Xerox 4400DT Service Manual
Xerox 4400DT - Phaser B/W Laser Printer Manual
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Xerox 4400DT manual content summary:
- Xerox 4400DT | Service Manual - Page 1
P h a s e r™ 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 2
- Xerox 4400DT | Service Manual - Page 3
PHASER™ 4400 LASER PRINTER Service Manual Warning The following servicing instructions are for use by qualified service personnel only. To avoid personal injury, do not perform any servicing other than that contained in the operating instructions, unless you are qualified to do so. First Printing: - Xerox 4400DT | Service Manual - Page 4
Service Terms Manual Terms Various terms are used throughout this manual to either provide additional information on a specific topic or to warn of possible danger the hazardous area. A personal injury hazard exists in the area where you see the sign. Phaser 4400 Laser Printer Service Manual iii - Xerox 4400DT | Service Manual - Page 5
while the printer is running. After turning off the power, wait 30 minutes. Avoid pinching fingers in the printer. Use caution to avoid personal injury. Use caution (or draws attention to a particular component). Refer to the manual(s) for information. iv Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 6
damaged I If any liquid or foreign material is spilled into the case I If the printer is exposed to any excess moisture I If the printer is dropped or damaged I If you suspect that the product needs servicing or repair I Whenever you clean the product Phaser 4400 Laser Printer Service Manual v - Xerox 4400DT | Service Manual - Page 7
and EPROM's carefully to avoid bending pins. I Pay attention to the direction of parts when mounting or inserting them on Printed Circuit Boards (PCB's). vi Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 8
laser radiation; this is possible only because the laser beam is totally enclosed during all modes of customer operation. When servicing the printer or laser unit, follow the procedures specified in this manual and there will be no hazards from the laser. Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 9
This printer uses heat to fuse the toner image to a sheet of paper. The Fuser Assembly is very hot. Turn the printer power OFF and wait at least 5 minutes for the Fuser to cool before you attempt to service the Fuser Assembly or adjacent components. viii Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 10
des Communications du Canada, NMB-003. Declaration of Conformity Xerox Corporation, declares, under our sole responsibility that the printer to which this declaration relates, is in conformity with the following standards and other normative documents: Phaser 4400 Laser Printer Service Manual ix - Xerox 4400DT | Service Manual - Page 11
for 250 cycles @ 50 Hz This product, if used properly in accordance with the user's instructions is neither dangerous for the consumer nor for the environment. A signed copy of the Declaration of Conformity for this product can be obtained from Xerox. x Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 12
responsible for the submittal of CE and CCIB. 2. The OEM customer shall be responsible for the Nordic agency approvals including NEMKO, SEMKO, SETI and DEMKO. Phaser 4400 Laser Printer Service Manual xi - Xerox 4400DT | Service Manual - Page 13
xii Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 14
3-1 Troubleshooting Procedures 3-2 Image-Quality Checkout Procedures 3-41 Image-Quality Troubleshooting Procedures 3-53 Tests Prints, Adjustments, and NVRAM Reset 4-1 Section Contents 4-1 Service Test Prints 4-1 Adjustments 4-5 Resetting NVRAM 4-7 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 15
Service Preventive Maintenance Procedure 5-1 FRU Disassembly 6-1 List of Procedures 6-1 Covers and Trays 6-6 Tray 1 6-18 Paper Feed (Tray 1 6-28 Paper Feed (MPT 6-44 Paper Transportation 6-57 Exit Assembly and Fuser 8-23 Interlocks 8-24 xiv Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 16
Laser Control 8-25 Fuser Control 8-26 Erase Cycle 8-28 Fan Control 8-28 Duplex Printing 8-29 Envelope Feeder 8-33 Stacker 8-37 Option 9-2 Base Engine Wiring Data 9-4 550-Sheet Feeder 9-22 Duplex Unit 9-26 Stacker 9-31 Envelope Feeder 9-37 Phaser 4400 Laser Printer Service Manual xv - Xerox 4400DT | Service Manual - Page 17
xvi Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 18
The Xerox Phaser™ 4400 Laser Printer Service Manual is the primary document used for repairing, maintaining and troubleshooting. To ensure complete understanding of the product, participation in Xerox Phaser 4400 Service Training is recommended. Section Contents Phaser 4400 Laser Printer Overview - Xerox 4400DT | Service Manual - Page 19
Phaser 4400B The Phaser 4400B is the base configuration laser printer. The printer comes standard with 32 Mbytes of memory, 600 x 600 dpi resolution, USB and Parallel support to 1200 x 1200 dpi. Phaser 4400DT The Phaser 4400DT includes all the features of the Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 20
Information If the printer must be returned to Xerox and the customer has not saved the shipping box and all internal packaging, a repackaging kit is available for order from the local Customer Support Center. Repackaging Kit: part number 065-0606-00 Phaser 4400 Laser Printer Service Manual 1-3 - Xerox 4400DT | Service Manual - Page 21
covered here in three groups: I Base configuration components I Internal components I Printer options Base Configuration Components 3 4 21 5 6 7 8 9 Front view of base 6. Multi-Purpose Tray extension 7. Power switch 8. Tray 1 9. Paper level gauge 1-4 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 22
2 3 4 5 6 7 Rear view of base configuration No. Description 1. Option Cover 2. Rear cover release 3. Rear cover (shown closed) 4. Parallel connector 5. USB connector 6. Ethernet connector 7. Power cord receptacle 8. Left cover 9. Ventilation slots 9 8 Phaser 4400 Laser Printer Service Manual 1-5 - Xerox 4400DT | Service Manual - Page 23
Fuser 4. Rear door (shown open) Printer Options The following customer-installed options are available for the Phaser 4400 printer user documentation, setup and care videos, and printer drivers. 550-Sheet Feeder 97S02878 Provides 550-sheet additional Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 24
1 2 5 3 4 Printer options No. Description 1. 500-Sheet Stacker 2. Envelope feeder 3. 550-sheet feeder with tray 2 4. 550-sheet feeder with tray 3 5. Automatic duplex unit s4400-346 Phaser 4400 Laser Printer Service Manual 1-7 - Xerox 4400DT | Service Manual - Page 25
, a display window and six functional keys. These keys navigate the menu system, perform functions and select modes of operation for the printer. The LED (light emitting diode) above the Graphics (select) Key INFO Key - for additional explanation or help 1-8 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 26
Panel Shortcuts Mode Skip execution of POST diagnostics Print Service Menu Map Reset PostScript NVRAM Enter Service Diagnostics Press this selection at power-on OK INFO BACK+OK When "Password" appears, press UP + DOWN keys within 2 seconds BACK+INFO Phaser 4400 Laser Printer Service Manual 1-9 - Xerox 4400DT | Service Manual - Page 27
6-88 for information on replacing the Image Processor Board. Inside the printer on the Image Processor board are four LEDs shown in the figure problem. DS390 is the CHECK STOP indicator, which illuminates when various fatal errors occur in the CPU. 1-10 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 28
Rear Panel Configuration Interfaces I IEEE 1284 parallel I Ethernet 10/100BaseTx I USB On the Ethernet port, the green LED is a RECEIVE DATA indicator and the Information The processor used on the Image Processor board is a 266 MHz PowerPC processor. Phaser 4400 Laser Printer Service Manual 1-11 - Xerox 4400DT | Service Manual - Page 29
Machine Orientation For servicing the Phaser 4400 Laser Printer, all references to machine orientation are as illustrated below. Machine Orientation 1-12 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 30
and items in this map marked with a numbered footnote do not appear on the front panel display unless the associated option is installed in the printer. Items in this map marked with an asterisk (*) do not appear on the base configuration 4400B. Phaser 4400 Laser Printer Service Manual 1-13 - Xerox 4400DT | Service Manual - Page 31
25 in.) Weight: 25 Kg (55 lbs.) Packaged Weight: 32.7 kg (72 lbs.) Printer clearances Clearances Top (to closest overhead object): Left: Right: Front: Rear: Mounting surface flatness baseline paper: Xerox 4200/4024 20 lb. Letter and RX 80 A4 (3R91720). 1-14 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 32
(one-sided) printing only. (2) Maximum capacity at 75 g/m2(20 lb.) paper stock. Capacity is reduced for heavier/thicker stock. s4400_351 Paper Tips Page 1 of 3 Phaser 4400 Laser Printer Service Manual 1-15 - Xerox 4400DT | Service Manual - Page 33
Paper weights The PhaserTM 4400 Laser Printer supports paper weights as follows: windows or metal clasps. • Label media should be fanned prior to loading. • Do not print to label stock once a label has been removed. s4400_352 Paper Tips Page 2 of 3 1-16 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 34
Print Cartridge High-Capacity Print Cartridge Maintenance Kit Contains: a Fuser Cartridge, 1 Transfer Roll, and 9 Feed Rollers. s4400_353 Paper Tips Page 3 of 3 Part Number 113R00627 113R00628 108R00497 for 110 V (60 Hz) 108R00498 for 220 V (50 Hz) Phaser 4400 Laser Printer Service Manual 1-17 - Xerox 4400DT | Service Manual - Page 35
Simp Dup 9.2 15.5/ 7.7 14.0/ 16.3 14.8 9.3 15.7/ 7.8 15.9/ 17.1 17.3 From a cold start (22° C / 71.6° F ambient temperature) to READY TO PRINT within 70 seconds. 1-18 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 36
or 68 Btus/hour Note: No electrical power is supplied to the Fuser assembly in Power Saver Mode. Environmental Specifications Characteristic Operating environment Storage than 0.02 mg/m3 concentration, measured in accordance with BAM Standard. Phaser 4400 Laser Printer Service Manual 1-19 - Xerox 4400DT | Service Manual - Page 37
1-20 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 38
is operating correctly. Refer to Service Diagnostics on page 2-7. To troubleshoot problems not associated with a front panel error message or code such as ac power, or problems related to print-quality, refer to the section Troubleshooting on page 3-1. Phaser 4400 Laser Printer Service Manual 2-1 - Xerox 4400DT | Service Manual - Page 39
instructed in the appropriate troubleshooting procedure. 5. Use the Engine Logic Board Test Print on page 3-49, to isolate print capability problems printer to be sure you have corrected the initial problem and there are no additional problems present. 2-2 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 40
component. The section FRU Disassembly on page 6-1 provides detailed steps for removing and replacing all major parts of the printer. The section Parts Lists on page 7-1 details the location, quantity and part number for all spared parts of the printer. Phaser 4400 Laser Printer Service Manual 2-3 - Xerox 4400DT | Service Manual - Page 41
be difficult or impossible to read on the average multi-meter. 7. When a Troubleshooting Procedure instructs you to replace a non-spared component and that component is part of a Stated Measured +24.0 VDC +21.6 to +26.4 VDC 0.0 VDC Less than +0.5 VDC 2-4 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 42
IP address, view the printer's web page using a web browser. a. Open a web browser. b. Enter the printer's IP address as the URL. c. Select the "Jobs" tab and click the Usage Profile link. You can then click a link to view or to print the Usage Profile. Phaser 4400 Laser Printer Service Manual 2-5 - Xerox 4400DT | Service Manual - Page 43
Fault Error History Code 0 Fan Failure (U5) 1 Fuser Failure (U4) 2 Motor Failure (U1) 3 IOT NVM Failure (U6) 4 Stacker Failure (E9) 5 Laser failure (U2) Fault History Code Error 6 Tray 2/3 -2 19 PSE-1 20 E3-1 21 E3-2 22 E7-0 2-6 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 44
Sensor Checkout on page 3-23. Solenoid Tests - Tests the functionality of printer solenoids. Clutch Tests - Tests the functionality of printer clutches. Engine NVRAM Adjustments - Perform NVRAM adjustments essential to the performance of the printer. Phaser 4400 Laser Printer Service Manual 2-7 - Xerox 4400DT | Service Manual - Page 45
Only: The Service menu functions are to be used by Xerox service personnel and authorized service providers. The printer can be damaged by improper use of the built-in service tests. Envelope Feeder Presence Duplex Unit Presence Stacker Unit Presence 2-8 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 46
a menu and selecting Exit takes you back to the Service Diagnostics Main Menu. When you select Read Fuser Temperature from the General Status menu, the temperature is presented 8F 200°C / 392°F 85 210°C / 410°F 7C 220°C / 428°F 72 230°C / 446°F Phaser 4400 Laser Printer Service Manual 2-9 - Xerox 4400DT | Service Manual - Page 47
also appear as secondary headings in the Troubleshooting Procedures.) Printing resumes after the problem has been fixed. Engine NVRAM Default 0 - 8 MPT Scan Direction 6 0 - 8 Duplex Process 8 Direction Duplex Scan Direction 4 0 - 15 0 - 8 2-10 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 48
. Replace Print Cartridge. Toner is Low. Maintenance Kit is Near End of Life. Printer Option Errors Install or Reseat . Code: E11 Main Motor Failure. Code: U1 Laser Unit Failure. Code: U2 Fuser Failure. Code: U4 Phaser 4400 Laser Printer Service Manual Page 2-18 2-21 2-22 2-23 2-25 2- - Xerox 4400DT | Service Manual - Page 49
part of the Help information displayed when you press i. Front Panel Diagnostic Message Message Error Description Troubleshooting Procedure Jam At Tray [#]; Open Tray [#] and Front Cover to Clear. Press i. E2- Front Cover to Clear. on page 2-22. 2-12 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 50
Troubleshooting Procedure Jam at Front; Open Front Cover to Clear. Press i. E3-1: Registration Jam Paper Late to Fuser Clear Paper Path. Open Printer Rear Cover. Clear Paper Path. Go to Jam at Stacker; Open Both Rear Covers to Clear. on page 2-27. Phaser 4400 Laser Printer Service Manual 2-13 - Xerox 4400DT | Service Manual - Page 51
Service Diagnostics while printing Engine Test Prints. The code numbers in these messages also appear as part of the Help information displayed when you press i. Front Panel Diagnostic Message Message Error Description Troubleshooting Harness problem I Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 52
Service Diagnostics while printing Engine Test Prints. The code numbers in these messages also appear as part of the Help information displayed when you press i. Front Panel Diagnostic Message Message Error Description Troubleshooting on page 2-52. Phaser 4400 Laser Printer Service Manual 2-15 - Xerox 4400DT | Service Manual - Page 53
specified value for 10 sec. + t1. 2. The laser power does not reach the specified value. 3. Laser signal intervals become longer than the Fail time interval after Laser warm-up is completed. Power Off and On. Go to Laser Unit Failure. on page 2-48. 2-16 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 54
Description Troubleshooting Procedure Fuser Failure Press i. U4 Fuser Fail/Power Off I Low temperature trouble/Power off (Fuser temperature drops below the set temperature after the Fuser warm- . Go to Engine Logic Board NVRAM Failure. on page 2-50). Phaser 4400 Laser Printer Service Manual 2-17 - Xerox 4400DT | Service Manual - Page 55
