White Spots On One Color Image - Brother MFC-9130CW Service Manual

■ White spots on one color image

<User Check>
- Check if the main fan is not blocked.
- Refer to the User's guide and remove the dirt on the exposure drum using a cotton swab.
- Replace the drum unit or toner cartridge with a new one.
Step
1 Dirt in the paper dust cleaning
roller
2 Scratch and dirt on fuser unit
3 High-voltage power supply
PCB failure
4 Main PCB failure
Paper dust
Cause
Referring to the figure below, remove paper
dust attached on the paper dust cleaning
roller.
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Fig. 2-14
2-97
Remedy
Paper dust cleaning roller
Confidential