating rails before sliding it into the printer. :Jim:N=a1im6,s4k 2 ■ I • • Figure 6-26. Paper Input Unit (PIU) 6-32 Removal & Replacement: PIU AND SUBASSEMBLIES - HP LaserJet 4000 | Service Manual - Page 129
see Figure 6-3). 3. Remove the Front Cover (see Figure 6-5). 4. Remove the Paper Input Unit (see Figure 6-26). 5. Unplug the (3) connectors on the component • . ...•4. art yk . • I „NI 3 4r 4* .4.1 ESD Figure 6-27. Paper Input Unit PCA Removal & Replacement: PIU AND SUBASSEMBLIES 6-33 - HP LaserJet 4000 | Service Manual - Page 130
ASSEMBLIES This section lists procedures for removing the following Internal Assemblies: 1. Laser/Scanner Assembly 2. Registration Assembly 3. Paper Refeed Unit (PRU) 4. Transfer Guide 5. High Voltage Power Supply 6. Main Motor Drive Train Note a ir Internal Assemblies also include the Transfer - HP LaserJet 4000 | Service Manual - Page 131
from its retainer. 5. Remove the (4) screws securing the Laser/Scanner Assembly and remove the assembly (see Figure 6-28, callout 3). 0 • ..1/1/.. Figure 6-28. Laser/Scanner Assembly Removal & Replacement INTERNAL ASSEMBLIES 6-35 - HP LaserJet 4000 | Service Manual - Page 132
guide during reassembly to prevent paper jams. During reassembly, hold the Registration Assembly clutch solenoid in its fully actuated position, and carefully mate the Registration Assembly gears to the solenoid. ■ oi 1,0 O(T O Figure 6-29. Registration Assembly 6-36 Removal & Replacement - HP LaserJet 4000 | Service Manual - Page 133
black hood and pull to unplug the (1) Paper Refeed Unit connector (see Figure 6-30, callout 1). 6. Remove the (2) screws securing the Paper Refeed Unit and remove the unit (see Figure 6-30, callout 2). I' • (4) J' I Figure 6-30. Paper Refeed Unit Removal & Replacement: INTERNAL ASSEMBLIES 6-37 - HP LaserJet 4000 | Service Manual - Page 134
that hold it to the side of the printer. 4. Remove the (3) screws securing the Transfer Guide and remove the guide (see Figure 6-31, callout 1). Note Older models of the LaserJet IIISi use a star washer only on the far left screw. Be certain to replace the star washer in its correct location. ri - HP LaserJet 4000 | Service Manual - Page 135
Power Supply 1. Open the printer. 2. Remove the Fusing Assembly (see Chapter 4). 3. Remove the Transfer Roller (see Chapter 4). Use gloves when handling the Transfer Roller. 4. Remove the Transfer Guide (see Figure 6-31). 5. Unplug the (1) single-pin connector (Figure 6-32, callout 1). 6. Remove the - HP LaserJet 4000 | Service Manual - Page 136
gloves when handling the Transfer Roller. 4. Remove the Fusing Assembly (see Chapter 4). 5. Remove the Transfer Guide (see Figure 6-31). 6. Remove the High Voltage Power Supply (see Figure 6-32). 7. Remove the (2) screws securing the Main Motor Cover and remove the cover (see Figure 6-33, callout - HP LaserJet 4000 | Service Manual - Page 137
the cables clear to prevent damage. 10. Remove the (1) screw securing the Main Motor PCA (see Figure 6-34, callout 3). 11. Slide the PCA toward the left to unplug it from the connector and remove. 4 • • Figure 6-34. Main Motor Drive Train (continued) Removal & Replacement: INTERNAL ASSEMBLIES 6-41 - HP LaserJet 4000 | Service Manual - Page 138
assembly by sliding toward the left and lifting upward (see Figure 6-35, callout 1). Mi No • • IIP Figure 6-35. Main Motor Drive Train (continued) 6-42 Removal & Replacement: INTERNAL ASSEMBLIES - HP LaserJet 4000 | Service Manual - Page 139
(see Figure 6-26). 10. The Paper Refeed Unit (see Figure 6-30). Place the screws removed to this point, back in their holes before continuing the procedure. Complete the removal as follows: 11. From the left side of the printer, remove the (2) screws which secure the left fuser support bracket (see - HP LaserJet 4000 | Service Manual - Page 140
I S. . • •• ••00111.MS 411,111.M. AI 4 • Figure 6-36. Left Block • Figure 6-37. Left Block (continue: , 6.44 Removal 8 Replacement: INTERNAL ASSEMBLIES - HP LaserJet 4000 | Service Manual - Page 141
The (1) screw securing the Top Cover Assembly support bracket (see Figure 6-41, callout 1). 4. The Inner Right Cover. 8. The Transfer Guide (see Figure 6-31). 9. The Main Motor Drive Train (see Figure 6-33 through Figure 6-35). 10. The Formatter printer. Removal & Replacement: INTERNAL ASSEMBLIES 6-45 - HP LaserJet 4000 | Service Manual - Page 142
Figure 6-38. Right Block 0 • ir • Q Figure 6-39. Right Block (continued) 6-46 Removal & Replacement: INTERNAL ASSEMBLIES - HP LaserJet 4000 | Service Manual - Page 143
Offset Assembly B. Solenoid Adjustments C. Delivery Roller Assembly Top Cover Assembly/Hinge Pins 1. Open the printer. 2. Remove the toner cartridge. 3. Remove the Right Rear Cover (see Figure 6-10). 4. Unlatch (1) cable clamp (see Figure 6-40, callout 1). 5. Disconnect (1) cable from the AC Power - HP LaserJet 4000 | Service Manual - Page 144
Top Cover Assembly (continued) 6. Remove the (1) shoulder screw securing the Top Cover Assembly support bracket (see Figure 6-41, callout 1). Figure 6-41. Top Cover Support Bracket 6-48 Removal & Replacement: TOP COVER & SUBASSEMBLIES - HP LaserJet 4000 | Service Manual - Page 145
left hinge plate, and the (2) screws securing the right hinge plate (see Figure 6-42, callout 2). 9. Carefully, separate and remove the Top Cover Assembly from the printer. 0 p A\ Figure 6-42. Top Cover Assembly (continued) Removal & Replacement: TOP COVER & SUBASSEMBLIES 6-49 - HP LaserJet 4000 | Service Manual - Page 146
the Job Offset Assembly: 1. Release the Top Cover support bracket (see Figure 6-41). 2. Remove the Right Rear Cover (see Figure 6-10). 3. From the right end of the Top , callout 3). (continued on next page) 6 4 Figure 6-43. Job Offset Assembly 6-50 Removal & Replacement: TOP COVER & SUBASSEMBLIES - HP LaserJet 4000 | Service Manual - Page 147
5). 9. On the right rear of the printer, unplug the 18-pin Job Offset cable connector from the AC Power Inlet Assembly. 10. Remove the (4) screws (2 on each side then lift it out of the printer. *161, • Figure 6-44. Job Offset Assembly (continued) Removal & Replacement: TOP COVER & SUBASSEMBLIES 6-51 - HP LaserJet 4000 | Service Manual - Page 148
stops (in their fully actuated position) and place a 0.5mm shim (a small paper clip will work) between the solenoid body and the stop ring on the solenoid solenoids i❑ the printer. (0.5mm O Figure 6-45. Setting Clearance Between Stop Ring Solenoid Body 6-52 Removal & Replacement: TOP COVER & - HP LaserJet 4000 | Service Manual - Page 149
the assembly away from the Top Cover Assembly. Ire" re. PM. IF 0 11,01.10Mmiei ONImmml lopm.• I - -• I - • milMIOM 11111111111111 ■ Figure 6-46. Delivery Roller Assembly Removal & Replacement: TOP COVER & SUBASSEMBLIES 6-53 - HP LaserJet 4000 | Service Manual - Page 150
Left Side Covers (see Figure 6-2 and Figure 6-9). 2. Remove the (4) screws that attach each corner of the Duplex Unit to the printer frame (see Figure 6-47). 3. Lift and pull the Duplex Unit straight out the rear of the printer. e if Figure 6-47. Duplex Unit 6-54 Removal & Replacement: DUPLEX UNIT - HP LaserJet 4000 | Service Manual - Page 151
J406. 3. Remove the (2) screws securing the Duplex PCA, and remove the PCA (see Figure 6-48, callout 2). 011111101. 104. 0 4to Figure 6-48. Duplex PCA ESD Removal & Replacement: DUPLEX UNIT 6-55 - HP LaserJet 4000 | Service Manual - Page 152
6-56 Removal & Replacement: DUPLEX UNIT - HP LaserJet 4000 | Service Manual - Page 153
and Delivery Jams Duplex Assembly Paper Jams "14 NO TONER CART" Message Drum Sensitivity Switches (SW1002 and SW1003) Functional Check "16 TONER LOW" Message Toner Low Functional Check "41 ERROR" Message 7-1 7-2 7-2 7-3 7-4 7-8 7-9 7-21 7-23 7-23 7-24 7-26 7-27 7-29 7-32 7-32 7-32 7-32 7-33 7-33 - HP LaserJet 4000 | Service Manual - Page 154
Supply PCA Paper Feed PCA DC Controller PCA AC Driver PCA High Voltage Power Supply PCA Voltage Test Points Formatter Service Configuration Cold Reset Accessing the Error Log LaserJet 1IISi LaserJet 4Si Service Mode Accessing the Service Mode Setting Page Count, Maintenance Count, Serial Number - HP LaserJet 4000 | Service Manual - Page 155
Viewing the Fault Log LaserJet IIISi LaserJet 4Si Sending the Fault Log Over a Bitronics Port . Extended Diagnostic Test Options Exiting Extended Diagnostics PRINT QUALITY DEFECT SUMMARY Repetitive Defect Templates IMAGE FORMATION TROUBLESHOOTING . . Half Self Test Functional Check Drum Rotation - HP LaserJet 4000 | Service Manual - Page 156
PCA Components 7-13. Paper Feed PCA Components 7-14. DC Controller PCA Components - LaserJet IIISi 7-15. DC Controller PCA Components - LaserJet 4Si 7-16. AC Driver PCA Components 7-17. High Voltage Power Supply PCA Components . 7-18. Formatter Service Configuration 7-19. Service Mode Menu Map 7-20 - HP LaserJet 4000 | Service Manual - Page 157
"UC/LC LOAD" Message Checks 7-25 7-5. Configuration of Tray Size Sensing Switches 7-26 7-6. "12 PRINTER OPEN" Checks 7-27 7-7. "14 NO TONER CART" Checks 7-36 7-8. "16 TONER LOW" Checks 7-38 7-9. "50 SERVICE" Fuser Malfunction Checks . 7-41 7-10. "51 ERROR" Beam Detect Checks 7-43 7-11 - HP LaserJet 4000 | Service Manual - Page 158
7-38. Background Scatter 7-39. Bubble Print 7-40. White or Blank Pages 7-41. High Voltage Power Supply Assembly Summary 7-42. High Voltage System Checks 7-43. Communications Checks 7-44. Duplex Paper Jam Troubleshooting 7-45. Duplex Assembly Malfunctions 7-46. Duplex Photosensors, Solenoids, Motors - HP LaserJet 4000 | Service Manual - Page 159
INTRODUCTION This chapter provides detailed troubleshooting guidelines for the LaserJet IIISi/4Si printers. The recommended approach is to begin with the "Pre-Troubleshooting" sections first. This may help diagnose and remedy the problem without need for going further. If necessary, use - HP LaserJet 4000 | Service Manual - Page 160
the specs detailed in The HP LaserJet Family Paper Specifications Guide (P/N 5002-1801). Printer Maintenance: Has the printer been cleaned and maintained on a regular basis as described in Chapter 4 of this manual? Is the printer due for User Maintenance? (Check page count.) 7-2 Troubleshooting: PRE - HP LaserJet 4000 | Service Manual - Page 161
as that produced by diazo copiers or office cleaning materials. ■ The printer is not exposed to direct sunlight at any time during the day. ■ Non-HP components are removed from the printer such as refilled toner cartridges, font cartridges, and memory boards. Troubleshooting: PRE-TROUBLESHOOTING 7-3 - HP LaserJet 4000 | Service Manual - Page 162
reduce print speed. ■ SHORT TONER CARTRIDGE LIFE u A new Hewlett-Packard toner cartridge is rated for 8,000 images at 5% coverage. If more than 5% coverage (such as complex graphics) are routinely printed, the cartridge may not print the full 8000 pages. u Paper with high surface abrasion (typical - HP LaserJet 4000 | Service Manual - Page 163
PROBLEMS u Thoroughly clean the printer per the instructions in Chapter 6 of the User's Reference Manual. u Verify that printer has been maintained properly according to Chapter 4. u Verify that the paper being used meets all specifications shown in The HP LaserJet Family Paper Specifications Guide - HP LaserJet 4000 | Service Manual - Page 164
. Try a xerographic bond paper per The HP LaserJet Family Paper Specifications Guide (P/N 5002-1801). u Verify that printer has been maintained properly according to Chapter 4. u The printer may need to be cleaned. Refer to Chapter 6 of the User's Reference Manual for instructions on cleaning the - HP LaserJet 4000 | Service Manual - Page 165
host. u Replace the MIO card. ■ 40 DATA TRANSFER ERROR u The printer is receiving data in an unrecognizable format, a common result of having powered down the host with the printer on-line. This is also caused by non-matching baud rates or host configuration other than an 8-bit, 1 start/stop bit, no - HP LaserJet 4000 | Service Manual - Page 166
Defective: - Toner Cartridge not recognized. - Dysfunctional photosensor(s). Can the prCinotenrtrpoel Prfoarnmela No Self-Test? Defective: - Formatter PCA - Control Panel/Cable Yes Confirms: - Entire printer functional, - Configuation, page count, installed options and memory are confirmed - HP LaserJet 4000 | Service Manual - Page 167
