Troubleshooting For Image Defects; Defect Examples; Troubleshooting According To Image Defect - Brother DCP-7080 Service Manual

4.12 Troubleshooting for Image Defects

4.12.1 Defect examples

Light (2-89)
Vertical streaks (2-92)

4.12.2 Troubleshooting according to image defect

 Light
Step
Incorrect white level correction data Execute "Acquire white level data
1
First or second side CIS unit failure Replace the first or second side CIS unit.
2
Main PCB failure
3
Faulty registration (2-90)
White streaks
(2-92)
<User Check>
- Check that the contrast setting is not too light.
- Clean the scanner glass or ADF glass.
- Clean the document hold.
Cause
Dark (2-90)
Partially shaded
(2-93)
Fig. 2-14
code: 55)".
Replace the main PCB ASSY.
2-89
Completely All black
blank (2-91) (2-91)
Fully tinged (2-93)
Remedy
(function
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