Service Guide
Page 8
Left plate assembly 108 Electronic 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 panel 117 Paper feed components 118 Tray 1 feed roller and nudger roller 118 Retard pad 119 Paper-size sensing board 120 Paper-size sensing actuator 122... latching handle (right) 141 Fuser exit roller 142 Exit sensor assembly 144 Duplex guide assembly 146 Eject guide assembly 148 Stack full sensor 149 viii Phaser 1235 Network Color Printer
Left plate assembly 108 Electronic 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 panel 117 Paper feed components 118 Tray 1 feed roller and nudger roller 118 Retard pad 119 Paper-size sensing board 120 Paper-size sensing actuator 122... latching handle (right) 141 Fuser exit roller 142 Exit sensor assembly 144 Duplex guide assembly 146 Eject guide assembly 148 Stack full sensor 149 viii Phaser 1235 Network Color Printer
Service Guide
Page 12
... 205 Lower Tray Assembly FRUs 207 Wiring diagram (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
... 205 Lower Tray Assembly FRUs 207 Wiring diagram (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
Service Guide
Page 35
... print to see if the error re-occurs. Clean the bypass feeder's pick roller. 3. Printer fault messages Code Front panel message Service message A6 Jam A6, Remove Output Open Cover A, See A6-Bypass Feeder Jam Labels 1. Replace the engine controller board. When an error code first occurs, cycle power on page 69. 4. Replace...
... print to see if the error re-occurs. Clean the bypass feeder's pick roller. 3. Printer fault messages Code Front panel message Service message A6 Jam A6, Remove Output Open Cover A, See A6-Bypass Feeder Jam Labels 1. Replace the engine controller board. When an error code first occurs, cycle power on page 69. 4. Replace...
Service Guide
Page 36
...tray. 2. Test the exit solenoid with the "Motor and clutch tests" on page 69. 4. Replace the engine controller board. 22 Phaser 1235 Network Color Printer Inspect the wiring for the registration clutch and registration motor. 6. Ensure there are no obstructions in "Motor ...and clutch tests" on page 69. Replace the engine controller board. Inspect the operation of obstructions. 4. Test the registration motor ...
...tray. 2. Test the exit solenoid with the "Motor and clutch tests" on page 69. 4. Replace the engine controller board. 22 Phaser 1235 Network Color Printer Inspect the wiring for the registration clutch and registration motor. 6. Ensure there are no obstructions in "Motor ...and clutch tests" on page 69. Replace the engine controller board. Inspect the operation of obstructions. 4. Test the registration motor ...
Service Guide
Page 37
... duplex motor and clutch as described in "Switch scan test" on page 69. 4. Clean the pick rollers. 3. Replace the engine controller board. Inspect the switch and ensure the switch's actuator is installed correctly. 2. Ensure the output bin full sensor flag operates...Cover A Open Close Top Cover A E9-Top Cover A Open 1. Replace the engine controller board. Close the cover. 2. Replace the paper tray sensor board or its wiring harness. 4. Replace the engine controller board. Printer fault messages Code Front panel message Service message B21 Jam B21 Open Cover B, See...
... duplex motor and clutch as described in "Switch scan test" on page 69. 4. Clean the pick rollers. 3. Replace the engine controller board. Inspect the switch and ensure the switch's actuator is installed correctly. 2. Ensure the output bin full sensor flag operates...Cover A Open Close Top Cover A E9-Top Cover A Open 1. Replace the engine controller board. Close the cover. 2. Replace the paper tray sensor board or its wiring harness. 4. Replace the engine controller board. Printer fault messages Code Front panel message Service message B21 Jam B21 Open Cover B, See...
Service Guide
Page 38
...the transfer belt unit. 3. Replace the engine controller board. Remove the assembly and reseat it, if necessary. 3. Replace the engine controller board. 4. EA Black Drum Missing Reseat ...printer unit chassis. Remove and reinstall the fuser. 2. Replace the engine controller board. 5. Ensure they are clean and move up and down freely. Inspect the switch's wiring harness. 5. Remove and re-install the transfer belt unit. 2. Inspect the switch and ensure the switch's actuator is not broken. 3. Replace the engine controller board. 24 Phaser 1235 Network Color Printer...
...the transfer belt unit. 3. Replace the engine controller board. Remove the assembly and reseat it, if necessary. 3. Replace the engine controller board. 4. EA Black Drum Missing Reseat ...printer unit chassis. Remove and reinstall the fuser. 2. Replace the engine controller board. 5. Ensure they are clean and move up and down freely. Inspect the switch's wiring harness. 5. Remove and re-install the transfer belt unit. 2. Inspect the switch and ensure the switch's actuator is not broken. 3. Replace the engine controller board. 24 Phaser 1235 Network Color Printer...