, error, warning, and service messages affecting the HP LaserJet IIISi/4Si printers. LaserJet IIISi or LaserJet 4Si are noted. If no notation is given, the message can apply to either printer. Note Use the Message Summary tables for basic summary error message troubleshooting. More detailed error - HP LaserJet 4000 | Service Manual - Page 168
in progress. Wait for the printer to display the 00 READY message_ 06 CONFIG PAGE (LaserJet 4Si) The configuration page is being formatted and printed. Wait for the printer to display the 00 READY message. 06 DEMO PAGE (LaserJet 4Si) The demonstration page is being formatted and printed. Wait - HP LaserJet 4000 | Service Manual - Page 169
. Close the printer and press g ia or On ink. to reprint the page. If the problem persists, refer to 3 PAPER JAM Message section. Error 13.4 may be caused by jams in the optional paper stacker. If these occur, paper will need to be cleared from the entire paper path. Troubleshooting: MESSAGE - HP LaserJet 4000 | Service Manual - Page 170
toner cartridge is almost depleted. At the "3" stage, the toner cartridge is almost completely empty. Replace the toner cartridge or if the error message is flashing, press (Continue) to place the message in the background. If the problem continues, refer to 16 TONER LOG! Message section. 17 MEMORY - HP LaserJet 4000 | Service Manual - Page 171
be replaced. , An error occurred during the transfer of data from the computer to the printer. To continue printing press Continue) Note: This error occurs if the computer is powered down while the printer is on-line or when attempting to use baud rates which do not match. Troubleshooting: MESSAGE - HP LaserJet 4000 | Service Manual - Page 172
41 ERROR 48 INVALID JOB (LaserJet IIISi) 49 REMOVE PAGE 50 SERVICE 51 ERROR 52 ERROR SYMPTOMS AND RECOMMENDATIONS A temporary error occurred in the printed page. If this error occurs, press the (Continue) key and the printer will repeat the page. If the error persists, refer to 41 ERROR checks - HP LaserJet 4000 | Service Manual - Page 173
-ZZ ERROR (LaserJet 4Si) 54 SERVICE Indicates an error on a RAM SIMM. Press the Want e) key to resume printing. If a SIMM module caused the error, the module will not be configured. The meanings of X, Y, and ZZ values are defined as follows: X - Hardware Type 0: ROM 1: RAM Y - Hardware Device 0: On - HP LaserJet 4000 | Service Manual - Page 174
error was detected in the Formatter PCAs internal font ROM. If the message persists, replace the Formatter PCA. Indicates a problem with memory. The x value is: 0 indicates internal memory, 1-4 indicates SIMM slots, and 5-6 indicates cartridges (upper and lower respectively). 7-16 Troubleshooting - HP LaserJet 4000 | Service Manual - Page 175
message becomes 6:3 READY/SERVICE to remind the operator of the problem. 68 SERVICE Indicates a defective NVRAM (requires replacement of the part). Power cycle the printer to clear this error. 70 ERROR. (LaserJet 4Si) The firmware cartridge cannot be executed. The cartridge is not designed for - HP LaserJet 4000 | Service Manual - Page 176
) MESSAGE 71 ERROR (LaserJet 4Si) 72 SERVICE (LaserJet 4Si) 79 SERVICE XXXX 80 SERVICE (LaserJet IIISi) 89 SERVICE (LaserJet IIISi) SYMPTOMS AND RECOMMENDATIONS An attempt was made to use a "personality" firmware cartridge. Personality cartridges are not supported on the LaserJet IIISi/4Si - HP LaserJet 4000 | Service Manual - Page 177
the indicated font. cartridge and install a known good cartridge. Power ON the printer. FE CARTRIDGE (LaserJet 4Si) The font cartridge was removed when the printer was on-line. Power cycle the printer to clear this error. FE FONT CART ERR (LaserJet IIISi) Troubleshooting: MESSAGE SUMMARIES 7-19 - HP LaserJet 4000 | Service Manual - Page 178
then re-insert the cartridge. Power ON the printer ME FEED [Envelope size] (LaserJet 4Si) A request has been received for an envelope to be manually fed. "Envelope size" may be one of the following: "COMIC), MONARC," or "DL". The message may be overridden and paper fed from the installed cassette - HP LaserJet 4000 | Service Manual - Page 179
available memory. The job was aborted and no page was printed. The job parameter of resolution and page protection could not be met with the available memory. The job was downgraded to a resolution of 300 dpi and page protect of OFF to fit the available memory. Troubleshooting: MESSAGE SUMMARIES - HP LaserJet 4000 | Service Manual - Page 180
of 300 dpi and page protect of A4 (A4) to fit the available memory. WM CHECK MEM MGT (LaserJet 4Si) There is still sufficient memory for environment saving but the current setting cannot be satisfied by available memory. Re-configure the extended memory for the current personality (using - HP LaserJet 4000 | Service Manual - Page 181
UP (continuous) Checks CHECKS ACTION 1. Are there host system interface problems? (LaserJet IIISi only.) 2. Is the Fusing Assembly defective? Disconnect the interface cable from the printer, power printer OFF, then ON. The problem may be caused by a parallel cable connected to a serial port - HP LaserJet 4000 | Service Manual - Page 182
the presence of the paper tray. The tray paper size other than what is loaded in the printer is called for by the user or software. The Paper Sensing Arms are located in the paper input areas of the printer. During normal operation, the Paper paper, the photo-interrupter attached to the Paper Sensor - HP LaserJet 4000 | Service Manual - Page 183
of either Paper Sensing Arm? Verify that the Sensing Arms swing through their full range of motion. 9. Are the lifter solenoids operational? I . Watch the tray move into position. 2. Replace the lifter. 3. Replace the Paper Feed PCA. 4. Replace the DC Controller. Troubleshooting: MESSAGE DETAILS - HP LaserJet 4000 | Service Manual - Page 184
Cassette. When the tray is inserted, the protrusions activate (engage) the microswitches (refer to Figure 7-2 below). Table 7-5. Configuration of Tray Size Sensing Switches Paper Tray Size Executive A4 Legal Letter No Tray Installed SW2301 ON ON OFF ON OFF SW2302 ON ON OFF OFF OFF SW2303 ON - HP LaserJet 4000 | Service Manual - Page 185
or replace the printer, check SW101. 6. Are the DC Power Supply connectors Visually inspect.. Reseat module if fully seated? necessary. 7. Is the DC Controller PCA defective? See the "+24B VDC Electrical Check". 8. Is SWI002/SW1003 actuated? See "14 NO TONER. CART" message. Troubleshooting - HP LaserJet 4000 | Service Manual - Page 186
V: Figure 7-3. PS1: Top Cover Closed Photosensor and Actuator Mechanism 7-28 Troubleshooting: MESSAGE DETAILS - HP LaserJet 4000 | Service Manual - Page 187
arrive at the sensor in the allotted time, the appropriate error message will be displayed. Note When troubleshooting paper jams, be sure to remove paper from the entire paper path, including any optional media accessories. When troubleshooting jams, it may also be helpful to defeat the top cover - HP LaserJet 4000 | Service Manual - Page 188
. 1 s I i- (....P..S,151 - =8-i-5;' , S PPS32 Q .L3,5 " 1. e5 ,;.,'', A r OM. Figure 7-4. Paper Motion Sensors 7-30 Troubleshooting: MESSAGE DETAILS - HP LaserJet 4000 | Service Manual - Page 189
Block Assembly. ■ 13.2 INPUT JAM. A paper jam is detected at the input section of the printer. This could be PS2 (Refeed Sensor), or PS371 (Manual Feed Sensor) if the envelope feeder is installed. PS2 (Paper Refeed Sensor) can also detect a 13.1 paper jam when the printer is operating in the Duplex - HP LaserJet 4000 | Service Manual - Page 190
printer. Dirt in the paper path will inhibit free movement of paper through the printer. • Remove the Duplex Assembly if one is installed. This will help to isolate the source of the problem. If paper jams are a result of a defective Duplex Assembly, replace the Duplex Assembly. 7-32 Troubleshooting - HP LaserJet 4000 | Service Manual - Page 191
causing the problem. Input Area Paper Jams a If paper does not leave the cassette properly check the Pickup and Separation Rollers for wear. Check that the lift mechanism is functioning properly. ■ Check that the media is supported as described in the LaserJet Family Paper Specification Guide (5002 - HP LaserJet 4000 | Service Manual - Page 192
If the printer runs in continuous Duplex Mode when Duplex is not selected, check for toner build up at the exit of the Fusing Assembly. Replace the fuser if necessary, and perform the solenoid checks as described in the next section. Face-up/Face-down and Duplex Diverter Paper Jams Paper jams at the - HP LaserJet 4000 | Service Manual - Page 193
the bin is empty. Check the cabling to the Job Offset Assembly. Replace the Job Offset Assembly if the problem persists. Duplex Assembly Paper Jams Most paper jams in the Duplex Assembly require that the Duplex Assembly be replaced. Before replacing the Duplex Assembly, remove the Duplexer and test - HP LaserJet 4000 | Service Manual - Page 194
if necessary. printer? 2. Is there at least one sensitivity tab on the right side of the toner cartridge? Visually inspect. The toner cartridge must have at least one sensitivity tab on the right side of the cartridge. If the cartridge has no tab, replace the toner cartridge. 3. Is the tab - HP LaserJet 4000 | Service Manual - Page 195
replace the DC Controller. 1. Open the printer's Top Cover Assembly. 2. Note the position of the drum sensitivity tab on the right side of the toner cartridge (if no tab is present, replace the cartridge switch actuator as a temporary fix to finish the print job. Troubleshooting: MESSAGE DETAILS 7-37 - HP LaserJet 4000 | Service Manual - Page 196
? Replace the toner cartridge if visibly damaged. 6. Is the DC Controller PCA defective? See the "Toner Low Functional Check" following this table. 7. Is the High Voltage Power Supply Assembly defective? See the "Toner Low Functional Check" following this table. 7-38 Troubleshooting: MESSAGE - HP LaserJet 4000 | Service Manual - Page 197
system is malfunctioning (i.e., the warning message is constantly being displayed or is never displayed), replace the following components in the order listed: 1. Try a known good toner cartridge. 2. DC Controller PCA. 3. High Voltage Power Supply Assembly. (.......,c, EP Drum Ground Developing Bias - HP LaserJet 4000 | Service Manual - Page 198
detect problem. The 41 ERROR is displayed when the beam is "lost" for less than 2 seconds. An error condition of greater than 2 seconds will result in a 51 ERROR message. See the 51 ERROR Message section for a discussion of the 41 ERROR message condition. "50 SERVICE" Fuser Malfunction Warning - HP LaserJet 4000 | Service Manual - Page 199
, replace the Cable from the DC Sensor PCA to the DC Controller. 4. Check connector J201 on the Sensor Reseal the connector. PCA. 5. Is the fuser enable switch (SW101) Open the Top Cover and verify that the engaged when the Top Cover is closed? 12 OPEN message is displayed. Troubleshooting - HP LaserJet 4000 | Service Manual - Page 200
"41/51 ERROR" Message Two displays, 41 ERROR and 51 ERROR, indicate a laser beam detect problem. The 41 ERROR is displayed when the beam is "lost" for less than 2 seconds. An error condition of greater than 2 seconds will result in a 51 ERROR message. A 41 ERROR (temporary Beam Detect Error) may - HP LaserJet 4000 | Service Manual - Page 201
harness assembly if damage is suspected. 7. Is the Laser Unit defective? Replace the Laser/Scanner Assembly. If the error persists, replace the DC Controller PCA. Note Nur The Laser Power Checker tool is not supported for use on the LaserJet 4Si printer. Troubleshooting: MESSAGE DETAILS 7-43 - HP LaserJet 4000 | Service Manual - Page 202
ERROR is enabled briefly when the printer is powered ON (during the printer's power ON self test) on the Laser/Scanner Assembly. If the problem persists, do the following: While performing 003 does not illuminate during the engine test print, replace the following assemblies in the order listed: 1. - HP LaserJet 4000 | Service Manual - Page 203
page. "53 SERVICE" Laser Malfunction The "53 Service" message indicates a laser malfunction. Power cycle the printer to clear this error. If the error persists, continue troubleshooting Power Checker tool is not supported for use on the LaserJet 4Si printer. Troubleshooting: MESSAGE DETAILS 7-45 - HP LaserJet 4000 | Service Manual - Page 204
