Confidential
2-85
4.8 Scanned-image Problems
4.8.1 Defective images
Fig. 2-12
4.8.2 Troubleshooting from image defect
Light
Light Scanning position failure Dark
Completely blank Vertical streaks White vertical
streaks
Colored over the whole page Entire image is
distorted
User Check
- Check if the contrast is set to "Light."
- Clean document cover glass or ADF glass.
- Clean the document pressure bar.
Step Cause Solution
1 White/black level correction
data failure
Carry out maintenance 55.
2 First side or second side CIS
unit defective
Replace the first side or second side CIS unit.
3 Main PCB defective Replace the main PCB ASSY.
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