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

Check if gear 39/121

Yes

Phase the Gear 39/121.

 

gear 39/121

phase is shifted?

 

For the method how to

 

 

 

 

phase the gear 39/121,

 

 

 

 

refer to “Chapter 3

 

 

 

 

DISASSEMBLY AND

 

 

 

 

ASSEMBLY”.

 

 

 

 

 

2

Engine PCB

Is the problem solved

Yes

Replace the engine PCB

 

failure

after replacing the engine

 

ASSY.

 

 

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

Is the toner sensor

No

Replace the toner

 

failure (Machine

performed normally by

 

sensor PCB (TE/NEW)

 

body)

following the procedure

 

of the appropriate color.

 

 

described in

 

 

 

 

“Maintenance mode 32”

 

 

 

 

to check.

 

 

 

 

 

 

 

2

Transfer HVPS

Is the problem solved

Yes

Replace the Transfer

 

PCB failure

after replacing the

 

HVPS PCB ASSY.

 

 

transfer HVPS PCB

 

 

 

 

ASSY?

 

 

 

 

 

 

 

3

Charge HVPS

Is the problem solved

Yes

Replace the charge

 

PCB failure

after replacing the charge

 

HVPS PCB ASSY.

 

 

HVPS PCB ASSY?

 

 

 

 

 

 

 

4

Engine PCB

Is the problem solved

Yes

Replace the engine PCB

 

failure

after replacing the engine

 

ASSY.

 

 

PCB ASSY?

 

 

 

 

 

 

 

Note:

This problem often occurs when the drum unit or toner cartridge is nearly at the end of life.

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