Troubleshooting According To Image Defect; Light - Brother HL-1110 Service Manual

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4.2

Troubleshooting According to Image Defect

End users can solve problems related to image defects as long as they follow the User
Check items. If the problem still cannot be solved, implement each procedure according to
the step numbers in the tables below.

4.2.1 Light

Step
Dirt on electrodes of the drum unit
1
and those of the machine
Toner type determination failure
2
when a new toner cartridge is
detected
3
Fuser unit failure
High voltage power supply PCB
4
failure
5
Laser unit failure
6
Main PCB failure
Electrodes location of the toner cartridge and drum unit
Electrodes location of the machine
<User Check>
- Check the usage environment of the machine. Using the machine in
hot-humid or cold-dry conditions can cause this problem.
- If the whole page is light, toner save mode may be ON. Turn OFF
the toner save mode.
- Adjust the density using the Density Adjustment.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Cause
Fig. 1-6
Fig. 1-7
1-19
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig.
1-7.)
Reset the toner manually. (Refer to
RESETTING TONER MANUALLY" in
Chapter
4.)
Replace the fuser unit.
Replace the high voltage power supply PCB
ASSY.
Replace the laser unit.
Replace the main PCB ASSY.
Fig. 1-6
or
"6.
Confidential

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