Xerox 1235N Service Guide

Xerox 1235N - Phaser Color Laser Printer Manual

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  • Xerox 1235N | Service Guide - Page 1
    PHASER® 1235 NETWORK COLOR PRINTER Service Quick Reference Guide 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 operating instructions unless you are qualified to do so.
  • Xerox 1235N | Service Guide - Page 2
    publication may not be reproduced in any form without permission of Xerox Corporation. Phaser®, PhaserShare®, ColorStix®, the TekColor® icon, Made For Each TekColor™ name are trademarks of Xerox Corporation. TekColor CareSM and RealSUPPORTSM are service marks of Xerox Corporation. FTP® Software is a
  • Xerox 1235N | Service Guide - Page 3
    . Use only the specified power cord and connector. For 220 VAC printers, do not apply more than 260 volts RMS between the supply conductors or between either supply conductor and ground. Use only the specified power cord and connector. Refer to a qualified service technician for changes to the cord
  • Xerox 1235N | Service Guide - Page 4
    to servicing. Rings, necklaces, and other metallic objects could come into contact with dangerous voltages and currents. Power source: This product is intended to operate from a power source that will not apply more than 120 or 250 volts rms (depending on printer model) between the supply conductors
  • Xerox 1235N | Service Guide - Page 5
    14 System controller board LEDs 14 Paper tray type sensing 15 Specifications 16 Regulatory specifications 19 Error Codes and Messages 21 Error messages 21 Troubleshooting 31 Power on self-diagnostic test 32 Print engine troubleshooting 33 Testing the print engine 33 Verifying printer operation by
  • Xerox 1235N | Service Guide - Page 6
    Manual problems 46 The printer continuously displays "Booting" or "Initializing." 46 False "No toner problems 59 Image never prints 59 Image is rotated 90 degrees 59 Image prints in black-and-white 59 Printer isn't in the Chooser 60 Windows printing problems 60 Image never prints 60 vi Phaser 1235
  • Xerox 1235N | Service Guide - Page 7
    Service Making adjustments 78 Adjustment recovery 79 Cleaning and Maintenance 81 Service preventive maintenance procedure 81 Recommended tools 82 Periodically replaced parts chassis (card cage) 94 Electrical chassis cooling fan 96 Printer unit chassis 97 Main cooling fan 99 Top cover inner frame 100
  • Xerox 1235N | Service Guide - Page 8
    boards 109 System controller board 109 Print engine controller board 110 Toner sensor board 111 Entrance sensor board 113 High voltage power supply 114 Low voltage power supply 116 Control guide assembly 146 Eject guide assembly 148 Stack full sensor 149 viii Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 9
    158 LED assembly 159 Drum contact assembly 160 Toner sensor actuators 161 Duplex unit 163 Optional paper feeder components 164 Idler roller assembly 164 Inner frame 166 Feeder clutch 169 Feeder motor 171 Feeder control board 173 Paper transport roll guide 175 Feeder drive assembly 177 Paper size
  • Xerox 1235N | Service Guide - Page 10
    assemblies 106 Removing the right paper tray guide assembly 107 Removing the left plate assembly 108 Removing the system controller board 109 Removing the print engine controller 110 Disconnecting the LED power harnesses 111 Removing the toner sensor board 112 x Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 11
    contact assembly 160 Disconnecting the LED assembly power harness 161 Removing the toner sensor actuators 162 Removing the duplex unit 163 Removing the feeder control board cover 164 Removing the idler roller assembly 165 Removing the optional feeder inner frame bottom screws 166 Service Guide xi
  • Xerox 1235N | Service Guide - Page 12
    (part 1 of 3) 215 Wiring diagram (part 2 of 3) 216 Wiring diagram (part 3 of 3) 217 Wire routing at the engine controller board 218 Wire routing at the top of the engine controller board 219 Detail of wiring passthru 220 Wiring under the top shield plate 221 xii Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 13
    clearances 16 Functional specifications 17 Electrical specifications 18 Environmental specifications 18 Printer fault messages 21 POWER Connector pinout 35 Motor and fuser roller resistances 38 Engine maintenance mode menu 62 Switch scans and the sensor and switches test 64 Motor and clutch test
  • Xerox 1235N | Service Guide - Page 14
    xiv Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 15
    Phaser® 1235 Color Printer. This manual includes troubleshooting guides, adjustment procedures and a field replaceable units (FRU) list. Topics such as printer theory of operation, configuration page details, and verifying printer operation are located on the companion Color Printer Service & Support
  • Xerox 1235N | Service Guide - Page 16
    The Phaser 1235 Color Printer The Phaser 1235 Color Printer combines a 4-color LED-based, tandem-design print engine with an EFI image processing controller board supporting Adobe's PostScript Level 3 page description language. The controller features a bi-directional parallel interface and an
  • Xerox 1235N | Service Guide - Page 17
    amount of time the printer switches into its Energy Star mode where it consumes less than 45 watts of power password on the printer's control panel. The printer supports a native PDF image processing. Processing PDF files directly requires a hard disk. PDF printing uses the printer Service Guide 3
  • Xerox 1235N | Service Guide - Page 18
    the engine senses and automatically reports the Low and Empty states. When the empty state is reached for toner, the printer terminates printing at the end of current page and displays the appropriate message on the control panel. No further jobs are accepted from any input port. 4 Phaser 1235
  • Xerox 1235N | Service Guide - Page 19
    Print engine assemblies Paper size sensing board Toner sensor board Low voltage power supply Duplex control (in duplexer) High voltage power supply Print engine circuit boards Control panel assembly Entrance sensor board 7098 Service Guide 5
  • Xerox 1235N | Service Guide - Page 20
    Print engine controller board System controller board Optional feeder Print engine circuit boards (cont'd) Feeder control Paper-size sensing board 7099 6 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 21
    assembly Toner cartridge sensors Top cover interlock switch Front cover interlock switch Belt entrance sensor Temperature Waste toner sensor sensor Humidity sensor Registration Entrance entrance cassette sensor 7100 sensor Print engine sensor and switch locations Service Guide 7
  • Xerox 1235N | Service Guide - Page 22
    Stack full sensor Multi-sheet bypass tray empty sensor OHP sensor Multi-sheet bypass position sensor Print engine sensor and switch locations (cont'd) Fuser exit sensor Belt entrance sensor 7101 8 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 23
    Duplex Gate solenoid Registration shutter solenoid Duplex drive assembly Print engine motors, clutches and solenoids Transfer belt motor assembly Registration motor Registration clutch Main feeder drive motor 7102 Service Guide 9
  • Xerox 1235N | Service Guide - Page 24
    Optional feeder Optional feeder motor and clutch Feeder motor Feeder clutch 7103 10 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 25
    The image processor board Token ring card SDRAM Fan cooled processor Features of the controller board Hard drive 0728-05 Service Guide 11
  • Xerox 1235N | Service Guide - Page 26
    lines by twenty-four characters wide. Menu up/down Item up/down Value up/down The control panel Key 0 places the printer off-line or on-line. Key 4 is an Enter key. The pairs of keys 1 whenever operator intervention is required, such as a paper jam in the printer. 12 Phaser 1235 Network Color
  • Xerox 1235N | Service Guide - Page 27
    : s Bi-directional parallel IEEE 1284-B connector. s Twisted Pair 10/100baseT Ethernet connector. With the addition of the Token Ring card the printer can connect to Token Ring network via its Ethernet interface. The printer rear panel Ethernet port Parallel port 0728-03 Service Guide 13
  • Xerox 1235N | Service Guide - Page 28
