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November 29, 1999
COPY QUALITY TROUBLESHOOTING
7.1.7 VERTICAL WHITE LINES
H306T508.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)
• The laser optic components are dirty.
• The hot roller stripper scrapes off toner from the print paper.
• Damaged cleaning blade.
Action:
• Clean the laser optic components.
• Check the hot roller stripper mechanism. Clean the strippers and replace them if
they are damaged.
• Replace the cartridge.
7-7
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