Service Guide
Page 39
... Replace Cyan Drum J7-Replace Cyan Drum J8 Replace Black Drum J8-Replace Black Drum 1. Replace the engine controller board. Turn the printer off and on page 73. 3. If a new transfer belt has been installed but the print engine continues to ask for a new fuser, reset the fuser life count using the topic "Consumable count...
... Replace Cyan Drum J7-Replace Cyan Drum J8 Replace Black Drum J8-Replace Black Drum 1. Replace the engine controller board. Turn the printer off and on page 73. 3. If a new transfer belt has been installed but the print engine continues to ask for a new fuser, reset the fuser life count using the topic "Consumable count...
Service Guide
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... T29-Temp Sensor Error T30 RH Sensor Error T30 Power Off/On T30-RH Sensor Error 1. Replace the engine controller board. 26 Phaser 1235 Network Color Printer Replace the drum unit. 4. Ensure the tray is not blocked. 2. Replace the engine controller board. T32 LED Over Temperature T32 Power Off/On T32-LED Over Temp Error 1. Replace the LED heads...
... T29-Temp Sensor Error T30 RH Sensor Error T30 Power Off/On T30-RH Sensor Error 1. Replace the engine controller board. 26 Phaser 1235 Network Color Printer Replace the drum unit. 4. Ensure the tray is not blocked. 2. Replace the engine controller board. T32 LED Over Temperature T32 Power Off/On T32-LED Over Temp Error 1. Replace the LED heads...
Service Guide
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... and then on. 3. Replace the engine controller board. U6 Power Supply Error U6 Power Off/On U6-Power Supply Error 1. Turn the printer off and then on page 63. 3. Replace the engine controller board. Inspect the electrical chassis fan to see if it is running and not blocked. ...bypass feeder home sensor using the test described in "Switch scan test" on page 85. 3. Replace the engine controller board. Replace the engine controller board. Replace the fan. 4. Printer fault messages Code Front panel message Service message T1 Fuser Upper Error T1 Power Off/On T1-Fuser Upper ...
... and then on. 3. Replace the engine controller board. U6 Power Supply Error U6 Power Off/On U6-Power Supply Error 1. Turn the printer off and then on page 63. 3. Replace the engine controller board. Inspect the electrical chassis fan to see if it is running and not blocked. ...bypass feeder home sensor using the test described in "Switch scan test" on page 85. 3. Replace the engine controller board. Replace the engine controller board. Replace the fan. 4. Printer fault messages Code Front panel message Service message T1 Fuser Upper Error T1 Power Off/On T1-Fuser Upper ...
Service Guide
Page 42
... the engine control board to the print engine. Ensure the LED assembly is loaded correctly in the paper path. 4. Clean the pick and registration rollers. 3. Turn the printer off and on the printer chassis (covered by a flexible metal plate). 3. Replace the engine controller board. 28 Phaser 1235 Network Color Printer Also ensure the paper is correctly installed. 2. Replace the engine controller board. U15 Control Panel...
... the engine control board to the print engine. Ensure the LED assembly is loaded correctly in the paper path. 4. Clean the pick and registration rollers. 3. Turn the printer off and on the printer chassis (covered by a flexible metal plate). 3. Replace the engine controller board. 28 Phaser 1235 Network Color Printer Also ensure the paper is correctly installed. 2. Replace the engine controller board. U15 Control Panel...
Service Guide
Page 43
Inspect he toner sensor boards wiring harness. 4. Replace the toner sensor board. 5. Replace the engine control board. Replace the engine controller board. 5. Ensure they are clean and move up and down freely. Replace the print unit chassis. Remove and install the drum unit. 2. Remove the... Cyan Drum Error U28 Power Off/On U28-Cyan Drum Error U29 Black Drum Error U29 Power Off/On U29-Black Drum Error 1. Printer fault messages Code Front panel message Service message U22 Yellow Toner Missing Reseat Toner U22-Yellow Toner Missing U23 Magenta Toner Missing Reseat Toner...
Inspect he toner sensor boards wiring harness. 4. Replace the toner sensor board. 5. Replace the engine control board. Replace the engine controller board. 5. Ensure they are clean and move up and down freely. Replace the print unit chassis. Remove and install the drum unit. 2. Remove the... Cyan Drum Error U28 Power Off/On U28-Cyan Drum Error U29 Black Drum Error U29 Power Off/On U29-Black Drum Error 1. Printer fault messages Code Front panel message Service message U22 Yellow Toner Missing Reseat Toner U22-Yellow Toner Missing U23 Magenta Toner Missing Reseat Toner...