Jam/Misfeed Troubleshooting Procedure Step Service Diagnostics and select Test Print. 2. Run five prints from every paper tray. Go to step 9. Go to step 4. Does the problem appear when printing from Tray 2 or 3? 4 1. Remove Tray 1 from the printer Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 56
Paper Jam/Misfeed Troubleshooting Procedure (cont'd.) Tray 2. Check the paper chute at Go to step Remove the front of both trays (the chute guides paper from 15. obstructions Tray 3 to the Tray 2 turn rolls and from Tray 2 to (PL 2.1 on page 7-6). Phaser 4400 Laser Printer Service Manual 2-19 - Xerox 4400DT | Service Manual - Page 57
parts. Replace the paper tray if necessary (PL 2.1 on page 7-6). 20 Replace the Feeder PWB (RRP 11.9 on page 6-128). If the problem persists, replace in this order: I Size PWB (RRP 11.19 on page 6-139) I Engine Logic Board (RRP 9.3 on page 6-89) 2-20 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 58
does not arrive at Registration Sensor position within a specified time. Envelope Feeder Jam Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Remove all envelopes. Go Replace the Envelope Feeder PWB (RRP 13.3 on page 6-159). Phaser 4400 Laser Printer Service Manual 2-21 - Xerox 4400DT | Service Manual - Page 59
Envelope Feeder Jam Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 7 Perform Registration Sensor on page 3-20 to check the bly (RRP 8.2 on page 6-85), or Main Mo- tor Assem- bly (RRP 8.1 on page 6-84) as neces- sary. 2-22 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 60
the Fuser Idler Gear rotate smoothly? Go to step 4. Replace the Fuser Assembly (RRP 6.2 on page 6-66). 4 Check the paper in all trays. Is the paper loaded in the paper trays damp, wrinkled, or damaged? Replace with Go to step 5. fresh, dry paper. Phaser 4400 Laser Printer Service Manual 2-23 - Xerox 4400DT | Service Manual - Page 61
Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 5 Is the paper size used within specifications? Go to step 6. Replace with paper meet- ing size speci- fications. 6 1. Reinstall the Fuser Assembly (RRP 6.1 on page 6-65). 2-24 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 62
Troubleshooting end guide touches Fuser Access Cover. Go to step 5. Repair 2. Check the Exit Sensor Actuator. actuator or Does the actuator move freely and return to the home position when released? replace the Fuser Assembly (RRP 6.2 on page 6-66). Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 63
(PL 7.1 on page 7-18). Go to step 10. Clean or replace the Fuser Assembly (RRP 6.2 on page 6-66), as necessary. Replace the Engine Logic Board (RRP 9.3 on page 6-89). Clean or replace the Transport Chute as necessary (RRP 6.1 on page 6-65). 2-26 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 64
Sensor. Stacker Jam Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Open the printer Rear Cover and ). Stacker Exit Sensor (RRP 10.11 on page 6-111). If the problem persists, replace the Stacker PWB (RRP 10.7 on page 6-107). Phaser 4400 Laser Printer Service Manual 2-27 - Xerox 4400DT | Service Manual - Page 65
, replace the Engine Logic Board (RRP 9.3 on problem persists, replace the Stacker PWB (RRP 10.7 5. Remove then replace the Rear Cover Interlock page 6-89). on cheater. page 6-107). Does the Exit Gate toggle at the completion of each reset? 2-28 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 66
Sensor. Duplex Jam Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Open the printer and check for paper 3 1. Reinstall the Duplex Unit and enter Service Clear the jam Problem Diagnostics. and press solved. 2. Select Engine Phaser 4400 Laser Printer Service Manual 2-29 - Xerox 4400DT | Service Manual - Page 67
paper detected by the printer, and the length of time the Registration Sensor is actuated. Paper Size Error Troubleshooting Procedure Step Actions and Questions 1 Does the problem appear when using Tray of paper actually installed, then press OK. 2-30 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 68
. 3. Open and close the Rear Cover. Does the message on the display alternate between "Closed" and "Open" as you open and close the Rear Cover? Phaser 4400 Laser Printer Service Manual 2-31 - Xerox 4400DT | Service Manual - Page 69
LVPS. 2. Switch the printer power-on. 3. On the Engine Logic Board, check the voltage between P/J28 pin 1 and frame ground. Is the voltage +24 VDC? Replace the Engine Logic Board (RRP 9.3 on page 6-89). Replace the LVPS (RRP 9.5 on page 6-91). 2-32 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 70
Troubleshooting Procedure Xerox Phaser 4400 Print Replace the Replace Cartridge? Print Print Cartridge Cartridge Sensor with a Xerox Assembly Phaser 4400 together with Print the harness Cartridge (PL (RRP 7.4 on 8.1 on page 6-81). page 7-20). Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 71
in a low toner condition. Print Cartridge Low Toner Troubleshooting Procedure Step Actions and Questions Yes No 1 Install a new Print Cartridge. Go to step 2. Problem Does the Replace 9.7 on page 6-94). Logic Board (RRP 9.3 on page 6-89). 2-34 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 72
almost empty. Print Cartridge Low Toner Troubleshooting Procedure Step Actions and Questions Yes No 1 Install a new Print Cartridge. Go to step 2. Problem Does the Replace Print Cartridge on page 6-94). Logic Board (RRP 9.3 on page 6-89). Phaser 4400 Laser Printer Service Manual 2-35 - Xerox 4400DT | Service Manual - Page 73
Logic Board (RRP 9.3 on page 6-89). Go to step 3. Replace the Duplex PWB (RRP 12.4, page 6-144). If the problem persists, replace the Engine Logic Board (RRP 9.3 on page 6-89). Replace the Duplex Harness Assembly, J32/P341 (RRP 9.12, page 6-99). 2-36 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 74
(RRP 1.2 on page 6-7), and the Left Plate (RRP 1.11 on page 6-16). 3. Switch the Printer power-on. 4. Check the voltage on the Engine Logic Board Feeder PWB (RRP 13.3 on page 6-159). between P/J23 Pin 4 and frame ground. Is the voltage 0.0 VDC? Phaser 4400 Laser Printer Service Manual 2-37 - Xerox 4400DT | Service Manual - Page 75
Output Tray Full) Error message indicates the output tray is full. Output Tray Full Troubleshooting Procedure Step Actions and Questions 1 Is there a paper stack in the standard bin RRP 6.6 on page 6-72), as necessary. Go to step 5. Problem solved. 2-38 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 76
Tray Assembly is below 50 ±30 sheets. Low Paper Troubleshooting Procedure Step Actions and Questions Yes No 1 Fill the Problem solved. 2 1. Remove the affected tray Assembly. Go to step 3. Repair or 2. Push up the Low Paper Actuator manually Phaser 4400 Laser Printer Service Manual 2-39 - Xerox 4400DT | Service Manual - Page 77
on page 6-89). Low Paper Sensor (RRP 11.14, page 6-133) for the affected tray. If the problem Does the voltage change from +3.3 VDC to 0.0 VDC? persists, replace the Feeder PWB (RRP 11.9, page 6-128) then the Size PWB (RRP 11.19, page 6-139). 2-40 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 78
the printer. Go to step 10. Go to Tray Remove all paper from the tray. Reinsert Motor Assembly the Tray into the printer. From the rear of Checkout on the printer, watch the tray bottom plate. page 3-26. Is the Bottom Plate raised fully and evenly? Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 79
time the Registration Sensor is actuated. Paper Size Error Troubleshooting Procedure Step Actions and Questions Yes No 1 Does the problem appear when using Tray 1, 2, Go to step tray end guide is moved. 2.1 on page 7-6/PL 11.1 on page 7-26). 2-42 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 80
Assembly (Tray 1, 2, or 3) is not in place. Tray Failure Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics, 2. Print a test print from every tray. Go to step the two pins? (PL 9.1 on page 7-22). Phaser 4400 Laser Printer Service Manual 2-43 - Xerox 4400DT | Service Manual - Page 81
Tray Failure Troubleshooting Procedure (cont'd.) Step and reinstall the Tray indicated. Does the C3 error code still appear? Go to step 12. Problem solved. 12 1. Exchange Tray 1 with the Tray generating the "C3" Go to step Go to on page 7-27). 2-44 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 82
problem with the Main Motor. Main Motor Failure Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Switch the printer Manually rotate the rotor of motor clockwise. Print Does the rotor of the Main Motor rotate Cartridge. smoothly? Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 83
Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 3 1. Remove the Fuser Assembly (RRP 6.2 on Replace the Go to step 4. page 6-66). 2. Manually rotate the rotor of the Motor clockwise. Fuser 6-29 or RRP 11.8, page 6-127). 2-46 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 84
Main Motor Failure Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 9 Scroll to Motor+Registration and press OK. Go to Motor Assembly on page 3-15. Repair or replace the Tray 3 Feed Clutch or Feed Shaft (RRP 3.6, page 6-33). Phaser 4400 Laser Printer Service Manual 2-47 - Xerox 4400DT | Service Manual - Page 85
Install P25 pin 3 and frame ground. Engine Logic or Reseat Is the voltage +5.0 VDC? Board (RRP Print 9.3 on Cartridge. on page 6-89). page 2-33. 2-48 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 86
to Fuser Problem Assembly on solved. page 3-18. Fan Failure; Power Off Now. (U5 Fan Fail/Power Off) The printer is detecting incorrect fan rotation. Fan Failure Troubleshooting Procedure Step ? 9.5 on Board (RRP page 6-91). 9.3 on page 6-89). Phaser 4400 Laser Printer Service Manual 2-49 - Xerox 4400DT | Service Manual - Page 87
Logic Board (RRP 9.3 on page 6-89). Go to step 2. 2 To ensure that the problem is solved, switch the printer Replace the Problem power OFF and ON several times. Engine Logic solved. Does the error message reappear? Board (RRP 9.3 on page 6-89). 2-50 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 88
Empty) Load MPT Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select Sensor press working and release the actuator? correctly. If a problem persists, replace the Engine Logic Board (RRP 9.3 on Phaser 4400 Laser Printer Service Manual 2-51 - Xerox 4400DT | Service Manual - Page 89
or 3 Failure Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Check the alignment of the printer to the 550- 3.13 on Is the voltage +24 VDC? page 6-42). If the problem persists, replace the Tray 1 Feeder PWB (RRP 3.9 on page 6-36 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 90
2 or 3 Failure Troubleshooting Procedure (cont'd.) Step the paper tray is inserted? 3.13 on as page 6-42). If necessary. the problem persists, replace the Tray 1 Feeder PWB (RRP 3.9 on page 6-37). 8 Check Board (RRP 9.3 on page 6-89). Phaser 4400 Laser Printer Service Manual 2-53 - Xerox 4400DT | Service Manual - Page 91
the problem Troubleshooting Procedure Step Actions and Questions Yes No 1 Is there a paper stack in the offset bin actuating Remove the Go to step 2. the Stack Full Sensor? paper stack. 2 Is the paper curled? Go to step 4. Go to step 3. 2-54 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 92
Envelope Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Printer power-on. 4. On the Engine Logic Board check the voltage Envelope Feeder. on page 2-37. between P/J23 Pin 4 and the frame ground. Is the voltage 0.0 VDC? Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 93
Load Envelope Troubleshooting Procedure (cont'd.) Step Feeder PWB (RRP 13.3 on page 6-159). Is there continuity between the pins? If the problem persists, replace the Envelope Feeder No Paper Sensor (RRP 13.10 on page 6-166). 5 page 6-94). 2-56 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 94
Troubleshooting Procedure Xerox Phaser 4400 Print Replace the Replace Cartridge? Print Print Cartridge Cartridge Sensor with a Xerox Assembly Phaser 4400 together with Print the harness Cartridge (PL (RRP 7.4 on 8.1 on page 6-81). page 7-20). Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 95
operating system, and do not prevent it from initializing and becoming available as a tool for troubleshooting. Soft faults are reported on the Startup Page after the system is running. Fault Reporting LED and the front panel LED toggle continuously. 2-58 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 96
parallel port failure, USB port failure, PORT Xerox Image Enhanced VDMA failure. Image Processor Board Timer failure. Go to Image Processor Isolation on page 3-31. Continuous 1/2 RAM Error second interval Go to 15: RAM DIMM (RAM Error) on page 2-60. Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 97
DIMM Troubleshooting Procedure Step Actions and Questions 1 1. Switch the printer Problem solved. Go to step 3. Install a new RAM DIMM (PL 10.1 Electrical on page 7-24). Problem solved. Install a new RAM DIMM (PL 10.1 Electrical on page 7-24). 2-60 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 98
troubleshooting procedures: I Troubleshooting procedures for problems not directly associated with error messages or codes I Troubleshooting Procedures for Image-quality (IQ) problems Troubleshooting procedures will normally isolate a problem +0.5 VDC Phaser 4400 Laser Printer Service Manual 3-1 - Xerox 4400DT | Service Manual - Page 99
machine to the wall outlet. Advise the customer that a licensed electrician must correct the wiring. Do not attempt to correct the wiring yourself. If you later find the condition has not been corrected, inform your manager in writing of the improper wiring. 3-2 Phaser 4400 Laser Printer Service - Xerox 4400DT | Service Manual - Page 100
power cord. Power power cord 2. The measurement should be less than 10 ohms for each connection. (LVPS)" ("PL 10.1 Electrical"). Does continuity test per specification? Phaser 4400 Laser Printer Service Manual 3-3 - Xerox 4400DT | Service Manual - Page 101
. DC (LVPS) Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Switch printer power OFF. Go to printer power OFF. Problem Replace the 2. Replace fuse F1 (125 V - 10 A / 250 V - 3 A). solved. LVPS (RRP 3. Switch the printer 6-91). 3-4 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 102
Service Flowchart on page 2-2 or to the procedure that sent you here. Go to DC Power Loading on page 3-6. LVPS Voltages Red Lead P/J281 pin 7 P/J281 pin 10 P/J281 pin 1 Black Lead Frame Ground Frame Ground Frame Ground Voltage +5.0 VDC +3.3 VDC +24.0 VDC Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 103
1 PWB) I P/J34 (Duplex PWB) I P/J35 (Stacker PWB) 4. Switch the printer power ON and measure the voltages listed in Step 2, sub-steps 2 through 4. Are all the voltages correct? Go to step 5. Replace the Engine Logic Board (RRP 9.3 on page 6-89). 3-6 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 104
Reconnect one of the disconnected plugs. step with the component 3. Switch the printer power ON. 4. Measure the voltages listed in Step 2, sub-steps 2 through 4. next just disconnected connected to plug. the LVPS. Are all the voltages correct? Phaser 4400 Laser Printer Service Manual 3-7 - Xerox 4400DT | Service Manual - Page 105
Toner Sensor Failure Troubleshooting Procedure Step Actions and Questions Yes No 1 Print a Test Print. Inspect the print quality. Is the print light? Go to step 2. Return to Service with the print cartridge removed. PWB (RRP 9.7 on page 6-94). 3-8 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 106
printer power OFF. Go to step 7. Replace the 2. Disconnect J910 from the Image Processor Board. LVPS (RRP 3. Switch the printer power ON. 4. Check the voltage between pins 1 and 2 on the disconnected plug. 9.5 on page 6-91). Is the voltage +3.3 VDC? Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 107
