Konica Minolta bizhub 20 Service Manual page 159

■ White vertical streaks
Step Cause
Scanner module
1
failure
ADF or
2 document glass
failure
<User Check>
- Check if the ADF glass or document glass is not stained.
Check
Is the problem solved by
replacing the CCD unit.
Is the problem solved by
replacing the scanner
top cover ASSY.
3-84
Result Remedy
Replace the CCD module.
Yes
Replace the top cover
Yes ASSY.
Confidential