Lexmark X925 7541-03 series, Service Manual

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Diagnostic information
2-25
7541-03x
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Paper has stopped at the registration roller or has not reached the fuser (Paper jams
200, 250, 24
x ).
Paper has exited the registration roller and entered the fuser (Paper jam 201).
Paper has entered the fuser and exited the printer (Paper jam 203).
FRU Action
1 • Registration roller
clutch
• Registration roller
• Transfer belt unit
• Rear paper feed guide
Check these parts for wear or damage. Replace as necessary. Be
sure all guide surfaces in the paper path are free of dirt.
Check the registration roller clutch for continuity. Does the clutch
engage when the printer is printing a job?
Be sure connector CN20 on the printhead controller board is
connected properly. If the connection is properly connected, check
pin 1 on CN20 for +24Vdc and pin 3 for GND. If the voltage and
ground are present, replace the clutch. If replacing the clutch
doesn’t fix the problem, replace the printhead controller board.
2
• Registration sensor
• Printer controller board Check the registration sensor connection on CN12 on the engine
controller board for proper connection. If it is properly connected,
replace the registration sensor. If this doesn’t fix the problem,
replace the engine board.
FRU Action
1 • Transfer belt unit
• Rear paper guide
• Discharge brush
• Fuser Remove any buildup of toner. Replace any damaged or worn parts.
Check the paper exit flag on the fuser for damage. Replace the
fuser if necessary.
2 • Fuser entry sensor Check the fuser entry sensor to ensure it is in it’s position and not
dislodged.
Check the cable to ensure it is properly connected to CN6 on the
printhead controller board.
Replace the sensor if it is faulty. If this doesn’t fix the problem,
replace the printhead controller board.
3
Fuser separation pawl Replace the fuser if paper jams cannot be removed.
FRU Action
1 Fuser Remove any toner buildup, and replace any worn or damaged
parts.
2 • Output bin full lever
• Paper exit unit
• Exit unit sensor
• Bin full sensor Check the output bin full lever for smooth operation. Replace if
needed.
Check the exit unit sensor actuator for smooth operation. If the
actuator is broken, replace the paper exit unit.
Check the exit unit, and bin fill sensors on the paper exit unit for dirt
and debris. Clean if needed. Check the cable for proper connection
to CN7 on the printhead controller board. If the cable is properly
connected, replace the sensor faulty sensor. If this doesn't fix the
problem, replace the printhead controller board.