    the printer power off, then on. This reinitiates the NVRAM to factory defaults for all values except copy counts. The control panel displays Ready when complete. System controller board LEDs A power LED (PWR), when illuminated, indicates +5V is being supplied to the system controller board. The
  • Xerox 1235N | Service Guide - Page 29
    set according to the position of the paper guide. A cam interlocks the tabs with the paper guide of the paper tray. Upon insertion of the tray in the printer, four actuator tabs activate four switches. The switch sensors and actuators 0728-04 Tray switch sensors and actuators Service Guide 15
  • Xerox 1235N | Service Guide - Page 30
    .5 cm (36 in.) 30.5 cm (12 in.) 30.5 cm (12 in.) Unlimited for removal of consumables 61 cm (24 in.) for connecting computer cable and power cord Maximum deviation of 50 mm from horizontal, side-to-side, with all four feet in contact with the table surface. 16 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 31
    toner cartridges each contain one of four colors: cyan, magenta, yellow or black. The toner B5, and A6 use only premium bond laser printer or copier paper Tray feed paper weight: tray capacity Only Xerox-brand Phaser 1235 A- and A4-size transparency film is supported. Multi-sheet Service Guide 17
  • Xerox 1235N | Service Guide - Page 32
    110 VAC configuration - 8 and 10 Amp 220 VAC configuration - 4 and 5 Amp Low Voltage Power Supply +3.3 VDC + 5 V +12 V + 32 V +3.8 V High voltage Power Supply (CH) -900 to 1.4 kV (DB) -100 to 400/+300 V (SB) -200 to -700 35 dBa, Running: 55 dBa, Impulse: 57 dBa 18 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 33
    Regulatory specifications The printer is a recognized component in conformance with the following regulatory standards: s The packaged product meets ASTM D4169-93 and VCCI (CISPR 22) Class B s FCC Class B (for 115 VAC equipment) pursuant to Sub-part J of Part 15. ICES 03 Class B Service Guide 19
  • Xerox 1235N | Service Guide - Page 34
    20 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 35
    rear of the printer, inspect the gate which directs the print to the face-up output bin or the face-down output bin. 5. Test the fuser motor (which drives the exit gear train) using the test described in "Motor and clutch tests" on page 69. 6. Replace the engine controller board. Service Guide 21
  • Xerox 1235N | Service Guide - Page 36
    Printer fault messages Code Front panel message Service message A11 Jam A11, Remove Output Open Cover A, See A11-Paper Feed Jam Labels 1. with the "Motor and clutch tests" on page 69. 5. Replace the duplex unit. 6. Replace the engine controller board. 22 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 37
    Printer fault messages Code Front panel message Service message B21 Jam B21 Open Cover B, See Labels B21-Duplex Area Jam 1. Ensure the correct weight in "Switch scan test" on page 63. 3. Inspect the sensor and its wiring harness. 4. Replace the engine controller board. Service Guide 23
  • Xerox 1235N | Service Guide - Page 38
    the engine controller board. 5. Replace the printer unit chassis. EF Fuser Missing Reseat Fuser, Power Off/On EF-Fuser Unit Missing 1. Remove and reinstall the fuser. 2. install a new fuser. 3. Replace the low-voltage power supply. 4. Replace the engine controller board. 24 Phaser 1235 Network
  • Xerox 1235N | Service Guide - Page 39
    engine controller board. J5 Replace Yellow Drum J5-Replace Yellow Drum J6 Replace Magenta Drum J6-Replace Magenta Drum J7 Replace Cyan Drum J7-Replace Cyan Drum J8 Replace Black Drum J8-Replace Black and reseat them, if necessary. 4. Replace the engine controller board. Service Guide 25
  • Xerox 1235N | Service Guide - Page 40
    voltage power supply. 6. Replace the engine controller board. T32 LED Over Temperature T32 Power Off/On T32-LED Over Temp Error 1. Ensure all the main cooling fan is operating and is not blocked. 2. Ensure the printer is operating in the correct temperature environment; the printer's Service Menu
  • Xerox 1235N | Service Guide - Page 41
    is running correctly and is not blocked. 2. Turn the printer off and then on. 3. Replace the low-voltage power supply. 4. Replace the engine controller board. U7 Feeder Home Error U7 Power Off/On U7-Feeder Home Error 1. Test the manual bypass feeder home sensor using the test described in "Switch
  • Xerox 1235N | Service Guide - Page 42
    U20 Power Off/On U20-Cyan LED Bar Missing U21 Black LED Error U21 Power Off/On U21-Black LED Bar Missing 1. Ensure the LED assembly is correctly installed. 2. Inspect the wiring harnesses leading to the LED assembly. 3. Replace the engine controller board. 28 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 43
    Replace the toner sensor board. 5. Replace the engine control board. U26 Yellow Drum Error U26 Power Off/On U26-Yellow Drum Error U27 Magenta Drum Error U27 Power Off/On U27-Magenta Drum Error U28 Cyan Drum Error U28 Power Off/On U28-Cyan Drum Error U29 Black Drum Error U29 Power Off/On U29
  • Xerox 1235N | Service Guide - Page 44
    -2 Bad controller board VX2b-3 Bad controller board Disk Identify Bad hard disk drive Disk Read/Write Bad hard disk drive Disk Read Capability Bad hard disk drive Disk Write Capability Bad hard disk drive Disk Data Format Check Bad hard disk drive 30 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 45
    two approaches: s A step-by-step verification procedure that systematically confirms that particular components of the printer are properly functioning until a problem is found. s A symptom/cause scheme that lists particular printer failures or error codes and their possible causes. Service Guide 31
  • Xerox 1235N | Service Guide - Page 46
    assembly. s After the fuser reaches its idle temperature the printer is placed on line in its READY state. The print engine is initialized. If the startup page feature has not been disabled and no error occurred with the printer, the printer prints a startup page. 32 Phaser 1235 Network Color
  • Xerox 1235N | Service Guide - Page 47
    working correctly. Proceed with the next topic, "Verifying printer operation by using its self-test print" on page 34. If the printer does not make the test print, then a problem exists with the print engine. Proceed with the topic, "Verifying power supply operation" on page 34. Service Guide 33
  • Xerox 1235N | Service Guide - Page 48
    page from the system controller board. If the printer prints a test pattern, then the print engine controller board and system controller board are working correctly and the printer's problem resides with the network or host interface. Verifying power supply operation Required tools s #1 Phillips
  • Xerox 1235N | Service Guide - Page 49
    the voltages are not correct, inspect the wiring harness connecting the POWER connector of the engine controller board to the CN1 connector of the low-voltage power supply. If the harness is undamaged, replace the power supply. POWER Connector pinout Pin Voltage/Signal Level Pin 1 +12 VDC 16
  • Xerox 1235N | Service Guide - Page 50
    If the fuse is good, but the printer's power supply does not output DC voltages, replace the low-voltage power supply. Safety interlocks The printer features two safety interlock switches: s Top appear to be at fault, replace the engine controller board. 36 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 51
    topic). 3. Refer to the topic "Wiring Diagram" on page 215 for a diagram that locates each connector. 4. Turn on the printer again to see if it overloads now that the motors are disconnected from the engine driver board. If the power supply still does not function, replace it. Service Guide 37
  • Xerox 1235N | Service Guide - Page 52
    printer and disconnect the power cord. 2. With a DMM set for measuring resistance, test each motor's windings for correct resistance (disconnected from the printer at the top of the engine controller board Black Pins 1 thru 4 Yellow Pins of fuser 0728-02 38 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 53
    -picking errors s Printing jams s Paper-ejecting errors Media-based problems Media problems 1. Check that the correct type of media is being used. The customer should be using a quality laser printer paper. The printer may have trouble picking slick-finish paper. 2. Inspect the paper for bent, torn
  • Xerox 1235N | Service Guide - Page 54
