Scanning Image Defect Troubleshooting; Image Defect Examples; Troubleshooting Image Defect - Brother MFC-9130CW Service Manual

4.12 Scanning Image Defect Troubleshooting

4.12.1 Image defect examples

Light on the page
(2-116)
Completely blank
(2-118)

4.12.2 Troubleshooting image defect

■ Light on the page
Step
1
2
3
Faulty registration
(2-117)
Vertical streaks
(2-118)
<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.
Cause
White level calibration data
failure
First side or second side CIS
unit failure
Main PCB failure
Dark
(2-117)
White vertical streaks
(2-118)
Fig. 2-15
Perform the acquisition of white level data.
(Function code
Replace the first side or second side CIS
unit.
Replace the main PCB ASSY.
2-116
All black
(2-119)
Remedy
55)
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