6.1.11. Faint Copies
Possible Causes (Scanner)
•
Dirty shading plate and/or exposure glass
•
Wrong scan threshold
•
Contact image sensor (LED, sensor element) defect
Action:
•
Clean the white plate on 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
•
Defective quenching lamp
•
Low toner
•
Low fusing temperature
H516T512.wmf
H516T504.wmf
TROUBLESHOOTING
August 2nd, 1995
COPY QUALITY TROUBLESHOOTING
6-12