Horizontal Lines - Brother DCP-9055CDN Service Manual

■ Downward fogging of solid color
<User Check>
Step
1 High-voltage power supply
PCB failure
2 Engine PCB failure
3 Main PCB failure

■ Horizontal lines

Step
1 Dirt on charged electrode
2 Paper tray ground terminal
provided in machine body
3 Toner attached on the
exposure drum
4 Scratch on the heat roller
5 High-voltage power supply
PCB failure
■ Ghost
<User Check>
Step
1 Erase lamp lens dirty
2 High-voltage power supply
PCB failure
3 Engine PCB failure
4 Main PCB failure
- Toner may be empty. Replace the toner cartridge with a new one.
Cause
<User Check>
- The paper tray ground terminal provided in the
machine body may be dirty. Clean the contact with a
dry cloth.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Cause
- Check the machine's environment, conditions such as high humidity
may cause this situation to occur.
- Check that the appropriate media type is selected in the printer driver.
- Make a print in the color mode.
- Replace the drum unit with a new one.
Cause
2-122
Remedy
Replace the high-voltage power supply PCB
ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Remedy
Clean the electrodes of the drum unit and
main body. (Refer to Fig. 2-10 (P2-62)
Fig. 2-13 (P2-63))
Correct bending of paper tray ground
terminal.
This symptom might disappear after making
approximate 10 prints.
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Remedy
Clean the erase lamp lens. (Refer to
Fig. 2-10 (P2-62) and Fig. 2-13
Replace the high-voltage power supply PCB
ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
and
(P2-63))
Confidential