    tray's side paper guides snugly adjusted against the stack of media? The guides should be neither too loose nor too tight. 5. The problem occur when printing from service tests described in "Switch scan test" on page 63. 3. Replace the engine controller board. 40 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 55
    using the service test "Switch scan test" on page 63. If the sensors test ok, then the engine controller board is probably bad. 4. Replace the paper size sensor board's wiring harness. Paper jams at the paper tray 1. Is the paper in good condition and appropriate for a laser printer? 2. Is the
  • Xerox 1235N | Service Guide - Page 56
    feed pick roller. 5. Test the manual bypass feeder sensors using the service test "Switch scan test" on page 63. 6. Inspect the wiring harness from the manual bypass feeder to the engine controller board. 7. Replace the manual bypass feeder. 8. Replace the engine controller board. Paper jams at the
  • Xerox 1235N | Service Guide - Page 57
    its sensor? Use the service test "Switch scan test" on page 63 to test the senor. 5. Replace the fuser. 6. Replace the engine controller board. Eject jams 1. Is the paper in good condition and appropriate for a laser printer? Is the paper curling? 2. Is the printer printing within its environmental
  • Xerox 1235N | Service Guide - Page 58
    unit for damage. 7. Replace the engine controller board. Fan error 1. Is power supplied to pin 1 of the fan? If yes, replace the fan. 2. Inspect the fan's wiring harness for damage. 3. Replace the low-voltage power supply 4. Replace the engine controller board. 44 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 59
    supplied to the printer is correct. 3. Does the fuser get hot? If not, replace the fuser. 4. If the fuser does warm up, verify that it is reaching the correct temperature by running the service . 6. Replace the engine controller board. 7. Replace the low-voltage power supply. Service Guide 45
  • Xerox 1235N | Service Guide - Page 60
    is correctly installed. 2. Check the condition of fuser units's connector and their corresponding receptacles on the print engine (under the fuser unit). 3. Replace the fuser unit. 4. Replace the engine controller board. 5. Replace the low-voltage power supply. 46 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 61
    6. Replace the fuser unit. 7. Replace the low-voltage power supply. 8. Replace the engine controller board. If the fuser is hot, 1. Replace the fuser 2. Replace the engine controller board Invalid memory DIMM 1. Upon power-up, the system controller board checks each DIMM for information such as data
  • Xerox 1235N | Service Guide - Page 62
    of the engine board. If not replace the engine board. (Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board.) 11. Inspect the high-voltage wiring harnesses. 12. Replace the high-voltage power supply. 48 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 63
    connector Pin 5 of the engine board. If not replace the engine board. (Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board.) 11. Inspect the high-voltage wiring harnesses. 12. Replace the high voltage power supply. Service Guide 49
  • Xerox 1235N | Service Guide - Page 64
    5 of the engine board. If not replace the engine board. (Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board.) 7. Inspect the high-voltage wiring harnesses. 8. Replace the high voltage power supply. 50 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 65
    HVOLT connector Pin 5 of the engine board. If not replace the engine board. (Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board.) 7. Inspect the high-voltage wiring harnesses. 8. Replace the high voltage power supply. Service Guide 51
  • Xerox 1235N | Service Guide - Page 66
    engine board. If not replace the engine controller board. Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board. 8. Inspect the high-voltage wiring harnesses. 9. Replace the high voltage power supply. 52 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 67
    controller board's EEPROM (lower-right corner of board) to the new engine controller board. Offsetting and fuser temperature. Offsetting occurs on specialty paper if the fuser's temperature does not match the paper loaded in the multi-sheet bypass feeder. For cold-offsetting, characterized by toner
  • Xerox 1235N | Service Guide - Page 68
    the repeating spots indicates the source of the problem. In some instances, the spots may be Toner supply roller. Replace the imaging drum unit of the affected color. s 44 mm (1.7 in.): Charging roller. Replace the imaging drum unit of the affected color. 54 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 69
    Pin 5 of the engine board. If not replace the engine controller board. Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board. 10. Inspect the high-voltage wiring harnesses. 11. Replace the high voltage power supply. Service Guide 55
  • Xerox 1235N | Service Guide - Page 70
    imaging drum unit's power terminals Ensure the engine controller board for damage or improper seating. 8. Replace the engine controller board. Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board. 56 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 71
    Pin 5 of the engine board. If not replace the engine controller board. Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board. 9. Inspect the high-voltage wiring harnesses. 10. Replace the high voltage power supply. Service Guide 57
  • Xerox 1235N | Service Guide - Page 72
    is visible. 5. Replace the engine controller board. The print is wrinkled 1. Check for an obstruction in the paper path, particularly with the feed rollers and the fuser. 2. Is the paper in good condition and appropriate size, weight, grain and grade for a laser printer? Print the Diagnostic Summary
  • Xerox 1235N | Service Guide - Page 73
    of your LaserWriter driver to ensure that it is version 8.0.x or higher. Earlier versions of the driver do not support color PostScript. 5. The application may require special instructions to print, such as those contained in a PPD file; check in the Phaser 1235 Printer CD-ROM. Service Guide 59
  • Xerox 1235N | Service Guide - Page 74
    isn't in the Chooser 1. Ensure that the printer is turned on and the printer is in its READY mode. 2. Check the Network or AppleTalk control panel to ensure the proper network or zone is selected. 3. Power-cycle the printer. 4. Check to see if the printer has not been renamed or placed in another
  • Xerox 1235N | Service Guide - Page 75
    the printer sensors, test the media transport system, test the imaging LED banks, and to reset NVRAM. To exit engine maintenance mode, while DIAGNOSTIC MODE xx.xx is displayed, press Online (0). Alternately, you can turn the power off, wait a few seconds, and then turn power back on. Service Guide
  • Xerox 1235N | Service Guide - Page 76
    values for mechanical controls are all cleared to their initial values. The consumption status of each consumables is displayed in turn. Values show are of prints made and percentage of toner consumed. The life status of the selected consumable is displayed. 62 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 77
    keys as you turn on the printer. 2. Press the Menu (1, 5) manually actuate the sensors being scanned and look for a change at the control panel. 6. Press Value (7) to stop the current test. 7. Repeat steps 2 through 5 as required. 8. To exit the switch scan test mode, press Enter (4). Service Guide
  • Xerox 1235N | Service Guide - Page 78
    64 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 79
    Manual Bypass Black Toner Switch Scan 02 Cartridge Present 1= Cyan Toner Switch Scan 02 Cartridge Present 2= Magenta Toner Switch Scan 02 Cartridge Present 3= Yellow Toner to the transfer unit. Manually rotate the registration roller unit caddy. Manually rotate the manual bypass feed roller
  • Xerox 1235N | Service Guide - Page 80
    and switches test Switch or sensor not used Manual Bypass Feeder OHP Sensor Tray 1, Size Deactuated L - Actuated H - Deactuated Density Value ***H Manual feed a sheet of paper film thru the feeder. Close the cover. Reinsert the duplex unit in the printer. Pull out the duplex unit. Lift its cover.