Service Guide
Page 48
... on, turn on , is disconnected). If the printer prints a test pattern, then the print engine controller board and system controller board are working . 3. s Checking its self-test print 1. Select any test print. 5. Press the Menu (1, 5) buttons to navigate to the printer. Otherwise, replace the power supply fan. 34 Phaser 1235 Network Color Printer When the Ready message is not correct...
... on, turn on , is disconnected). If the printer prints a test pattern, then the print engine controller board and system controller board are working . 3. s Checking its self-test print 1. Select any test print. 5. Press the Menu (1, 5) buttons to navigate to the printer. Otherwise, replace the power supply fan. 34 Phaser 1235 Network Color Printer When the Ready message is not correct...
Service Guide
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... at the POWER connector on page 36. If the +5 and +32 VDC voltages measure correctly, but the printer does not operate correctly, then proceed to the topic, "Safety interlocks" on the bottom of the print engine controller board for +3.3VDC, +5 VDC, +12 VDC and +32 VDC. (You must remove the right side cover and... right shield plate to access the engine controller board.) If the voltages are not being output by the power supply, proceed to the CN1 connector of the low-voltage power supply. If the harness ...
... at the POWER connector on page 36. If the +5 and +32 VDC voltages measure correctly, but the printer does not operate correctly, then proceed to the topic, "Safety interlocks" on the bottom of the print engine controller board for +3.3VDC, +5 VDC, +12 VDC and +32 VDC. (You must remove the right side cover and... right shield plate to access the engine controller board.) If the voltages are not being output by the power supply, proceed to the CN1 connector of the low-voltage power supply. If the harness ...
Service Guide
Page 50
...door-opened switch. If you find a switch that is now accessible. Turn off the printer. 6. With a DMM set to be at fault, replace the engine controller board. 36 Phaser 1235 Network Color Printer If no motors appear to measure resistance, test each switch's wiring harness for pinches, nicks or... supply does not output DC voltages, replace the low-voltage power supply. Safety interlocks The printer features two safety interlock switches: s Top door-opened switch. Turn off the printer. 2. When the front cover door is opened and closed. 7. Inspecting the low-voltage ...
...door-opened switch. If you find a switch that is now accessible. Turn off the printer. 6. With a DMM set to be at fault, replace the engine controller board. 36 Phaser 1235 Network Color Printer If no motors appear to measure resistance, test each switch's wiring harness for pinches, nicks or... supply does not output DC voltages, replace the low-voltage power supply. Safety interlocks The printer features two safety interlock switches: s Top door-opened switch. Turn off the printer. 2. When the front cover door is opened and closed. 7. Inspecting the low-voltage ...
Service Guide
Page 52
... being installed to connector HOPFF pins 5 thru 8 Fuser unit New fuser: The resistance between ... Used fuser: The between pins C and D of the engine controller board Black Pins 1 thru 4 Yellow Pins 5 thru 8 magenta Pins 9 thru 12 Cyan Pins 13 thru 16 Transfer belt motor Registration motor Fuser motor Main...roller will be O Ω, a fuse. Turn off the printer and disconnect the power cord. 2. The fuse indicates a new fuser and is blown within seconds of fuser 0728-02 38 Phaser 1235 Network Color Printer With a DMM set for measuring resistance, test each motor's ...
... being installed to connector HOPFF pins 5 thru 8 Fuser unit New fuser: The resistance between ... Used fuser: The between pins C and D of the engine controller board Black Pins 1 thru 4 Yellow Pins 5 thru 8 magenta Pins 9 thru 12 Cyan Pins 13 thru 16 Transfer belt motor Registration motor Fuser motor Main...roller will be O Ω, a fuse. Turn off the printer and disconnect the power cord. 2. The fuse indicates a new fuser and is blown within seconds of fuser 0728-02 38 Phaser 1235 Network Color Printer With a DMM set for measuring resistance, test each motor's ...
Service Guide
Page 54
... paper guides snugly adjusted against the stack of the pick rollers. 2. The problem occur when printing from a different tray? 6. a type the printer can handle? 9. Replace the paper pick rollers. Is it is properly installed in the tray. 2. Remove the paper tray and actuate the paper... tray. 10. Is the media excessively curled? 8. Paper tray indicates it is empty when it clean? 3. Replace the engine controller board. 40 Phaser 1235 Network Color Printer Make sure that the media is not The procedure for troubleshooting this problem applies to the left of media? Does the pick...
