TROUBLESHOOTINGJuly 30th, 1996
COPY QUALITY TROUBLESHOOTING
7.1.3. Dirty or Dark Background
Possible Cause (Scanner)
?Scanner shading correction error or wrong threshold.
Action:
1. Do the image sensor initialization with service function 10 (Shading Test).
(Refer to section 4-1.)
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 DTM.
2. Check if the hot roller surface is dirty or not.
?If it is, clean the roller
?If not, go to step 3.
3. Check if all the charge bias terminals on the DTM are properly connected.
?If they are, check or replace the high voltage power supply.
?If not, fix the connections.
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