  • Xerox 1235N | Service Guide - Page 81
    . Place a sheet of paper inside on the sensor flag. Close the cover. Reinsert the duplex unit in the printer. Remove the tray and actuate the sensor flags on right side of tray cavity Pull Tray 2 out to test out to test sensor Remove tray 3 and toggle sensor flag behind feed rollers Service Guide 67
  • Xerox 1235N | Service Guide - Page 82
    17 4= Switch Scan 18 Switch Scan 19 Switch Scan 20 Switch Scan 21 not used Details not used not used not used not used 68 Phaser 1235 Network Color Printer
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    Before running some motor and clutch tests you must remove certain printer consumable items; refer to table below. The front panel also test constraints Motor or clutch displayed on control panel BLACK-ID MOTOR Constraints displayed on control panel REMOVE ID YELLOW-ID MOTOR Service Guide 69
  • Xerox 1235N | Service Guide - Page 84
    Motor and clutch test constraints Motor or clutch displayed on control panel Constraints displayed on control panel Details MAIN FEEDER MOTOR EXIT TRAY1 CASSETTE Run the test with Tray 1 bypass feeder and observe the paper position plate cycle up and down 70 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 85
    1. Enter the diagnosis mode by pressing and holding the Menu (1) and Enter (4) keys as you turn on the printer. 2. Press the Menu (1, 5) keys to scroll through the list of test until TEST PRINT appears on the or off. Lets you select between single-sided or double-sided printing. Service Guide 71
  • Xerox 1235N | Service Guide - Page 86
    ) T: Environmental temperature measurement (in degrees Celsius) H: Environmental humidity measurement (in units of%). The key Value (3) changes the display. 7. Press Enter (4) to end the test. 72 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 87
    the print engine's consumable counts and registration set points. 1. Enter the diagnosis mode by pressing and holding the Menu (1) and Enter (4) keys as you turn on the printer. 2. the replacement of a fuser unit. Initializes the toner use count after a toner cartridge is replaced Service Guide 73
  • Xerox 1235N | Service Guide - Page 88
    , magenta, and cyan LED heads Initialization of X-axis 0 Right. Corrections for yellow, magenta, and cyan LED heads Unit 1/1200 inch 1/1200 inch 1/1200 inch 74 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 89
    supply. 1. Enter the diagnosis mode by pressing and holding the Menu (1) and Enter (4) keys as you turn on the printer. BLACK ID UNIT YELLOW ID UNIT MAGENTA ID UNIT CYAN ID UNIT BLACK TONER YELLOW TONER MAGENTA TONER CYAN TONER amount of toner remaining in each toner cartridge. Service Guide 75
  • Xerox 1235N | Service Guide - Page 90
    supply items. The life-cycle consumption value is displayed with the item. The table below lists the menu items. 1. Press Enter (4) to end the test. Consumable life-cycle counts Upper Display TOTAL SHEETS FED BLACK ******** IMAGES Image ******** IMAGES Image 76 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 91
    the printer Xerox Corporation, 2000 ver 1.1 Gray Reference (30% Black Black Level: Current Cyan Level: 12 Current Magenta Level: Current Yellow Level: 18 Developer Bias Range: [251 - 550] Current Black Level: Current Cyan Level: Current Magenta Level: Current Yellow Level: Service Guide
  • Xerox 1235N | Service Guide - Page 92
    +2K, +3K. 3. Press Enter. The Color Adjust Page prints and the front panel displays Color Adjust Menu: Black Density. Repeat Steps 2 and 3 above until you are satisfied with the results. Color density adjustment 1. Press Item you are satisfied with the results. 78 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 93
    color adjustment routine you can choose to return the values to the factory default values by using the Color Adjust menu's Color Defaults item. The printer will be restored to the default values. Service Guide 79
  • Xerox 1235N | Service Guide - Page 94
  • Xerox 1235N | Service Guide - Page 95
    and the type of paper a customer prints on determines how critical cleaning the machine is. Users of ordinary laser Bond paper (copier paper) should have very few problems since this paper is smooth and relatively dust-free. You should thoroughly inspect and clean these printers. Service Guide 81
  • Xerox 1235N | Service Guide - Page 96
    significatly reduce the lives of toner cartridges, imaging drums and transfer belts: Printing less than 5 pages per job, opening and closing the top cover, turning the printer off and on, printing on transparencies or specialty papers and automatic two-sided printing. 82 Phaser 1235 Network Color
  • Xerox 1235N | Service Guide - Page 97
    outside of the printer with a soft to clean the LED bar. (An alcohol wipe always comes with the toner cartridge.) Print the 100% Color Stripe Pattern. If a light or streak, clean the LED lens of the affected color. Print problem caused by dirty LED lens Cleaning the pickup roller When mispicks
  • Xerox 1235N | Service Guide - Page 98
  • Xerox 1235N | Service Guide - Page 99
    (7) keys upon power up will reset all the NVRAM-stored parameters except the consumable counts. Refer to the service test procedure "Consumable count initialization" on page 73 to reset the print engine's NVRAM-stored consumable counts or the registration set points parameters. Service Guide 85
  • Xerox 1235N | Service Guide - Page 100
  • Xerox 1235N | Service Guide - Page 101
    printer does not contain any mechanical field adjustable components. Default settings and soft switch settings are covered in "Service Tests and Adjustments" on page 61. Cabinet panels Top cover Warning Switch off the power and disconnect the power cord. 1. Open the top cover. Remove the drum/toner
  • Xerox 1235N | Service Guide - Page 102
    Warning Switch off the power and disconnect the power cord. 1. Open the top cover. 2. Open the front cover. 3. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag to protect the drum left-side cover, reverse the removal order. 88 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 103
    Right-side cover Warning Switch off the power and disconnect the power cord. 1. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag to protect the drum units from light and cover Reverse these steps to install the right-side cover. Service Guide 89
  • Xerox 1235N | Service Guide - Page 104
    Rear cover Warning Switch off the power and disconnect the power cord. 1. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag to protect the drum units from light and store ects the print into the face-up tray). 90 Phaser 1235 Network Color Printer
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    Front cover Warning Switch off the power and disconnect the power cord. 1. Remove Tray 1. 2. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag to protect the drum units from light and store in a safe place. 3. Open the front cover. 4. Open the
  • Xerox 1235N | Service Guide - Page 106
    Face-up tray 1. Open the face-up tray. 2. Carefully pry the left stopper pin free of the rear cover. 3. Remove the face up tray. Removing the face-up tray Reverse these steps to install the face-up tray. 92 Phaser 1235 Network Color Printer
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    Warning Switch off the power and disconnect the power cord. 1. Open the front cover. 2. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag to protect the drum shield plate Reverse these steps to install the right shield plate. Service Guide 93
  • Xerox 1235N | Service Guide - Page 108
    engine controller. 12. Remove the disconnected harnesses from the chassis. 13. Remove the print engine controller board as shown on page 110. 14. Remove harnesses from the front of the electrical chassis. 15. Remove the 16 screws securing the electrical chassis to the printer frame. 94 Phaser 1235
  • Xerox 1235N | Service Guide - Page 109
    16. Guide the bottom harnesses as you carefully remove the electrical chassis. Removing the electrical chassis Reverse these steps to install the electrical As you reinstall the chassis, ensure that the tab is not deformed and is positioned on the end of the paper feed shaft. Service Guide 95
  • Xerox 1235N | Service Guide - Page 110
    the print engine controller board. 6. Remove the two screws and spacers securing the fan to the electrical chassis. 7. Remove the electrical chassis cooling fan. Removing the electrical chassis cooling fan Reverse these steps to install the electrical chassis cooling fan. 96 Phaser 1235 Network
  • Xerox 1235N | Service Guide - Page 111
