Service manual

Alignment and Troubleshooting

4-39

Service Manual

4.2.3 Solution

4.3.2.1 Scanner

4.3.2.1(a)COPY

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

White copy • Check the Scan-Cover open. • Room light can transit a thin original.

• Check shading proﬁle. • Execute the shading test in the diagnostic

mode.

Black copy • Check the CCD problem in Main

PBA.

• Check the CCD harness contact.

• Check shading proﬁle. • Execute the shading test in the diagnostic

mode.

Defective image

quality

• Check shading proﬁle.

• Check the gap between original and

scanner.

• Execute the shading test in the diagnostic

mode.

• The gap above 0.5mm can cause a blurred

image.

• Check printing quality. • See “Print” troubleshooting.

Abnormal noise • Check the Scanner Motor and any

mechanical disturbance.

• Check the right position of the Scanner Motor,

and check the any mechanical disturbance in

the CCD carriaging part.

• Check the Motor Driver in Driver

PBA.

• If any driver is defective, replace it.