White Horizontal Stripes On One Color Image; Faint Print - Brother DCP-9055CDN Service Manual

■ White horizontal stripes on one color image

<User Check>
- The problem may disappear by itself. Try printing multiple pages to clear this problem
especially if the machine has not been used for a long time.
- Replace the toner cartridge with a new one.
- The drum unit may be damaged. Replace the drum unit with a new one.
Step
1 High-voltage power supply
PCB failure
2 Engine PCB failure

■ Faint print

Step
1 Laser unit failure
2 Toner/New sensor PCB
failure
Cause
Replace the high-voltage power supply PCB
ASSY.
Replace the engine PCB ASSY.
<User Check>
- Open and close the front cover and make print again.
- Check that the machine is installed on a level surface.
- Wipe the scanner windows of the laser unit with a soft,
lint-free cloth. (Refer to
- Replace the toner cartridge with a new one.
- Replace the drum unit with a new one.
Cause
Replace the laser unit.
Replace the Toner/New sensor PCB ASSY.
2-119
Remedy
Fig. 2-16 (P2-111))
Remedy
Confidential