One Color Band - Brother DCP-9010CN Service Manual

■ One color band

<User Check>
- Clean the inside of the machine and the corona wire in the drum unit. If the same problem
occurs after cleaning, replace the drum unit with a new one.
- The paper tray ground terminal provided in the machine body may be dirty. Clean the
contact with a dry cloth.
■ Downward fogging of solid color
<User Check>
Step Cause
1 HVPS control PCB
failure
2 High-voltage power
supply PCB failure
3 Engine PCB failure
4 Main PCB failure
- Toner may be empty. Replace the toner cartridge with a new one.
Is the problem solved
after replacing the HVPS
control PCB ASSY?
Is the problem solved
after replacing the
high-voltage power
supply PCB ASSY?
Is the problem solved
after replacing the
engine PCB ASSY?
Is the problem solved
after replacing the
main PCB ASSY?
3-80
Check
Result
Yes
Yes
Yes
Yes
Remedy
Replace the HVPS
control PCB ASSY.
Replace the
high-voltage power
supply PCB ASSY.
Replace the engine
PCB ASSY.
Replace the main PCB
ASSY.
Confidential