is not present, replace the Duplex Driver PCA, the DC Controller or the Cable Assembly in that order. See the "Duplex Assembly Troubleshooting" section for information on the Duplex Assembly components. "55 SERVICE" Initialization Error The "55 Service" error indicates that the printer failed to - HP LaserJet 4000 | Service Manual - Page 205
the voltage at J111, (the envelope feeder connection) pin 6 is shorted to frame ground. To troubleshoot this problem: 1. Disable the Duplex function. 2. Remove the envelope feeder from the printer, and restart the printer. 3. Determine what is holding the signal at J111 pin 6 at a low state. "57 - HP LaserJet 4000 | Service Manual - Page 206
The Main Motor. If the 24VDC is missing from J010, pin 14 replace the DC Power Supply PCA. Note If the printer does not perform an Engine Test, ensure that manual feed has not been selected (it should be set to OFF) and that the fuser is warmed up (00 READY). 7-48 Troubleshooting: MESSAGE DETAILS - HP LaserJet 4000 | Service Manual - Page 207
Guide to determine if the minimum requirements for PostScript operation have been met. Verify that any SIMM cards are installed and seated properly. If the 59 ADD MEMORY persists, run the extended diagnostic tests as described in this chapter to determine which components to replace. Troubleshooting - HP LaserJet 4000 | Service Manual - Page 208
sometimes result in a 50 SERVICE error. Allow the printer to cool for twenty minutes, remove the Right Rear Cover, and reset the green circuit breaker button through the square access hole above the AC Power Inlet receptacle. • Defective Formatter PCA. Replace. 7-50 Troubleshooting: BLANK DISPLAY - HP LaserJet 4000 | Service Manual - Page 209
power cycle the printer after each step: 1. Remove any I/0 cables to the host. 2. Reseat the Control Panel Cable. 3. Replace the Control Panel Cable. 4. Replace the Control Panel. 5. Replace the Formatter PCA. 6. Replace the DC Controller PCA. 7. Replace the DC Power Supply. Troubleshooting: BLANK - HP LaserJet 4000 | Service Manual - Page 210
Then push down on either of the two toner cartridge sensitivity switches (see Figure 7-8, callout 2). The printer will begin to warm up, as it fuser light comes on. At this point there should be a 13.X PAPEF: JAM error message. This test does not work from the lower paper tray. 7-52 Troubleshooting - HP LaserJet 4000 | Service Manual - Page 211
IN I is AO a 1 - 7. NO Pi! g Figure 7-7. Defeating SW101 Actuator. 1 ,; Figure 7-0. Defeating PS1 Sensor. Troubleshooting: DEFEATING TOP COVER 7-53 - HP LaserJet 4000 | Service Manual - Page 212
AIDS TO TROUBLESHOOTING This section describes helpful tools such as component diagrams, Service Mode, and Extended Diagnostics Printer Component Table Table 7-13. PRINTER COMPONENT TABLE Symbol PM I FM1 FM2 FM3 H1 TH1 TP1 PSI PS2 PS3 PS6 PS7 PS8 SLI SL2 SL3 Name., Function Paper Pickup Motor - HP LaserJet 4000 | Service Manual - Page 213
411 7P1 FM2 SL1 SL2 ( PS372 PS373 PS371 PS382 M1 PS383 PS381 SL OF1 "sua PS8 PS7 SL9 SL8 SL7 PSIdi SW101 Pr; ..4(t01SW 002 SW 003 SW' SW 0041 Test print switch Figure 7-9. Location of Sensors, Solenoids, Switches and Fans Troubleshooting: AIDS 7-55 - HP LaserJet 4000 | Service Manual - Page 214
J22•0•,8..''''' ''s. TO DUPLEX ( J2401 J 20 Je°1J2001 ft-J5 48 J2 0 201 J203 J202 4001 J002 J1 J4 J012 J9 J11 J13-16 JS J10 LaserJet 4Si Formatter J5 J12 J8 J7 Figure 7-10. Location of Connectors 7-56 Troubleshooting: AIDS - HP LaserJet 4000 | Service Manual - Page 215
PC Board Components Formatter PCA (LaserJet 4Si) J11 Font Cartridge Slots TU41 U32 J16 J15 tf) J14 J10 memory SIMMs. J5 - J6 Lower (35) and Upper (J6) Pont Cartridge slots. J11 Control Panel connector. J8 - J9 M1O1 (J8) and MIO2 (39) connectors. J12 Built-in Parallel I/O. Troubleshooting - HP LaserJet 4000 | Service Manual - Page 216
PCA. J4-1 is +5V, J5-1 and J5-2 are +24V "A" and "B." .17 To FM2 (DC Controller and DC Power Supply cooling fan). .17-1 is +24V. 7-58 Troubleshooting: AIDS - HP LaserJet 4000 | Service Manual - Page 217
the presence/absence of paper in the upper cassette. PS 381 Detects the position of the lower lifter. PS 382 Detects Paper Pickup from the lower manual feed port. PS 383 Detects the presence/absence of paper in the lower cassette. SL 301 Sets the Pickup Roller. Troubleshooting: AIDS 7-59 - HP LaserJet 4000 | Service Manual - Page 218
J014 SW001 J004 J005 SW003 SW002 GND J 006 • CP029 • Main Motor CP028 up +24VA to speed J007 J019 J012 Fuser Discharge • CP005 J013 J011 LED004 +24VB • CP023 J018 J010 J008 • CP031 +5V J009 Figure 7-14, DC Controller PCA Components - LaserJet IllSi 7-60 Troubleshooting: AIDS - HP LaserJet 4000 | Service Manual - Page 219
PCA 002 J1001 (BD) J1004 J1005 0 CP1005 •Fuser Discharge LED 1003 Laser up-to-speed LED 1004 s e Main Motor up-to-speed §1- CP1029 GND CP1031 +5V • • 0 CP1028 0 0 +24V 7) J1013 J[110.111 J1018 J1010 Figure 7-15. DC Controller PCA Components - LaserJet 4Si Troubleshooting: AIDS 7-61 - HP LaserJet 4000 | Service Manual - Page 220
Table 7-17. LEDs on the DC Controller LaserJet lllSi/4Si LED (111Si/4Si) Fill:led= 003/1003 Lights when the J14, pin 5 when the Top Cover is CLOSED. Note Immediately recover from the ERROR 50 failure by shorting test point CP005 (on the DC Controller) to ground. 7-62 Troubleshooting: AIDS - HP LaserJet 4000 | Service Manual - Page 221
Table 7-19. AC Driver PCA Components Component - AM= PS 151 Detects paper in the Fusing Assembly. SW 101 This switch opens when the Top Cover is opened and disables the 24B voltage. The 24B voltage powers the Scanner Assembly, the Main Motor and the fuser. Troubleshooting: AIDS 7-63 - HP LaserJet 4000 | Service Manual - Page 222
High Voltage Power Supply PCA VR801 VR802 TB801 J802 J803 TB803 0 J801 J805 J806 Figure 7-17. High Voltage Power Supply PCA Components Table 7-20. High Voltage Power Supply PCA Components Component Function VR801 Print Density Adjustment 7-64 Troubleshooting: AIDS - HP LaserJet 4000 | Service Manual - Page 223
Voltage Test Points You can quickly verify the voltages on the printer by: 1. Listening for the fans. Running fans indicate that the +5VDC and the + 24AVDC voltages are present. voltages are available at test points on the DC Controller (see Figure 7-14 and Figure 7-15). Troubleshooting: AIDS 7-65 - HP LaserJet 4000 | Service Manual - Page 224
Formatter Service Configuration Troubleshooting problems that require voltage tests can only be done with the Formatter Pan removed from the printer. To remove the pan from the printer, remove the Formatter Pan Cover, the Formatter Pan, and the Front Panel Assembly. Remove the tie-wraps that hold - HP LaserJet 4000 | Service Manual - Page 225
Reset clears all data from the print buffer, and returns the Printing Menu and the Configuration Menu to the Factory Default Settings. To perform a Cold Reset, press the Con Linej key while powering ON the printer. The Cold Reset is complete when the display reads 00 REFiDY. A Cold Reset will not - HP LaserJet 4000 | Service Manual - Page 226
retains the latest fifty entries in its Error Log. These errors are limited to service errors (50-89) and paper jam entries. Perform the following steps to access the Error Log: LaserJet IllSi 1. Hold down the CForm Feed) key while powering ON the printer. ERROR LOG moDE will be displayed after the - HP LaserJet 4000 | Service Manual - Page 227
. Table 7-21. Understanding the Error Log Message Code ERROR NUMBER ERROR TYPE SUB-ERROR PAGE COUNT 01 50 0001 000561 02 54 0001 000320 This code is displayed on the screen as 01 5000C-11 0010156,1. The order of information is the same as shown in the table. Troubleshooting: AIDS 7-69 - HP LaserJet 4000 | Service Manual - Page 228
. The Service Mode is useful for: • Viewing and setting the page count. ■ Viewing and setting the maintenance count. ■ Viewing and setting the serial number. • Initiating a Chart A printout (LaserJet IIISi only). Note When a defective Formatter is replaced, note the page count, maintenance count - HP LaserJet 4000 | Service Manual - Page 229
* Enter J Enter (+ Power-ON) SERVICE MODE Menu SERVICE MENU * Item PAGES.xxxxxn Item 1MA NT=mcax * Item ) lootisaionoii Figure 7-19. Service Mode Menu Map ERR LOG Item Enter PRT ERR LOG Enter Item Prints Clit ERRLOG.YES* (NO) error log. Data in log? NO ERR LOG EMPTY YES (error list) cn r - HP LaserJet 4000 | Service Manual - Page 230
under the heading "Clearing the Service Message," later in this chapter). When the Formatter PCA is replaced, set the page count and serial number to match that of the original Formatter and set the maintenance count to reflect the useful life of the consumable parts. Use the following procedure to - HP LaserJet 4000 | Service Manual - Page 231
the selection, and press I to continue ((menu) on LaserJet IIISi). 7. When the maintenance count has been set, the printer will display Again, use the procedure described above to set the serial number in the printer memory. 8. To exit the Service Mode press either the (On Liele) key or the - HP LaserJet 4000 | Service Manual - Page 232
to return the printer to its operating condition 32:2 1:1 2:63:5 2:4 1:34:43:32:2 1:1 :'.417jEMINIE• 2:6 3:5 2:4 1:34:43:32:2 1:1 BLVIIIM• 2:63:5 2:4 1:34:43:32:2 1:1 111III III 2:6 3:5 2:4 1:34:4 3:3 2:2 1:1 E.A.JEMIIIM• Figure 7-20. Sample of Service Mode (Chart A) Self test 7-74 Troubleshooting - HP LaserJet 4000 | Service Manual - Page 233
printer has printed 200,000 pages. Before clearing this message, perform the maintenance tasks described in Chapter 4, Printer Maintenance. To clear the USER MFi I NTENFiNCE message and reset the maintenance count to zero: 1. Take the printer off-line and enter the Configuration Menu: LaserJet - HP LaserJet 4000 | Service Manual - Page 234
When the LaserJet 4Si printer is in Service Mode, there is a menu item Sk:IP DEMO=. This option has been included to allow locking out the demonstration page printout for printers which HP might OEM to other manufacturers. This item should always be set to FALSE for HP LaserJet 4Si printers. If the - HP LaserJet 4000 | Service Manual - Page 235
Extended Diagnostic Tests Hewlett-Packard provides a tool to more effectively troubleshoot problems in the printer's electronic assemblies. Refer to Figure 7-22 (LaserJet IIISi) or Figure 7-21 (LaserJet 4Si) for an overview of the extended diagnostics menu items. One mode of operation is dedicated - HP LaserJet 4000 | Service Manual - Page 236
warmed up and that the upper paper tray is full. Check for paper jams. Check for a print engine failure. Check the error log and the service messages. If there is no indication of an engine failure, (service messages 50-59), replace the Formatter. Otherwise, troubleshoot the engine failure. 7-78 - HP LaserJet 4000 | Service Manual - Page 237
Continua After Message indicates choice has been saved Default choices are SHADED, when neither choice is SHADED the Default depends on Printer Configuration (Print Fonts) - Runs the Extended Diagnostics tests (Ready light will flash until tests are complete) (Continue) - Takes you back to the - HP LaserJet 4000 | Service Manual - Page 238
c rn a) ra2co.-t) Item ==rn. aC2). Cco- -1a:0 MIOU Opt--Y (N) fa) * Item 0 0 SIMM DRAMY* (N) (I) Item SOIV :6ugootisalcinoal Figure 7-22. LaserJet 4Si Extended Diagnostics Flowchart Legend: This box represents a r This box represents the control panel display area. An asterisk denotes the - HP LaserJet 4000 | Service Manual - Page 239
on LaserJet IIISi), and the green READY LED will be illuminated. Note If the Front Panel continues to read ACCESSING MIO instead of EXTENDED DIAG, and the green READY LED is not blinking, the processor is unable to access the MIO card. Replace the MIO card and continue the test. Troubleshooting - HP LaserJet 4000 | Service Manual - Page 240
LaserJet IIISi). Various test messages will appear on the screen and the green READY LED will flash while the tests are running. During the tests two sheets of paper will be fed through the printer and the yellow manual LED will be continuously the CD or 0 key. LaserJet 4Si. When the display reads - HP LaserJet 4000 | Service Manual - Page 241
PC with a Bitronics port and appropriate software must be connected to the built-in parallel port of the LaserJet 4Si printer test exercises the MIO communications. The LaserJet 4Si allows selection of upper (MIO2 This means that the printer does not detect the presence of extended memory in the SIMM - HP LaserJet 4000 | Service Manual - Page 242
