Brother DCP-9055CDN Service Manual page 169

■ Faulty registration (Error code B3, B4, BE, BF, etc)
- ADF
Step
1 Fine adjustment of scan start
position misalignment
2 Document first side rear
actuator catching on some
position
3 Document second side rear
actuator catching on some
position
4 Fine adjustment of print start
position misalignment
- Document table
Step
1 Fine adjustment of scan start
position misalignment
2 Document scanner unit failure
■ Dark (Error code BB, BC, etc)
<User Check>
Step
1 Coming off of the shading film
in the ADF unit
2 White level data malfunction
3 CIS unit failure
4 Second side scanning CIS
failure
5 Main PCB failure
Cause
Cause
- Check whether the setting of the contrast does not become dark.
Cause
2-131
Remedy
Perform the fine adjustment of scan start
position. (Function code
Correct catching of the document first side
rear actuator.
Correct catching of the document second
side rear actuator.
Perform the fine adjustment of print start
position. (Function code
(Adjustment upon second side print only.)
Remedy
Perform the fine adjustment of scan start
position. (Function code
Replace the document scanner unit.
Remedy
Re-assemble the shading film in the ADF
unit.
Perform the acquisition of white level data.
(Function code 55)
Replace the document scanner unit.
Replace the upper document chute ASSY.
Replace the main PCB ASSY.
54)
45)
54)
Confidential