13 1. Switch the printer power OFF. 2. Reinstall the removed options one at a time, switching on the power and checking for 3.3 VDC on J910 between pins 1 and 2 after each one is installed. 3. Replace the option just installed when the voltage fails. 3-10 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 108
the printer power ON. 4. Check the voltage between pins 1 and 2 on the disconnected plug. Is the voltage +3.3 VDC? Yes No Go to step 8. Go to step 2. Go to step 5. Go to step 3. Replace the Image Processor Board (RRP 9.2 on page 6-88). Go to step 4. Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 109
Front Panel Display Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 4 On the If the problem persists, replace the Image Processor solved. Return to Service Flowchart on page 2-2 and restart. Board (RRP 9.2 on page 6-88). 3-12 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 110
Printer Operation Erratic Printer Operation Troubleshooting Procedure problem still appear? Go to Electrical Noise on page 3-33. Problem solved. 4 Does the printer RESET while generating test Go to Power Go to step 5. print? Supply on page 3-14. Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 111
Replace the 2. Reconnect one of the plugs disconnected in step 1. 3. Switch the printer power ON. 4. Measure the voltages listed in step 1. step with the component next just disconnected connected to Are all voltages correct? plug. the LVPS. 3-14 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 112
and Questions Yes No 1 1. Enter Service Diagnostics and select the Motors/Fan Problem Go to step 2. Test. 2. Scroll to Main Motor and press OK. solved, return to Does the Main Motor rotate? Service Flowchart on page 2-2 and continue. Phaser 4400 Laser Printer Service Manual 3-15 - Xerox 4400DT | Service Manual - Page 113
Main Motor Assembly Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 2 1. Switch the printer power OFF. Go to step 9. Go to step 3. 2. Remove the Left Interface on page 6-89). Does the voltage drop from +5.0 VDC to 0.0 VDC? 3-16 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 114
Laser Assembly Laser Assembly Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Laser Scan Motor test. Assembly (RRP 7.4 on page 6-82). Board (RRP 9.3 on page 6-89). Does the voltage drop from +5.0 VDC to 0.0 VDC? Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 115
3. Measure the resistance between pins B3 and B4 of P272 on the Fuser Assembly (refer to the figure). Cover (RRP 6.9 on page 6-77). Is the resistance between 7K and 380K ohms (depending on the temperature of the fuser)? P272 Fuser Connector (P272) 3-18 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 116
the voltage on the LVPS between P/J281 pin 12 and frame ground as you switch the printer power ON. LVPS (RRP 9.5 on page 6-91). Engine Logic Board (RRP 9.3 on Is the voltage 0.0 VDC during fuser warm-up, page 6-89). then does it change to 2.8 VDC? Phaser 4400 Laser Printer Service Manual 3-19 - Xerox 4400DT | Service Manual - Page 117
Registration Sensor Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics " to "Without Paper" as you press and release the actuator? problem persists, replace the Engine Logic Board (RRP 9.3 on page 6-89 3-20 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 118
No Paper Sensor Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and as you press and release the actuator? correctly. If a problem persists, replace the Engine Logic Board (RRP 9.3 on page 6-89). Phaser 4400 Laser Printer Service Manual 3-21 - Xerox 4400DT | Service Manual - Page 119
correctly. If a alternate between With Paper and Without Paper problem as you press and release the actuator? persists, replace Tray Full Sensor Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 120
Output Tray Full Sensor Troubleshooting Procedure (cont'd.) Step the tray from the feeder demonstrating a Go to step 3. Go to step 2. problem. 2. Release the sensor from the feeder frame but do not disconnect the plug 14 in PL 3.1 on page 7-10) Phaser 4400 Laser Printer Service Manual 3-23 - Xerox 4400DT | Service Manual - Page 121
top of the connector when the sensor is installed in the printer. Print Cartridge Sensor Assembly Print Cartridge Sensor Assembly Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Open Sensor Assembly (RRP 7.3 on page 6-81). 3-24 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 122
Print Cartridge Sensor Assembly Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 3 1. Enter Service Diagnostics and select Sensor Tests. Replace the Go to Print Cartridge in? together with the harness (RRP 7.3, page 6-81). Phaser 4400 Laser Printer Service Manual 3-25 - Xerox 4400DT | Service Manual - Page 123
Assembly Checkout Procedure Step Actions and Questions Yes No 1 1. Switch the printer power OFF. Go to step 2. Go to DC 2. Remove the Paper Tray to be tested. Power 3. Switch and without damage? Assembly (RRP 2.4 on page 6-24). necessary. 3-26 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 124
drop from +24 VDC to page 6-62) page 6-89). 0.0 VDC? 6 1. Switch the printer power OFF. Problem 2. Open the Front Cover and remove the Print solved. Cartridge. 3. With the Front Cover open, 6-62) or Registration Rolls (RRP 5.6 on page 6-62). Phaser 4400 Laser Printer Service Manual 3-27 - Xerox 4400DT | Service Manual - Page 125
Assembly Turn Roller Clutch Assembly Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select Clutch problem persists, replace the Engine Logic Assembly (RRP 3.2). Board (RRP 9.3 on page 6-89). 3-28 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 126
PWB. Tray 1 Feed Clutch Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select Clutch Tests. Replace problem persists, replace the Clutch (RRP 3.6 on page 6-33). Size PWB (RRP 3.13 on page 6-42). Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 127
and press OK. Do the MPT Feed Rolls make one complete revolution then stop? Pick Up Solenoid appears to operate correctly. If the problem persists, replace the Engine Logic MPT Pick Up Solenoid (RRP 4.9 on page 6-55). Board (RRP 9.3 on page 6-89). 3-30 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 128
printer boot up correctly and is Ready option or installed. displayed on the Front Panel? cable until the problem is found. High-Voltage Power Supply (HVPS) Assembly HVPS Assembly Troubleshooting Cartridge (PL 8.1 on page 7-20) as necessary. Phaser 4400 Laser Printer Service Manual 3-31 - Xerox 4400DT | Service Manual - Page 129
correct? Problem solved. Go to step 5. 5 1. Replace the Engine Logic Board (RRP 9.3 on Problem page 6-89). solved. 2. Cheat the Front Cover Interlock Switch. 3. Enter Service Diagnostics Bushing 0 VDC Detack Saw Detack Saw -930 ± 100 VDC 3-32 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 130
. securing screws or replace the Are the securing screws tight and the lead wires Fuser in good condition? Assembly (RRP 6.2 on page 6-66). 7 Disconnect the HVPS 9.3 on page 6-89). Is the problem still present? Go to step 9. Problem solved. Phaser 4400 Laser Printer Service Manual 3-33 - Xerox 4400DT | Service Manual - Page 131
the voltage between P/J27 pin 5 and frame ground as you block and unblock the Fuser Exit Sensor. Board (RRP 9.3 on page 6-89). Assembly (RRP 6.2 on page 6-66). Is the voltage 3.3 VDC when the Fuser Exit Sensor is blocked and 0.0 VDC when unblocked? 3-34 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 132
Motor Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Switch the printer power OFF. Go to step 2. Remove the 2. Open the Rear Cover and manually rotate pins 1 and 4, and between pins 1 and 5. Are all readings 25 to 35 ohms? Phaser 4400 Laser Printer Service Manual 3-35 - Xerox 4400DT | Service Manual - Page 133
). 7 If the problem persists, replace the following in order until the problem is found: I Engine Logic Board (RRP 9.3 on page 6-89) I Feeder PWB (RRP 11.9, page 6-128) I Size PWB (RRP 11.19, page 6-139) I Paper Feed Clutch (RRP 11.10, page 6-129) 3-36 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 134
on page 6-113). Is there +3.3 VDC between P/J35 pin 2 and frame ground when the Stack Full Sensor is deactuated and 0.0 VDC when actuated? If the problem persists, replace the Stacker PWB (RRP 10.7 on page 6-107). Phaser 4400 Laser Printer Service Manual 3-37 - Xerox 4400DT | Service Manual - Page 135
1 and frame ground. 6. Press OK. Does the voltage pulse from 0.0 VDC to 3.3 VDC then return to 0.0 VDC? No Go to step 2. Go to step 3. 3-38 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 136
printer incorrectly indicates a No Paper condition in the Envelope Feeder, or fails to indicate a No Paper condition in the Envelope Feeder. Envelope No Paper Sensor Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service ). Phaser 4400 Laser Printer Service Manual 3-39 - Xerox 4400DT | Service Manual - Page 137
Envelope No Paper Sensor Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 4 1. Switch the Printer power OFF and remove 6-159). If the problem persists, replace the Envelope Feeder No Paper Sensor (RRP 13.10 on page 6-166). 3-40 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 138
problems. Image-Quality Defect Definitions Defect Definitions Go To: LIGHT PRINTS: The overall image density is too light. page 3-54 BLANK PRINTS: Prints with no visible image. page 3-56 BLACK PRINTS: The print is completely covered with toner . Phaser 4400 Laser Printer Service Manual 3-41 - Xerox 4400DT | Service Manual - Page 139
STREAKS: Extraneous dark lines/bands in the direction of scan. page 3-65 SPOTS: There are spots of toner on the page. page 3-68 UNFUSED IMAGE: Part of or all of the image is unfused. Refer and retain the remaining prints for image-quality analysis. 3-42 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 140
Test Print Phaser 4400 Laser Printer Service Manual 3-43 - Xerox 4400DT | Service Manual - Page 141
there Spot Deletions present? Go to Spot Deletions on page 3-73. No Go to Fusing. Go to step 3. Go to step 4. Go to Fusing. 3-44 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 142
at 15% relative humidity to 95° F (35° C) at 85% relative humidity. The fusing performance of the printer will vary according to the environment. I A cold environment will affect the warm-up time. I The weight ( . No Go to page 3-69 Unfused Image. Phaser 4400 Laser Printer Service Manual 3-45 - Xerox 4400DT | Service Manual - Page 143
specification? The printed test patterns meet the Resolution specification. Go to Registration (Side-to-Side) on page 3-47. Go to Resolution on page 3-72. 3-46 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 144
meet the side to side registration specification. Go to Registration (Lead Edge-to-Trail Edge) on page 3-48. No Go to Registration on page 3-81. Phaser 4400 Laser Printer Service Manual 3-47 - Xerox 4400DT | Service Manual - Page 145
printed test patterns meet the lead edge-to-trail edge registration specification. Go to Skew on page 3-49. Go to Registration on page 3-81. 3-48 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 146
Skew Engine Logic Board Test Print Actions and Questions Yes No 1. Enter Service Diagnostics, select Engine Test Print, and press OK. 2. Scroll to Print Test Pattern and Skew specification. Go to "Skips / Smears". Go to Skewed Image on page 3-79. Phaser 4400 Laser Printer Service Manual 3-49 - Xerox 4400DT | Service Manual - Page 147
shown in the figure. Is the pattern free from skips and smears? Go to the Spots checkout. No Go to page 3-83 Skips/Smears. 3-50 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 148
free of spots or the spots that are visible fall within the acceptable range. Go to Other Print Defects. No Go to page 3-68 Spots. Phaser 4400 Laser Printer Service Manual 3-51 - Xerox 4400DT | Service Manual - Page 149
(ghost) on the Test Print? Go to page 3-75 Residual Image. Go to step 4. 4 Is there paper damage: wrinkles, creases, tears, Go to The printer etc.? page 3-71 meets Damaged specifications. Prints. Return to Service Flowchart on page 2-2. 3-52 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 150
image-quality problem, return to Image-Quality Checkout Procedures on page 3-41 to verify that no other image-quality defects exist. Index of Image-Quality Troubleshooting Procedures 3-78 Skewed Image 3-79 Registration 3-81 Skips / Smears 3-83 Phaser 4400 Laser Printer Service Manual 3-53 - Xerox 4400DT | Service Manual - Page 151
Cartridge Side Guide. clean the Metal Grounding Is the Metal Grounding Contact intact and free Contact, so it of contamination? makes better contact with the drum shaft, or replace the Print Cartridge Side Guide (RRP 7.5 on page 6-83). 3-54 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 152
HVPS) Assembly on page 3-31) 9 Replace in order until the problem is solved: I HVPS PWB (RRP 9.6 on page 6-92), I Laser Assembly (RRP 7.4 on page 6-82), I Engine Logic Board (RRP 9.3 on page 6-89), I Transport Chute Assembly (RRP 6.1 on page 6-65). Phaser 4400 Laser Printer Service Manual 3-55 - Xerox 4400DT | Service Manual - Page 153
, replace the cessor Board Image Processor (RRP 9.2 on Board (RRP 9.2 page 6-88). on page 6-88). 3 1. Install a new Print Cartridge. 2. Print a test print as in Step 1. Problem solved. Go to step 4. Is there a normal image on the paper? 3-56 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 154
or replace the Print Cartridge Side Guide (RRP 7.5 on page 6-83). Replace the Print Cartridge Side Guide (RRP 7.5 on page 6-83). Replace the Transfer Roller Assembly (RRP 7.1 on page 6-79). Go to High-Voltage Power Supply (HVPS) Assembly on page 3-31. Phaser 4400 Laser Printer Service Manual 3-57 - Xerox 4400DT | Service Manual - Page 155
Print. Is the print normal? Problem solved. Go to step 2. 2 Shield half of the window of the Laser Assembly. Print a Go to Laser Go to Test Print. Assembly on Electrical Is the print half white and half black? page 3-17. Noise on page 3-33. 3-58 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 156
? 3 Inspect the laser beam path between the Laser Assembly and the Drum. Is the laser beam path free of obstructions? Go to step 2. Problem solved. Go to step 3. Problem solved. Go to step 4. Remove any obstructions from the laser beam path. Phaser 4400 Laser Printer Service Manual 3-59 - Xerox 4400DT | Service Manual - Page 157
Vertical Deletions Troubleshooting Procedure (cont'd.) problem is solved: I Transfer Roller Assembly (RRP 7.1 on page 6-79) I Laser Assembly (RRP 7.4 on page 6-82) I Fuser Assembly (RRP 6.2 on page 6-66) I Engine Logic Board (RRP 9.3 on page 6-89) 3-60 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 158
I Check that the paper supply is dry and fresh. I Inspect the printer paper path for items such as staples, paper clips and paper scraps. Guide in the printer) are clean. I Check that rollers and other components in the paper path are clean and unobstructed. Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 159
deletions? 7 Inspect the toner image on the drum immediately after Go to step 8. Go to the transfer area (Transfer Roller). High-Voltage Was the toner image on the drum transferred to the paper? Power Supply (HVPS) Assembly on page 3-31. 3-62 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 160
direction (in the direction of paper travel). Initial Actions I Check that the paper supply is dry and fresh. I Inspect the printer paper path for items such as staples, paper clips and paper scraps. I Check installation of the Print Cartridge. Phaser 4400 Laser Printer Service Manual 3-63 - Xerox 4400DT | Service Manual - Page 161