detected in the test loop. The failure is recorded in the fault log and the yellow MANUAL LED is illuminated to indicate that a failure message is available. Other options available by pressing Mode and reset the printer to its operating condition, power cycle the printer. 7-84 Troubleshooting: AIDS - HP LaserJet 4000 | Service Manual - Page 243
meets all specifications (see The HP LaserJet Family Paper Specifications Guide (P/N 5002-1801)). In addition, be certain that the toner cartridge being used is a genuine HP cartridge. ■ Use the half self test functional check in section "Image Formation Troubleshooting" to help isolate the cause - HP LaserJet 4000 | Service Manual - Page 244
Black Pages (Table 7-23) N Very Faint Print (Table 7-24) Faulty Registration (Table 7-25) Vertical Detects (Table 7-30) •; • of ,. • Smeared Print/ Improper Fusing (Table 7-31) Distorted Print (Table 7-32) Figure 7-23. Image Defect Samples (1 of 2) 7-86 Troubleshooting: PRINT QUALITY DEFECT - HP LaserJet 4000 | Service Manual - Page 245
(Table 7-36) Image Skew (Table 7-3,1) • • 9 Improperly Sized Image (Table 7-36) Large Print Voids (Table 7-37) Background (Table 7-38) Bubble Print (Table 7-Z9) N White or Blank Pages (Table 7-40) Figure 7-24. Image Defect Samples (2 of 2) Troubleshooting: PRINT QUALITY DEFECT 7-87 - HP LaserJet 4000 | Service Manual - Page 246
because of the erase lamps, the drum's surface would be neutral, attracting the less-negatively-charged toner and, therefore, creating a totally black image. Replace the toner cartridge. 2. Scanner Cable Assembly (defined border). Low-level signals exchanged between the Laser/Scanner Assembly and - HP LaserJet 4000 | Service Manual - Page 247
Any Faint Print Condition POSSIBLE CAUSE ACTION 1. Toner cartridge No toner available for printing. Replace the toner cartridge. 2. Print density set improperly. The higher the print density setting (more toward the thick part of the scale), the more toner that is transferred to the drum. Set - HP LaserJet 4000 | Service Manual - Page 248
the printer. Switch trays to verify that the problem follows the tray. Replace the paper tray. 6. Duplex Assembly. If the problem occurs in Duplex Mode, replace the Duplex Assembly to isolate the cause. Replace the Duplex Assembly if the problem is caused by the Duplexer. 7-90 Troubleshooting - HP LaserJet 4000 | Service Manual - Page 249
for print. Replace the toner cartridge. 2. Beam-to-drum mirror incorrectly installed. The beam-to-drum mirror reflects the laser light from the scanner's mirror to the photoconductive drum. If the mirror is installed incorrectly (end-for-end) or is not resting on the mirror supports, the scan - HP LaserJet 4000 | Service Manual - Page 250
and humidity conditions may develop this problem. Replace the toner cartridge. If the printer is installed in a hot or humid location, advise the customer to move the printer to a more suitable location. Refer to the User's Reference Manual for environmental specifications. Table 7-29. Random - HP LaserJet 4000 | Service Manual - Page 251
the HVPS. If the problem persists, replace the DC Controller. 5. Transfer Roller bad or dirty Replace the Transfer Roller. Repetitive Defect Templates Repetitive print defects are usually associated with a specific roller within the printer or the toner cartridge. The following templates are - HP LaserJet 4000 | Service Manual - Page 252
Width Rollers First Occurrence 38mm (1.5") Primary Charging Roller 44mm (1.7") Upper Registration Roller 50mm (2.0") Developer Roller 63mm (2.5") Transfer Roller 94mm (3.7") Fuser Roller or Toner Cartridge Drum Figure 7-25. Vertical Repetitive Defect Ruler 7-94 Troubleshooting: PRINT QUALITY DEFECT - HP LaserJet 4000 | Service Manual - Page 253
Troubleshooting: PRINT QUALITY DEFECT Figure 7-26. Horizontal Repetitive Detect Ruler TEMPLATE DEFECTS RELATING TO FUSER ASSEMBLY Lower Output Fuser Roller Upper Output Fuser Roller I PRINT DIRECTION I I Fuser Separation Pawls I I f I I I 1 I I Input Cowling (Underside of Black Plastic Top - HP LaserJet 4000 | Service Manual - Page 254
Troubleshooting: PRINT QUALITY DEFECT Figure 7-27. Horizontal Repetitive Defect Ruler TEMPLATE DEFECTS RELATED TO THE LOWER REGISTRATION ROLLER (4si) Lower Registration Roller (IIISi) • Lower Registration Roller ( - HP LaserJet 4000 | Service Manual - Page 255
Troubleshooting: PRINT QUALITY DEFECT Figure 7-28. Horizontal Repetitive Defect Ruler II ■ V tD V TEMPLATE DEFECTS RELATING TO FACE DOWN ASSEMBLY Duplex Down Deflector Claws II I II I I Upper - HP LaserJet 4000 | Service Manual - Page 256
new toner cartridge. surface of the paper. Table 7-32. Distorted Print POSSIBLE CAUSE 1. Paper Path. If any component within the Closely examine the Paper paper path is preventing the paper from Transport Rollers along the paper moving at a uniform rate, the print image path for wear. Replace - HP LaserJet 4000 | Service Manual - Page 257
with a 51 ERROR. Ensure the fiber-optic cable is properly seated. If the error persists, replace the fiber-optic cable. 2. Laser/Scanner Assembly or DC Controller PCA. Replace the Laser/Scanner Assembly followed by the DC Controller PCA, if necessary. Troubleshooting: PRINT QUALITY DEFECT - HP LaserJet 4000 | Service Manual - Page 258
Assembly. If the problem occurs in Duplex Mode, replace the Duplex Assembly to isolate the cause. CATEGORY Skew Leading Edge Left Margin Paper Registration Specs 1.5 mm / 26 cm length 5± 2.5 mm 5± 2.5 mm DUPLEX SPEC 2.0 mm / 6 cm length 5± 2.5 mm 5± 3.0 mm 7-100 Troubleshooting: PRINT QUALITY - HP LaserJet 4000 | Service Manual - Page 259
characteristics. Replace the toner cartridge, 3. Incompatible media. During media manufacture, inks or other finishing processes may interfere with the electrophotographic or fusing process. Change type of media. 4. Old toner cartridge. Change the toner cartridge. Troubleshooting: PRINT - HP LaserJet 4000 | Service Manual - Page 260
1. Bad transparencies. Transparencies will Use Hewlett-Packard approved exhibit this problem if they are not designed transparencies (refer to the for proper toner adhesion. LaserJet Family Paper Specification Guide (5002-1801). 2. Bad paper lot. The surface of the paper may be too smooth for - HP LaserJet 4000 | Service Manual - Page 261
. Bubble Print POSSIBLE CAUSE 1. Defective toner cartridge. ACTION Install a new or known good toner cartridge. 2. The electrophotographic (EP) drum connector on the toner .:artridge. If the problem persists, replace the High Voltage Power Supply. Troubleshooting: PRINT QUALITY DEFECT 7-103 - HP LaserJet 4000 | Service Manual - Page 262
or Blank Pages POSSIBLE CAUSE ACTION 1. Toner cartridge. No toner is available for Remove sealing tape or replace the print. toner cartridge. 2. No Transfer Roller voltage. Without Transfer Charge Roller voltage, toner cannot be attracted from the surface of the drurn to the paper. Perform - HP LaserJet 4000 | Service Manual - Page 263
. 3. Open the toner cartridge's drum shield to view the drum's surface. If a dark and distinct toner image is present on the drum's surface, assume that the first four functions of the electrophotographic process are functioning, and concentrate troubleshooting efforts to a transfer problem. If NO - HP LaserJet 4000 | Service Manual - Page 264
drum is rotating, proceed as follows: 1. Open the printer's Top Cover Assembly. Open the toner cartridge's drum shield (cover) to view the photoconductive drum. replacement. High Voltage Power Supply Assembly The High Voltage Power Supply Assembly provides the necessary voltages for the printer's - HP LaserJet 4000 | Service Manual - Page 265
Deposits a positive charge to the back of the paper to attract the negatively charged toner from the drum's surface. 4. Toner Sensing. Provides a variable voltage level to the DC Controller, depending on the toner level in the toner cartridge. 5. Static Teeth. A high negative potential is applied - HP LaserJet 4000 | Service Manual - Page 266
? Remove the Bottom Cover and visually inspeCt the connectors. Reseat or replace if necessary. 6. Do the toner cartridge's sensitivity Refer to the "Drum Sensitivity Switches switches function? (SW1002 and SW1003) Functional Check" in Section 7-2. 7-108 Troubleshooting: IMAGE FORMATION - HP LaserJet 4000 | Service Manual - Page 267
INTERFACE TROUBLESHOOTING Communications Check Note Communication problems are normally the customer's responsibility. Time spent attempting to resolve these problems may not be covered by the product's Hewlett-Packard warranty. HP's Customer Service Center (CSC) is available to the customer at - HP LaserJet 4000 | Service Manual - Page 268
above statements. Configure the printer for RS-232 at 9600 baud. Install it to the C0M2 (or COM1) port on the PC using the appropriate cable and repeat the test message procedure above. See the pamphlet, Your Guide to Setting up Your LaserJet Si, for the appropriate cable. If the problem persists - HP LaserJet 4000 | Service Manual - Page 269
configured to the parameters described in the configuration instructions? These parameters are required to communicate with the printer. Verify the computer's communications port configuration set in any configuration files. Note: A baud rate problem may also yield a printer 40 ERROR. 3. Are you - HP LaserJet 4000 | Service Manual - Page 270
the problem. Caution HP LaserJet printers are not designed to work with mechanical switch-box products that don't have proper surge protection. These devices can generate high transient voltages that will cause permanent damage to the Formatter PCA. This circumstance is not covered by the Hewlett - HP LaserJet 4000 | Service Manual - Page 271
guidance on problems associated with the Duplex Assembly. Table 7.44. Duplex Paper Jam Troubleshooting POSSIBLE CAUSE CHECK ACTION Duplex D-Roller not turning Look through the Duplex Side Cover to check the Duplex Feed Roller. Replace the solenoid, (SL5), then replace the Duplex Driver PCA - HP LaserJet 4000 | Service Manual - Page 272
DC Power Supply, Remove the Duplex Unit from the Duplex Driver PCA, or printer. Check that JO11, pin 1, cable. has +24VDC to frame ground. If it does, replace the DC Controller or cable. If it does not, replace the Power Supply. Switchback Motor failure 1. J403 disconnected. 1. Reseat J403 - HP LaserJet 4000 | Service Manual - Page 273
Feed Roller. Horizontal Registration Guide Motor PM2 Drives the Horizontal Registration Guide. Switchback Roller Motor PM3 Drives the Switchback Roller. Duplex Driver PCA PCB1 Operates the motors, solenoids and sensors. 1 On the Duplex Driver PCA. Troubleshooting: DUPLEX ASSEMBLY 7-115 - HP LaserJet 4000 | Service Manual - Page 274
(P1\42) Switchback Motor (PM3) Sensors (PS401, PS402) Duplex D-Roller Solenoid (SL5) Mother connector to printer Connector to PS4 Connector to PSS J2401 TO THE PRINTER J2403 J406 J401 J404 J402 J403 J2402 Figure 7-30. Location of Duplex Assembly Connectors 7-116 Troubleshooting: DUPLEX ASSEMBLY - HP LaserJet 4000 | Service Manual - Page 275
* 3 TMDOE1* 4 DEM' 5 .12VC1•11( 6 MAC' / GND 6 HvIEX.:' 9 .5V 10 HVTCHK1 NC NOTES: 24VA ALWAYS ACTIVE MB INACTIVE WHEN TOP COVER IS OPEN LOW ASSERTED TTL LOGIC PERMANENT CONNECTION 12 TVA' A CONTACT INTERFACE TONER CARTRIDGE (-) PRIMARY ROLLER EP SCANNER MIRROR (6-SIDEDI O 5 SCANNER MOTOR J70 - HP LaserJet 4000 | Service Manual - Page 276
Driver -10 Toner Cartridge Sensitivity Switch 2 power level Reset Fuser Error High Voltage Primary AC Scanner Status 0 Scanner Status 1 High Voltage Transfer Drive Set Point 0 High Voltage Transfer Drive Set Point 1 Photodetect Monitor No Connect No Connect Fuser Thermistor FUNCTION 24 Volts A Paper - HP LaserJet 4000 | Service Manual - Page 277
USE THE PARTS LISTS LaserJet IIISi vs LaserJet 4Si Parts Standard vs. Special Order Parts Using the Parts Index Ordering Printer Accessories COMMON HARDWARE PARTS LISTS ACCESSORY PARTS Duplex Assembly Interfaces and LAN Network Cards Standard Dual Serial/Centronics MIO Recommended Memory Authentic - HP LaserJet 4000 | Service Manual - Page 278