    Printer unit chassis (and low-voltage power supply fan) Warning Switch off the power and disconnect the power cord. 1. Open the top cover. 2. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black the registration motor in-line connector (HOPFF) Service Guide 97
  • Xerox 1235N | Service Guide - Page 112
    ground wire near the power switch. 17. Disconnect connectors SHUTTER, PARTTEMP, DCL, FSENS and SHUTTER1 from the print engine controller board. 18. Remove the ten screws securing the printer unit chassis to the frame. 19. Lift the chassis about 7.5 cm (3 in.) while guiding the AC receptacle wiring
  • Xerox 1235N | Service Guide - Page 113
    cover as described in "Rear cover" on page 90. 7. Disconnect the main cooling fan's wiring harness from the low voltage power supply board. 8. Slide the main cooling fan out of the printer frame. Removing the main cooling fan Reverse these steps to install the main cooling fan. Service Guide 99
  • Xerox 1235N | Service Guide - Page 114
    right shield plate as shown on page 93. 6. Disconnect the nine LED connectors from the print engine controller board. 7. Remove the four screws securing the top shield plate to the electrical chassis. 8. Remove the shield plate. Removing the top shield plate 100 Phaser 1235 Network Color Printer
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    the harnesses from the electrical chassis. 11. Disconnect the POWER inline connector from the top cover inner frame. Removing the Remove the system controller board. 16. From the top of the chassis, remove the two screws holding the system controller board's upper guide rail. 17. Service Guide 101
  • Xerox 1235N | Service Guide - Page 116
    , carefully pull the left pivot arm out until the left side of the assembly is free of the printer. 20. Carefully pull the right pivot arm out until the right side is free. Caution Do not inner frame Reverse these steps to install the top cover inner frame. 102 Phaser 1235 Network Color Printer
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    Left/right top cover spring assembly Warning Switch off the power and disconnect the power cord. 1. Remove the top cover inner frame as described in the topic "Top cover inner frame" cover spring assembly Reverse these steps to install the left/right top cover spring assembly. Service Guide 103
  • Xerox 1235N | Service Guide - Page 118
    as shown on page 97. 5. Remove the four screws securing the lower plate to the paper tray guide assemblies 6. Disconnect CN1 from the low voltage power supply. 7. Lift the lower plate and power supplies from the tray guides. Removing the lower plate assembly 104 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 119
    feeder assembly as detailed on page 123. 9. Remove the three screws securing the left paper tray guide assembly to the bottom plate. 10. Lift and remove the assembly. Removing the left paper tray guide assembly Reverse these steps to install the left paper tray guide assembly. Service Guide 105
  • Xerox 1235N | Service Guide - Page 120
    Lift the lower metal shield plate from the right side of the metal plate and paper guide assembly. 5. Disconnect CN1 from the low voltage power supply. 6. Lift the lower plate and power supplies from the tray guides. Removing the paper tray guide assemblies 106 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 121
    assembly as detailed on page 123. 8. Remove the five screws securing the right paper tray guide assembly to the bottom plate. 9. Lift and remove the guide assembly. Removing the right paper tray guide assembly Reverse these steps to install the right paper tray guide assembly. Service Guide 107
  • Xerox 1235N | Service Guide - Page 122
    power supply fan. Let the fan rest on the front of the lower plate. 3. Remove the four screws securing the left plate assembly to the lower plate. 4. Remove the assembly. Removing the left plate assembly Reverse these steps to install the left plate assembly. 108 Phaser 1235 Network Color Printer
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    to the rear of the system controller. 2. Remove the two thumb screws securing the system controller to the printer. 3. Slide the system controller out to the rear of the printer. Removing the system controller board Reverse these steps to install the system controller board. Service Guide 109
  • Xerox 1235N | Service Guide - Page 124
    print engine controller board. 8. Remove the engine controller board. Removing the print engine controller Reverse these steps to install the print engine controller. When replacing the engine board, transfer the EEPROM from the old board to the new board. 110 Phaser 1235 Network Color Printer
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    the toner sensor board. 6. Rotate the board up to expose the component side of the board. Note Note for reassembly how the ribbon cables are routed under the sensor board in the next step. 7. Disconnect the PANEL, OPTN, STUCK, and POWER harnesses from the toner sensor board. Service Guide 111
  • Xerox 1235N | Service Guide - Page 126
    Reverse these steps to install the toner sensor board. Ensure that all harnesses are in the cable channel. Caution Ensure the ribbon cables are properly routed and dressed. Do not crunch or fold the ribbon cables while installing the toner sensor board. 112 Phaser 1235 Network Color Printer
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    spring-loaded tray 1 entrance sensor actuator as explained on page 130. 5. Remove the two screws securing the entrance sensor board. 6. Remove the board and disconnect harness from FSNS. Removing the entrance sensor board Reverse these steps to install the entrance sensor board. Service Guide 113
  • Xerox 1235N | Service Guide - Page 128
    Disconnect CN3 from the low voltage power supply. 3. Disconnect CN1 from the high voltage power supply. 4. Remove the three screws securing the high voltage power supply to the chassis. 5. Lift the high voltage power supply and the contact assembly and remove. 114 Phaser 1235 Network Color Printer
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    6. Remove the contact assembly from the high voltage power supply. Removing the high voltage power supply Reverse these steps to install the high voltage power supply. Service Guide 115
  • Xerox 1235N | Service Guide - Page 130
    power supply to the printer. Disconnect the AC ground wire from the printer frame. 4. Lift the power switch (SW1) and the low voltage power supply to remove. Removing the low voltage power supply Reverse these steps to install the low voltage power supply. 116 Phaser 1235 Network Color Printer
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    detailed in "Top cover" on page 87. 2. Remove the screw securing the left side of the control panel. 3. Lift the control panel and disconnect CN1 from the back of the panel. 4. Remove the control panel. Removing the control panel Reverse these steps to install the control panel. Service Guide 117
  • Xerox 1235N | Service Guide - Page 132
    roller to the left and remove. Removing the feed roller and nudger roller Reverse these steps to install the feed roller and nudger roller. 118 Phaser 1235 Network Color Printer
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    Retard pad 1. Remove the paper tray from the printer. 2. Remove the two springs. 3. Use a small screwdriver to carefully pry both arms free of the mounting pins. 4. Remove the retard pad. Removing the retard pad Reverse these steps to install the retard pad. Service Guide 119
  • Xerox 1235N | Service Guide - Page 134
    actuator. 7. Again reaching in through the cavity left by paper tray 1, remove the screw securing the paper-size sensing board. Note Make note of the harness routing before removing harnesses. 8. Guide the harness through the frame as you remove the board. 120 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 135
    Removing the paper size sensing board Reverse these steps to install the paper-size sensing board. Service Guide 121
  • Xerox 1235N | Service Guide - Page 136
    off the power and disconnect the power cord. 1. Remove paper tray 1. 2. Remove the screw securing the paper-size sensing actuator. 3. Remove the actuator. Removing the paper size sensing actuator Reverse these steps to install the paper-size sensing actuator. 122 Phaser 1235 Network Color Printer
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    power supply. 5. Lift the lower plate and power supplies from the tray guides. 6. Remove the four screws securing the main feeder assembly to the tray guides. 7. Disconnect harnesses from the optional feeder connector. 8. Pull harness and connectors through the printer frame. Service Guide
  • Xerox 1235N | Service Guide - Page 138
