Scanning Image Defect Troubleshooting; Image Defect Examples; Troubleshooting According To Scanning Image Defect - Brother FAX-2840 Service Manual

3.9

Scanning Image Defect Troubleshooting

3.9.1 Image defect examples

Light (2-78)
Completely blank

3.9.2 Troubleshooting according to scanning image defect

Light
Step
Incorrect white level data
1
2 CIS unit failure
3 Main PCB failure
Faulty registration (2-79)
Vertical streaks (2-80)
(2-80)
<User Check>
- Check that the setting of the contrast does not become light.
- Clean the CIS glass.
Cause
Dark or bluish white
White vertical
streak (2-80)
Fig. 2-13
Perform the acquisition of white level data.
(Function code
Replace the CIS unit.
Replace the main PCB ASSY.
2-78
(2-79)
Remedy
55)
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