Remove any obstructions from the laser beam path. 5 Inspect the Transfer Roller Assembly for contamination Go to step 6 Replace the and wear. Transfer Is the Transfer Roller free of contamination and wear? Roller Assembly (RRP 7.1 on page 6-79). 3-64 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 162
of the Print Cartridge. I Check that the Print Cartridge ground contacts (on the right side of the Print Cartridge and in the Print Cartridge Side Guide in the printer) are clean. Phaser 4400 Laser Printer Service Manual 3-65 - Xerox 4400DT | Service Manual - Page 163
? Problem solved Guide (RRP 7.5 on page 6-83). 6 Inspect the Transfer Roller Assembly for contamination Go to step 7. Replace the and wear. Transfer Is the Transfer Roller free of contamination and wear? Roller Assembly (RRP 7.1 on page 6-79). 3-66 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 164
streaks? 8 Inspect the toner image on the Drum immediately after Go fuser jam access cover. 4. Rotate the fuser idler gear manually and inspect the Pressure Roller. Are the Heat Roller and the Pressure Roller free of surface defects and contamination? Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 165
the spots gone? Problem solved. Go to step 2. 2 Inspect the Transfer Roller Assembly for contamination Go to step 3. Replace the and wear. Transfer Is the Transfer Roller free of contamination and wear? Roller Assembly (RRP 7.1 on page 6-79). 3-68 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 166
I Laser Assembly (RRP 7.4 on page 6-82) I Engine Logic Board (RRP 9.2 on page 6-88) Unfused Image The printed image is not fully fused to the paper. The image rubs off easily. Initial Actions I Check to ensure that the paper is within specification. Phaser 4400 Laser Printer Service Manual 3-69 - Xerox 4400DT | Service Manual - Page 167
Roller page 6-66). contacting each other uniformly? 7 Replace the following, in order, until the defective component is found: I Fuser Assembly (RRP 6.2 on page 6-66) I Engine Logic Board (RRP 9.3 on page 6-89) I LVPS PWB (RRP 9.5 on page 6-91). 3-70 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 168
Go to step 5. Remove the exit tray for contamination or obstructions. obstructions or Is the paper path free of obstructions? contamination from the paper path. Phaser 4400 Laser Printer Service Manual 3-71 - Xerox 4400DT | Service Manual - Page 169
following, in order, until the defective component is found: I RRP 6.2 Fuser Assembly on page 6-66 I RRP 6.1 Transport Chute Assembly on page 6-65 Laser Assembly (RRP 7.4 on page 6-82) I HVPS PWB (RRP 9.6 on page 6-92) Problem solved. Go to step 2. 3-72 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 170
3. Problem solved. 3 Inspect the toner image on the drum immediately after Go to step 4. Replace the the transfer area (Transfer Roller). Transfer Was the toner image on the drum transferred to the paper? Roller Assembly (RRP 7.1 on page 6-79). Phaser 4400 Laser Printer Service Manual 3-73 - Xerox 4400DT | Service Manual - Page 171
in the Print Cartridge Side Guide in the printer) are clean. Troubleshooting Repeating Defects Step Actions and Problem solved. Install a new Print Cartridge. Go to step 3 Replace the Transfer Roller Assembly (RRP 7.1 on page 6-79). Go to step 4. 3-74 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 172
paper with fresh, dry paper. 2. Print a test print. Do the residual images still appear? Go to step 2. Problem solved. 2 Install a new Print Cartridge. Print a test print. Do the residual images still appear? Go to step 3. Problem solved. Phaser 4400 Laser Printer Service Manual 3-75 - Xerox 4400DT | Service Manual - Page 173
page 6-83) Background There is toner contamination on all or part of the page. The contamination appears as a very light gray dusting. s4400_309 Initial Actions I Inspect the printer paper path for items such as staples, paper clips and paper scraps. 3-76 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 174
(RRP 9.6 on page 6-92) I Fuser Assembly (RRP 6.2 on page 6-66) I Transport Chute Assembly (RRP 6.1 on page 6-65) I Laser Assembly (RRP 7.4 on page 6-82) I Print Cartridge Side Guide (RRP 7.5 on page 6-83) I Engine Logic Board (RRP 9.3 on page 6-89). Phaser 4400 Laser Printer Service Manual 3-77 - Xerox 4400DT | Service Manual - Page 175
machine is reasonably level. I Check to make sure the Laser path is clean and unobstructed. I Remove the Print Cartridge and check the Left and Right Guides for wear, contamination, obstructions, etc. I Clean the Laser window. Uneven Density Troubleshooting Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 176
Troubleshooting Procedure (cont'd.) Step Actions and Questions 4 Check the Fuser Assembly for worn parts and for contamination on the Fuser Roller or Pressure Roller. The Fuser Assembly is in good condition. 5 Panic stop the printer installed. Phaser 4400 Laser Printer Service Manual 3-79 - Xerox 4400DT | Service Manual - Page 177
Troubleshooting Procedure Step Actions and Yes No Questions 1 Run 5 Test Prints, single I Check the Fuser Assembly. Go to step 2. sided, from each paper Check for worn parts or rolls. tray. If the printer Check the MPT Guide. Check for obstructions Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 178
Skewed Image Troubleshooting Procedure (cont'd.) Step Actions and Questions 5 The skewed image correctly. I Check that the Paper Tray guides are set correctly. I Check that rollers and other components in the paper path are clean and unobstructed. Phaser 4400 Laser Printer Service Manual 3-81 - Xerox 4400DT | Service Manual - Page 179
5. Go to step 2. Go to step 3. Perform the registration procedure (Registration on page 4-5). Go to step 6 Go to step 4. Go to step 7. Go to step 5. Problem solved. Have the customer contact Xerox Customer Support. 3-82 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 180
or debris. Skips/Smears Troubleshooting Procedure Step Actions and Fuser Assembly (page 6-66). Does the defect still occur? Yes No Go to step 2. Problem solved. Replace the Print Cartridge (PL 8.1 Drive and Xerographics on page 7-20). Problem solved. Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 181
3-84 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 182
that is accessible from the printer's Printable Pages Menu when you select Print Test Prints. The other is the Engine Test Print, which is stored in the Engine Logic Board and is accessible through the Engine Test Print menu in Service Diagnostics. Phaser 4400 Laser Printer Service Manual 4-1 - Xerox 4400DT | Service Manual - Page 183
state. To print the Test Print: 1. Select Printable Pages Menu from the Main Menu and press OK. 2. Select Print Test Prints and press OK. The printer automatically prints two images. Note: If you changed the print quantity, be sure to set it back to 1 4-2 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 184
Phaser 4400 Laser Printer Service Manual 4-3 - Xerox 4400DT | Service Manual - Page 185
Engine Test Print The Engine Test Print is stored on the Engine Logic Board and is used for checking the functionality of various print engine components and for making the registration adjustment. 4-4 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 186
On, press the Down key to change it to Off. 12.Repeat steps 2 through 8 for each input source. Check the registration for the duplexed prints. Phaser 4400 Laser Printer Service Manual 4-5 - Xerox 4400DT | Service Manual - Page 187
203°C 354 - 365°F Medium High 197 - 206°C 354 - 371°F 209°C 376°F Extra High 210 - 215°C 378 - 387°F Fuser Configuration Defaults Plain Letterhead Labels Medium Medium High Colored Paper Medium Card Stock High Envelope Special High Medium 4-6 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 188
default values. You can reset the PostScript NVRAM using the Customer Menu, the Service Diagnostics Menu, or the Front Panel Shortcut. Customer Menu Resets Resetting job defaults prior to resetting the network setup to factory default values. Phaser 4400 Laser Printer Service Manual 4-7 - Xerox 4400DT | Service Manual - Page 189
Main Menu, scroll to Support Menu and press OK. 2. Scroll to Service Tools Menu and press OK. 3. Reset NVRAM is highlighted - press OK. 4. Highlight Reset NVRAM and Reset Printer NOW and press OK to " appears, press UP + DOWN keys within 2 seconds. 4-8 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 190
Print Engine NVRAM There is no single reset for the Print Engine NVRAM. Phaser 4400 Laser Printer Service Manual 4-9 - Xerox 4400DT | Service Manual - Page 191
4-10 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 192
Fuser Assembly, Laser Assembly, and paper path. 6. Vacuum out any loose toner from the interior of the printer with a Type II toner vacuum only. 7. Remove and clean the paper trays. 8. Clean feeder rollers with a lint-free cloth lightly dampened with water. Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 193
5-2 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 194
refer to steps in the procedure. For example: if step 3 in a procedure instructs you to remove a screw, the screw in the illustration is labeled 3. Unless a 22 RRP 2.4 Motor Assembly 6-24 RRP 2.5 Paper Feeder Connector and Socket Guide 6-26 Phaser 4400 Laser Printer Service Manual 6-1 - Xerox 4400DT | Service Manual - Page 195
Paper Transportation 6-57 RRP 5.1 Paper Handler Assembly 6-57 RRP 5.2 Toner Sensor 6-59 RRP 5.3 Registration Actuator 6-60 RRP 5.4 Registration Sensor 6-73 RRP 6.8 Output Tray Full Actuator 6-76 RRP 6.9 Fuser Upper Cover Assembly/ Heat Rod 6-77 6-2 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 196
6-79 RRP 7.2 Print Cartridge Top Guide Assembly 6-80 RRP 7.3 Print Cartridge Sensor Assembly 6-81 RRP 7.4 Laser Assembly 6-82 RRP 7.5 Print Cartridge Side Guide 6-83 Main Drive 6-84 RRP Assembly 6-118 RRP 10.18 Offset Assembly Home Sensor 6-119 Phaser 4400 Laser Printer Service Manual 6-3 - Xerox 4400DT | Service Manual - Page 197
List of Procedures (cont'd.) Optional Paper Feeder 6-120 RRP 11.1 Printer Removal 6-120 RRP 11.2 550-Sheet Feeder Right Cover 6-121 RRP 11.3 550-Sheet Feeder Left Belt 6-154 RRP 12.13 Duplex Sensor 6-155 RRP 12.14 Duplex Unit Home Sensor 6-156 6-4 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 198
.14 Bottom Roller Assembly 6-170 RRP 13.15 Feed Roller Assembly 1 6-172 RRP 13.16 Feed Roller Assembly 2 6-174 RRP 13.17 Feed Belts 6-176 Phaser 4400 Laser Printer Service Manual 6-5 - Xerox 4400DT | Service Manual - Page 199
the Power Cord. 1. Loosen the two thumb screws that secure the Left Interface Cover. 2. Slide the cover to the rear and remove. Left Interface Cover 6-6 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 200
disconnect the Power Cord. 1. Remove the Left Interface Cover (RRP 1.1 Left Interface Cover on page 6-6). 2. Remove the two screws securing the Left Cover to the printer. (See figure.) 3. Remove the Left Cover. Left Cover Phaser 4400 Laser Printer Service Manual 6-7 - Xerox 4400DT | Service Manual - Page 201
Assembly. 2. Push the two locking tabs at the rear of Option Cover. 3. Lift and slide the Option Cover to the rear and remove. Option Cover 6-8 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 202
screws securing the Top Cover Assembly. 6. Disconnect the ribbon cable from J790 on the Image Processor Board. 7. Remove the Top Cover Assembly. Top Cover Assembly Phaser 4400 Laser Printer Service Manual 6-9 - Xerox 4400DT | Service Manual - Page 203
without an optional feeder, slide the right edge of the printer over the edge of the stand/table by approximately 1 inch. 7. Lower the cover to disconnect the three hooks at the top and bottom of the Right Cover. 8. Remove the Right Cover. Right Cover 6-10 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 204
the left or right and remove from the right cover. 3. Remove the K clip that secures the Front Cover Assembly to the left stud of the printer. 4. Slide the Front Cover to the right and remove. Front Cover Phaser 4400 Laser Printer Service Manual 6-11 - Xerox 4400DT | Service Manual - Page 205
three screws securing the Left Front Cover. 4. Use a small screwdriver to press on the locking tab and the remove the cover. Left Front Cover 6-12 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 206
Pivot Stopper that secures the left Rear Cover Assembly. 4. Slide the Rear Cover Assembly to the right (as viewed from the rear). Rear Cover Assembly Phaser 4400 Laser Printer Service Manual 6-13 - Xerox 4400DT | Service Manual - Page 207
Assembly (RRP 1.4 Top Cover Assembly on page 6-9). 2. Remove the four screws securing the Front Panel Assembly to the Top Cover. 2 2 Front Panel Assembly s4400_354 6-14 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 208
Assembly (RRP 1.8 Rear Cover Assembly on page 6-13). 2. Remove the screw that secures the Stopper to the printer. 3. Remove the two screws that secure the Interlock Cover to the printer. 4. Remove the Interlock Cover from the printer. Interlock Cover Phaser 4400 Laser Printer Service Manual 6-15 - Xerox 4400DT | Service Manual - Page 209
1.1 Left Interface Cover on page 6-6). 3. Remove the Left Cover (RRP 1.2 Left Cover on page 6-7). 4. Remove the six screws that secure the Left Plate to the printer and remove the plate. Left Plate 6-16 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 210
on page 6-12). 6. Remove the Left Plate (RRP 1.11 Left Plate on page 6-16). 7. Remove the four screws that secure the Plate Handle to the printer and remove the Plate Handle. Plate Handle Phaser 4400 Laser Printer Service Manual 6-17 - Xerox 4400DT | Service Manual - Page 211
Tray 1 RRP 2.1 Retard Roller Assembly See the Parts List on page 7-6. 1. Remove Tray 1. 2. Release the left and right latches of Tray 1. 3. Open the Retard Chute. 4. Lift the locking tab and remove the Retard Roller Assembly. Retard Chute 6-18 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 212
Retard Roller Assembly Phaser 4400 Laser Printer Service Manual 6-19 - Xerox 4400DT | Service Manual - Page 213
the components in the reverse order. Ensure that the tab on the clutch is positioned on the pin on the Retard Shaft. Tray 1 Latches 6-20 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 214
Retard Roller Friction Clutch Assembly Phaser 4400 Laser Printer Service Manual 6-21 - Xerox 4400DT | Service Manual - Page 215
1. 3. Open the Retard Chute. 4. Release the two Locking Tabs and lift the Retard Assembly. 5. Remove the Retard Spring from the Roller Assembly. Retard Chute 6-22 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 216
Retard Spring Replacement Reinstall the components in the reverse order. Ensure that the tab on the clutch is positioned on the pin on the Retard Shaft. Phaser 4400 Laser Printer Service Manual 6-23 - Xerox 4400DT | Service Manual - Page 217
or small screwdriver to lift the locking tabs to disconnect P/J672. 4. Press the Socket Guide slightly and disconnect P/J672. 5. Remove the three screws securing the motor to the Motor Assembly. 6. Remove the motor. Left and Right Motor Brackets 6-24 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 218
Motor Assembly Phaser 4400 Laser Printer Service Manual 6-25 - Xerox 4400DT | Service Manual - Page 219
and Socket Guide See the Guide. 5. Remove the two screws that secure the Socket Guide. 6. Remove the Socket Guide together with the Connector. 7. Remove the Spring. 8. Slide the Connector to disconnect it from the Socket Guide. Left Motor Bracket 6-26 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 220
Connector and Socket Guide Phaser 4400 Laser Printer Service Manual 6-27 - Xerox 4400DT | Service Manual - Page 221
). 11.Remove the MPT Chute Assembly (RRP 4.1 MPT Chute Assembly on page 6-44). 12.Remove the seven screws that secure the Paper Feeder to the printer. 13.Pull the Paper Feeder toward the front to remove. Paper Feeder 6-28 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 222
