6.1.3. Dirty Background
Possible Cause (Scanner)
•
Scanner shading correction error or wrong threshold.
Action:
1. Clean the shading plate.
2. Adjust the scanner contrast threshold settings.
Possible Cause (Printer)
•
Poor drum sensitivity.
•
The charge is not properly applied.
•
The hot roller is dirty.
Action:
1. Try replacing the drum.
2. Check if the hot roller surface is dirty or not.
•
If it is, clean the roller or replace the cleaning pad.
•
If not, go to step 3.
3. Check if all the charge bias terminals on the development unit and the
CTM, and the charge wire are properly connected or not.
•
If they are, check or replace the power pack.
•
If not, fix the connections.
H515t612.wmf
H515t607.wmf
TROUBLESHOOTING
December 21st, 1995
COPY QUALITY TROUBLESHOOTING
6-4
