Service manual

Alignment and Troubleshooting

4-40

Service Manual

4.3.2.1(b) PC-Scan

PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE

Scanning Error • Check the printer cable installed. • Check correct installation, and use standard

USB cable.

• Check how TWAIN driver is

installed.

• Remove any other scanner driver.

• Reboot after reinstallation of the TWAIN driver.

• Check the USB signal level. • If USB signal level is defective, replace Main

PBA.

Defective image

Quality

• Check shading proﬁle.

• Check the gap between original and

scanner glass.

• 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.