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TROUBLESHOOTING COPY QUALITY TROUBLESHOOTING
May 29th, 1995
6.1.3. Dirty Background
H516T507.wmf
H516T512.wmf
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.
