Lexmark C 746 Service Manual

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52 Flash Full • Select Continue to clear the message and continue printing.
Note: Downloaded fonts and macros not previously stored in flash memory are deleted.
• Delete fonts, macros, and other data stored in flash memory.
• Install a larger capacity flash memory card.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
53 Unformatted Flash  • Select Continue to clear the message and continue printing.
• Format the flash memory before storing any resources on it. If the error message 
remains, replace the flash memory.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
54 Serial option  
error• Make sure the serial link is set up correctly and the appropriate cable is in use.
• Make sure the serial interface parameters (protocol, baud, parity, and data bits) are set 
correctly on the printer and host computer.
• Select Continue to clear the message and continue printing.
The job may not print correctly.
• POR the printer. If this does not fix the problem, replace the PCI card. 
54 Std Network
Software Error• Select Continue to clear the message and continue printing. The job may not print 
correctly.
• Program new firmware for the network interface.
• POR the printer. If this does not fix the problem, replace the PCI card. 
55 Unsupported Option 
in Slot 1. Turn the printer off.
2. Unplug the power cord from the wall outlet.
3. Remove the unsupported option.
4. Connect the power cord to a properly grounded outlet.
5. Turn the printer on.
If this does not fix the problem, replace the system board. See “System board removal” on 
page 4-155.
56 Standard Parallel 
Port Disabled• Select Continue to clear the message. The printer discards any data received through 
the parallel port.
• Make sure the Parallel Buffer menu item is not set to Disabled.
• If this does not fix the problem, replace the PCI card. 
56 Parallel Port  
Disabled• Select Continue to clear the message. The printer discards any data received through 
the parallel port.
• Make sure the Parallel Buffer menu item is not set to Disabled.
• If this does not fix the problem, replace the PCI card. 
56 Serial Port  
Disabled• Select Continue to clear the message. The printer discards any data received through 
the serial port.
• Make sure the Serial Buffer menu item is not set to Disabled.
• If this does not fix the problem, replace the PCI card. 
56 Standard USB Port 
Disabled• Select Continue to clear the message.
The printer discards any data received through the USB port.
• Make sure the USB Buffer menu item is not set to Disabled.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155. Error code   Action  
						

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57 Configuration 
Change
Held Jobs May Not 
Be RestoredConfiguration changes may be:
• Code version changes
• Paper handling options removed
• The disk was installed from a different model or speed of printer.
58 Too Many Flash 
OptionsToo many flash options are installed. To continue:
1. Turn off and unplug the printer.
2. Remove the excess flash memory.
3. Plug in the printer, and turn it on.
If this does not fix the problem, replace the system board. See “System board removal” on 
page 4-155.
58 Too Many Trays 
Attached1. Turn off and unplug the printer.
2. Remove options until the supported number of options for that model.
3. Plug in the printer, and turn it on.
If this does not fix the problem, replace the system board. See “System board removal” on 
page 4-155.
59 Incompatible Tray 
There is an incompatible tray. To remove the option:
1. Turn off and unplug the printer.
2. Remove all option trays.
3. Install one option, plug in the printer and turn it on. 
4. Continue adding one option at a time and checking whether the error occurs.
5. Install all options except the one identified as a problem.
- If no problem occurs, replace the option.
- If the same error occurs, replace the system board.
6. Plug in and power on
61 Defective Disk • Select Continue to clear the message and continue printing.
• Install a different hard disk before performing any operations that require a hard disk.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
62 Disk full • Select Continue to clear the message and continue processing.
• Any information not previously stored on the hard disk is deleted.
• Delete fonts, macros, and other data stored on the hard disk.
• Install a larger hard disk.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
63 Unformatted disk • Select Continue to clear the message and continue printing.
• Format the disk.
• If the error message remains, replace the hard disk.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
64 Unsupported disk 
format• Select Continue to clear the message and continue printing.
• Format the disk.
• If the error message remains, replace the hard disk.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
80 Fuser Near Life 
Warning• Select Continue to clear the message and continue printing.
•Show Me, View Supplies, and Tell Me More displays additional information.
• Order a replacement fuser. When print quality is reduced, install the new fuser using the 
instruction sheet that comes with the replacement fuser.
Note: Be sure to reset the fuser count. See “Reset Fuser Cnt” on page 3-28.
• If this does not fix the problem, replace the system board.See “System board removal” 
on page 4-155. Error code   Action  
						

