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Confidential
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Color misregistration
User Check
- Implement the auto color registration by the panel operation.
- Replace the belt unit with a new one.
- Replace the drum unit with a new one.
- Replace the waste toner box with a new one.
Step Cause
Check Result Remedy
1
Phase shift of
gear 39/121
Check if gear 39/121
phase is shifted?
Yes Phase the Gear 39/121.
For the method how to
phase the gear 39/121,
refer to “Chapter 3
DISASSEMBLY AND
ASSEMBLY”.
2
Engine PCB
failure
Is the problem solved
after replacing the engine
PCB ASSY?
Yes Replace the engine PCB
ASSY.
Fogging
User Check
- Replace the toner cartridge with a new one.
- Replace the drum unit with a new one.
- Do not use acid paper.
- Check if there is dust or paper powder in the machine.
Step Cause
Check Result Remedy
1
Toner sensor
failure (Machine
body)
Is the toner sensor
performed normally by
following the procedure
described in
“Maintenance mode 32”
to check.
No Replace the toner
sensor PCB (TE/NEW)
of the appropriate color.
2
Transfer HVPS
PCB failure
Is the problem solved
after replacing the
transfer HVPS PCB
ASSY?
Yes Replace the Transfer
HVPS PCB ASSY.
3
Charge HVPS
PCB failure
Is the problem solved
after replacing the charge
HVPS PCB ASSY?
Yes Replace the charge
HVPS PCB ASSY.
4 Engine PCB
failure
Is the problem solved
after replacing the engine
PCB ASSY?
Yes Replace the engine PCB
ASSY.
Note:
This problem often occurs when the drum unit or toner cartridge is nearly at the end of life.