One Color Spots Or Dirt; One Color Band - Brother 09055CDN Service Manual

■ One color spots or dirt

<User Check>
- Damp (wet) paper might be used. Try to changing to freshly unopened paper.
- Toner may be empty. Replace the toner cartridge with a new one.
- Refer to the User's guide and remove the dirt on the exposure drum using a cotton swab.
- The drum unit may be damaged. Replace the drum unit with a new one.
- The belt unit may be damaged. Replace the belt unit with a new one.
Step
1 Dirt on the pinch roller of the
paper tray
2 Exposure drum dirty
3 Fuser unit failure
4 High-voltage power supply
PCB failure
5 Toner/New sensor PCB
failure

■ One color band

<User Check>
- Clean the inside of the machine and the corona wire in the drum unit. If the same problem
occurs after cleaning, replace the drum unit with a new one.
- Refer to the User's guide and remove the dirt on the exposure drum using a cotton swab.
- The paper tray ground terminal provided in the machine body may be dirty. Clean the
contact with a dry cloth.
Step
1 Exposure drum dirty
Cause
Refer to
pinch roller.
Refer to
and perform drum cleaning.
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Replace the Toner/New sensor PCB ASSY.
Cause
Refer to
and perform drum cleaning.
2-122
Remedy
Fig. 2-18 (P2-121) and clean the
"2.5 Drum Cleaning" in Chapter 5
Remedy
"2.5 Drum Cleaning" in Chapter 5
Confidential