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80 Fuser Life Warning • Select Continue to clear the message and continue printing.
•Show Me, View Supplies, and Tell Me More displays additional information.
• Order a replacement fuser. When print quality is reduced, install the new fuser using the 
instruction sheet that comes with the replacement fuser.
Note: Be sure to reset the fuser count. See “Reset Fuser Cnt” on page 3-28.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
80 Replace Fuser •Show Me, View Supplies, and Tell Me More displays additional information.
• Replace the fuser. See “Fuser removal” on page 4-110.
Note: Be sure to reset the fuser count. See “Reset Fuser Cnt” on page 3-28.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
80 Fuser Missing • Reinstall the fuser. See “Fuser removal” on page 4-110.
• Reseat connectors behind fuser. They may get dislodged and not make good contact 
when the fuser is installed.
• Check the cable connectors for damage at the system board and at the LVPS.
80.41 Fuser missing • Install the fuser. Replace the fuser if the problem persists.
• If the problem continues, turn the printer off and remove the rear frame cover. See “Rear 
frame cover removal” on page 4-47. Check the cable in connector JFUSER1 for proper 
connection to the system board, the cable for pinch points, and the cable or the connector 
for any other damage. If the connector is damaged on system board, replace the system 
board. See “System board removal” on page 4-155. If the fuser cable is damaged, 
replace the cable.
• Check for the following continuity between the DC autoconnect and FUSER1. 
• If continuity is not present, replace the fuser cable. If the problem persists after replacing 
cable, replace the system board. See “System board removal” on page 4-155.
82 Waste Toner 
Nearly Full• Select Continue to clear the message and continue printing.
• If printing continues, order a replacement waste toner box immediately.
• If the problem persists, open the front access door and check the aligner shaft for binding. 
Clear the binding if possible. If not possible, contact your next level of service.
82 Replace Waste 
Toner• Replace the waste toner box using the instruction sheet that comes with the replacement 
waste toner box.
• Ensure that there is no interference between the waste toner box and the printer. 
• If the problem persists, open the front access door and check the aligner shaft for binding. 
Clear the binding if possible. 
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
• If the problem persists, contact your next level of service. Error code   Action 
AC auto-
connectDC auto-
connect
Pin 1 Pin 3
Pin 5 Pin 4
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10 
						

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82 Waste Toner Missing • Insert the waste toner box.
• Inspect the top cover camshaft assembly for proper operation. When the top access 
cover is closed, the printer should mechanically interlock.
• Check the cable in connector JBUMP1on the system board for defects and proper 
connection. If the cable wiring or the cable connection is defective, replace the bump 
multipurpose feeder/duplex motor assembly. See “Multipurpose feeder (MPF)/duplex 
motor assembly removal” on page 4-125. If the cable in JBUMP1 connector is 
damaged on the system board, replace the system board. See “System board removal” 
on page 4-155.
• Check the aligner shaft and the mechanical system for binds.
• Replace the bump multipurpose feeder/duplex motor assembly. See “Multipurpose 
feeder (MPF)/duplex motor assembly removal” on page 4-125.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
82.41 If you continuously get this error, then the problem is the aligner motor error. Go to “147.xx, 
920.01—POST (power-on self test) aligner error service check” on page 2-57. 
83.xx Transfer Module 
Life Warning• Select Continue to clear the message and continue printing.
• Order a replacement transfer module. When print quality is reduced, install the new 
transfer module using the instruction sheet that comes with the replacement transfer 
module.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
83.xx Replace Transfer 
Module• Replace the transfer module using the instruction sheet that comes with the replacement 
transfer module. See “Transfer module removal” on page 4-171.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
83.41 Transfer Module 
MissingIf the you continuously get this error, go to “920.03, 920.25—Transfer Module Missing or 
not connected service check” on page 2-97.
84.11  PC Unit 
Life Warning• Select Ignore to clear the message and continue printing.
• Order the specified photoconductor unit. When print quality is reduced, install the new 
specified photoconductor unit using the instruction sheet that comes with the replacement 
specified photoconductor unit.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
84 Replace  PC 
Unit• Replace the specified photoconductor unit using the instruction sheet that comes with the 
replacement specified photoconductor unit. Navigate to Menu > Supplies menu > 
Replace supplies.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
Note: Make sure to reset the photoconductor unit counter(s). Error code   Action  
						

