Defect Examples - Brother DCP-8110DN Service Manual

4.12 Troubleshooting for Image Defects

4.12.1 Defect examples

4.12.2 Troubleshooting according to image defect
Light
Step
1 Incorrect white level correction data Execute function code 55.
First side CIS unit or second side
2
CIS unit failure
3 Main PCB failure
Light
Completely blank
<User Check>
- Check that the contrast setting is not too light.
- Clean the document glass or the ADF glass.
- Clean the first side document hold or second side document hold.
Cause
Faulty registration
Vertical streaks
Fig. 2-15
Replace the first side CIS unit or second
side CIS unit.
Replace the main PCB ASSY.
2-93
Dark or
bluish white
Vertical streaks
Remedy
Confidential