30 November, 1999 COPY QUALITY TROUBLESHOOTING
7-11
Trouble-
shooting
7.1.11 FAINT COPIES
Possible Causes (Scanner)
•
Dirty shading plate and/or exposure glass
•
Incorrect scan threshold
•
Contact image sensor (LED, sensor element) defect
Action:
•
Clean the white roller in the ADF.
•
Adjust the scan threshold settings.
•
Replace the image sensor.
Possible Causes (Printer)
•
Poor drum sensitivity.
•
Dirty laser optic components.
•
Incorrect development/ transfer bias
•
Low toner
•
Low fusing temperature
H545T512.WMF
H545T504.WMF
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