Faulty Registration - Brother MFC-9130CW Service Manual

■ Faulty registration

Step
1 Registration rear actuator
catching on some position
2 LED ASSY failure
3 Main PCB failure
■ Dark
<User Check>
Step
1 Dirt on the GRID electrodes of
the main body or drum unit
2 High-voltage power supply
PCB failure
3 LED ASSY of corresponding
color failure
4 Registration mark sensor
failure
5 Main PCB failure
<User Check>
- Check whether appropriate paper type is selected on the
driver.
Cause
- 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.
- Check if a used toner cartridge is set after new toner detection.
- Adjust density with the density adjustment function.
- Replace the drum unit or toner cartridge with a new one.
- Replace the belt unit with a new one.
Cause
2-90
Remedy
Re-assemble the registration rear actuator.
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))
Replace the high-voltage power supply PCB
ASSY.
Replace the LED ASSY of corresponding
color.
Replace the registration mark L PCB ASSY.
Replace the main PCB ASSY.
fig. 2-7 (P2-50) and
Confidential