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August 7th, 1995
6.1.5. Vertical Black Lines
Possible Cause (Scanner)
•
Defective contact image sensor element(s).
•
Dirt or dust on the exposure glass.
Action:
1. Clean the exposure glass.
2. Replace the contact image sensor.
Possible Cause (Printer)
•
The thermal head is defective.
•
The paper in the machine is scratched.
Action:
1. Replace the thermal head.
2. Check the paper path if paper is damaged.
COPY QUALITY TROUBLESHOOTING
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6-5
TROUBLESHOOTING
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