Scanning Image Defect Troubleshooting; Image Defect Examples; Troubleshooting Image Defect - Brother DCP-8070D Service Manual

12. SCANNING IMAGE DEFECT
TROUBLESHOOTING

12.1 Image Defect Examples

12.2 Troubleshooting Image Defect

Image defect related problems are end user recoverable if following the User Check items. If
the same problem occurs, follow each procedure in the order of the number described in the
Step column in the tables below.
■ Light on the page
Step
White level data
malfunction
1
Scanner module
failure
2
Main PCB failure Is the problem solved by
3
Light
Completely blank
<User Check>
- Check whether the setting of the contrast does not become light.
- Clean the document glass.
Cause
Is the problem solved by
performing the
acquisition of white level
data. (Function code 55)
Is the problem solved by
replacing the CCD unit
(CCD model) or
document scanner unit.
(CIS model)
replacing the main PCB.
Faulty registration
Vertical streaks
Fig. 3-11
Check Result
Yes
Yes
Yes
3-81
Dark
White vertical
streaks
Remedy
Perform the acquisition of
white level data. (Function
code 55)
Replace the CCD module.
(CCD model)
Replace the document
scanner unit. (CIS model)
Replace the main PCB.
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