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4.12 Troubleshooting for Scanning Image Defect
4.12.1Defect examples
Light
(2-108)
Vertical streaks
(2-111)
4.12.2Troubleshooting according to image defect
Light
Step
Incorrect white level
1
correction data
First or second side CIS unit
2
failure
3
Main PCB failure
Faulty registration
(2-109)
White streaks
(2-111)
Fig. 2-24
<User Check>
• Check that the contrast setting is not too light.
• Clean the scanner glass or first side/second side scanner glass strip.
• Clean the document hold.
Cause
Dark
Completely blank
(2-109)
(2-110)
Partially shaded
(2-112)
Remedy
Execute "Acquire white level data (Function
code 55)".
Replace the first or second side CIS unit.
Replace the main PCB ASSY.
All black
(2-110)
Fully tinged
(2-112)
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