Turn Roller Assembly to the Paper Feeder Assembly. 15.Remove the Turn Roller Assembly together with the Extension Spring and Chute Spring. Turn Clutch Assembly Phaser 4400 Laser Printer Service Manual 6-29 - Xerox 4400DT | Service Manual - Page 223
support. Remove the actuator. Note: If removing or replacing the actuator proves too difficult with the feeder assembly installed, it will be necessary to remove the feeder assembly from the printer (RRP 3.1 Paper Feeder on page 6-28). No Paper Actuator 6-30 Phaser 4400 Laser Printer Service - Xerox 4400DT | Service Manual - Page 224
: If removing or replacing the sensor proves too difficult with the feeder assembly installed, it will be necessary to remove the feeder assembly from the printer (RRP 3.1 Paper Feeder on page 6-28). Stack Height Sensor Phaser 4400 Laser Printer Service Manual 6-31 - Xerox 4400DT | Service Manual - Page 225
: If removing or replacing the sensor proves too difficult with the feeder assembly installed, it will be necessary to remove the feeder assembly from the printer (RRP 3.1 Paper Feeder on page 6-28). Low Paper Sensor 6-32 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 226
bracket to the Paper Feeder and remove the bracket. 11.Remove the Gear 3 and Gear 2 from the shaft of the Paper Feeder. Paper Feeder Bracket Phaser 4400 Laser Printer Service Manual 6-33 - Xerox 4400DT | Service Manual - Page 227
Reinstall the components in the reverse order. Ensure that all alignment pins are properly inserted in the bracket holes before replacing the four screws. 6-34 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 228
Feeder Assembly. Caution: Don't lose Bias Spring located under the Feeder Assembly. 16.Slide the Feeder Assembly to the right and remove. Feeder Assembly Bearing Phaser 4400 Laser Printer Service Manual 6-35 - Xerox 4400DT | Service Manual - Page 229
the Front Feed Roller and slide the roller to the right off the shaft. 3. Repeat step 2 with the Rear Feed Roller. Paper Feed Rollers 6-36 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 230
Paper Actuator to clear the board. 15.Remove the three screws that secure the Feeder PWB to the Paper Feeder. 16.Remove the Feeder PWB. Phaser 4400 Laser Printer Service Manual 6-37 - Xerox 4400DT | Service Manual - Page 231
Feeder PWB 6-38 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 232
the two screws that secure the Feeder Socket in the printer. Note: It may be necessary to use a scribe or small screwdriver to lift the locking tabs to disconnect P/J671. 14.Lift locking tabs and disconnect P/J671 from the Socket. Feeder Socket Phaser 4400 Laser Printer Service Manual 6-39 - Xerox 4400DT | Service Manual - Page 233
P/J33 from the Engine Logic Board and remove cable from all cable clamps. 9. Press the locking pin, slide the housing to the rear of the printer, and remove the housing. Size Sensor Housing 6-40 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 234
. 2. Ensure that the actuators (B) are in the correction position. 3. During reassembly ensure that locking tabs slide into position. 4. Reinstall the components in the reverse order. Phaser 4400 Laser Printer Service Manual 6-41 - Xerox 4400DT | Service Manual - Page 235
screws that secure the Tray 1 Size PWB to the Size Sensor Housing 12.Lift the PWB and disconnect P/J51 and P/J331. Tray 1 Size PWB 6-42 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 236
1 Size PWB. 10.Remove the two screws that secure the Size Harness Assembly to the Sensor. 11.Remove the Size Harness Assembly. Size Harness Assembly Phaser 4400 Laser Printer Service Manual 6-43 - Xerox 4400DT | Service Manual - Page 237
4. Disconnect P/J41, P/J44, and P/J45 from the Connector PWB. 5. Open the two clamps securing the harness of the MPT Chute Assembly to the printer. 6. Remove the four screws that secure the MPT Chute Assembly. Remove the assembly. MPT Chute Assembly 6-44 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 238
assembly, slide the MPT Feed Roller Assembly to the left. 10.Lift the right end of the shaft and remove. MPT Pick Up Gear Spring Phaser 4400 Laser Printer Service Manual 6-45 - Xerox 4400DT | Service Manual - Page 239
MPT Pick Up Cam MPT Roller Assembly 6-46 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 240
the right and remove. MPT Feed Roller Replacement Note: Align the MPT Feed Roller with the Drive Pin. Reinstall the components in the reverse order. Phaser 4400 Laser Printer Service Manual 6-47 - Xerox 4400DT | Service Manual - Page 241
a small screwdriver to carefully lift the bearing locking tab and remove the Bottom Tray Assembly. 8. Remove the right Exit Bearing. Bottom Tray Assembly Chute 6-48 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 242
bottom, ensure that the sleeves on the Tray Bottom fit over the two posts on the MPT frame. (See A in the Bottom Tray Assembly illustration.) Phaser 4400 Laser Printer Service Manual 6-49 - Xerox 4400DT | Service Manual - Page 243
on page 6-48). 7. Lift the MPT No Paper Actuator from the back of the Bottom Tray and remove the actuator. MPT No Paper Actuator 6-50 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 244
the Tray Pick Up from the Bottom Tray Assembly and remove the Tray Pick Up. (RRP 4.4 Bottom Tray Assembly on page 6-48). Tray Pick Up Phaser 4400 Laser Printer Service Manual 6-51 - Xerox 4400DT | Service Manual - Page 245
bracket arms of the Retard Pad Assembly from the MPT Chute Assembly (see the insets) and remove the Retard Pad Assembly. Retard Pad Assembly 6-52 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 246
Assembly. 8. Release the five hooks that secure the MPT No Paper Sensor and remove the sensor. 9. Disconnect P/J451 from the sensor. Bottom Tray Pick Up Phaser 4400 Laser Printer Service Manual 6-53 - Xerox 4400DT | Service Manual - Page 247
MPT No Paper Sensor 6-54 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 248
gear and spring. 6. Remove the screw that secures the MPT Pick Up Solenoid to the MPT Chute Assembly. 7. Remove the solenoid. MPT Pick Up Solenoid Phaser 4400 Laser Printer Service Manual 6-55 - Xerox 4400DT | Service Manual - Page 249
the Envelope Connector Assembly and the Mounting to the left and remove. 7. Remove the Envelope Connector Assembly from the MPT Assembly. Envelope Connector Assembly 6-56 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 250
from the Printer. 6. Remove Gear 14. 7. Disconnect P/J43 and P/J42 from the Connector PWB. 8. Remove the five screws that secure the Paper Handler Assembly. 9. Lift the right end slightly and remove the Paper Handler. Shaft 14 and the Paper Handler Assembly Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 251
Paper Handler Assembly Paper Handler Assembly Removal 6-58 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 252
Cord. 1. Remove Tray 1. 2. Remove the Front Cover Assembly (RRP 1.6 Front Cover Assembly on page 6-11). 3. Release the left locking tab and remove the Toner Sensor as shown. 4. Disconnect P/J421 from the sensor (shown in the inset). Toner Sensor Kit Phaser 4400 Laser Printer Service Manual 6-59 - Xerox 4400DT | Service Manual - Page 253
of the Registration Sensor Spring. 6. Move the Registration Actuator to the left until the right end is free. 7. Remove the Registration Actuator. Registration Actuator 6-60 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 254
Registration Sensor (see the inset in the illustration). 8. Remove the sensor out the back of the Paper Handler. 9. Disconnect P/J432 from the sensor. Registration Sensor Phaser 4400 Laser Printer Service Manual 6-61 - Xerox 4400DT | Service Manual - Page 255
6-6). 3. Remove the Front Cover Assembly (RRP 1.6 Front Cover Assembly on page 6-11). 4. Remove the Left Front Cover (RRP 1.7 Left Front Cover on page 6-12). 6-62 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 256
left and right bearings from the Rubber Registration Roller. 15.Lift the right end of the Rubber Registration Roller and remove the roller. Registration Roller Phaser 4400 Laser Printer Service Manual 6-63 - Xerox 4400DT | Service Manual - Page 257
Registration Springs Rubber Registration Roller 6-64 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 258
Exit Assembly and Fuser RRP 6.1 Transport Transfer Roller Assembly on page 6-79). 7. Remove the screw that secures the DTS Wire (white) to the Transport Chute Assembly. 8. Remove the screw that printer. 10.Remove the assembly. Transport Chute Assembly Phaser 4400 Laser Printer Service Manual 6-65 - Xerox 4400DT | Service Manual - Page 259
Cord. The Fuser may be hot. 1. Open the Rear Cover Assembly. 2. Remove Duplex Unit (if installed) (RRP 12.1 Duplex Unit on page 6-141). 3. Remove the two thumb screws that secure the Fuser Assembly to the printer and remove the Fuser. Fuser Assembly 6-66 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 260
secures the HVPS Housing to the printer. 21.Remove the HVPS. 22.Pull the Fuser Harness Assembly from the left side of the printer. 23.Remove the two screws that secure the Fuser Harness Assembly to the printer. 24.Remove the Fuser Harness Assembly. Phaser 4400 Laser Printer Service Manual 6-67 - Xerox 4400DT | Service Manual - Page 261
Fuser Harness Assembly 6-68 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 262
page 6-15). 10.Disconnect P/J31 and P/J32 from the Engine Logic Board. 11.Remove the four screws that secure the Exit Chute Assembly to the printer. 12.Remove the Exit Chute Assembly. Exit Chute Harness Assembly Phaser 4400 Laser Printer Service Manual 6-69 - Xerox 4400DT | Service Manual - Page 263
Exit Chute Assembly 6-70 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 264
page 6-69). 11.Remove the two screws that secure the Exit Motor Assembly to the Exit Chute Assembly. 12.Remove the motor. Exit Motor Assembly Phaser 4400 Laser Printer Service Manual 6-71 - Xerox 4400DT | Service Manual - Page 265
the five hooks securing the Output Tray Full Sensor to the Exit Chute Assembly. 6. Remove the sensor. 7. Disconnect P/J311 from the sensor. Exit Sensor 6-72 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 266
that secures the Exit Bearings to the Exit Chute Assembly. 16.Remove the Roller Assembly together with the Exit Bearing from the Exit Chute Assembly. Phaser 4400 Laser Printer Service Manual 6-73 - Xerox 4400DT | Service Manual - Page 267
Replacement Reinstall the components in the reverse order. Exit 17 and Exit 32 Gears 6-74 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 268
Mid 1 Roller Assembly Mid 2 Roller Assembly Phaser 4400 Laser Printer Service Manual 6-75 - Xerox 4400DT | Service Manual - Page 269
of the Static Eliminator Assembly and remove. 7. Lift the actuator out of the Exit Chute Assembly. Static Eliminator Assembly and Output Tray Full Actuator 6-76 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 270
Carefully remove the Heat Rod by lifting the right end sliding it out to the right side of the Heat Roller. 8. Return the Fuser Assembly to its right side up position. 9. Remove the four screws and the Fuser Upper Cover. Fuser Assembly Fuser Heat Rod Phaser 4400 Laser Printer Service Manual 6-77 - Xerox 4400DT | Service Manual - Page 271
Heat Rod Fuser Upper Cover 6-78 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 272
surface of the Transfer Roller with your hands. Oil from your hands can cause image-quality problems. After removing the Transfer Roller, store the Roller on clean paper and cover with another Assembly, remove the assembly. Transfer Roller Assembly Phaser 4400 Laser Printer Service Manual 6-79 - Xerox 4400DT | Service Manual - Page 273
6-89). 8. Remove the two screws that secure the Print Cartridge Top Guide Assembly to the printer. 9. Remove the Print Cartridge Top Guide Assembly together with the Print Cartridge Sensor Assembly from the printer. Print Cartridge Top Guide Assembly 6-80 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 274
Cartridge Sensor Assembly from the three clamps securing it to the Print Cartridge Top Guide Assembly. 7. With a small screwdriver pry the left and right latches free of the pivot pins and remove the sensor assembly. Print Cartridge Sensor Assembly Phaser 4400 Laser Printer Service Manual 6-81 - Xerox 4400DT | Service Manual - Page 275
securing the Laser Assembly to the printer. 3. Raising the Laser Assembly slightly disconnect P/J213 and P/J223 from the rear and two connectors from the bottom of the Laser Assembly. 4. Remove the Laser Assembly from the printer. Laser Assembly 6-82 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 276
RRP 7.5 Print Cartridge Side Guide See the Parts List on page 7-20. Warning: Switch off the power and disconnect the Power Cord. 1. the spring clip on the right side of the frame. 10.Remove the Print Cartridge Side Guide. Print Cartridge Side Guide Phaser 4400 Laser Printer Service Manual 6-83 - Xerox 4400DT | Service Manual - Page 277
P/J29 from the Engine Logic Board. 5. Release Motor Harness from all cable clamps. 6. Remove the four screws that secure the Main Motor Assembly to the printer and remove the assembly. Main Motor Assembly 6-84 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 278
6-17). 7. Remove the Fuser Assembly (RRP 6.2 Fuser Assembly on page 6-66 Guide Assembly (RRP 7.2 Print Cartridge Top Guide printer. (Screws are marked with a "D"). 17.Pull bottom of assembly out and lower the assembly to release the locking tab and remove. Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 279
Drive Gear Assembly 6-86 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 280
6-16). 8. Disconnect P/J283 connected to the Fan Assembly from the LVPS PWB. 9. Release the harness of the Fan Assembly from the two clamps on the printer. 10.Remove the two screws securing the assembly to the printer. 11.Remove the Fan. Fan Assembly Phaser 4400 Laser Printer Service Manual 6-87 - Xerox 4400DT | Service Manual - Page 281
9.3 Engine Logic Board on page 6-89). 7. Remove the Image Processor Board from the printer. 8. Remove the socketed NVRAM IC (U340) and Configuration Upgrade Chip (U400) for installation on the replacement Image Processor board. Image Processor Board 6-88 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 282
Left Plate on page 6-16). 4. Disconnect all connectors from the Engine Logic Board. 5. Remove the four screws that secure the Engine Logic Board to the printer. Remove the Engine Logic Board. Engine Logic Board Phaser 4400 Laser Printer Service Manual 6-89 - Xerox 4400DT | Service Manual - Page 283
page 6-16). 4. Disconnect PN288 from the 5 VDC PWB and PN1 from the LVPS PWB. 5. Remove the two screws that secure the 5 VDC PWB to the printer. 6. Remove the 5 VDC PWB. 5 VDC PWB 6-90 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 284
). 8. Disconnect the Main Switch. 9. Disconnect P/J11, PN1, P/J282, P/J283, P/J284, P/J285 and P/J281. 10.Remove the four screws that secure the LVPS PWB to the printer. 11.Remove the LVPS PWB. LVPS PWB Phaser 4400 Laser Printer Service Manual 6-91 - Xerox 4400DT | Service Manual - Page 285
. 11.Remove the HVPS Assembly Housing from the printer. 12.Carefully disconnect the DTS (white) and TR (red) wires from the HVPS. 13.Release the two hooks that secure the HVPS PWB to the Housing, then remove the HVPS PWB. High-Voltage Power Supply 6-92 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 286
HVPS PWB Phaser 4400 Laser Printer Service Manual 6-93 - Xerox 4400DT | Service Manual - Page 287
page 6-12). 5. Disconnect P/J41, P/J42, P/J43, P/J44, P/J45 and P/J231 from the Connector PWB. 6. Remove the three screws that secure the Connector PWB to the printer. 7. Remove the Connector PWB. Connector PWB 6-94 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 288