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84  PC Unit 
Missing• Scroll down the operator panel to see if the printer is showing that all four of the PC units 
are missing. If so, check the HVPS cable between the system board and the HVPS. 
Ensure that the cable is not plugged in backwards on the HVPS. Disconnect and 
reconnect the cable to make sure there is good contact.
• Insert or reinstall the specified photoconductor unit and see if problem clears. See 
“Photoconductor unit removal” on page 4-142.
• Swap the photoconductor unit between two locations and see if the problem moves with 
photoconductor unit. If problem follows the photoconductor unit, replace the 
photoconductor unit. See “Photoconductor unit removal” on page 4-142.
• Remove the top access cover assembly (see “Top access cover assembly removal” 
on page 4-54), and confirm that the camshaft follower (A) on the left side is not out of the 
groove (B). If the camshaft follower is out of the groove, raise the arm, use a screwdriver 
to ease the camshaft follower back into the groove. You need to press down to snap it 
into position. 
• Check the high voltage contacts path, especially the “finger” on the specified 
photoconductor unit (printer is shown with components removed for clarity).
• If the contacts are good, replace the HVPS. See “High-voltage power supply (HVPS) 
removal” on page 4-115.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
Note: Make sure to reset the photoconductor unit counter(s). Error code   Action 
A B
High voltage
contact pathHigh voltage
power supply
Finger 
						

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84  PC Unit Near 
Life Warning• Select Ignore to clear the message and continue printing.
• Order the specified photoconductor unit. When print quality is reduced, install the new 
specified photoconductor unit using the instruction sheet that comes with the replacement 
specified photoconductor unit.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
Note: Make sure to reset the photoconductor unit counter(s).
88.xx  Cartridge 
Low•Show Me, View Supplies, and Tell Me More displays additional information.
• Replace the specified toner cartridge.
• Select Continue to clear the message and continue printing.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
88.xx  Cartridge 
Nearly Low•Show Me, View Supplies, and Tell Me More displays additional information.
• Replace the specified toner cartridge.
• Select Continue to clear the message and continue printing.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155.
88.xx Replace  
Cartridge•Show Me, View Supplies, and Tell Me More displays additional information.
• Replace the specified toner cartridge.
• Select Continue to clear the message and continue printing.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-155. Error code   Action  
						

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Error codes and messages
Error code  Description  Action 
1xx service error codes
110.01–110.07Mirror 
Motor ErrorA mirror motor error has occurred. • POR the printer. 
• If the error message persists, go to “110.xx—
Mirror motor service check” on page 2-45.
111.01–111.02 
Printhead ErrorAn error has occurred in the cyan 
channel of the printhead.• POR the printer. 
• If the error message persists, go to “111.xx, 
112.xx, 113.xx, and 114.xx—Printhead error 
service check” on page 2-46.
112.01–112.02 
Printhead ErrorAn error has occurred in the magenta 
channel of the printhead.• POR the printer. 
• If the error message persists, go to “111.xx, 
112.xx, 113.xx, and 114.xx—Printhead error 
service check” on page 2-46.
113.01–113.02 
Printhead ErrorAn error has occurred in the yellow 
channel of the printhead.• POR the printer. 
• If the error message persists, go to “111.xx, 
112.xx, 113.xx, and 114.xx—Printhead error 
service check” on page 2-46.
114.01–114.02 
Printhead ErrorAn error has occurred in the black 
channel of the printhead.• POR the printer. 
• If the error message persists, go to “111.xx, 
112.xx, 113.xx, and 114.xx—Printhead error 
service check” on page 2-46.
120.00–120.21
Fuser ErrorAn error has occurred in the fuser. • Remove and reseat the fuser. See “Fuser 
removal” on page 4-110.
• POR the printer.
• If the error message persists, go to “120.xx—
Fuser error service check” on page 2-47.
140.01–140.10 
Autocomp Motor ErrorTray 1 motor has failed. • POR the printer.
• If the error message persists, go to “140.xx, 
920.02—Autocomp (tray 1) motor error 
service check” on page 2-49.
142.09—142.27
Motor ErrorFuser motor has failed. • POR the printer.
• If the error message persists, go to “142.xx, 
906.01–906.04—Motor (fuser) error service 
check” on page 2-49.
143.09–143.27 
Motor ErrorEP Drive assembly cartridge 1 (top) 
motor has failed.• POR the printer. 
• If the error message persists, go to “143.xx—
Motor (EP drive assembly top cartridge 1 
motor) error service check” on page 2-51.
144.09–144.27
Motor ErrorEP Drive assembly cartridge 2 
(middle) motor has failed.• POR the printer. 
• If the error message persists, go to “144.xx—
Motor (EP drive assembly middle cartridge) 
error service check” on page 2-52.
145.09–145.27 
Motor ErrorEP drive assembly cartridge 3 
(bottom) motor has failed.• POR the printer. 
• If the error message persists, go to “145.xx—
Motor (EP drive assembly bottom cartridge) 
error service check” on page 2-54. 
						

