Konica Minolta bizhub 20 Service Manual page 158

■ Completely blank
Step Cause
White level data
malfunction
1
Scanner module
2
failure
Main PCB failure Is the problem solved by
3
■ Vertical streaks
Step Cause
Scanner module
1
failure
ADF or
2 document glass
failure
Check
Is the problem solved by
performing the
acquisition of white level
data. (Function code 55)
Is the problem solved by
replacing the CCD unit.
replacing the main PCB.
<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.
3-83
Result Remedy
Perform the acquisition of
white level data. (Function
Yes
code 55)
Replace the CCD module.
Yes
Replace the main PCB.
Yes
Result Remedy
Replace the CCD module.
Yes
Replace the top cover
Yes ASSY.
Confidential