Components (Figure 3 of 3) 8-9. Control Panel Assembly 8-10. Paper Input Unit (Figure 1 of 2) 8-11. Paper Input Unit (Figure 2 of 2) 8-12. Lifter of 2) 8-18b. Fusing Assembly (2 of 2) 8-19. Cassette Assembly 8-20. Paper Refeed Assembly 8-21. Fan Assembly (FM2) 8-22. Hinge Assembly 8-23. Right - HP LaserJet 4000 | Service Manual - Page 279
8-26. LaserJet IIISi Supported MIO Configurations 8-27. LaserJet 4Si Supported MIO Configurations . 8-28. Recommended Memory 8-29. Miscellaneous Accessories 8-5 8-7 8-9 8-11 8-13 8-15 8-17 8-19 8-21 8-22 8-23 8-24 8-25 8-26 8-27 8-28 8-29 8-31 8-32 8-33 8-34 8-35 8-36 8-37 8-38 8-39 8-39 8-41 8-43 - HP LaserJet 4000 | Service Manual - Page 280
to the LaserJet 4Si add the notation "(4Si)." If there is no notation, that part is interchangeable for both printers. Standard vs. Special Order Parts Part numbers with no indicator in the Notes column are stocked and can be ordered through Hewlett-Packard's Support Materials Organization - HP LaserJet 4000 | Service Manual - Page 281
sorted by part name. All field-replaceable part numbers are listed there with cross-reference to the appropriate tables in this section. Use the Parts Index as a convenient means to find any part in the illustrations by its part number or name. Ordering Printer Accessories "Accessory Parts," toward - HP LaserJet 4000 | Service Manual - Page 282
COMMON HARDWARE Table 8-0 identifies common hardware used in the printers: EXAMPLE ' ----;:- 0 \.,..r, 1 MD 1, I Table 8-0. Common Hardware DESCRIPTION PART NUMBER Plated (silver-colored) washer-head Phillips machine screw. M3x8 - XA9-0267-000CN M3x4 - XA9-0434-000CN M3x6 - 0515-2186 M4x8 - HP LaserJet 4000 | Service Manual - Page 283
0 , 0 t, 3 3 Left Main Block Assembly Cassette 1 i Toner Cartridge . ; ,, 0 ..' ! - , .° • 10 Main Motor 11 PCA Assembly 9 Main Motor Drive Assembly 8 Paper Reteed Assembly „,---c--T-, / 1 r 5 Paper Input Unit Figure 8-1. Major Assemblies (1 of 2) 8-4 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 284
Registration Roller Assembly RG5-0025-220CN 5 Fig 8-10 Paper Input Unit RG5-0056-000CN 8 Fig 8-20 Paper Refeed Unit RG5-0040-000CN 9 Fig 8-14 Drive Assembly (Main Motor) RG5-0042-000CN 10 Fig 8-6 Main Motor PCA 92291A 11 Fig 8-1 Toner Cartridge (Table 8-29) Parts & Diagrams: PARTS LISTS 8-5 - HP LaserJet 4000 | Service Manual - Page 285
Sensor PCA 19 AC Power Supply 13 Main Switch Assembly 21 DC Power Supply 23 MIO Interface Card 14 Formatter PCA Figure 8-2. Major Assemblies (2 of 2) 8-6 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 286
Table 8-2. Major Assemblies (2 of 2) Part # .11 4* NOTE 33491-60143 10 Fig. 8-8 Formatter/Pan Assy (IIISi) (new)1 33491-69143 10 Fig. 8-8 Formatter/Pan Assy (IIISi) (exchange)1 33491-60160 10 Fig. 8-8 Formatter/Pan Assy (IIISi) (new)2 33491-69160 10 Fig. 8-8 Formatter/Pan Assy (IIISi) ( - HP LaserJet 4000 | Service Manual - Page 287
®. 10 (J11) r.y~ 3A 1 it Figure 8-3. Covers and Panels 8-8 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 288
Tabie 8-3. External Covers Part # REF NOTES DESCRIPTXON RG5-0120-000CN 1 Front Cover RB1-0823-000CN 5 RB1-0824-000CN 6 RB1-0825-000CN 7 RB1-0832-000CN 9 RG5-0107-000CN 10 RG5-0156-000CN 10 Cover, Right Side Cover, Right Rear Cover, Rear Lower Cover, Front Feeder Brush, Cleaning Cable, Front - HP LaserJet 4000 | Service Manual - Page 289
14 13 17 15 P88 Ji 5 rj 10 a A 3 4 Figure 8-4. Top Cover Assembly (Figure 1 of 2) 8.10 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 290
S Guide, Cartridge RB1-0472-000CN 2 S Guide, Upper Delivery RB1-0477-000CN 3 S Spring, leaf RB1-0478-000CN 4 S Spring, Leaf RB1-0482-000CN 5 S Catch RBI-0582-000ON 7 S Plate, Arm RF5-0096-000CN 8 S Spring, leaf RB1-0485-000CN 9 S Mount, Paper Holder RF5-0098-000CN 10 S Bar - HP LaserJet 4000 | Service Manual - Page 291
J 16 311 48 '1-- al s Figure 8-5. Top Cover Assembly (Figure 2 of 2) 8-12 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 292
Table 8-5. Top Cover Assembly (2 of 2) Part. # REF NOTES DESCRIPTION RBI-0484-000CN 6 5 Cable, guide liG5-0073-000CN 16 ti 'Fray Assembly I1R1 - 0565-000CN 3(1 Flapper 14G5-0067-000CN 48 Delivery Cover Assembly QTY 1 1 1 1 Parts & Diagrams: PARTS LISTS 8-13 - HP LaserJet 4000 | Service Manual - Page 293
11 Ca -13 14 (J1011) 12 9 te It (J1004) 7 thQ a cso 2003)7_,c(Jc70o1r)egi(J1010) [ (P63) 10 Figure 8.6. Internal Components (Figure 1 of 3) 8.14 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 294
Table 8-6. Internal Components (1 of 3) Part # • , NOTES j tizscliti, ' QTY RB1-0221-000CN 1 Guide, Upper 1 RB1-0801-000CN 3 S Crossmcmber 1 RB1-0804-000CN 4 S Mount, Fusing Assembly 1 RB1-0818-000CN 5 Front support, stop 1 RG5-0076-200CN 6 High Voltage Power Supply (IIISi) 1 RG5 - HP LaserJet 4000 | Service Manual - Page 295
17 21 cc! 17 20 28 74 a 10 19 15 144 12 (J204) \ \in a 9 Is (J1001)11 T (Jindy) 24 23 a r -19 22 25 Figure 8-7. Internal Components (Figure 2 of 3) 8-16 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 296
000CN 3 S Holder, Left RB1-0805-000CN 4 S Cartridge Switch Spring RB1-0815-000CN 5 S Duct, Fan RBI-0830-030CN 6 S Cover, Inner Right RB1-0831-000CN 7 S Cover, Inner Left RB1-0849-030CN 8 RF5-0111-000CN 9 S Shaft S Plate, Right RF5-0113-000CN 10 S Motor Cover RH2-5129-000CN 11 Cable - HP LaserJet 4000 | Service Manual - Page 297
1OF 12C 10H 10 '1%;" 10E 10G 41 1 0 I 510A 12 11 9 99 0 9A- 0 • 14 (J6) 18 I a 8 (J1018) A (J4) 0 8 19 /2 19 (J011) 17 (J10) 15 o. Figure 8-8. Internal Components (Figure 3 of 3) 8-18 Parts 8 Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 298
Table 8-8. Internal Components (3 of 3) Part # REF NOTES DESCRIPTION RBI-0401-000CN 1 S Plate, Rear RG5-0140-000CN 2 S TP Rail Assembly (IIISi) 9A S AC Power Supply (220V) (4Si) RG5-0094-000CN 9B _ Sensor PCA QTY 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I 1 Parts 8, Diagrams: PARTS LISTS 8-19 - HP LaserJet 4000 | Service Manual - Page 299
Guide Driver PCA S Cable, Support, PCA WT2-0204-000CN 22 WT2-5031-000CN 23 S Clip, Cord S Clip, Cord 1 For LaserJet IIISi serial number 3199J and below. 2 For LaserJet IIISi serial number 32005 and above. QTY 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4 1 1 8-20 Parts & Diagrams: PARTS - HP LaserJet 4000 | Service Manual - Page 300
0 0 Figure 8-9. Control Panel Assembly Table 8-9. Control Panel Assembly Part # REF NOTES LESCRIPTION RG5-(x]88-00OCN I Control Panel Assembly (II1Si) RG5-0162-000CN 1 Control Panel Assembly (4Si) QTY I I Parts & Diagrams: PARTS LISTS 8-21 - HP LaserJet 4000 | Service Manual - Page 301
QJ Figure 8-10. Paper Input Unit (Figure 1 of 2) Part # Table 8-10. Paper Input Unit (1 of 2) 'REF NOTES Iv . ...DESO14PTWN RCI5-0025-220CN I Paper Input Unit (Pill) QTY I 8-22 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 302
rh. Kr. 10' ecP 1.4 9 50 01 g est ,0 Figure 8-11. Paper Input Unit (Figure 2 of 2) Table 8-11. Paper Input Unit (2 of 2) Part # REF NOTES DESCRIPTION RG5-0034-700CN 2 Paper Pickup PCA RB1-0109-000CN 9 Separation Clutch RF5-0041-000CN 50 Pickup/Separation Rollers QTY 1 2 6 Parts & - HP LaserJet 4000 | Service Manual - Page 303
rl Figure 8-12. Litter Assembly Table 8-12. Litter Assembly Part # an NOTES DESCRIPTION FiG5-0026-000CN I Lifter Assembly QTY 2 8-24 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 304
RB1-085:3-000CN 2 S Linkage Guide Block RB1-0811-000CN 3 S Linkage, Main Switch RB1-0692-000CN 4 S Foot, Main Switch RS5-2054-000CN 8 S Spring RH7-6020-000CN 9 Switch, Rocker, 250V, 16A RG5-0102-030CN 10 Main Switch Assembly QTY I 2 1 4 1 1 1 Parts & Diagrams: PARTS LISTS 8-25 - HP LaserJet 4000 | Service Manual - Page 305
4 et0 Figure 8-14. Main Motor Drive Train Table 8-14. Main Motor Drive Train Part # REF NOTES DESCRIPTION RG5-0040-000CN I Drive Assembly, Main Motor QTY 1 8-26 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 306
0 00 0 (Tier. I Figure 8-15. Pickup Roller Drive Assembly Table 8-15. Pickup Roller Drive Assembly Part # REF NOTES DESCRIPTION RG5-0027-000CN 1 not orderable - for reference only QTY • Parts & Diagrams: PARTS LISTS 8-27 - HP LaserJet 4000 | Service Manual - Page 307
4$O 6 9 czegiU9 8 Figure 8-16. Job Offset Assembly Table 8-16. Job Offset Assembly Part # IMF NOTES DESCRIPTIQN RG5-0381-150CN 1 Job Offset Assembly RG5-0063-000CN 6 S Flapper Solenoid Unit RG5-0064-000CN 7 S Feed Guide Solenoid Unit RG5-0065-000CN 8 S Offset Solenoid I 7nit 8-28 - HP LaserJet 4000 | Service Manual - Page 308
0 Figure 8-17. Registration Assembly Table 8-17. Registration Assembly Part # REF NTS DESCRIPTION R.G5-0161-060CN 1 Registration Roller Assembly QTY I Parts & Diagrams: PARTS LISTS 8-29 - HP LaserJet 4000 | Service Manual - Page 309
0 0 Ug a Figure 8-18. Fusing Assembly 1 of 2 8-30 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 310
;)* 0 E9 ri0 Gov Figure 8-18b. Fusing Assembly 2 of 2 Table 8-18. Fusing Assembly Part # REP' NOTES DESCRIPTION RG5-0046-270CN 1 Fusing Assembly (110/ I 15V) RG5-0047-270CN I Fusing Assembly (220/240V) QTY 1 1 Parts & Diagrams: PARTS LISTS 8-31 - HP LaserJet 4000 | Service Manual - Page 311
11 92291E 11 RG5-0171-000CN 14 RG5-0172-000CN 14 R.G1-2802-000CN 14 Paper Cassette (LTR) 1 Paper Cassette (A4) 1 Paper Cassette (LGL) 1 Paper Cassette (EXEC) 1 Cassette Cover, A4, LTR, EXEC 1 Cassette Cover, Legal 1 Env. Feeder, Top Tray 1 8-32 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 312
Figure 8-20. Paper Refeed Assembly Table 8-20. Paper Refeed Unit (PRU) Part # REF NOTES DESCRIPTION RG5-0056-000CN 1; Pooworalititt QTY i Parts & Diagrams: PARTS LISTS 8-33 - HP LaserJet 4000 | Service Manual - Page 313
W7) 2 (FM2) 1 Figure 8-21. Fan Assembly (FM2) Table 8-21. Fan Assembly (FM2) Part # REF NOTES DESCRIPTION RBI-0792-0000N 1 DUCT, FAN RH7-1105-000CN 2 FAN, 24V1)C (111Si) R117-1162-000CN 2 FAN, 24VDC (4Si) QTY 1 1 1 8-34 Parts & Diagrams: PARTS LISTS - HP LaserJet 4000 | Service Manual - Page 314
:40 RIGHT ONLY 0 0 Figure 8-22. Hinge Assembly Table 8-22. Hinge Assembly Part # REF NOTES DESCRIPTION RC;5.-0074-000CN 1 S Hinge Assembly, Left RG5-0075-000CN 1 S Hinge Assembly, Right QTY 1 1 Parts & Diagrams: PARTS LISTS 8-35 - HP LaserJet 4000 | Service Manual - Page 315
6 (J1007) Lr, 1A 1B 1C Figure 8-23. Right Main Block Assembly Table 8-23. Right Main Block Assembly Part # REF NOTES DESCRIPTION RG5-0039-000CN 1 S Right Main Block Assembly RH7-5031-000CN 6 S Solenoid, 24 VI)C RB1-0260-000CN I A S Arm, Lifting, right RB1-0262-000CN - HP LaserJet 4000 | Service Manual - Page 316
4 7 O 6 s c 410 0 Figure 8-24. Left Main Block Assembly Table 8-24. Left Main Block Assembly Part # REF NOTES DESCRIPTION RG5-0038-000CN 1 S Left Main Block Assembly RBI-0244-000CN 4 S Joint RBI -0245-000CN 6 S Plate, terminal RS5-0036-000CN 7 S Gear, 24 tooth - HP LaserJet 4000 | Service Manual - Page 317
Assembly 3 2 5- 4 6 Figure 8-25. Duplex Unit Assembly Table 8-25. Duplex Unit Assembly Part # REF NOTES DE!3CRIPTION C2061-69001 I Duplex Unit RG5-0052-000CN 2 Duplex Driver PCA RH7-5030-000CN 3 S Solenoid RH7-1103-000CN 4 11117- I 102-000CN 5 S Switchback Mot or 5 Horizontal - HP LaserJet 4000 | Service Manual - Page 318
Mgr IBM LAN Server 802.5 Token Ring C2059E Macintosh EtherTalk 802.3 ThinLAN, 10BASE-T, StarLAN C2059F Macintosh LocalTalk LocalTalk C2059T UNIX TCP/IP 802.3 ThinLAN, 10BASE-T, StarLAN Table 8-27. LaserJet 4Si Supported MIO Configurations UPPER. MI() SLOT (MIO2)1 Printer Description New - HP LaserJet 4000 | Service Manual - Page 319
instructions with each MIO card carefully. Failure to follow these instructions can damage BOTH the MIO card and the LaserJet 4Si printer. UPPER MIO FACEPLATE REPLACEMENT PART configured by the customer at the Front Panel. The LaserJet IllSi is capable of handling odd, even, or no parity. The printer - HP LaserJet 4000 | Service Manual - Page 320
to install up to 32 MBytes of additional SIMMs on LaserJet IIISi printers with serial number 3200J and above, 16 Mbytes maximum is accessible. Table 8-28. Recommended Memory Printing Need 300DPI PCL only 2 Mb PCL only w/PAGE PROTECT=LETTER 2 Mb PCL only w/PAGE PROTECT=LEGAL 2 Mb PCL - HP LaserJet 4000 | Service Manual - Page 321
of 100 envelopes at a time and comes with a localized installation, operation and troubleshooting guide. Note i VP Media weight specification for the envelope feeder is 16 to 24 lbs. Envelopes must meet criteria outlined in the Envelope Feeder User's Manual. 8-42 Parts & Diagrams: ACCESSORY - HP LaserJet 4000 | Service Manual - Page 322
