6.1.9. Black Dots/Spots
Possible Cause (Scanner)
• Dust on the exposure glass.
• Scanner shading correction error or wrong threshold.
• The FCU is defective.
Action:
1. Clean the exposure glass of the image sensor.
2. Adjust the scanner contrast threshold settings using Function 10-2.
(See section 4.1.15.)
3. Replace the FCU.
H516T502.wmf
August 7th, 1995 TROUBLESHOOTING
COPY QUALITY TROUBLESHOOTING
6-9
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