Horizontal Stripes; White Vertical Streaks On One Color Image - Brother 09055CDN Service Manual

■ Horizontal stripes

<User Check>
Step
1 Dirt on charged electrode
2 Bend of tray ground spring
(Refer to
3 Scratch on the heat roller
4 High-voltage power supply
PCB failure

■ White vertical streaks on one color image

<User Check>
- Check if there is no dust in the gap between the toner cartridge and drum frame.
- Wipe the scanner windows of the laser unit with a soft, lint-free cloth.
(Refer to Fig. 2-16
- Refer to the User's guide and remove the dirt on the exposure drum using a cotton swab.
- Replace the toner cartridge with a new one.
- Check the machine's environment. High temperature and high humidity or low temperature
and low humidity conditions can cause this problem.
- Damp (wet) paper might be used. Try to change to freshly unpacked paper.
- Replace the drum unit with a new one.
Step
1 Condensation
2 Exposure drum dirty
3 Laser unit failure
- Clean the inside of the machine and the corona wire in the drum unit.
- This symptom might stop occurring after making several prints.
If the symptom continues, replace the toner cartridge with a new one.
- Replace the drum unit with a new one.
Cause
Fig. 2-17 (P2-118))
(P2-112))
Cause
2-119
Remedy
Clean the electrodes of the drum unit and
main body. (Refer to Fig. 2-10 (P2-62)
Fig. 2-13 (P2-63))
Replace the paper tray.
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Remedy
Try to print several pages or leave the
machine 2 hours to allow it to reach room
temperature.
Refer to "2.5 Drum Cleaning" in Chapter 5
and perform drum cleaning.
Replace the laser unit.
and
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