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146.01–146.08 
Motor ErrorDuplex motor has failed. • POR the printer. 
• If the error message persists, go to “146.xx, 
148.xx—Motor (MPF/duplex) error service 
check” on page 2-55.
147.09–147.25
Motor ErrorAligner motor has failed. • POR the printer. 
• If the error message persists, go to “147.xx, 
920.01—POST (power-on self test) aligner 
error service check” on page 2-57.
148.01–148.08
Motor ErrorThe multipurpose feeder motor has 
failed.• POR the printer.
• If the error message persists, go to “146.xx, 
148.xx—Motor (MPF/duplex) error service 
check” on page 2-55.
155.01, 155.03
Motor ErrorCam motor failed. • POR the printer.
• If the error message persists, go to “155.xx—
Cam motor error service check” on 
page 2-58.
156.01, 156.03
Motor ErrorCOD (Color On Demand) motor failed. • POR the printer.
• If the error message persists, go to “156.xx—
COD (Color On Demand) motor service 
check” on page 2-60.
160.01–160.06
Motor ErrorTray 2 pick motor failed. • POR the printer.
• If the error message persists, go to “160.xx, 
161.xx—Motor Error (option tray 2) service 
check” on page 2-60. 
161.01–161.06
Motor ErrorTray 2 feed motor failed. • POR the printer.
• If the error message persists, go to “160.xx, 
161.xx—Motor Error (option tray 2) service 
check” on page 2-60.
162.01–162.06
Motor ErrorTray 3 pick motor failed. • POR the printer.
• If the error message persists, go to “162.xx, 
163.xx—Motor Error (option tray 3) service 
check” on page 2-61.
163.01–163.06
Motor ErrorTray 3 feed motor failed. • POR the printer.
• If the error message persists, go to “162.xx, 
163.xx—Motor Error (option tray 3) service 
check” on page 2-61.
164.01–164.06
Motor ErrorTray 4 pick motor failed. • POR the printer.
• If the error message persists, go to “164.xx, 
165.xx—Motor Error (option tray 4) service 
check” on page 2-62.
165.01–165.06
Motor ErrorTray 4 feed motor failed. • POR the printer.
• If the error message persists, go to “164.xx, 
165.xx—Motor Error (option tray 4) service 
check” on page 2-62.
166.01–166.06
Motor ErrorTray 5 pick motor failed. • POR the printer.
• If the error message persists, go to “166.xx, 
167.xx—Motor Error (option tray 5) service 
check” on page 2-63.
167.01–167.06
Motor ErrorTray 5 feed motor failed. • POR the printer.
• If the error message persists, go to “166.xx, 
167.xx—Motor Error (option tray 5) service 
check” on page 2-63 Error code  Description  Action  
						