    9. Lift and remove the main feeder assembly. Removing the main feeder assembly Reverse these steps to install the main feeder assembly. 124 Phaser 1235 Network Color Printer
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    "Electrical chassis (card cage)" on page 94. 2. Remove the printer chassis as described in the topic "Printer unit chassis (and low-voltage power supply fan)" on page 97. 3. Remove the main feeder assembly as plate assembly Reverse these steps to install the main feeder assembly. Service Guide 125
  • Xerox 1235N | Service Guide - Page 140
    power cord. 1. Remove paper tray 1. Caution Take care not to break the locking tabs in the next step. 2. Release the two locking tabs and remove the roller. Removing the paper tray lift arm roller Reverse these steps to install the paper tray lift arm roller. 126 Phaser 1235 Network Color Printer
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    COVOPN from the print engine controller board. 8. Remove the three screws securing the multi-sheet bypass feeder top cover. Remove the cover. 9. Open the multi-sheet bypass feeder tray. 10. Remove the three screws (two are black) securing the multi-sheet bypass feeder to the printer. 11. Lift and
  • Xerox 1235N | Service Guide - Page 142
    Removing the multi-sheet bypass feeder Reverse these steps to install the multi-sheet bypass feeder. 128 Phaser 1235 Network Color Printer
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    the power cord. 1. Remove the multi-sheet bypass feeder as described in the topic on page 127. 2. Remove the printer unit chassis as described in the topic on page 97. 3. Remove the Tray 1 entrance sensor actuator as detailed in the topic on page 130. 4. Remove the entrance sensor board as
  • Xerox 1235N | Service Guide - Page 144
    the power and disconnect the power cord. 1. Remove the printer unit chassis as detailed in the topic on page 97. 2. From the bottom of the printer unit spring arm is on the plastic post. Reverse these steps to install the tray 1 entrance sensor actuator. 130 Phaser 1235 Network Color Printer
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    Printer unit chassis (and low-voltage power supply fan)" on page 97. 2. Remove the Tray 1 entrance sensor actuator as described in the topic "Tray 1 entrance sensor actuator" on page 130. 3. Remove the entrance sensor board located in the notch in the printer unit chassis. Service Guide 131
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    power and disconnect the power cord. 1. Open the top cover. 2. Remove the drum/toner cartridge basket and store in a lightproof bag to protect the drum units from light. 3. Push the transfer belt unit locking tabs toward the rear of the printer fully engage. 132 Phaser 1235 Network Color Printer
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    printer engine controller board. 6. Remove the screw securing the ground strap to the motor bracket. 7. Remove the E-Ring securing the clutch to registration shaft B. 8. Remove the registration clutch. Removing the registration clutch Reverse these steps to install the registration clutch. Service
  • Xerox 1235N | Service Guide - Page 148
    Registration motor assembly Warning Switch off the power and disconnect the power cord. 1. Open top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag and store in a safe place to install the registration motor assembly. 134 Phaser 1235 Network Color Printer
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    and drive gear Warning Switch off the power and disconnect the power cord. 1. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag and store in a safe place. . Note If replacing the drive gear, continue with Steps 11 and 12. Service Guide 135
  • Xerox 1235N | Service Guide - Page 150
    so that it drives the roller in the direction of paper travel. The blue plastic face should face the outside, next to the E-ring. 136 Phaser 1235 Network Color Printer
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    Warning Switch off the power and disconnect the power cord. 1. Remove tray 1. 2. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag and store in a 9. Remove the four screws securing registration roller assembly B to the printer. Service Guide 137
  • Xerox 1235N | Service Guide - Page 152
    10. Lower the assembly and slide to the left to remove. Removing the registration roller assembly B Reverse these steps to install the registration roller assembly B. 138 Phaser 1235 Network Color Printer
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    the drum/toner cartridge basket. Cover the basket in a lightproof black bag and store in a safe place. 2. Press the two latches to release the fuser unit. 3. Use the handle to lift and remove the fuser unit. Removing the fuser unit Reverse these steps to install the fuser unit. Service Guide 139
  • Xerox 1235N | Service Guide - Page 154
    power and disconnect the power cord. 1. Open the top cover. 2. Open the front cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black 6. Remove the screws securing the fuser latching handle to the printer frame. 7. Remove the left fuser latching handle. Fuser latching
  • Xerox 1235N | Service Guide - Page 155
    ) Warning Switch off the power and disconnect the power cord. 1. Remove the electrical chassis as detailed in "Electrical chassis (card cage)" on page 94. 2. Remove the printer unit chassis as detailed on (right) Reverse these steps to install the fuser latching handle (right). Service Guide 141
  • Xerox 1235N | Service Guide - Page 156
    Fuser exit roller Warning Switch off the power and disconnect the power cord. 1. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag and store in a safe place. 2. Open until the left end of the staff is free. 142 Phaser 1235 Network Color Printer
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    14. Lift the left end of the shaft and remove. Removing the fuser exit roller Reverse these steps to install the fuser exit roller. Service Guide 143
  • Xerox 1235N | Service Guide - Page 158
    Exit sensor assembly Warning Switch off the power and disconnect the power cord. 1. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag and store in a safe place the screw securing the exit sensor assembly. 144 Phaser 1235 Network Color Printer
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    12. Guide the harness through the chassis as you remove the assembly. Removing the exit sensor assembly Reverse these steps to install the exit sensor assembly. Ensure that the tab on the clutch is positioned on the pin on the paper handler. Service Guide 145
  • Xerox 1235N | Service Guide - Page 160
    frame as described in the topic "Top cover inner frame" on page 100. 8. Carefully pry the left side of the duplex guide assembly to free the duplex guide assembly from the printer frame. 9. Carefully pry the right locking tabs to free the right side of the guide. 146 Phaser 1235 Network Color
  • Xerox 1235N | Service Guide - Page 161
    10. Lift the duplex guide assembly and remove. Removing the duplex guide assembly Reverse these steps to install the duplex guide assembly. Service Guide 147
  • Xerox 1235N | Service Guide - Page 162
    in a lightproof black bag and store in a safe place. 3. Remove the five screws securing the eject guide assembly to the top cover. 4. Remove the eject guide assembly. Removing the eject guide assembly Reverse these steps to install the eject guide assembly. 148 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 163
    the toner sensor board. 6. Rotate the board up to expose the component side of the board. 7. Disconnect the STUCK connector from the toner sensor board. 8. Free the disconnected cable from all cable retainers. 9. Release the four locking tabs securing the stack full sensor. Service Guide 149
  • Xerox 1235N | Service Guide - Page 164
    10. Remove the stack full sensor. Removing the stack full sensor Reverse these steps to install the stack full sensor. 150 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 165
    power supply. 5. Remove the four screws securing the main motor assembly to the frame. 6. Lift the front of the main motor assembly about 2 cm (3/4 in.) 7. Carefully thread the high-voltage power supply fan harness through the harness guide and main motor assembly before lifting. Service Guide
  • Xerox 1235N | Service Guide - Page 166
    8. Carefully guide the ribbon cable through the assembly as you lift the main motor assembly and remove. Removing the main motor assembly Reverse these steps to install the main motor assembly. 152 Phaser 1235 Network Color Printer