(LTR) 2000 Sheet Output Stacker (A4 or LTR) Printer Cabinet Duplex Upgrade Paper Cassette (Letter) Paper Cassette (Legal) Paper Cassette (A4) Paper Cassette (Executive) Printer Maintenance Kit (115V) Printer Maintenance Kit (220V) Toner Cartridge 1 LaserJet IIISi serial number 3199J and below only - HP LaserJet 4000 | Service Manual - Page 323
INDEX This parts index references all part numbers for field replacable parts which are contained in Chapter 8 of this manual. The first section of the index is sorted by part number, and the next section is sorted by part name. The listing is cross-referenced to the tables that accompany each of - HP LaserJet 4000 | Service Manual - Page 324
-40003 MIO Guide Assy (4Si) C2009-60105 Cable, Parallel Assy (4Si) C2009-60109 Upper MIO Cover Plate (4Si) C2009-67901 Formatter PCA (New) (4Si) C2009-69001 Formatter PCA (Exchange) (4Si) C2013A PostScript Level2 SIMM Upgrade3 C2061A C2062A Duplexer Upgrade Printer Maintenance Kit (115V - HP LaserJet 4000 | Service Manual - Page 325
LaserJet IllSi/4Si Parts Index - Sorted by Part Number (continued) PART NUMBER • WII : C2971A Printer Cabinet J2341B MIO Card (New) J2371A MIO Card (New) J2372A MIO Card (New) J2373A MIO Card (New) J2341-69001 MIO Card (Exchange) J2371-69001 MIO - HP LaserJet 4000 | Service Manual - Page 326
LaserJet 111Si/4Si Parts Index - Sorted by Part Number (continued) PART -000CN RB1-0821-000CN Main Switch Linkage Duct, Fan Hook Support, Stop Frame, Right Front Frame, Upper Right 8-13 8-7 0854-020CN RB1-0855-000CN Main Switch Linkage Guide Block Screw, Fusing Assembly Toothed Lockwasher (Fusing - HP LaserJet 4000 | Service Manual - Page 327
LaserJet IIISi/4Si Parts Index - Sorted by Part Number (continued) PART NUMBER DESCRIPTION RF5-0098-000CN Bar, Left (Top 240V) RG5-0052 000CN Duplexer Driver PCA RG5-0056-000CN Paper Refeed Unit RG5-0063-000CN Flapper Solenoid Unit RG5-0064-000CN Feed Guide Solenoid Unit RG5-0065-000CN - HP LaserJet 4000 | Service Manual - Page 328
LaserJet IllSi/4Si Parts Index - Sorted by Part Number (continued) PART NUMBER DESCRIPTION _ RG5-0085-060CN DC Voltage Unit RG5-0106-000CN Cable, DC Driver PCA RG5-0107-000CN Cable, Front Panel (IIISi) RG5-0108-000CN RG5-0109-000CN Cable, Paper Input Cable, Duplex Unit RG5-0116-000CN - HP LaserJet 4000 | Service Manual - Page 329
LaserJet IllSi/4Si Parts Index - Sorted by Part Number (continued) PART NUMBER DESCR.IPTION RG5-0140-000CN Plate, Rear 8-8 8-8 8-8 8-8 8-1, 8-17 8-2, 8-9 8-3 8-8 8-8 8-2, 8-8 8-2, 8-8 8-2, 8-8 8-2, 8-8 8-2, 8-6 8-19 8-19 8-3 8-2, 8-16 8-7 8-2 8-25 8-7 8-7 8-25 8-25 Parts Index: BY PART NUMBER 7 - HP LaserJet 4000 | Service Manual - Page 330
LaserJet IllSi/4Si Parts Index - Sorted by Part Number (continued) PART NUMBER _ . DESCRIPTION RI17-1104-000CN Fan, 24 VDC ( WG8-5038-020CN Photo-Interrupter GP1S09C1 WT2-0204-000CN Clip, Cord WT2-5025-000CN Support, DC Power Supply PCA WT2-5031-000CN Clip, Cord XA9-0233-000CN Screw, - HP LaserJet 4000 | Service Manual - Page 331
Parts Index (sorted by Part Name) This portion of the parts index references all part numbers alphabetized by part name. The listing is cross-referenced to the tables that accompany each of the Illustrated Parts Breakdown figures in Chapter 8. Parts Index: BY PART NAME 9 - HP LaserJet 4000 | Service Manual - Page 332
LaserJet IIISi/4Si Parts Index - Sorted by Part Assy) Cable Guide (Top Cover Assy) Cable, High Voltage Unit Cable, DC Driver PCA Cable, High Voltage Bias Guide Assy Cable, 8-8 8-7 8-4 8-4 8-3 8-7 8-4 8-6 8-8 8-6 8-8 8-6 8-8 8-3, 8-8 8-3, 8-8 8-8 8-8 8-7 8-7 8-7 8-8 8-8 10 Parts Index: BY PART NAME - HP LaserJet 4000 | Service Manual - Page 333
LaserJet Si Parts Index - Sorted by Part Name (continuod) DESCRIPTION Cassette Body (A4) Cassette Body (EXEC) Cassette 115V (4Si) DC Power Supply PCA 220V (IIISi) DC Power Supply PCA 220V (4Si) PART NUMBER 92291D 92291E 92291C 92291B RG5-0171-000CN RG5-0172-000CN RB1-0482-000CN WT2-0204-000CN - HP LaserJet 4000 | Service Manual - Page 334
LaserJet IIISi/4Si Parts Index - Sorted by Part Name (continued) DESCRIPTION Delivery Cover Assembly Door, Duplex Access Door Sensor Assembly Drive Assembly, Main Motor Duct, Fan Duplexer Assembly Duplexer Driver PCA Duplexer Upgrade Env. Feeder, Top Tray Fan Duct (FM2) Fan, 24 VDC (FM1) Fan, 24 - HP LaserJet 4000 | Service Manual - Page 335
LaserJet IllSii4Si Parts Index - Sorted by Part Name (continued) DESCRIPTION Front Switch Button Assembly Front Upper Cover Assembly (IIISi) Front Upper Cover Assembly (4Si) Fusing Assembly (110/115V) Fusing Assembly (220/240V) Gear, 24 tooth (Left Main Block Assy) Guide, Cartridge Guide, Upper - HP LaserJet 4000 | Service Manual - Page 336
LaserJet IllSi/4Si Parts Index - Sorted by Part Name (continued) DESCRIPTION Main Motor PCA Main Switch Assembly Main Switch Linkage Main Switch Linkage Guide Guide Assy (4Si) Mirror Assembly Mount, Fusing Assembly Mount, Paper Holder Offset Solenoid Unit Paper Input Unit Paper Pickup PCA Paper - HP LaserJet 4000 | Service Manual - Page 337
LaserJet IIISi/4Si Parts Index - Sorted by Part Name (continued) DESCRIPTION PostScript Level2 ROM Upgradel PostScript Level2 SIMM Upgrade (4Si) PostScript Level2 SIMM Upgrade2 PostScript ROM Upgrade (IIISi)1 PostScript SIMM Upgrade (IIISi)2 Printer Cabinet Printer Maintenance Kit (115V) Printer - HP LaserJet 4000 | Service Manual - Page 338
LaserJet IIISi/4Si Parts Index - Sorted by Part Name (continued) DESCRIPTION PART NUMBER Support, Stop RB1-0818-000CN Switch, Rocker, 250V, 16A RH7-6020-000CN Switchback Motor RH7- 1103-000CN Toner Cartridge 92291A Toothed Lockwasher (Fusing Assy mount) RB1-0855-000CN Transfer Guide - HP LaserJet 4000 | Service Manual - Page 339
accessory parts, 8-38 AC Driver PCA, 6-26, 7-63 AC Power Inlet Assembly, 6-25 AC power line considerations and requirements, 2-4 AC power supply, 6-25 aids to troubleshooting, 7-54 Antistatic Teeth cleaning, 4-14 assemblies, removal and replacement duplex, 6-54 internal, 6-34 paper input, 6-32 right - HP LaserJet 4000 | Service Manual - Page 340
4-12 printer (general), 4-11 registration area, 4-13 Transfer Guide, 4-15 clearable warnings, 7-21 clearing the service message, 7-75 clearing the user maintenance message, 4-16 cold reset, 7-67 communication problems, 7-5 communications check, 7-109 components, PCA, 7-54 configuration AUTOEXEC.BAT - HP LaserJet 4000 | Service Manual - Page 341
Cover Assembly, 8-9, 8-12 Drive Train, Main Motor, 6-40 D-Roller, Duplex, maintenance, 4-10 drum rotation functional check, 7-106 drum sensitivity/switches check, 7-37 duplex assembly paper jams, 7-35 parts, 8-38 troubleshooting, 7-46, 7-113 Duplex PCA, 6-55 duplex subassemblies, 6-54 Duplex Unit - HP LaserJet 4000 | Service Manual - Page 342
ERROR, 7-7 41/51 ERROR, 7-42 41 ERROR, 7-40 50 ERROR, 7-62 50 SERVICE, 7-40 51 ERROR, 7-42 52 ERROR, 7-44 53 SERVICE, 7-45 54 SERVICE, 7-46 55 ERROR, 7-47 55 SERVICE, 7-46 56 ERROR, 7-47 57.0 ERROR, 7-47 57.1 SERVICE, 7-48 57.2, .3, .4, SERVICE, 7-49 59 ADD MEMORY, 7-49 tables, 7-9 troubleshooting - HP LaserJet 4000 | Service Manual - Page 343
6-47 HP, doing business with, 1-17 HP FIRST, 1-12 image defect summary, 7-85 image formation system overview, 5-1 stages, 5-1 image formation troubleshooting, 7-105 image skew, 7-99 improperly sized image, 7-101 input area paper jams, 7-33 installation and configuration, 3-1 installed devices (self - HP LaserJet 4000 | Service Manual - Page 344
, 4-10 kit, 4-1 printer, 4-1, 4-4 user, 1-16, 4-1, 4-4 verification, 4-3 maintenance count resetting, 7-75 understanding, 7-72 major assemblies, 8-4 manual conventions, iv margin specifications, 7-100 material safety data sheet (MSDS), 1-12 media paper jams, 7-32 specifications, 2-2 memory, 16 - HP LaserJet 4000 | Service Manual - Page 345
1-7 parts, 1-18 printer accessories, 8-2 ozone safety, 1-12 p page count (self test), 3-9, 3-11 page count setting, 7-72 page coverage, five percent, 4-2 pan cover, Formatter, 6-14 Paper Cassette Assembly, 8-32 Paper Feed PCA, 7-59 paper input unit (PIU), 6-32 PCA, 6-33 paper jam causes, 7-32 Duplex - HP LaserJet 4000 | Service Manual - Page 346
6-55 Formatter, 7-57 High Voltage Power Supply, 7-64 Paper Feed, 7-59 Paper Input Unit, 6-33 Sensor, 6-25 PC board components, 7-57 PCE (Parts Center Europe), 1-18 phone number CIC (Customer Information Center), 1-18 CSC (Customer Support Center), 1-18 HP FIRST, 1-12 MSDS (Material Safety Data Sheet - HP LaserJet 4000 | Service Manual - Page 347
black lines, 7-92 recommended memory, 8-41 refeed unit, paper (PRU), 6-37 registration area cleaning, 4-13 registration area paper jams, 7-33 Registration Assembly, 6-36, 8-29 registration specifications, 7-100 related documentation, 1-7 removal and replacement, 6-1 repetitive defects, 7-93 - HP LaserJet 4000 | Service Manual - Page 348
replacement, 6-1 strategy, 1-16 troubleshooting, 7-1 service, checkpoints, 4-3 service message,clearing, 7-75 service mode, 7-70 accessing, 7-70 menu map, 7-71 self test, 7-74 setting maintenance count, 7-72 page count, 7-72 serial number, 7-72 shipping damage, 3-2 Index-10 short toner cartridge - HP LaserJet 4000 | Service Manual - Page 349
77 printer message troubleshooting, 7-9 procedures, 7-2 SIMM problems, 7-77 wiring diagram, 7-117 U UC/LC LOAD, 7-24 unit duplex, 6-54 duplex, subassemblies, 6-54 paper input, 6-32 paper input PCA, 6-33 paper refeed (PRU), 6-37 unpacking, 3-2 user maintenance, 1-16, 4-1, 4-4 user maintenance message - HP LaserJet 4000 | Service Manual - Page 350
V VCCI statement (Japan), 1-14 verifying printer maintenance, 4-3 vertical dark streaks, 7-101 vertical white streaks, 7-90 voltage test points, 7-65 W warnings, iv warranty, printer, 1-15 white or blank pages, 7-104 wiring diagram, 7-117 Index -12 - HP LaserJet 4000 | Service Manual - Page 351
HP High-Capacity Paper Feeder for the HP LaserJet 4Si, 4Si MX, and IIISi Service Manual [4/3 HEWLETT PACKARD HP Part No. C2921-90003 Printed in USA 10/93 - HP LaserJet 4000 | Service Manual - Page 352
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for errors contained herein or for incidental consequential damages part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard - HP LaserJet 4000 | Service Manual - Page 353
Recommended Paper Guidelines Paper and Usages to Avoid Related Documentation Safety Information Warranty Statement Warranty Exclusions Warranty Limitations After Warranty Customer Support Dealer and Service Center Support 2. Remo% al and Replacement Introduction Tools Needed For Repairs Maintenance - HP LaserJet 4000 | Service Manual - Page 354
After loading, elevator will raise, then abruptly drop 3-5 Paper is feeding short, causing paper jam ("Internal Jam" or "Input Jam") signal in printer 3-5 Media is skewing while feeding 3-6 4. Parts List 4-1 2 Contents - HP LaserJet 4000 | Service Manual - Page 355
the paper capacity of the LaserJet 4Si, 4Si MX, and 111Si printers to 2,000 sheets of paper. The Paper Feeder comes with the following items included: I. Paper Feeder 2. Printer Pedestal 3. Power Adapter 4. Power Cord 5. Duplex Paper Guide 6. User's Guide 7. Unpacking Instructions Identification - HP LaserJet 4000 | Service Manual - Page 356
Specifications Dimension Height: Width: Depth: Weight: Physical Dimensions Measurement 270 mm (10.5 in) 330 mm (13 in) 350 mm (13.8 in) 5.8 kg (13 Ib) Size: Letter A4 Weight: Paper Requirements Dimensions 216 x 279 nun (8.5 x 11 in) 210 x 297 mm (8.5 x 11.67 in) 60 to 90 grams (16 to 241b) 1-2 - HP LaserJet 4000 | Service Manual - Page 357
recommended for use in your HP Paper Feeder. Paper Specifications Type Acid Content Ash Content Basis Weight Brightness Caliper Curl Cut Edge Conditions Finishing Furnish (Fiber Composition) Grain Moisture Content Opacity Packaging Specifications 5.5 pH Minimum Not to Exceed 10% 16 to 24 lb. (60 - HP LaserJet 4000 | Service Manual - Page 358
"Troubleshooting" (Chapter 3), Category In Use In Storage Environmental Specifications Temperature 10 to 33 deg. C (50 to 91.4 deg. F) 0 to 35 deg. C (32 to 95 deg. F) Humidity 20 to 80% RH 20 to 80% RH Related Documentation The following guide can be ordered from Hewlett-Packard: HP LaserJet - HP LaserJet 4000 | Service Manual - Page 359
