Brother DCP-9055CDN Service Manual page 170

■ Completely blank
<User Check>
Step
1 CIS unit failure
2 Second side scanning CIS
failure
3 Main PCB failure
■ Vertical streaks
Step
1 CIS unit failure
2 Second side scanning CIS
failure
■ White vertical streaks
<User Check>
Step
1 CIS unit failure
2 Second side scanning CIS
failure
- Check if the first side and second side of the document are reversed.
Cause
<User Check>
- Check if the ADF glass or document glass is not
stained.
- Clean the CIS glass of the ADF.
Cause
- Check if the ADF glass or document glass is not stained.
- Clean the CIS glass of the ADF.
Cause
2-132
Remedy
Replace the document scanner unit.
Replace the upper document chute ASSY.
Replace the main PCB ASSY.
Remedy
Replace the document scanner unit.
Replace the upper document chute ASSY.
Remedy
Replace the document scanner unit.
Replace the upper document chute ASSY.
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