Service manual

2-64
Confidential
 White spots
Fig. 2-10
<User Check>
- Check that the fan is not clogged.
- Refer to the User's Guide to remove the dirt from the exposure drum
using a cotton applicator.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step Cause Remedy
1
Accumulated paper dust Refer to the figure below to clean the paper
dust cleaning roller.
2
Clogged filter Clean the filter.
3
Scratch or dirt on the fuser unit Replace the fuser unit.
4
High-voltage power supply PCB
failure
Replace the high-voltage power supply PCB
ASSY.
Paper dust
cleaning roller
Paper tray