... paper guides snugly adjusted against the stack of the pick rollers. 2. The problem occur when printing from a different tray? 6. a type the printer can handle? 9. Replace the paper pick rollers. Is it is properly installed in the tray. 2. Remove the paper tray and actuate the paper... tray. 10. Is the media excessively curled? 8. Paper tray indicates it is empty when it clean? 3. Replace the engine controller board. 40 Phaser 1235 Network Color Printer Make sure that the media is not The procedure for troubleshooting this problem applies to the left of media? Does the pick...
Service Guide
Page 55
... installation. 8. Print the Diagnostic Summary Page to the engine controller board. 6. Remove the paper tray and inspect the paper tray lift levers on page 63. Does the paper feed motor run? Test the printer's paper size sensors using the service test "Switch scan.... 7. Check the gear train for a laser printer? 2. Are the pick rollers dirty? Replace the paper size sensor board's wiring harness. Check the motor's wiring harness and connection (HOPFF) to determine the printer's environmental conditions. 3. Replace the engine controller board. Inspect the paper tray for damage to ...
... installation. 8. Print the Diagnostic Summary Page to the engine controller board. 6. Remove the paper tray and inspect the paper tray lift levers on page 63. Does the paper feed motor run? Test the printer's paper size sensors using the service test "Switch scan.... 7. Check the gear train for a laser printer? 2. Are the pick rollers dirty? Replace the paper size sensor board's wiring harness. Check the motor's wiring harness and connection (HOPFF) to determine the printer's environmental conditions. 3. Replace the engine controller board. Inspect the paper tray for damage to ...
Service Guide
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...printer's environmental conditions. 3. Test, and if necessary, replace the registration motor. Operate it with an a dry, lint-free cloth if debris is visible. 4. Use only Xerox...Phaser 1235 Network Color Printer Clean with an a dry, lint-free cloth if debris is visible or replace the manual bypass feed pick roller. 5. Print the Diagnostic Summary Page to the engine controller board. 7. Replace the engine controller board... operate correctly? Check for this printer. Is the paper in the paper path. 2. Check the paper path for a laser printer? 2. Test the manual bypass feeder...
...printer's environmental conditions. 3. Test, and if necessary, replace the registration motor. Operate it with an a dry, lint-free cloth if debris is visible. 4. Use only Xerox...Phaser 1235 Network Color Printer Clean with an a dry, lint-free cloth if debris is visible or replace the manual bypass feed pick roller. 5. Print the Diagnostic Summary Page to the engine controller board. 7. Replace the engine controller board... operate correctly? Check for this printer. Is the paper in the paper path. 2. Check the paper path for a laser printer? 2. Test the manual bypass feeder...
Service Guide
Page 57
... the paper excessively curved after passing through the fuser? Does the exit sensor flag properly actuate its sensor? Replace the engine controller board. Inspect the duplex unit's electrical connector for a laser printer? Replace the engine controller board. Service Guide 43 Eject jams 1. Try flipping the paper over in the duplex unit 1. Is the duplex unit correctly...
... the paper excessively curved after passing through the fuser? Does the exit sensor flag properly actuate its sensor? Replace the engine controller board. Inspect the duplex unit's electrical connector for a laser printer? Replace the engine controller board. Service Guide 43 Eject jams 1. Try flipping the paper over in the duplex unit 1. Is the duplex unit correctly...
Service Guide
Page 58
...Replace the drum imaging unit. Fan error 1. Ensure that they are properly installed. 2. Imaging drum unit up and down error 1. Remove an assembly from the printer to ensure that the drum imaging units are not damaged. 3. If a drum contact assembly is correctly installed and that each imaging drum motor rotate. Is.... 3. Test the drum contact assemblies using the service test "Motor and clutch tests" on page 63. Inspect the gear drive for damage. 3. Replace the engine controller board. Replace the engine controller board. 44 Phaser 1235 Network Color Printer
...Replace the drum imaging unit. Fan error 1. Ensure that they are properly installed. 2. Imaging drum unit up and down error 1. Remove an assembly from the printer to ensure that the drum imaging units are not damaged. 3. If a drum contact assembly is correctly installed and that each imaging drum motor rotate. Is.... 3. Test the drum contact assemblies using the service test "Motor and clutch tests" on page 63. Inspect the gear drive for damage. 3. Replace the engine controller board. Replace the engine controller board. 44 Phaser 1235 Network Color Printer