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168.xx
Motor ErrorHCIT elevator motor error. • POR the printer.
• If the error message persists, go to “168.xx—
Motor (HCIT elevator) error service check” 
on page 2-64. 
199.xx
Software ErrorUnrecoverable RIP software error. • POR the printer.
• If the error message persists with new code, 
replace the system board. See “System board 
removal” on page 4-155.
2xx paper jam messages
200.02 Input sensor is made when printer 
tries to print from an idle state.
Possible causes:
• Paper jam leaving page over 
sensor
• Defective input sensor
• Faulty system board• Clear away anything in the paper path that might 
cause the paper to jam.
• If clearing a paper jam does not fix the problem, 
go to “920.06—Input sensor service check” 
on page 2-99. 
200.04 Input sensor made late in the input 
sensor. 
Possible causes:
• Paper jam leaving page over 
sensor
• Defective input sensor
• Faulty system board• Clear away anything in the paper path that might 
cause the paper to jam.
• If clearing a paper jam does not fix the problem, 
go to “920.06—Input sensor service check” 
on page 2-99.
200.11 Input sensor does not break.
Possible causes:
• Incorrect media setting
• Incorrect paper loading
• Incorrect media restraint setting
• Transport belt module failure
• Lower guide failure
• Paper pick mechanism failure
• Input sensor failure1. Clear away anything in the paper path that might 
cause the paper to jam.
2. Ensure proper media is set for the type of paper 
used.
3. Fan media, and stack flat in the tray.
4. Properly set media restraints in the paper tray. 
5. Check the pick arm rolls (tires) and replace if 
worn.
If the problem persists, go to “200.11, 250.03—
Paper Jam error service check” on page 2-64. 
200.17 Input sensor is made when printer 
powers up or covers are closed.
Possible causes:
• Paper jam leaving page over 
sensor
• Defective input sensor
• Faulty system board• Clear away anything in the paper path that might 
cause the paper to jam.
• If clearing a paper jam does not fix the problem, 
go to “920.06—Input sensor service check” 
on page 2-99. 
200.21 Aligner motor stalled.
Possible causes:
• Waste toner not seated.
• Faulty cable/connector
• 24 V interlock switch not working 
correctly
• Faulty align motor
• Faulty system board• Check that the waste toner is latched correctly in 
the printer.
• Check for anything in the paper path that might 
cause the paper to jam. 
• If clearing a paper jam does not fix the problem, 
go to “147.xx, 920.01—POST (power-on self 
test) aligner error service check” on 
page 2-57. Error code  Description  Action  
						

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200.22 Pick (tray 1) motor stalled.
Possible causes:
• Faulty cable/connector
• Faulty pick motor
• Faulty system board• Check for anything in the paper path that might 
cause the paper to jam. 
• If clearing a paper jam does not fix the problem, 
go to “140.xx, 920.02—Autocomp (tray 1) 
motor error service check” on page 2-49.
200.25 Input sensor is made when tray 1 is 
installed.
Possible causes:
• Improper placement of paper in 
tray 1
• Damaged input sensor flag or 
input sensor
• Faulty system board• Fan media, and stack flat in the tray or 
multipurpose feeder.
• Properly set media restraints in the paper tray. 
• If clearing a paper jam does not fix the problem, 
go to “920.06—Input sensor service check” 
on page 2-99.
200.30 Paper hit input sensor too soon.
Possible causes:
• Incorrect paper loading
• Damaged input sensor flag or 
input sensor
• Faulty system board• Fan the media, and then stack flat in the tray.
• Check for anything in the paper path that might 
cause the paper to jam.
• The input sensor may not be functioning 
properly. Go to “920.06—Input sensor service 
check” on page 2-99.
201.02 Bubble sensor active when printing 
started. 
Possible causes:
• Paper jam leaving page over 
sensor
• Damaged bubble sensor
• Damaged fuser autoconnect
• Faulty fuser DC cable connection
• Faulty fuser
• Faulty system board1. Clear away anything in the paper path that might 
cause the paper to jam.
2. Ensure proper media is set for the type of paper 
used.
3. Fan media, and stack flat in the tray.
4. Properly set media restraints in the paper tray.
If the problem persists, go to ““Bubble sensor 
service check” on page 2-122.
201.06 Paper is jammed between the input 
sensor and the exit sensor.
Possible causes:
• Damaged paper exit sensor or 
paper exit sensor flag
• Transport belt module failure
• Aligner failure
• Damaged fuser autoconnect
• Faulty fuser DC cable connection
• Faulty fuser
• Faulty system board• Check for anything in the paper path that might 
cause the paper to jam. 
•Go to “201.06, 201.08, 201.31—Paper Jam 
error service check” on page 2-65.
201.07 Exit sensor is made early.
Possible causes:
• Damaged paper exit sensor or 
paper exit sensor flag
• Damaged fuser autoconnect
• Faulty fuser DC cable connection
• Faulty fuser
• Faulty system board
• Faulty input sensor flag• Check for anything in the paper path that might 
cause the paper to jam. 
• The fuser exit sensor may not be functioning 
properly. Go to “920.08—Exit sensor service 
check” on page 2-100.
• Check the input sensor flag. Error code  Description  Action