problem and place it inside the package with the paper feeder. This warranty does not apply if the feeder has been damaged by accident, misuse, or as a result of service modification by other than an authorized Hewlett-Packard service facility. No other express warranty is given by Hewlett-Packard - HP LaserJet 4000 | Service Manual - Page 360
product. Hewlett-Packard specifically service-authorized dealer or to an HP service center for repair if necessary. Dealer and Service Center Support The Paper Feeder is designed to be repaired by the dealers or service centers using the User's Guide and the Service Manual to troubleshoot the problem - HP LaserJet 4000 | Service Manual - Page 361
that can be purchased directly through Hewlett-Packard's Support Materials Organization. In each section, there is a figure to facilitate removal and replacement of the particular part. These pictures contain numbers which refer to the action taken in the instructions. For example, taking off the - HP LaserJet 4000 | Service Manual - Page 362
use can damage the more sensitive components found in the Paper Feeder. Maintenance Schedule (to be performed by user) Roller and Unit Cleaning (Monthly) Feed roller cleaning should be performed every month. Step I. Remove the printer's upper tray, if installed. 2. Open the smoked plastic door of - HP LaserJet 4000 | Service Manual - Page 363
be replaced every 200,000 sheets (see section "Removing the Feed Rollers" for instructions). 8. Wipe the interior of your feeder with a clean, lint-free cloth to minimize any paper dust. 9. Re-insert your paper and close the rear door of the Paper Feeder. 10. Re-insert your printer's upper paper - HP LaserJet 4000 | Service Manual - Page 364
) by tilting it at an angle that will allow it to be freed of the remaining pivot point. 9 Figure 2-4. Removing the Feeder Door 2-4 Removal and Replacement - HP LaserJet 4000 | Service Manual - Page 365
where the inner frame and cover meet, and pull up and outward. The cover will come off. 5. Use the same procedure for either side. O "474011;r• 41. Figure 2-5. Removing the Side Covers Removal and Replacement 2-5 - HP LaserJet 4000 | Service Manual - Page 366
side frame lightly to allow the top cover pivot nut to be freed. 5. Pull the top cover free. Figure 2-6. Removing the Top Cover 2-6 Removal and Replacement - HP LaserJet 4000 | Service Manual - Page 367
attached to the underside of the nosepiece. 6. Lift the entire nosepiece assembly off of the mounting posts. U3ig 0 0 Figure 2-7. Removing the Nosepiece Assembly Removal and Replacement 2-7 - HP LaserJet 4000 | Service Manual - Page 368
will become loosened in its holding bracket. 3. Dislodge lower snap-in connectors and remove sensor from bracket. 4. Unplug wire harness from sensor and plug in replacement. Figure 2-8. Removing the Nosepiece Photo Sensor 2-8 Removal and - HP LaserJet 4000 | Service Manual - Page 369
Figure 2-9.) Note Do not remove Drive Chain from sprockets at any time. Step 1. Identify new Roller-Left and Roller-Right from the Roller Replacement Kit as shown. 2. Locate blue retainers on Shaft 1. Remove each retainer by firmly grasping and pulling upward. 3. Slide Shaft 1 to right to disengage - HP LaserJet 4000 | Service Manual - Page 370
Removing the Printed Circuit Board (Refer to Figures 2-10, 2-11, and 2-12.) Step 1. Put the ESD strap each corner). 5. Remove the board and store it in a static free area. Printed Circuit Board Figure 2-10. Removing Printed Circuit Board J4 4 7.• 1I • • • J3 J2 Sensor Harness Plug 6 J4 Feed - HP LaserJet 4000 | Service Manual - Page 371
and correct the problem. Intended Use Of This Guide Though the Paper Feeder has been designed as "low-to-no maintenance equipment," there may come a time when it is necessary to perform minor repairs. This chapter assists the dealer and service center technicians in troubleshooting procedures and - HP LaserJet 4000 | Service Manual - Page 372
troubleshoot any problems. If you experience a problem not documented here, or require further clarification of the contents of this manual, please contact the Hewlett-Packard Dealer Support If the light is off or blinking, replace the adapter (refer to the part number list in Chapter 4). To check - HP LaserJet 4000 | Service Manual - Page 373
Inspect the nosepiece by: 1. Removing the feeder from the printer. 2. Ensure power is disconnected. 3. Remove any paper from nosepiece. Then: 4. Verify that the sensor is present 4. If sensor has been damaged, it should be replaced (refer to the part number list in Chapter 4). Troubleshooting 3-3 - HP LaserJet 4000 | Service Manual - Page 374
" section). 1. With the unit taken out of the printer, power disconnected, and the left side cover removed, locate . (Note: The feed action is enabled when the paper has risen to the point where the roller assembly arm unit from the printer. 2. Disconnect power from unit. 3. Remove cover from - HP LaserJet 4000 | Service Manual - Page 375
Symptom Attention Area After loading, elevator will raise, then abruptly drop Elevator Gear Assembly Paper is feeding short, causing paper jam ("Internal Jam" or "Input Jam") signal in printer Feed Rollers Tension Springs Corrective Action 4. Locate microswitch attached to grey and white wires - HP LaserJet 4000 | Service Manual - Page 376
is skewing at, in relationship to the guide through which it is being fed. 4. Inspect the feed rollers for any difficulty in movement or improper installation. 5. Inspect tension spring position. It is best to have both springs in the same position on their respective sides. 3-6 Troubleshooting - HP LaserJet 4000 | Service Manual - Page 377
fenimelfliiiiiiism&-*10111011W Figure 3-1. Left Side View Tension Springs Elevator Actuation Arm Upper Limit Switch Lower Elevator Limit Switch Figure 3-2. Right Side View Printed Circuit Board Troubleshooting 3-7 - HP LaserJet 4000 | Service Manual - Page 378
in the HP LaserJet 4Si, 4Si MX, and II1Si Paper Feeder. Parts List Description Nosepiece Sensor Nosepiece Assembly (Letter) Nosepiece Assembly (A4) PC Board Assembly Rear Door Duplex Paper Guide Roller Replacement Kit Power Adapter Printer Pedestal User's Guide (A4 and Letter) Service Manual (A4 - HP LaserJet 4000 | Service Manual - Page 379
HP LaserJet IliSi, 4Si and 4Si MX Output Stacker Service Manual Ea HEWLETT PACKARD HP Part No. C2801-90002 Printed in ISA First Edition - HP LaserJet 4000 | Service Manual - Page 380
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for errors contained herein or for incidental consequential damages part, of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard - HP LaserJet 4000 | Service Manual - Page 381
Edition May, 1993 Conventions This manual uses the following conventions: The names of major printer parts and assemblies are Capitalized. Bold indicates text visible on the printer's display or commands as seen on a PC terminal. indicates keys, such as aim, on the printer's Control Panel or on - HP LaserJet 4000 | Service Manual - Page 382
of LaserJet IIISi Printer 1-2 Installation Instructions 1-3 Required Tools 1-3 Mounting the Casters 1-3 Placing the Printer on the Stacker Cabinet 1-4 Extending the Cabinet Support Plate 1-5 Mounting the Paper Feeder Support Shelf 1-6 Installing the Duplex Paper Guide 1-8 Mounting - HP LaserJet 4000 | Service Manual - Page 383
Jam or Stacker Full 4-5 Printer Indicates "Internal Paper Jam" After Power On 4-5 Diagnostic Decision Charts 4-6 The Main Chart 4-7 1: Transport Mechanism Issues 4-8 2: Elevator Issues 4-9 3: Registration Issues 4-10 5. Service and Parts Required Tools 5-1 Removal and Replacement - HP LaserJet 4000 | Service Manual - Page 384
1-4 1-4. Extending the Support Plate 1-5 1-5. Installing the Support Shelf 1-6 1-6. Detailed View of Shelf Installation 1-7 1-7. Placement of the Duplex Paper Guide 1-8 1-8. Installing the Power Adapter Holder 1-9 1-9. Running the Cord to the Feeder 1-10 1-10. Sensor PCA Location - HP LaserJet 4000 | Service Manual - Page 385
5-3. Interior View of Transport Module 5-5 5-4. Detail View of Sensor Arm 5-5 Contents-4 - HP LaserJet 4000 | Service Manual - Page 386
to installation please check that the following items have been received: 0 O CI Paper Feeder Power Adapter Holder Transport Module Output Stacker Cabinet Paper Feeder Support Shelf (With Wing Nuts and Washers) Printer Interface Cable t- 1t1- 0 Casters: Two braking Four non-braking Figure - HP LaserJet 4000 | Service Manual - Page 387
/Retrofit of LaserJet IllSi Printer The Output Stacker can be retrofitted to the ILISi printer by installing a new Delivery Cover Assembly (HP P/N RG5-0067-000CN). See Chapter 6 of the LaserJet IIISi/4Si Printer Combined Service Manual for detailed replacement procedures. 1-2 Installation - HP LaserJet 4000 | Service Manual - Page 388
Installation Instructions Installation of the output stacker is required to be performed by an HP authorized dealer or an HP service engineer. cabinet. The remaining casters are located on the side opposite the door, and on the support shelf, as shown in Figure 1-2. a a E ea; b a = caster with - HP LaserJet 4000 | Service Manual - Page 389
on the Stacker Cabinet Turn off the printer and remove the power cord. Remove the printer's standard paper trays. Have someone help you with the next step. With you and your partner on either side of the printer, lift the printer and position it on the top of the stacker cabinet, so that all four - HP LaserJet 4000 | Service Manual - Page 390
Extending the Cabinet Support Plate Slowly pull the lower cabinet support plate out until it is fully extended and it locks into position, as shown in Figure 1-4. Figure 1-4. Extending the Support Plate Installation 1-5 - HP LaserJet 4000 | Service Manual - Page 391
Mounting the Paper Feeder Support Shelf If you are using the optional HP Paper Feeder, attach the feeder shelf to the front of the stacker cabinet. An example is shown in Figure 1-5. Figure 1-5. Installing the Support Shelf 1-6 Installation - HP LaserJet 4000 | Service Manual - Page 392
Slide the paper feeder support shelf down onto the protruding hooks on the front of the cabinet, aligning the holes in the shelf with those in the cabinet. Secure the shelf with the screws, washers and wing nuts provided in the carton, as shown in the sequence in Figure 1-6. ,41 ti Figure 1-6. - HP LaserJet 4000 | Service Manual - Page 393
Installing the Duplex Paper Guide If you are using the HP Paper Feeder, install the duplex paper guide provided with the paper feeder. This step is very important when the printer has the duplexing option for double-sided printing. Insert the bottom lip of the duplex paper guide into the opening of - HP LaserJet 4000 | Service Manual - Page 394
Power Adapter Holder If you are using the HP Paper Feeder, attach the power adapter holder to the lower rear side of the cabinet. Mount the holder in the slots on the cabinet as shown in Figure 1-8. Insert the power adapter provided with the paper feeder, then connect the cord as shown in - HP LaserJet 4000 | Service Manual - Page 395
Run the adapter cord along the base of the printer toward the feeder, as shown in Figure 1-9. ... ..1.1•94,41,TIVITITTITITTIT N.::,./. INE Figure 1-9. Running the Cord to the Feeder 1-10 Installation - HP LaserJet 4000 | Service Manual - Page 396
when a paper jam has occurred in the Transport Module, the cable allows the stacker to send a signal to the printer to stop printing until the problem is resolved. Please refer to the LaserJet IIISOSi Combined Printer Service Manual for details about removal and replacement of printer parts in order - HP LaserJet 4000 | Service Manual - Page 397
(2 screws). 2. Remove the cover on the right rear of the printer (1 screw). 3. Remove the format controller cover (8 screws) and disconnect in. the RFI grounding tabs. This prevents damage which can cause the printer to create electrical noise. The sensor PCA is located below the fan (FM1) and - HP LaserJet 4000 | Service Manual - Page 398
end of the stacker interface cable to the J201 connector on the sensor PCA, and connect the other side of the stacker's cable to the printer's cable, as shown in Figure 1-12. The pigtail will be routed out the rear of the - HP LaserJet 4000 | Service Manual - Page 399
7. Route the stacker interface cable's pigtail through the same chassis frame cutout where the J202 cable is led. Feed the stacker interface cable through the cable harness which holds the J202 cable, as shown in Figure 1-13. 8. Next, feed the interface cable through the diagonal notch on the side - HP LaserJet 4000 | Service Manual - Page 400