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    feeder drive motor Warning Switch off the power and disconnect the power cord. 1. Remove the print unit chassis as detailed in "Printer unit chassis (and low-voltage power supply fan)" on page 97. 2. Disconnect motor Reverse these steps to install the main feeder drive motor. Service Guide 153
  • Xerox 1235N | Service Guide - Page 168
    Transfer belt motor assembly Warning Turn the power off and disconnect the power cord. 1. Remove the printer unit chassis as detailed on page 97. 2. Remove the two screws assembly to ensure proper reinstallation. 4. Disconnect the two inline connectors. 154 Phaser 1235 Network Color Printer
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    5. Remove the transfer belt motor assembly. Removing the transfer belt motor assembly Reverse these steps to install the transfer belt motor assembly. Service Guide 155
  • Xerox 1235N | Service Guide - Page 170
    plate Warning Switch off the power and disconnect the power cord. 1. Open the top cover. 2. Remove the drum/toner cartridge basket. Place them in shutter plate Reverse these steps to install the shutter plate; ensure all guide pins on the shutter plate are properly aligned when reinstalling. Move
  • Xerox 1235N | Service Guide - Page 171
    Color registration sensor assembly Warning Switch off the power and disconnect the power cord. 1. Open the top cover. 2. Remove the four imaging cartridges and basket. Cover the registration sensor assembly Reverse these steps to install the color registration sensor assembly. Service Guide 157
  • Xerox 1235N | Service Guide - Page 172
    Color registration solenoid Warning Switch off the power and disconnect the power cord. 1. Remove the printer unit chassis as shown on page 97. 2. clamps. 5. Remove the screw securing the shutter solenoid to the printer unit chassis. Removing the color registration solenoid Reverse these steps to
  • Xerox 1235N | Service Guide - Page 173
    power and disconnect the power cord. 1. Open the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black Free the harness from the LED assembly. 3. Disconnect the power harness from the toner sensor board. 4. Note the two springs on the back of the Service Guide 159
  • Xerox 1235N | Service Guide - Page 174
    imaging cartridges and basket. Cover the cartridges and store in a safe place. 3. Use a small screwdriver to carefully pry the drum contact assembly from the printer chassis. Removing the drum contact assembly Reverse these steps to install the drum contact assembly. 160 Phaser 1235 Network Color
  • Xerox 1235N | Service Guide - Page 175
    1. Remove the top cover. Remove the drum/toner cartridge basket. Cover the basket in a lightproof black bag and store in a safe place. 2. Disconnect the four LED power harnesses from the bottom of the toner sensor board. Disconnecting the LED assembly power harness 3. Close the top cover inner unit
  • Xerox 1235N | Service Guide - Page 176
    9. Remove the sensor actuator. Removing the toner sensor actuators Reverse these steps to install the toner sensor actuators. When replacing the toner sensor board, insure all harnesses are in the cable channels. 162 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 177
    , to remove the duplex unit: 1. Pull the duplex unit out until it stops. 2. While holding the right rail. pull out the left rail (with a moderate amount of force), to free it. 3. Free the right rail by moving the unit to the left and out. Service Guide 163
  • Xerox 1235N | Service Guide - Page 178
    SNS0 from the feeder control board (connector SNS0 is a six pin connector with only two wires - it may be necessary to remove the feeder control board to disconnect the harness). 4. Remove the two screws securing the idler roller assembly to the feeder frame. 164 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 179
    5. Guide the sensor wires through the frame as you remove the idler roller assembly. Removing the idler roller assembly Reverse these steps to install the idler roller assembly. Service Guide 165
  • Xerox 1235N | Service Guide - Page 180
    Inner frame Warning Switch off the power and disconnect the power cord. 1. Remove the printer from the optional paper feeder. 2. Remove the paper tray from the optional paper feeder. inner frame bottom screws 5. Turn the feeder to its right side up position. 166 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 181
    board cover plate. Remove the plate. Removing the feeder control board cover 7. Remove the idler roller assembly as explained on page 164. 8. Disconnect the PSZ and MAIN2 harnesses from the feeder control board. 9. Remove the eight screws securing the inner frame to the base frame. Service Guide
  • Xerox 1235N | Service Guide - Page 182
    10. Guide the disconnected MAIN2 harness through the frame as you remove the inner frame. Removing the optional feeder inner plate Reverse these steps to install the optional feeder inner frame. 168 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 183
    Switch off the power and disconnect the power cord. 1. Remove the printer from the optional paper feeder. 2. Remove the paper tray from the feeder. 3. Remove the four screws securing the feeder control board cover plate. Remove the plate. Removing the feeder control board cover 4. Remove the
  • Xerox 1235N | Service Guide - Page 184
    8. Remove the clutch. Removing the feeder clutch Reverse these steps to install the optional feeder clutch. 170 Phaser 1235 Network Color Printer
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    Switch off the power and disconnect the power cord. 1. Remove the printer from the optional paper feeder. 2. Remove the paper tray from the feeder. 3. Remove the four screws securing the feeder control board cover plate. Remove the plate. Removing the feeder control board cover 4. Remove the
  • Xerox 1235N | Service Guide - Page 186
    10. Remove the feed motor. Removing the feeder motor Reverse these steps to install the optional feeder motor. 172 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 187
    Remove the four screws securing the feeder control board cover plate. Remove the plate. Removing the feeder control board cover 3. Disconnect the seven harnesses connected to the feeder control board. 4. Remove the two screws securing the feeder control board to the inner frame. Service Guide 173
  • Xerox 1235N | Service Guide - Page 188
    5. Remove the feeder control board. Removing the feeder control board Reverse these steps to install the optional feeder control board. 174 Phaser 1235 Network Color Printer
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    roll guide Warning Switch off the power and disconnect the power cord. 1. Remove the printer from the optional paper feeder. 2. Remove the paper tray from the feeder. 3. Remove the four screws securing the feeder control board cover plate. Remove the plate. Removing the feeder control board cover
  • Xerox 1235N | Service Guide - Page 190
    8. Remove the guide. Removing the paper transport roll guide Reverse these steps to install the paper transport roll guide. 176 Phaser 1235 Network Color Printer
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    Switch off the power and disconnect the power cord. 1. Remove the printer from the optional paper feeder. 2. Remove the paper tray from the feeder. 3. Remove the four screws securing the feeder control board cover plate. Remove the plate. Removing the feeder control board cover plate 4. Remove
  • Xerox 1235N | Service Guide - Page 192
    release the two locking tabs. Remove the feeder drive assembly Removing the feeder drive assembly Reverse these steps to install the feeder drive assembly. 178 Phaser 1235 Network Color Printer
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    Warning Switch off the power and disconnect the power cord. 1. Remove paper tray 2/3. 2. Remove the screw securing the paper size sensing actuator. 3. Remove the actuator. Removing the paper size sensing actuator Reverse these steps to install the paper size sensing actuator. Service Guide 179
  • Xerox 1235N | Service Guide - Page 194
    and disconnect the power cord. 1. Remove the printer from the optional paper feeder. Note If removing the size sensing board from feeder 3, remove feeder 2 from feeder 3. 2. Remove the paper tray from the feeder. 3. Remove the four screws securing the feeder control board cover plate. Remove
  • Xerox 1235N | Service Guide - Page 195
    Lower connector Warning Switch off the power and disconnect the power cord. 1. Remove the printer from the optional paper feeder. 2. Remove the paper tray 2 from the feeder. 3. Separate feeder 2 from feeder 3 4. Remove the four screws securing the feeder control board cover plate. Remove the plate.