on page 6-17). 8. Press the locking tabs and push the rear of the Main Switch so that it comes out of the front of the printer. 9. Disconnect the Harness from the Main Switch, and remove the Main Switch from the printer. Main Switch Phaser 4400 Laser Printer Service Manual 6-95 - Xerox 4400DT | Service Manual - Page 289
9.5 LVPS PWB on page 6-91). 8. Release the switch harness from all cable clamps. 9. Remove the screw that secures the Front Interlock Switch Assembly to the printer. 10.Remove the Front Interlock Switch Assembly. Front Interlock Switch Assembly 6-96 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 290
from Engine Logic Board. 12.Release the Harness from all cable clamps. 13.Remove the screw that secures the Rear Interlock Switch Assembly to the printer. 14.Remove the Rear Interlock Switch Assembly. Rear Interlock Switch Assembly Phaser 4400 Laser Printer Service Manual 6-97 - Xerox 4400DT | Service Manual - Page 291
Stacker Harness from all cable clamps. 11.Remove the two screws that secure the Stacker Harness Assembly. 12.Remove the Stacker Harness Assembly from the printer. Stacker Harness Assembly 6-98 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 292
). 13.Remove the Fuser Assembly (RRP 6.2 Fuser Assembly on page 6-66). 14.Remove the Print Cartridge Top Guide Assembly (RRP 7.2 Print Cartridge Top Guide Assembly on page Duplex Harness Assembly to the printer. 19.Remove the Duplex Harness Assembly. Phaser 4400 Laser Printer Service Manual 6-99 - Xerox 4400DT | Service Manual - Page 293
Duplex Harness Assembly 6-100 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 294
power and disconnect the Power Cord. 1. Open the printer Rear Cover. 2. Press the two locking tabs at the rear of the Stacker. 3. Lift the rear of the Stacker approximately 1 inch (25 mm). 4. Slide the Stacker toward the rear and remove it. Stacker Phaser 4400 Laser Printer Service Manual 6-101 - Xerox 4400DT | Service Manual - Page 295
until it is free of the Stacker. 5. Push the left hinge pin in until it is free of the Stacker. 6. Remove the Exit Tray. 6-102 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 296
Exit Tray Paper Weight Exit Tray Phaser 4400 Laser Printer Service Manual 6-103 - Xerox 4400DT | Service Manual - Page 297
). 4. Release and remove the two Rear Cover Springs. 5. Remove the six screws that secure the Rear Cover. 6. Remove the Rear Cover. Rear Cover Assembly 6-104 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 298
Cover. 3 4 s4400_109 Lower Cover Replacement Hold the Stack Height Sensor Actuator out as you reinstall the lower cover. Reinstall the components in the reverse order. Phaser 4400 Laser Printer Service Manual 6-105 - Xerox 4400DT | Service Manual - Page 299
6-105). 3. Remove the five screws that secure the Inner Exit Chute Assembly. 4. Hold open the Rear Cover. 5. Remove the assembly. Inner Exit Chute Assembly 6-106 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 300
). 4. Remove the screw that secures the PWB to the Inner Exit Chute Assembly. 5. Disconnect P/J209, P/J224, P/J210, and P/J229. 6. Remove the Stacker PWB. Stacker PWB Phaser 4400 Laser Printer Service Manual 6-107 - Xerox 4400DT | Service Manual - Page 301
. The ground wire on top and the earth plate at the bottom should be on the outside. Reinstall the components in the reverse order. 6-108 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 302
Chute Assembly on page 6-106). 4. Remove the three screws that secure the Static Eliminator to the Inner Exit Chute. 5. Remove the Static Eliminator. Static Eliminator Phaser 4400 Laser Printer Service Manual 6-109 - Xerox 4400DT | Service Manual - Page 303
P/J228 from the Direction Solenoid. 5. Remove the two screws that secure the solenoid to the Inner Exit Chute Assembly. 6. Remove the solenoid. Direction Solenoid 6-110 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 304
.6 Inner Exit Chute Assembly on page 6-106). 4. Release the locking tabs and remove the Exit Sensor Assembly. 5. Disconnect P/J227 from the sensor. Exit Sensor Assembly Phaser 4400 Laser Printer Service Manual 6-111 - Xerox 4400DT | Service Manual - Page 305
Static Eliminator (RRP 10.9 Static Eliminator on page 6-109). 5. Remove the Stacker Full Sensor Actuator from the two retaining clips. Stacker Full Sensor Actuator 6-112 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 306
PWB on page 6-107). 5. Disconnect P/J225 from the Stacker Full Sensor. 6. Release the locking tabs that secure the sensor. 7. Remove the sensor. Stacker Full Sensor Phaser 4400 Laser Printer Service Manual 6-113 - Xerox 4400DT | Service Manual - Page 307
and remove the Offset Lever from the Offset Roller Assembly. 10.Remove the Exit Shaft. 11.Remove the Offset Roller Assembly. Offset Roller Assembly 6-114 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 308
end of the shaft. 9. Slide the shaft to the right and remove the left end of the Mid Roller Assembly. Remove the assembly. Ground Plate Phaser 4400 Laser Printer Service Manual 6-115 - Xerox 4400DT | Service Manual - Page 309
Locking Tab, Exit Gear, and Bearings Mid Roller Assembly 6-116 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 310
P/J229 from the Stacker PWB. 7. Disconnect P/J226 from the Offset Home Sensor. 8. Remove the harness from all harness clamps. 9. Remove the Offset Assembly. Offset Assembly Phaser 4400 Laser Printer Service Manual 6-117 - Xerox 4400DT | Service Manual - Page 311
10.16 Offset Assembly on page 6-117). 5. Remove the two screws that secure the Offset Motor. 6. Remove the Offset Motor Assembly. Offset Motor Assembly 6-118 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 312
motor linkage until the flag is clear of the sensor. 7. Release the locking tabs and remove the Offset Assembly Home Sensor. Offset Assembly Home Sensor Phaser 4400 Laser Printer Service Manual 6-119 - Xerox 4400DT | Service Manual - Page 313
yourself. The printer is heavy; lifting it requires two people. 1. Remove Tray 1 from the Feeder. 2. Remove the three screws that secure the printer to the 550-Sheet Feeder. 3. Lift the printer clear of the 550-Sheet Feeder. Optional Feeder Assembly 6-120 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 314
the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the four screws that secure the right cover. 4. Lift slightly to remove the cover. Right Cover Phaser 4400 Laser Printer Service Manual 6-121 - Xerox 4400DT | Service Manual - Page 315
Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the four screws that secure the Left Cover. 4. Pull the top of the cover out and down to remove the cover. Left Cover 6-122 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 316
Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the five screws that secure the 550-Sheet Feeder Gear Bracket Assembly to the 550-Sheet Feeder. 4. Remove the Gear Bracket Assembly. Gear Bracket Assembly Phaser 4400 Laser Printer Service Manual 6-123 - Xerox 4400DT | Service Manual - Page 317
7-26. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the the Top Plate from the Feeder. Top Plate 6-124 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 318
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the Feeder Drive Assembly. Feeder Drive Assembly Phaser 4400 Laser Printer Service Manual 6-125 - Xerox 4400DT | Service Manual - Page 319
the illustration is from the rear of the printer. 1. Remove the Tray from the Feeder. 2. Rotate the No Paper Actuator up until the left end of the actuator can be removed from the support. 3. Remove the actuator. 550-Sheet Feeder No Paper Actuator 6-126 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 320
. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the Turn Roller Assembly. Turn Roller Assembly Phaser 4400 Laser Printer Service Manual 6-127 - Xerox 4400DT | Service Manual - Page 321
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove secure the Feeder PWB and remove the PWB. Feeder PWB 6-128 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 322
28. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the Feed Clutch. 12.Remove the Feed Clutch. Bracket Phaser 4400 Laser Printer Service Manual 6-129 - Xerox 4400DT | Service Manual - Page 323
the Front Feed Roller and slide the roller to the right off the shaft. 3. Repeat step 2 with the Rear Feed Roller. Paper Feed Rollers 6-130 2 3 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 324
7-26. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the to the right and remove. E-Ring and Bearing Phaser 4400 Laser Printer Service Manual 6-131 - Xerox 4400DT | Service Manual - Page 325
.7 No Paper Actuator on page 6-126). 3. Release the five hooks and remove the Sensor. 4. Disconnect P/J662 from the Stack Height Sensor. Stack Height Sensor 6-132 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 326
Cord. 1. Remove the Tray from the Feeder. 2. Release the five hooks and remove the Low Paper Sensor. 3. Disconnect P/J661 from the sensor. Low Paper Sensor Phaser 4400 Laser Printer Service Manual 6-133 - Xerox 4400DT | Service Manual - Page 327
two screws that secure the Socket to the Feeder in the printer. 3. It may be necessary to use a scribe or small screwdriver to lift the locking tabs to disconnect P/J71. 4. Disconnect P/J71 from the Feeder Socket and remove the socket. Feeder Socket 6-134 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 328
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove Assembly. Harness Assembly Disconnecting Locking Tab Phaser 4400 Laser Printer Service Manual 6-135 - Xerox 4400DT | Service Manual - Page 329
. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the to the 550-Sheet Feeder. 7. Remove the assembly. 6-136 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 330
4 Size Sensor Housing Assembly Phaser 4400 Laser Printer Service Manual 6-137 - Xerox 4400DT | Service Manual - Page 331
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove any lower feeders if installed. 3. reassembly ensure that locking tabs slide into position. 6-138 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 332
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove Assembly. 9. Remove Tray Size PWB. Tray Size PWB Phaser 4400 Laser Printer Service Manual 6-139 - Xerox 4400DT | Service Manual - Page 333
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the printer from the 550-Sheet Feeder (RRP 11.1 Printer Removal on page 6-120). 2. Remove the Tray from the Feeder. 3. Remove the Size Harness Assembly. Size Harness Assembly 6-140 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 334
Unit RRP 12.1 Duplex Unit See the Parts List on page 7-34. Warning: Switch off the power and disconnect the Power Cord. 1. Open the Printer Rear Cover. 2. Push the left and right latches in, then pull the Duplex Unit out and up to remove. Duplex Unit Phaser 4400 Laser Printer Service Manual 6-141 - Xerox 4400DT | Service Manual - Page 335
12.1 Duplex Unit on page 6-141). 2. Remove the two screws that secure the Turn Chute Assembly. 3. Remove the Turn Chute Assembly. Turn Chute Assembly 6-142 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 336
Unit on page 6-141). 2. Turn the Duplex Unit upside down. 3. Release the three locking tabs that secure the cover. 4. Remove the Duplex Cover. Duplex Cover Phaser 4400 Laser Printer Service Manual 6-143 - Xerox 4400DT | Service Manual - Page 337
release the locking tab and remove the PWB to access the connectors. 4. Disconnect P/J392, P/J37, P/J38 and P/J39. 5. Remove the Duplex PWB. Duplex PWB 6-144 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 338
. 1. Remove the Duplex Unit (RRP 12.1 Duplex Unit on page 6-141). 2. Remove the two screws that secure the cover. 3. Remove the Drive Cover. Drive Cover Phaser 4400 Laser Printer Service Manual 6-145 - Xerox 4400DT | Service Manual - Page 339
cable clamps and pull connector through the hole in the frame. 6. Remove the two screws that secure the Connector Chute Assembly. Connector Chute Assembly 6-146 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 340
. 7. Lift the right end to remove it from the right mounting. 8. Move the Upper Chute Assembly to the right and remove the assembly. Locking Tabs Phaser 4400 Laser Printer Service Manual 6-147 - Xerox 4400DT | Service Manual - Page 341
Upper Chute Assembly 6-148 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 342
the Duplex PWB. 5. Remove the harness from all cable clamps. 6. Remove the two screws that secure the Motor Assembly. 7. Remove the Motor Assembly. Motor Assembly Phaser 4400 Laser Printer Service Manual 6-149 - Xerox 4400DT | Service Manual - Page 343
Assembly forward, then to the left until the right end is free. 11.Remove the Rear Roller Assembly. Locking Tab and Rear Retainer Flange 6-150 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 344
. 12.Lift the Middle Roller Assembly then move the roller to the left until the right end is free. 13.Remove the Middle Roller Assembly. Phaser 4400 Laser Printer Service Manual 6-151 - Xerox 4400DT | Service Manual - Page 345
Locking Tab and Belt Retainer Flange Middle Roller Assembly 6-152 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 346
Assembly and move it to the left until the right end is free. 8. Remove the Front Roller Assembly. Locking Tab and Front Belt Retainer Flange Phaser 4400 Laser Printer Service Manual 6-153 - Xerox 4400DT | Service Manual - Page 347
.5 Drive Cover on page 6-145). 3. Release the locking tab and remove the belt retainer flange. 4. Remove the Synchronous Belt from the pulleys. Synchronous Belt 6-154 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 348
Cover on page 6-143). 3. Disconnect P/J37 from the Duplex PWB. 4. Release the four locking tabs that secure the Duplex Sensor. 5. Remove the sensor. Duplex Sensor Phaser 4400 Laser Printer Service Manual 6-155 - Xerox 4400DT | Service Manual - Page 349
locking tabs that secure the Duplex Unit Home Sensor. 3. Disconnect P/J361 from the Duplex Unit Home Sensor. 4. Remove the sensor. Duplex Unit Home Sensor 6-156 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 350
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Turn the Feeder upside down. 3. Remove the two screws that secure the front of the Bottom harness connector from the cover. Bottom Cover Phaser 4400 Laser Printer Service Manual 6-157 - Xerox 4400DT | Service Manual - Page 351
7-30. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the four screws that remove it from the Top Chute. Top Chute 6-158 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 352
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the that secures the Feeder PWB to the frame. Envelope Feeder PWB Phaser 4400 Laser Printer Service Manual 6-159 - Xerox 4400DT | Service Manual - Page 353
from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute (RRP 13.2 Top Chute on page 6-158). 4. Carefully pry up on the two hinge pins and remove the Retard Roller Assembly. Retard Roller Assembly 6-160 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 354
page 7-30. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute ( with the alignment pin in the mounting. Phaser 4400 Laser Printer Service Manual 6-161 - Xerox 4400DT | Service Manual - Page 355
Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute (RRP 13.2 Top Chute on page 6-158). 4. Release the four locking tabs and remove the Exit Sensor Assembly. Exit Sensor Assembly 6-162 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 356
page 7-30. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Deflect the center of the Weight Arm until the end of the arm is free of the hinge pin, and remove the Weight Arm. . Weight Arm Phaser 4400 Laser Printer Service Manual 6-163 - Xerox 4400DT | Service Manual - Page 357
Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Pull the Tray Extension out at a 45° angle and remove it. Tray Extension 6-164 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 358
the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Carefully pry up on the hinge pins to remove the actuator from the mounting. 4. Rotate the No Paper Actuator up to remove. No Paper Actuator Phaser 4400 Laser Printer Service Manual 6-165 - Xerox 4400DT | Service Manual - Page 359
.9 No Paper Actuator on page 6-165). 4. Release the locking tabs that secure the No Paper Sensor. 5. Disconnect P/J415 from the sensor. No Paper Sensor 6-166 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 360
7-32. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute (RRP with the notch on the feed clutch housing. Phaser 4400 Laser Printer Service Manual 6-167 - Xerox 4400DT | Service Manual - Page 361
. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute ( the Feed Clutch. Torque Clutch Feed Clutch 6-168 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 362
and Bearing from Transport Roller Assembly. 7. Move the right bearing and Transport Roller Shaft to the left until it is free of the right support. 8. Lift and remove the Transport Roller Assembly. Torque Clutch and Bearing Transport Roller Assembly Phaser 4400 Laser Printer Service Manual 6-169 - Xerox 4400DT | Service Manual - Page 363
7-32. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute (RRP and remove the assembly. Torque Clutch 6-170 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 364
Clutch and Bearing Bottom Roller Assembly Phaser 4400 Laser Printer Service Manual 6-171 - Xerox 4400DT | Service Manual - Page 365
7-32. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute ( assembly. Torque Clutch, Gear, and Bearing 6-172 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 366
Feed Roller Shaft Feed Roller Assembly 1 Phaser 4400 Laser Printer Service Manual 6-173 - Xerox 4400DT | Service Manual - Page 367
7-32. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute from the assembly. Torque Clutch and Bearing 6-174 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 368
Feed Roller Shaft Feed Roller Assembly 2 Phaser 4400 Laser Printer Service Manual 6-175 - Xerox 4400DT | Service Manual - Page 369
7-32. Warning: Switch off the power and disconnect the Power Cord. 1. Remove the Envelope Feeder from the printer. 2. Remove the Bottom Cover (RRP 13.1 Bottom Cover on page 6-157). 3. Remove the Top Chute (RRP the frame. Remove the belts. Pinch Roller 6-176 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 370
Feed Belts Phaser 4400 Laser Printer Service Manual 6-177 - Xerox 4400DT | Service Manual - Page 371
6-178 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 372
10 PL 4.1 MPT Chute 7-12 PL 5.1 Paper Handler Assembly . . . . . 7-14 PL 6.1 Chute Transport and Fuser. . . . 7-16 PL 7.1 Exit 7-18 PL 8.1 Drive and Xerographics 7-20 PL 9.1 Frame and Size Sensor 7-22 Plug/Jack P/O - Part of W/ - With W/O - Without Phaser 4400 Laser Printer Service Manual 7-1 - Xerox 4400DT | Service Manual - Page 373
- - - - - Spring joint 23 - - - - - Front cover spring 24 - - - - - Env gear cover 25 - - - - - Exit 2 grounding spring 26 - - - - - Clip KL 354W24254 KL Clip S 600K79660 Hardware Kit (Includes Screw) 7-2 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 374
PL 1.1 Covers (1 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-3 - Xerox 4400DT | Service Manual - Page 375
8 54K14992 Face Up Chute Assembly 9 - - - - - Right Pivot Stopper 10 3E46120 Stopper 11 32E12671 Duplex Guide Rail-Left 12 32E12681 Duplex Guide Rail-Right 13 802K10013 Rear Cover Assembly (with 1-9) S 600K79660 Hardware Kit (Includes Screw) 7-4 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 376
PL 1.2 Covers (2 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-5 - Xerox 4400DT | Service Manual - Page 377
9 - - - - - Base Extension 10 - - - - - Left Side Guide Assembly 11 - - - - - Right Side Guide Assembly 12 - - - - - Link 13 - - - - - Tray 1 - - - - - Tray 1 Actuator 18 - - - - - Actuator Cover S 600K79660 Hardware Kit (Includes Screw) 7-6 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 378
PL 2.1 Tray 1 (1 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-7 - Xerox 4400DT | Service Manual - Page 379
- - - - - Motor Spring 20 - - - - - Right Holder 21 - - - - - Left Holder 22 127K24682 Motor Assembly 23 - - - - - Motor Holder Assembly 24 114E11680 Connector 25 - - - - - Spring 26 - - - - - Socket Guide S Hardware Kit (Includes Screw) 7-8 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 380
PL 2.2 Tray 1 (2 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-9 - Xerox 4400DT | Service Manual - Page 381
Kit (with 1-42) 22 - - - - - Nudger Support 46 Assembly (P/O item 19) 600K79550 Feed Roller Kit (item 26quantity 3) 23 130E81970 Stack Height Sensor (P/O S item 19) 600K79660 Hardware Kit (includes screw) 24 - - - - - Gear Clutch (P/O item 19) 7-10 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 382
PL 3.1 Paper Feeder - Exploded View Phaser 4400 Laser Printer Service Manual 7-11 - Xerox 4400DT | Service Manual - Page 383
- - Core 5 22K50815 MPT Roller Assembly 6 - - - - - MPT (Left) Cam Pick-up 7 - - - - - Guide Roller 8 - - - - - Bearing 9 - - - - - Tray Bottom 10 120E17121 MPT No Paper Actuator 11 - - - S 600K79660 Hardware Kit (Includes Screw) 7-12 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 384
PL 4.1 MPT Chute - Exploded View Phaser 4400 Laser Printer Service Manual 7-13 - Xerox 4400DT | Service Manual - Page 385
- Description Toner Sensor Toner Sensor Harness Assembly (J42-J421) 3 - - - - - TNS Cushion 4 - - - - - Toner Sensor Holder 5 - - - - - Toner Sensor Spring 6 600K79381 Toner Sensor Kit (with 7-38) S 600K79660 Hardware Kit (Includes Screw) 7-14 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 386
PL 5.1 Paper Handler Assembly - Exploded View Phaser 4400 Laser Printer Service Manual 7-15 - Xerox 4400DT | Service Manual - Page 387
Heat Rod (230 V) - - - - - Thumb Screw 108R00497 Maintenance Kit (120 V) (with Fuser, Transfer Roller, 9 Feed Rollers) 108R00498 Maintenance Kit (230 V) (with Fuser, Transfer Roller, 9 Feed Rollers) 600K79660 Hardware Kit (Includes Screw) 7-16 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 388
PL 6.1 Chute Transport and Fuser - Exploded View Phaser 4400 Laser Printer Service Manual 7-17 - Xerox 4400DT | Service Manual - Page 389
- - - - - Exit Ground Spring 25 600K79540 Bearing Kit (quantity 6 of item 6) 26 54K15893 Exit Chute Assembly (with 1-17, 19-24) S 600K79660 Hardware Kit (Includes Screw) 7-18 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 390
PL 7.1 Exit - Exploded View Phaser 4400 Laser Printer Service Manual 7-19 - Xerox 4400DT | Service Manual - Page 391
14 - - - - - Guide Spring A 15 - - - - - Guide Spring B 16 - - - - - Guide Arm B 17 - - - - - ROS Duct 18 - - - - - Fuser Duct 19 32K03720 Print Cartridge Sensor Kit (with 2-4) KL 354W24254 KL Clip S 600K79660 Hardware Kit (Includes Screw) 7-20 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 392
PL 8.1 Drive and Xerographics - Exploded View Phaser 4400 Laser Printer Service Manual 7-21 - Xerox 4400DT | Service Manual - Page 393
20 162K48420 Size Harness Assembly (J51-J52) 21 - - - - - Size Sensor Housing 22 802K09970 Size Sensor 1 Kit (with 13-21) S 600K79660 Hardware Kit (Includes Screw) 7-22 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 394
PL 9.1 Frame and Size Sensor - Exploded View Phaser 4400 Laser Printer Service Manual 7-23 - Xerox 4400DT | Service Manual - Page 395
160K85653 Engine Logic Board 97S02914 16 MB Flash DIMM Kit 13 105K15402 5 VDC PWB 23 98S04703 4400 Network Upgrade Kit 14 162K46972 LVPS Harness Assembly (J28-J218) 163-1485-00 Configuration Upgrade S 600K79660 Hardware Kit (Includes Screw) 7-24 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 396
PL 10.1 Electrical - Exploded View Phaser 4400 Laser Printer Service Manual 7-25 - Xerox 4400DT | Service Manual - Page 397
2.1 item 1) 19 802E04920 Left Side Cover 20 600K79670 Screw Kit (quantity 3) 21 802K09980 Size Sensor Housing Assembly (with 5-13) S 600K79660 Hardware Kit (Includes Screws) 7-26 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 398
PL 11.1 550-Sheet Feeder (1 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-27 - Xerox 4400DT | Service Manual - Page 399
45 600K79652 Actuator & Support Kit (with 11, 12) 21 - - - - Bearing S 600K79660 Hardware Kit (Includes Screw) 22 - - - - Nudger Support Assembly 23 130E81970 Stack Height Sensor 24 - - - - Gear Clutch 25 - - - - O/W Clutch Assembly 7-28 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 400
PL 11.2 550-Sheet Feeder (2 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-29 - Xerox 4400DT | Service Manual - Page 401
19 - - - - Envelope Left Side Guide 20 - - - - Envelope Right Side Guide 21 - - - - Envelope Feeder Sub Assembly 22 - - - - Pinion Gear 23 - - - - Bottom Cover 24 - - - - Tray Extension S 600K79660 Hardware Kit (Includes Screw) 7-30 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 402
PL 12.1 Envelope Feeder (1 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-31 - Xerox 4400DT | Service Manual - Page 403
) 25 - - - - Envelope Connector 26 - - - - Main Harness Assembly 27 - - - - Clutch Harness Assembly 28 - - - - Envelope PWB 29 - - - - No Paper Harness Assembly S 600K79660 Hardware Kit (Includes Screw) 7-32 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 404
PL 12.2 Envelope Feeder (2 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-33 - Xerox 4400DT | Service Manual - Page 405
Assembly (with 2-6) 2 - - - - Turn Chute Assembly 3 - - - - Chute Assembly Connector 4 54K15061 Upper Chute Assembly 5 - - - - Duplex Drive Cover 6 - - - - Lower Duplex Chute Assembly S 600K79660 Hardware Kit (Includes Screw) 7-34 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 406
PL 13.1 Duplex (1 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-35 - Xerox 4400DT | Service Manual - Page 407
130E81970 Duplex Home Sensor 15 160K53051 Duplex PWB 16 - - - - Duplex Cover 17 130K83310 Duplex Sensor 18 - - - - Duplex Handle Label S 600K79660 Hardware Kit (Includes Screw) 7-36 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 408
PL 13.2 Duplex (2 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-37 - Xerox 4400DT | Service Manual - Page 409
Exit Chute Assembly 9 - - - - Hook Cover 10 - - - - Lower Cover 11 - - - - Cover Hinge 12 - - - - Left Cover Spring 13 - - - - Right Cover Spring S 600K79660 Hardware Kit (Includes Screw) 7-38 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 410
PL 14.1 Stacker (1 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-39 - Xerox 4400DT | Service Manual - Page 411
Part Description 1 54K22380 Inner Exit Chute 26 - - - - Assembly (with 2-43) Stacker Guide 2 - - - - Stacker Harness 27 Assembly (J21-P202) - - - - Stacker Exit Roller Assembly 24 - - - - Exit Pinch Roller 25 - - - - Offset Bearing 7-40 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 412
PL 14.2 Stacker (2 of 2) - Exploded View Phaser 4400 Laser Printer Service Manual 7-41 - Xerox 4400DT | Service Manual - Page 413
7-42 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 414
Drive Transmission to the Drum and the Transfer Roller 8-19 Drive Transmission to the Fuser Assembly 8-20 Drive Transmission to the Exit Components 8-21 Engine Logic Board and (LVPS 8-23 The High Voltage Power Supply (HVPS 8-23 Interlocks 8-24 Phaser 4400 Laser Printer Service Manual 8-1 - Xerox 4400DT | Service Manual - Page 415
Laser Trouble (U2 Error Code 8-26 Fuser Control 8-26 Fuser Temperature Control 8-26 Fuser Temperature Adjustment 8-26 Fuser Warm-up 8-26 Fuser Trouble (U4 Error Code 8-27 AC Power Shutoff to the Fuser 8-27 Fuser Function of Major Components 8-45 8-2 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 416
. 7. Cleaning - Cleans the drum surface of the remaining toner. The block diagram of the Phaser 4400 print cycle shows the sequence of events for the xerographic process and the paper flow into and out of the printer. Block Diagram of the Print Cycle Phaser 4400 Laser Printer Service Manual 8-3 - Xerox 4400DT | Service Manual - Page 417
The cut-away side view of the Phaser 4400 printer shows the location of individual components within the printer, and serves as a side view block diagram that shows the major components the print cycle. Diagram of the Print Cycle - Cut-away Side View 8-4 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 418
. The AC voltage removes any residual DC charge that was left from the previous print cycle. Block Diagram of the Drum Charge Process - Side View Phaser 4400 Laser Printer Service Manual 8-5 - Xerox 4400DT | Service Manual - Page 419
the Magnetic Roller and the CM Blade generates a small electrical charge that is transferred to the toner. The surface of the Magnetic Roller is made up of a thin sheet of conductive material. , relative to the negative charge on the Magnetic Roller. 8-6 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 420
the more negatively charged toner on the Magnetic Roller, toner transfers from the Magnetic Roller to that point on the drum. At this point there is now a visible toner image on the drum surface. Block Diagram of the Development Process - Side View Phaser 4400 Laser Printer Service Manual 8-7 - Xerox 4400DT | Service Manual - Page 421
charged toner image from the drum surface to the front of the paper. The toner image is now on the paper and the paper is now stuck to the drum surface due to the relative electrical differences. Block Diagram of the Transfer Process - Side View 8-8 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 422
- Side View Fusing The paper moves to the Fuser Assembly where it passes between the Heat Roller and the Pressure Roller. The Heat Roller melts the toner image and bonds it permanently to the paper. The paper then is transported to the output tray. Phaser 4400 Laser Printer Service Manual 8-9 - Xerox 4400DT | Service Manual - Page 423
Diagram of the Fusing and Cleaning Process - Side View The toner that the Cleaning Blade removes is collected inside the Print Cartridge. Toner that is reclaimed from the drum is not reused by the Print Cartridge. Side View of the Print Cartridge 8-10 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 424
fed from the Multi-Purpose Tray (MPT). A third path is taken if paper is fed from the Envelope Feeder Assembly option. Paper Path Flow Diagram Phaser 4400 Laser Printer Service Manual 8-11 - Xerox 4400DT | Service Manual - Page 425
Clear.\\Press i. Jam At Tray 3; Open Tray And Front Cover To Clear.\\Press i. Jam At Tray 3; Open Tray And Front Cover To Clear.\\Press i. 8-12 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 426
Jam At Exit; Open Rear Cover To Clear.\\Press i. E4-3: Exit Jam Custom Paper late off Fuser Exit Sensor within a specified time from Registration Sensor. Jam At Exit; Open Rear Cover To Clear.\\Press Jam At Rear; Open Rear Cover To Clear.\\Press i. Phaser 4400 Laser Printer Service Manual 8-13 - Xerox 4400DT | Service Manual - Page 427
Roller, Drum and Transfer Roller, Fuser, and Optional Envelope Feeder. The Exit Motor Assembly provides the power needed by the exit components. The pages following this figure show each drive section in more detail. Drive Flow Through the Printer 8-14 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 428
Gear 14 to the Pick Up Gear that is located on the end of the MPT Shaft Assembly. Drive Transmission to the MPT Roller Assembly Phaser 4400 Laser Printer Service Manual 8-15 - Xerox 4400DT | Service Manual - Page 429
