21 May, 1999
COPY QUALITY TROUBLESHOOTING
7-3
Trouble-
shooting
7.1.3 DIRTY BACKGROUND
Possible Cause (Scanner)
·
Scanner shading correction error or incorrect threshold.
Action:
1. Clean the shading white roller.
2. Adjust the scanner contrast threshold settings.
Possible Cause (Printer)
·
Poor drum sensitivity.
·
The charge is improperly applied.
·
The hot roller is dirty.
Action:
1. Try replacing the cartridge.
2. Check to see if the hot roller surface is dirty.
·
If it is, clean the roller or replace the cleaning pad.
·
If not, go to step 3.
3. Check whether all connections between the charge bias terminals and the
cartridge are correct.
·
If they are, check or replace the power pack.
·
If they are not, fix the connections.
H547T502.WMF
H547T503.WMF
