Image Reading Section: Uneven Image Density - Konica Minolta Di1611 Service Manual

Di1611/Di2011 FIELD SERVICE Ver.1.0 Mar. 2004
4.4.8

Image Reading Section: Uneven image density

Step
1 Original Glass is dirty, scratchy, worn, or damaged.
2 Shading sheet reading portion (the portion on the
backside of the Original Glass to which Original
Width Scale is affixed) is dirty.
3 Scanner mirrors are dirty, scratchy, or damaged.
4 Exposure Lamp (LA2) is dirty.
5 CCD Unit lens and CCD surface are dirty or
scratchy.
<Check Procedure>
Remove lens cover to check for possible contami-
nation.
6 Exposure Lamp is abnormally lit (flickers or abnor-
mally dark) when the Power Switch is turned ON.
7 Inverter Board (PU2) connector CN1PU2 is loose.
8 CCD Board (PWB-J) connector is loose.
9 Control Board (PWB-C/C) connector is loose.
<Typical Faulty Images>
Check
3-49
TROUBLESHOOTING
4011T525AA
Result Action
YES • Clean or change.
YES • Clean.
YES • Clean or change.
YES • Clean or change.
YES • Clean or change.
NO • Go to step 8.
YES • Reconnect.
NO • Change Exposure
Lamp (LA2).
YES • Reconnect.
YES • Reconnect.
NO • Change CCD Unit.
• Change Control
Board (PWB-C/C).