Brother 09055CDN, Service Manual

Page: 170 / 590

2-131
Confidential
3.10 Scanning Image Defect Troubleshooting
3.10.1 Image defect examples
Fig. 2-20
3.10.2 Troubleshooting image defect
■
Light on the page (Error code BB, BC, etc)
<User Check>
- Check whether the setting of the contrast does not become light.
- Clean the document table glass or ADF glass.
- Clean the CIS glass of the ADF.
Step Cause Remedy
1 White level data failure Perform the acquisition of white level data.
(
Function code 55 )
2 Document scanner unit
(First side) failure Replace the document scanner unit (First
side).
3 Second side scanning CIS
failure Replace the second side scanning CIS.
4 Main PCB failure Replace the main PCB ASSY.
Light (2-131)
Faulty registration (2-132)
Dark (2-132)
Completely White vertical
Vertical streaks (2-133)
blank (2-133) streaks (2-133)