Table of Contents
Advertisement
TROUBLESHOOTING
COPY QUALITY TROUBLESHOOTING
7.1.3. Dirty Background
Possible Cause (Scanner)
•
Scanner shading correction error or wrong threshold.
Action:
1. Clean the shading plate (for both book and ADF).
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.
h523t502.wmf
7-4
June 10th, 1997
h523t503.wmf
Advertisement
Chapters
Table of Contents