Verify that the cable will not be squeezed by the printer's cover when opened. 9. Replace the format controller/pan assembly, and reconnect the three connectors. 10. Reconnect the fan, replace the format controller cover, and replace right side cover. Installing the Transport Module Caution Avoid - HP LaserJet 4000 | Service Manual - Page 401
1. Locate the stacker connection cable inside the stacker cabinet. Feed it out through the cutout in the rear of the cabinet. 2. Plug the stacker connection cable into the matching connector at the front of the Transport Module (see Figure 1-14). 3. Install the Transport Module into the rear cut-out - HP LaserJet 4000 | Service Manual - Page 402
is positioned on the stand so there is less than lmm between the printer and the Transport Module. A gap will cause paper jams. Connecting the Power Cords and Stacker Interface Cable The following steps are illustrated in Figure 1-16. 1. Plug the stacker interface cable into the matching RJ- - HP LaserJet 4000 | Service Manual - Page 403
3. Plug the printer's power cord into the power receptacle in the Transport Module, then insert the three-prong plug into a proper wall outlet. Note IIf The stacker cabinet's - HP LaserJet 4000 | Service Manual - Page 404
steps are critical for optimum stacker performance. Before operating the stacker, check for the following: 1. The printer's feet must be placed in the stacker cabinet's related dimples. 2. The rear of the printer must be set squarely against the stacker's Transport Module, so there is no gap or skew - HP LaserJet 4000 | Service Manual - Page 405
INCORRECT V) J EGREES INCORRECT / i CO INCORRECT CORRECT Figure 1-17. The Correct Alignment of the Printer to the Stacker (Top View) 1-20 Installation - HP LaserJet 4000 | Service Manual - Page 406
• ..\ ..... INCORRECT t o CORRECT Figure 1-18. The Correct Alignment of the Printer to the Stacker (Side View) Installation 1-21 - HP LaserJet 4000 | Service Manual - Page 407
,2,,vvAr//7/3t,y,ww/,-,/.4,/,-/41/ Kjr „,,y,4y,w,i,,/,,/,:ir,-4.7,44,44.;,y If,: .,. i /////,-///4//,.-.//.//94„/,////,,-I,///,/,,4,,/f////4i./i/77:, ,% (0, .?; Ij 1 . Paper Exit Slot B- I- / Figure 1-19. The Correct Lateral Alignment Readjust the printer within the stacker cabinet - HP LaserJet 4000 | Service Manual - Page 408
carpeting, always unlock the casters before moving the stacker cabinet. 2. Reinstall the printer's paper trays, or complete the procedures for installing the HP Paper Feeder by referring to the HP Paper Feeder User's Guide. Diagrams showing the key components of the Output Stacker are provided in - HP LaserJet 4000 | Service Manual - Page 409
Power Light Stacker Door Feeder Support Shelf Elevator Shelf Handle Elevator Shelf Support Plate Figure 2-1. Output Stacker Components (Door View) 2-2 Using the Output Stacker - HP LaserJet 4000 | Service Manual - Page 410
Transport Module Feeder Power Adapter Holder -Stacker Power Cord Figure 2-2. Output Stacker Components (Rear View) Using the Output Stacker 2-3 - HP LaserJet 4000 | Service Manual - Page 411
Configuring the Printer Selecting the Lower (Rear) Paper Output Path To use the Output Stacker, the lower (rear) paper output path must be selected from the printer's operator panel or from the software application. To select the lower (rear) paper output path, use the following steps: 1. Take - HP LaserJet 4000 | Service Manual - Page 412
the elevator shelf. If the pages do not slide under the paper break, or any signs of reverse curling are exhibited (where the pages curl back toward the Transport Module), stop the self test immediately and refer to the Troubleshooting section for help with Paper Curl problems. The system is now - HP LaserJet 4000 | Service Manual - Page 413
.J ~./ - HP LaserJet 4000 | Service Manual - Page 414
3 Technical Specifications Technical Description Figures 3-1, 3-2, and 3-3 show the technical detail for the Electronic Box and 'transport Mechanism, the location of the paper path, and the location of the opto sensors, respectively. Technical Specifications 3-1 - HP LaserJet 4000 | Service Manual - Page 415
Controller tr, Single dip processor Stacker Skipper mcdior driver Interface cable (stop 4.'2 On' signal to 12 printer) x51 DC matior deNer Media Transport Module (;;i;: Transport steppermotor 11:4- Paper early woof Paper exit/ Slacker height sensor Output Stacker Unit 1...m) Elevator - HP LaserJet 4000 | Service Manual - Page 416
Paper Path Printer's rear media exit S1 Paper Start Sensor M1 Transport stepper motor Pinch roller Paper Brake S2 Paper Exit Sensor-% Figure 3-2. Transport Module Detail Technical Specifications 3-3 - HP LaserJet 4000 | Service Manual - Page 417
Opto Sensors Transport Module Output Stacker LED Q3 Elevator S4 M-2„ K1 K1 = Drawer Locking Solenoid M2 = Elevator Interlock Switch S3 = Door Interlock Switch S4 = Stacker Full LED = Power Light Figure 3-3. Stacker Detail 3-4 Technical Specifications - HP LaserJet 4000 | Service Manual - Page 418
Operation When the Output Stacker is to be used, the lower (rear) paper output path must he selected as the default setting from the printer's operator panel. Si Start Sensor A printed page exits the printer's lower (rear) paper output path and is accepted by the Transport Module. The leading edge - HP LaserJet 4000 | Service Manual - Page 419
be pulled out to remove the paper stack. Power Light The power light indicates power ON during normal operation while connected to a wall outlet. If "paper jam" or "stacker full" conditions occur the power light starts blinking and a "jam" signal is sent to the printer. 3-6 Technical Specifications - HP LaserJet 4000 | Service Manual - Page 420
Charts. This section contains four decision flowcharts, to help you diagnose problems by following a logical path (typically the path the media travels from printer to stacker). Common Areas of Concern No Power ■ If the printer has no power or the stacker power light (located above the stacker - HP LaserJet 4000 | Service Manual - Page 421
Exit To use the Output Stacker, the lower (rear) paper output path must be selected and stored as the default, setting from the printer's operator panel (refer to the "Configuring the Printer" section in Chapter Two). Output Stacker's Elevator Does Not Move ■ Check the status of the power light - HP LaserJet 4000 | Service Manual - Page 422
left the printer's exit will not be reprinted. To determine whether jam problems are caused by the Transport Module or by the printer, select the upper output paper exit tray from the printer's operator panel or open the lower output tray in order to bypass the Transport Module. Troubleshooting 4-3 - HP LaserJet 4000 | Service Manual - Page 423
and latched (refer to "Installation Instructions" section in Chapter One) to ensure a straight paper path without skew. ■ Ensure that the printer is aligned on the stand so that there is minimum distance between the printer and the Transport Module. The pages should be centered between the sides - HP LaserJet 4000 | Service Manual - Page 424
sheets more may leave the printer. Printer Indicates "Internal Paper Jam" After Power On ■ Verify that the stacker is not full. ■ Switch off the printer. To determine whether the problem is with the Output freely (refer to "Installing the Transport Module" in Chapter One). Troubleshooting 4-5 - HP LaserJet 4000 | Service Manual - Page 425
occured in the stacker, the printer reprints the jammed page(s) in the printer, but does not reprint the jammed page(s) in the stacker. The user should reprint the jammed pages in the stacker or the job that experienced the jam. Diagnostic Decision Charts This section contains four decision charts - HP LaserJet 4000 | Service Manual - Page 426
SENSOR IN TRANSPORT MODULE NO REGISTRATIO PROBLEM SEE PRINTER MANUAL &/OR STACKER MANUAL YES NO WHEELS TURN DLER ROLLERS KT NO DRIVE GEARS TURNIN NO 0 YES LOOK FOR BROKEN GEAR REPLACE TRANSPORT REPLACE TRANSPORT MODULE Figure 4-1. The Main Diagnostic Decision Chart Troubleshooting 4-7 - HP LaserJet 4000 | Service Manual - Page 427
1: Transport Mechanism Issues MOTOR HOT TURNING ] CHECK FOR SMALL DEBRIS IN GEAR TRAIN VERIFY ROLLERS ABILITY TO ROTATE l E r'' RETEST WOR REPLACE TRANSPORT Figure 4-2. The Transport Mechnism Diagnostic Chart 4-8 Troubleshooting - HP LaserJet 4000 | Service Manual - Page 428
EMPTY PAPER STACK, CLOSE DOOR ELEVATOR TRAVELS NO TO READY POSITION I PROBLEM t YES 11 FIXED VERIFY SENSOR ARM OPERATION YES ELEVATOR STUCK 0 TOP OR BOTTOM F TRAVEL MANUALLY MOVE W/ PULLY UNDER BASE PLATE RE-TEST CHECK FOR OBSTRUCTIONS 70 TRAVEL I CHECK ELEVATOR MOTOR i REPAIR/REPLACE - HP LaserJet 4000 | Service Manual - Page 429
TYPE & SIZE VERIFY OPERATION OF PAPER BRAKE I INSPECT EXIT ROLLER CONDITION & POSITION CLEAN & INSPECT PAPER PATH INSPECT RI TORSION & (Z) TENSION SPRINGS INSPECT SHAFT ASSEMBLIES RETEST OR REPLACI2 TRANSPORT MODULE AS NECESSARY Figure 4-4. The Registration Diagnostic Chart 4-10 Troubleshooting - HP LaserJet 4000 | Service Manual - Page 430
nut driver. Removal and Replacement of Spare Parts Basically, replacement is the reverse of removal unless otherwise noted. Transport Module Assembly Warning Switch off the printer, then of the Transport Module frame, above the paper path, by reaching inside the cabinet. Service and Parts 5-1 - HP LaserJet 4000 | Service Manual - Page 431
it protected by securing it into the slit in the stiff label, which is mounted on top of the Transport Module frame. When replacing the module, first configure the spare module by attaching the sensor arm and side covers. Latches Figure 5-1. Rear View of Transport Module and Electronic Box Side - HP LaserJet 4000 | Service Manual - Page 432
rear cover to the bottom guide. 3. Remove the 7mm nut that secures the E-box cover to the E-box. 4. Loosen the remaining 7mm nut. 5. Remove the Phillips screw that holds the side of the E-box to the frame. 6. Disconnect the cables from the E-box connectors shown in Figure 5-2. Service and Parts 5-3 - HP LaserJet 4000 | Service Manual - Page 433
7. Install the new E-box by reversing the previous steps. Output Stacker's Sensor Arm To replace the sensor arm, pry it off the shaft (using a flat blade screw driver) and clip on the new one. Make sure the sensor arm can float freely. See Figures 5-3 and 5-4 for more detail. 5-4 Service and Parts - HP LaserJet 4000 | Service Manual - Page 434
[ .- \ Sensor Arm Label Connector Figure 5-3. Interior View of Transport Module Figure 5-4. Detail View of Sensor Arm Service and Parts 5-5 - HP LaserJet 4000 | Service Manual - Page 435
blade screw driver to help pry the casters out, if necessary. ■ Mounting-Push the caster's shaft into the mounting slot. Caution Cloves are recommended to protect hands from injury. Note When replacing casters, note the position of casters with brakes and without brakes. 5-6 Service and Parts - HP LaserJet 4000 | Service Manual - Page 436
6 8 Stacker interface cable C2801-60003 9 User's Guide C2801-90003 10 Service Manual C2801-90002 11 Installation/Service Video (VHS/NTSC) 12 Installation/Service Video (VHS/PAL) O2801.90007 C2801-90008 13 Retrofit Kit for IIISi: Delivery RG5-0067-000CN Cover Assembly Service and Parts 5-7 - HP LaserJet 4000 | Service Manual - Page 437
~J - HP LaserJet 4000 | Service Manual - Page 438
Casters mounting, 1-3 Configuring the printer, 2-4 D Diagnostic decision charts, 4-6-10 Duplex paper guide, 1-8 E Electronic box, 5-3 Elevator removing, 4-2 Installation, 1-3-18 cabinet support plate, 1-5 casters, 1-3 duplex paper guide, 1-8 paper feeder power adapter, 1-9 paper feeder support shelf - HP LaserJet 4000 | Service Manual - Page 439
removal and replacement, 5-1 Printer alignment, 1-19 configuring, 2-4 Problem solving, 4-1-10 S Sensor arm, 1-15, 5-4 Sensor PCA, 1-12 Side covers, 5-2 Spare parts, 5-1 casters, 5-6 electronic box, 5-3 listing of parts, part numbers, 5-7 sensor arm, 5-4 side covers, 5-2 transport module assembly
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 |
 |
HP
LaserJet
IllSi
(HP
33491)
and
HP
LaserJet
4Si
(HP
C2010A)
Combined
Service
Manual
HEWLETT
PACKARD
HP
Part
No.
C2010-90939
Printed
in
USA
First
Edition
-
February
1993