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30 November, 1999
COPY QUALITY TROUBLESHOOTING
7.1.11 FAINT COPIES
H545T504.WMF
H545T512.WMF
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
7-11
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