Brother MFC-9125CN - One Color Band

3-80
Confidential
■ 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>
- Toner may be empty. Replace the toner cartridge with a new one.
Step Cause Check
Result
Remedy
1 HVPS control PCB
failure
Is the problem solved
after replacing the HVPS
control PCB ASSY?
Yes Replace the HVPS
control PCB ASSY.
2 High-voltage power
supply PCB failure
Is the problem solved
after replacing the
high-voltage power
supply PCB ASSY?
Yes Replace the
high-voltage power
supply PCB ASSY.
3 Engine PCB failure Is the problem solved
after replacing the
engine PCB ASSY?
Yes Replace the engine
PCB ASSY.
4 Main PCB failure Is the problem solved
after replacing the
main PCB ASSY?
Yes Replace the main PCB
ASSY.