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November 29, 1999
COPY QUALITY TROUBLESHOOTING
7.1.5 VERTICAL BLACK LINES
H306T505.WMF
H306T503.WMF
Possible Cause (Scanner)
• Dirt or dust on the exposure glass and/or optical mirror(s).
• Dirty white plate in the ADF.
• Defective SBU.
Action:
1. Clean the exposure glass and the shading white plate.
2. Clean the optical mirrors in the optical unit.
3. Replace the optical unit or SBU.
Possible Cause (Printer)
• Damaged cleaning blade.
• Dirty hot roller stripper(s).
Action:
1. Replace the cartridge.
2. Clean the hot roller strippers.
7-5
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