2-90
Confidential
■ Faulty registration
■ Dark
<User Check>
- Check whether appropriate paper type is selected on the
driver.
Step Cause Remedy
1 Registration rear actuator
catching on some position
Re-assemble the registration rear actuator.
2 LED ASSY failure Replace the LED ASSY.
3 Main PCB failure Replace the main PCB ASSY.
<User Check>
- 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.
Step Cause Remedy
1 Dirt on the GRID electrodes of
the main body or drum unit
Clean the GRID electrodes of the main body
or drum unit. (Refer to fig. 2-7 (P2-50) and
fig. 2-8 (P2-51))
2 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
3 LED ASSY of corresponding
color failure
Replace the LED ASSY of corresponding
color.
4 Registration mark sensor
failure
Replace the registration mark L PCB ASSY.
5 Main PCB failure Replace the main PCB ASSY.
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Print Specifications
Paper Handling
