Poor Fixing - Brother MFC-9130CW Service Manual

■ Poor fixing

<User Check>
Step
1 Fuser unit failure
2 High-voltage power supply
PCB failure
3 Low-voltage power supply
PCB failure
4 LED ASSY failure
5 Main PCB failure
■ Completely blank
<User Check>
Step
1 Dirt on the GRID electrodes of
the main body or drum unit
2 LED flat cable connection
failure
3 LED ASSY installation failure
4 LED flat cable failure
5 LED ASSY failure
6 LED control PCB failure
7 High-voltage power supply
PCB failure
8 Main PCB failure
- Check the machine's environment. High temperature and high
humidity or low temperature and low humidity conditions can cause this
problem.
- Clean the corona wire of each drum unit for all four colors.
- Replace the drum unit or toner cartridge with a new one.
- Replace the belt unit with a new one.
- Clean the surface of the LED ASSY.
Cause
- Clean the corona wire of each drum unit for all four colors.
- Replace the drum unit or toner cartridge with a new one.
- Install the latest firmware.
Cause
2-91
Remedy
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the LED ASSY.
Replace the main PCB ASSY.
Remedy
Clean the GRID electrodes of the main body
or drum unit. (Refer to
fig. 2-8 (P2-51))
Check the LED flat cable connection and
reconnect it.
Re-assemble the LED ASSY.
Replace the LED flat cable.
Replace the LED ASSY.
Replace the LED control PCB ASSY.
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
fig. 2-7 (P2-50) and
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