Scanner Section: Uneven Image Density - Konica Minolta bizhub 164 Service Manual

Field Service Ver. 2.0 Jun. 2010
16.2.8

Scanner section: Uneven image density

A. Typical faulty images
B. Troubleshooting procedure
Step
1 Original glass is dirty, scratchy, worn, or damaged.
2 Shading sheet reading portion (the portion on the back-
side of the original glass to which original width scale is
affixed) is dirty.
3 Exposure lamp is abnormally lit (flickers or abnormally
dark) when the power switch is turned ON.
4 CIS module components (glass, lamp, sensor) are dirty,
scratchy, worn, or damaged.
5 CIS module (CIS) connector is loose.
6 Printer control board (PRCB) connector P102 is loose.
Check
16. IMAGE QUALITY PROBLEM
A09AF3C529DA
Result Action
YES • Clean or change.
YES • Clean.
NO • Go to step 5.
YES • Clean or change.
YES • Reconnect.
YES • Reconnect.
NO • Change PRCB.
• Change CIS.
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