Clutch Assembly. When the Turn Clutch Assembly actuates it transmits the energy to the Turn Roller Assembly. Drive Transmission to the Turn Roller Assembly 8-16 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 430
the Feed Clutch Assembly. When the Feed Clutch Assembly actuates, it transmits the energy to the Feed Roller Assembly. Drive Transmission to the Feeder Assembly Phaser 4400 Laser Printer Service Manual 8-17 - Xerox 4400DT | Service Manual - Page 431
Gear Assembly to the Registration Clutch that is located on the end of the Rubber Registration Roller. Drive Transmission to the Rubber Registration Roller 8-18 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 432
Gear drives the Transfer Roller Gear that is located on the end of the Transfer Roller Assembly. Drive Transmission to the Drum and Transfer Roller Phaser 4400 Laser Printer Service Manual 8-19 - Xerox 4400DT | Service Manual - Page 433
to the Idler Gear of the Fuser Assembly. The Idler Gear transmits energy to the Heat Roller Gear located on the Heat Roller. Note: The Fuser gear disengages from the Idler gear when the Front Cover is opened. Drive Transmission to the Fuser Assembly 8-20 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 434
on the Exit Chute Assembly. Note: The Rear Door Interlock interrupts the +24 V DC supply to the Exit Motor. Drive Transmission to the Exit Components Phaser 4400 Laser Printer Service Manual 8-21 - Xerox 4400DT | Service Manual - Page 435
print sequence. I Controls the Fuser Assembly, Laser Assembly, and Drive components. I Distributes low DC voltages to various printer components. I Monitors printer status. I Maintains a running 5 VDC, which it supplies to the Image Processor board. 8-22 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 436
for the Bias Charge Roller (BCS), Transfer Roller (TR), Drum Bias (DB), and Detack Saw (DTS). The HVPS receives +24 VDC input from the LVPS, along with nine control signals from the Engine again to reset the circuit after an overcurrent shutdown. Phaser 4400 Laser Printer Service Manual 8-23 - Xerox 4400DT | Service Manual - Page 437
Cartridge Sensor - When the Print Cartridge is absent from the printer, the sensor interrupts +5 V to the Laser Diode. This drawing shows the location of the two interlock switches and the Print Cartridge Sensor. Interlock Locations in the Printer 8-24 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 438
Board. Diagnostic The Laser Motor and the Laser Diode are always on. Printable Area Note: The Printer is capable of edge-to-edge printing. Within the 4 mm border (4 sides) the printer will print any data 6 point Arial or larger. Printable Area Phaser 4400 Laser Printer Service Manual 8-25 - Xerox 4400DT | Service Manual - Page 439
start of printer warm-up. Warm-up is complete when the Heat Roller reaches the current control temperature. If the Fuser temperature is below 100° C at start of warm-up, then warm-up finishes when the Fuser temperature reaches "standby temperature". 8-26 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 440
+/- 0 ° C Fuser Control Temperature Standby temperature (180° C) Running temperature (195° C) Fuser On Temperature Fuser control temperature - 2° C Low Trouble Temperature Approximately 155° C (Standby temperature - approximately 25° C) Phaser 4400 Laser Printer Service Manual 8-27 - Xerox 4400DT | Service Manual - Page 441
the Main Motor Assembly is on. I Low Speed, when the Main Motor Assembly is off. When printer power is switched on, or when an Interlock Switch is actuated (after being deactuated), the Fan runs at High Speed for one second, then switches to Low Speed. 8-28 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 442
paper reaches the registration position, the second side of the paper is already face up. Then the printer starts to print the second side of the paper, and transfers the completed duplex sheet to the Error Codes table on page 8-12. Duplex Paper Path Phaser 4400 Laser Printer Service Manual 8-29 - Xerox 4400DT | Service Manual - Page 443
Duplex Unit Paper Path 8-30 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 444
10.The printer transports the duplexed printed second sheet to the output tray. This process repeats for additional prints. Drive Flow The Duplex Motor Assembly generates the mechanical energy needed to run the Duplex Unit. The Drive Flow of the Duplex Unit Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 445
Sensor to the Engine Logic Board. I Provides +24 VDC and +3.3 VDC for the Duplex Motor Assembly and Sensors. Major Components of the Duplex Unit 8-32 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 446
Envelope Feeder Envelope Feeder Paper Path Paper that is fed from the optional Envelope Feeder follows the path shown. Envelope Feeder Paper Path Phaser 4400 Laser Printer Service Manual 8-33 - Xerox 4400DT | Service Manual - Page 447
of the printer, to better illustrate the components involved in the Envelope paper path. Error codes generated by paper jams in the Envelope Feeder are listed in the Paper Jam Error Codes table on page 8-12. Envelope Feeder Paper Path - Cut-away View 8-34 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 448
Drive Flow As shown, the mechanical power generated by the Main Motor Assembly is transmitted to the gears of the Envelope Feeder. Drive Flow Phaser 4400 Laser Printer Service Manual 8-35 - Xerox 4400DT | Service Manual - Page 449
the envelope. I Envelope PWB - Controls the Envelope Feeder and is the signal interface to the Engine Logic Board. Major Components of the Envelope Feeder 8-36 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 450
Stacker Stacker Paper Path Paper that is fed to the optional Stacker follows the path shown in this diagram. Stacker Paper Path Phaser 4400 Laser Printer Service Manual 8-37 - Xerox 4400DT | Service Manual - Page 451
below shows a cut-away view of the printer to better illustrate the components of the Stacker paper path. Error codes generated by paper jams in the Stacker are listed in the Paper Jam Error Codes table on page 8-12. Stacker Paper Path - Cut-away View 8-38 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 452
generates the drive power to move the Offset Roller Assembly in alternating directions. Major Components of the Stacker (1 of 2) Major Components of the Stacker (2 of 2) Phaser 4400 Laser Printer Service Manual 8-39 - Xerox 4400DT | Service Manual - Page 453
once to make sure the Offset Roller Assembly is in the home position. Duplex Operation When the printer is running in Duplex mode, the paper partially feeds out into the standard Exit Tray (under stays in affect until the Stack Full Sensor goes Low. 8-40 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 454
Paper Jam Detection The base printer and the Stacker are designed to move a sheet of paper between the detecting points, i.e., sensors, on the paper time that the paper has to leave the stacker sensor, or the Stacker Exit Sensor is actuated at power-on. Phaser 4400 Laser Printer Service Manual 8-41 - Xerox 4400DT | Service Manual - Page 455
Option Feeder Assembly Option Feeder Assembly Paper Path Paper that is fed from the Optional Feeder Assembly follows the path shown here. Option Feeder Paper Path Diagram 8-42 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 456
the printer, to better illustrate the components in the Option Feeder Assembly paper path. Error codes generated by paper jams in the Optional Feeder Trays are listed in the Paper Jam Error Codes table on page 8-12. Option Feeder Paper Path - Cut-away View Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 457
Drive Flow As shown here, the mechanical power generated by the Main Motor Assembly is transmitted to the gears of the Option Feeder Assembly Option Feeder Drive Flow 8-44 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 458
paper. I Stack Height Sensor - Detects the paper level (the position of the top sheet of paper). This sensor is actuated by the Nudger Support Assembly. I Size Switch - Mounted on the Feeder PWB and detects the Paper Tray Assembly's paper size setting. Phaser 4400 Laser Printer Service Manual 8-45 - Xerox 4400DT | Service Manual - Page 459
Major Components of the Option Feeder Assembly 8-46 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 460
Stacker Block Diagram 9-33 Envelope Feeder 9-37 Envelope Feeder P/J Table 9-37 Envelope Feeder P/J Map 9-38 Envelope Feeder Block Diagram 9-39 Envelope Feeder Wiring Diagrams 9-40 Phaser 4400 Laser Printer Service Manual 9-1 - Xerox 4400DT | Service Manual - Page 461
letter and number of the P/J coordinates with the letters and numbers on the map. 5. The P/J connector is located within the area where the coordinates cross. 9-2 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 462
Wiring Diagram Notations The wiring diagrams in this section use the following circuit notations to describe components and signal paths within the printer. Wiring Diagram Notations Phaser 4400 Laser Printer Service Manual 9-3 - Xerox 4400DT | Service Manual - Page 463
Engine P/J Table Connector Coordinate TR E19 (Map 1) DTS G28 (Map 1) P/J231 C16 (Map 1) Env PWB through P/J418. Connects the Toner Sensor to the Connector PWB Connects the to the Engine Logic Board. Connects the Fuser to the HVPS. Connects the Size PWB Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 464
Laser PWB to the Engine Logic Board. Connects the Laser PWB to the Engine Logic Board. Connects the Engine Logic Board and HVPS to the Fuser. Located on the Fuser. Connects the Fuser to the Printer. Connects the Hard Drive to the Image Processor Board. Phaser 4400 Laser Printer Service Manual 9-5 - Xerox 4400DT | Service Manual - Page 465
Base Engine P/J Maps Base Engine P/J Location Map (1 of 2) 9-6 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 466
Base Engine P/J Location Map (2 of 2) 1 910 Phaser 4400 Laser Printer Service Manual 9-7 - Xerox 4400DT | Service Manual - Page 467
Base Engine Block Diagrams Base Engine Block Diagram (1 of 4) 1 9-8 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 468
Base Engine Block Diagram (2 of 4) 2 Phaser 4400 Laser Printer Service Manual 9-9 - Xerox 4400DT | Service Manual - Page 469
Base Engine Block Diagram (3 of 4) 3 9-10 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 470
Base Engine Block Diagram (4 of 4) 4 Phaser 4400 Laser Printer Service Manual 9-11 - Xerox 4400DT | Service Manual - Page 471
Block Diagram Tray 1, Tray 2, and Tray 3 9-12 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 472
Wiring Diagrams Engine Logic Board to LVPS PWB and Fuser Assembly LVPS PWB to Fan Assembly, Front Switch Interlock Assembly, 5 VDC PS and Image Processor Board Phaser 4400 Laser Printer Service Manual 9-13 - Xerox 4400DT | Service Manual - Page 473
Engine Logic Board to HVPS PWB to Transfer Roller, Print Cartridge, and Fuser Assembly Engine Logic Board to Fuser Assembly 9-14 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 474
Engine Logic Board to Stack Full Sensor, and Rear Interlock Switch Phaser 4400 Laser Printer Service Manual 9-15 - Xerox 4400DT | Service Manual - Page 475
Feeder PWB to Low Paper Sensor, Stack Height Sensor, Feed Clutch Assembly, Turn Clutch Assembly and Motor Assembly - Diagram 1 of 2 9-16 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 476
Engine Logic Board to Size 1 PWB to Feeder PWB - Diagram 2 of 2 Phaser 4400 Laser Printer Service Manual 9-17 - Xerox 4400DT | Service Manual - Page 477
Engine Logic Board to Main Motor Assembly, Exit Motor Assembly and Print Cartridge Sensor Assembly 9-18 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 478
Engine Logic Board to Connector PWB to MPT No Paper Sensor, Registration Sensor, Registration Clutch, Toner Sensor, Pick Up Solenoid Phaser 4400 Laser Printer Service Manual 9-19 - Xerox 4400DT | Service Manual - Page 479
Engine Logic Board to Laser Assembly 9-20 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 480
Image Processor Board to Front Panel Phaser 4400 Laser Printer Service Manual 9-21 - Xerox 4400DT | Service Manual - Page 481
Harness Assembly to the Feeder PWB. J 521 E8 Connects the Size Option Harness Assembly to the Printer Assembly. (Size 1 PWB). P 531 E9 Connects the Harness Assembly to the Lower Feeder. P/J 673 D9 Connects the Motor Assembly to the Connector. 9-22 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 482
550-Sheet Feeder P/J Map 550-Sheet Feeder P/J Map Phaser 4400 Laser Printer Service Manual 9-23 - Xerox 4400DT | Service Manual - Page 483
550-Sheet Feeder Block Diagram 1 of 2 9-24 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 484
550-Sheet Feeder Block Diagram 2 of 2 Phaser 4400 Laser Printer Service Manual 9-25 - Xerox 4400DT | Service Manual - Page 485
Duplex PWB. P/J 393 J7 Connects the Duplex Sensor Harness Assembly to the Duplex Home Sensor. J 391 E8 Connects the Duplex Option Harness Assembly to the Printer Assembly. (Engine Logic Board). 9-26 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 486
Duplex Unit P/J Map Phaser 4400 Laser Printer Service Manual 9-27 - Xerox 4400DT | Service Manual - Page 487
Duplex Unit Block Diagram 9-28 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 488
Engine Logic Board to Duplex PWB Phaser 4400 Laser Printer Service Manual 9-29 - Xerox 4400DT | Service Manual - Page 489
Duplex PWB to Duplex Motor Assembly, Duplex Sensor Assembly and Duplex Home Sensor 9-30 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 490
Connector Coordinate Description P/J 202 E7 Connects the Stacker Harness Assembly Unit to the Printer Assembly. (Engine Logic Board). P/J 209 E7 Connects the Stacker Harness Assembly Unit Stacker Harness Assembly SNR to the Direction Solenoid. Phaser 4400 Laser Printer Service Manual 9-31 - Xerox 4400DT | Service Manual - Page 491
Stacker P/J Map 9-32 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 492
Stacker Block Diagram Phaser 4400 Laser Printer Service Manual 9-33 - Xerox 4400DT | Service Manual - Page 493
Engine Logic Board to Stacker PWB 9-34 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 494
Stacker PWB to Stack Full Sensor, Stacker Home Sensor, Stacker Exit Sensor Assembly and Direction Solenoid Phaser 4400 Laser Printer Service Manual 9-35 - Xerox 4400DT | Service Manual - Page 495
Stacker PWB to Drive Motor Assembly and Offset Motor Assembly 9-36 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 496
Clutch. P/J 417 G6 Connects the Sensor Harness Assembly to the Envelope Exit Sensor Assembly. P/J 418 F7 Connects the Main Harness Assembly to the Envelope Connector. Phaser 4400 Laser Printer Service Manual 9-37 - Xerox 4400DT | Service Manual - Page 497
Envelope Feeder P/J Map 9-38 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 498
Envelope Feeder Block Diagram Phaser 4400 Laser Printer Service Manual 9-39 - Xerox 4400DT | Service Manual - Page 499
Envelope Feeder Wiring Diagrams Engine Logic Board to Connector PWB to Envelope PWB 9-40 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 500
Envelope PWB to Envelope Exit Sensor Assembly, No Paper Sensor, and Clutch Phaser 4400 Laser Printer Service Manual 9-41 - Xerox 4400DT | Service Manual - Page 501
9-42 Phaser 4400 Laser Printer Service Manual - Xerox 4400DT | Service Manual - Page 502
- Xerox 4400DT | Service Manual - Page 503
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484
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486
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487
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488
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489
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491
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Service
Manual
Phaser
™
Laser Printer
4400