  • Xerox 1235N | Service Guide - Page 196
    8. Guide the harness through the feeder as you remove the lower connector. Removing the lower connector Reverse these steps to install the lower connector. 182 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 197
    feeder. 3. Remove the four screws securing the feeder control board cover plate. Remove the plate. Removing the feeder control board cover plate 4. Disconnect harness MAIN1 from the feeder control board. 5. Remove the two screws securing the upper connector to the feeder frame. Service Guide 183
  • Xerox 1235N | Service Guide - Page 198
    6. Guide the harness through the feeder as you remove the upper connector. Removing the upper connector Reverse these steps to install the upper connector. 184 Phaser 1235 Network Color Printer
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    Tray 2/3 feed roller and nudger roller Warning Switch off the power and disconnect the power cord. 1. Remove paper tray 2/3. 2. Release the locking tab on the left end of the feed roller. and nudger roller Reverse these steps to install the tray 2/3 feed roller and nudger roller. Service Guide 185
  • Xerox 1235N | Service Guide - Page 200
  • Xerox 1235N | Service Guide - Page 201
    FRU List This topic provides a list of field replaceable units for the printer. Changes to Xerox instruments are made to accommodate improved components as they become available. It is of item 1.1)" indicates that the part is included with item 1.2.1 (PL1.2, line item 1). Service Guide 187
  • Xerox 1235N | Service Guide - Page 202
    Table 1 FRU parts list of the printer cabinet Fig 1 Part parts number Name and description 1 802E33490 Top Cover 2 802K24020 Right Side Up Tray 10 - - - - - Label (part of Rear Cover) S - - - - - Screw (part of item Hardware Kit p.n. 600K89010) 188 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 203
    Figure 1 Cabinet FRUs Service Guide 189
  • Xerox 1235N | Service Guide - Page 204
    Toner Sensor Board 3 - - - - - Toner Sensor Actuator (part of Flag Kit, p.n. 600K88990)) 4 056E04120 Control Panel Bezel (English) 056E04660 Control Panel Bezel (Icon) 5 - - - - - Control Full Sensor w/actuator 13 038K13450 Eject Guide Assembly 14 - - - - Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 205
    Figure 2 Top cover FRUs Service Guide 191
  • Xerox 1235N | Service Guide - Page 206
    Sensor Assembly 815E06790 Registration Shutter Plate 121K26000 Registration Shutter Solenoid - - - - - Shutter Spring (part of Hardware Kit, p.n. 600K89010) 116-0992-00 Low-Voltage Power Supply Fan - - - - - Screw (part of Hardware Kit, p.n. 600K89010) 192 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 207
    Figure 3 Printer chassis FRUs (1 of 2) Service Guide 193
  • Xerox 1235N | Service Guide - Page 208
    Motor 9 - - - - - Gear H1(part of Gear Kit, p.n. 600K89000) 10 - - - - - Gear H2 (part of Gear Kit, p.n. 600K89000) 11 - - - - - Lower Plate 12 116-1058-00 High-Voltage Power Supply Fan S - - - - - Screw (part of Hardware Kit, p.n. 600K89010) 194 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 209
    Figure 4 Printer chassis FRUs (2 of 2) Service Guide 195
  • Xerox 1235N | Service Guide - Page 210
    Table 5 FRU of the paper tray Fig 5 parts 1 Part number 050K50630 Name and description Paper Tray Cassette 2 600K89020 Retard Pad and Springs Kit 196 Phaser 1235 Network Color Printer
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    Figure 5 Paper tray FRUs Service Guide 197
  • Xerox 1235N | Service Guide - Page 212
    SIze Sensing Board w/Harness 8 Guide Assembly (includes items 2, 4, 5, 8-10, 17, 19) 19 - - - - - Paper Tray Lift Arm (Left) (part of item 18) 20 - - - - - Duplex Connector (part of item 1) S - - - - - Screw (part of Hardware Kit, p.n. 600K89010) 198 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 213
    Figure 6 Paper tray guide FRUs Service Guide 199
  • Xerox 1235N | Service Guide - Page 214
    Assembly 5 - - - - - Multi-sheet Bypass OHP Sensor (part of item 1) 6 - - - - - Multi-sheet Bypass Tray Empty Sensor (part of item 1) S - - - - - Screw (part of Hardware Kit, p.n. 600K89010)) 200 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 215
    Figure 7 Multi-sheet bypass feeder FRUs Service Guide 201
  • Xerox 1235N | Service Guide - Page 216
    Low Voltage Power Supply (230V) 2 105K25120 High Voltage Power Supply 3 - - - - - High Voltage Tape Harness (part Harness Kit, p.n. 600K88980)) 4 127K35220 Electrical Chassis Cooling Fan 5 140E45640 Print Engine Controller Board 6 672-1595-00 System Controller Board (Image Processor
  • Xerox 1235N | Service Guide - Page 217
    Figure 8 Electrical components FRUs Service Guide 203
  • Xerox 1235N | Service Guide - Page 218
    Table 9 FRUs of the duplexer unit Fig 9 Part parts number Name and description 1 022K78640 Duplexer Transport Assembly 204 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 219
    Figure 9 Duplexer unit Service Guide 205
  • Xerox 1235N | Service Guide - Page 220
    Fig 10 Part parts number Name and description 1 140E46240 Feeder Control Board 2 962K00700 Upper Connector w/harness 3 962K00690 Lower Connector w/ Size Sensing Board w/Harness 050K50630 Paper Tray Cassette 022K79600 Lower Tray Assembly (with tray) 206 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 221
    Figure 10 Lower Tray Assembly FRUs Service Guide 207
  • Xerox 1235N | Service Guide - Page 222
    number Name and description 600K89000 Gear Kit - - - - - Main Feeder Drive Gear - - - - - Gear H1 - - - - - Gear H2 - - - - - Fuser Drive Gear (A) - - - - - Fuser Drive Gear (B) - - - - - Fuser Drive Gear (C) 208 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 223
    - A Reg Exit Sensor Actuator - - - - - Toner Sensor Actuator Table 14 Harness kit Part number Name and description - Control Panel Tape Harness - - - - - HV Tape Harness - - - - - 26 pin LED connector - - - - - Numerous other harnesses (cables) to be added soon. Service Guide 209
  • Xerox 1235N | Service Guide - Page 224
    Drum (Black) (1235) 013R90133 Imaging Drum (Cyan) (1235) 013R90134 Imaging Drum (Magenta) (1235) 013R90135 Imaging Drum (Yellow) (1235) 016-1934-00 Cyan/Magenta/Yellow Imaging Drum Rainbow Pack (1235) 001R00559 Transfer Belt Unit (1235) 801K01300 Drum/Toner Cartridge Basket 210 Phaser 1235
  • Xerox 1235N | Service Guide - Page 225
    This topic illustrates the test prints produced by the printer. The topic "Printing and print quality problems" on page 48 discusses solutions to problems revealed in the test prints. Interpreting the 100% bar meets its neighbor. Each bar is separated by a thin black line. 0728-16 Service Guide 211
  • Xerox 1235N | Service Guide - Page 226
    problems. Look for: 1. Solid fills in the color blocks. 2. Ensure the small text is legible and not broken. 0728-17 Color Balance and Density Adjustment Test Page Repeat as needed 1. Adjust Black Density until "Current"=30% Black Halftone BLACK " on page 77. 212 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 227
    Pattern is a full-page, fill made up of a 35% gray tint. It is useful for isolating black imaging and LED head problems. Look for uniform fill with no banding or lines. 0728-19 Interpreting the Blank Print (with crosshatch) areas of a print as well as residual offsetting. 0728-20 Service Guide 213
  • Xerox 1235N | Service Guide - Page 228
    Pattern Magenta Step Test Pattern Yellow Step Test Pattern Black Step Test Pattern Interpreting the Step Test Patterns The Step . Use these pages to isolate primary color imaging or LED head problems. Look for uniform transitions from dark to light. 0728-21 214 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 229
    Wiring Diagram Wiring diagram (part 1 of 3) Service Guide 215
  • Xerox 1235N | Service Guide - Page 230
    Wiring diagram (part 2 of 3) 216 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 231
    Wiring diagram (part 3 of 3) Service Guide 217
  • Xerox 1235N | Service Guide - Page 232
    Bundle wires thru EMI coils Wire routing at the engine controller board 218 Phaser 1235 Network Color Printer Tie wraps
  • Xerox 1235N | Service Guide - Page 233
    Tie wrap Wire routing at the top of the engine controller board Service Guide 219
  • Xerox 1235N | Service Guide - Page 234
    Detail of wiring passthru 220 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 235
    Ensure wiring harness is routed inside the wiring shield Wiring under the top shield plate Make sure wiring is not pinched by top shield plate when it is installed Service Guide 221
  • Xerox 1235N | Service Guide - Page 236
    222 Phaser 1235 Network Color Printer
  • Xerox 1235N | Service Guide - Page 237
    NOTES
  • Xerox 1235N | Service Guide - Page 238
    NOTES
  • Xerox 1235N | Service Guide - Page 239
    NOTES
  • Xerox 1235N | Service Guide - Page 240
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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
operating instructions unless you are qualified
to do so.
This printing:
December 2000
071-0728-00
PHASER® 1235
NETWORK COLOR PRINTER
Service Quick Reference Guide