No Image Appears (Entirely White) - Kyocera TASKalfa 1800 Service Manual

(1) No image appears (entirely white).

Print example
1. Table scanning
Defective part
Contact glass assy Check the location the contact
1
FFC cable CIS
2
Home position sen-
3
sor
Scanner drive belt
4
Scanner drive gear Check that the scanner drive
5
CIS PWB
6
Main/Engine PWB
7
Check description
glass is mounted.
Check the FFC cable between
the CIS and main/engine PWB is
properly connected. Or, verify
conduction of the wire.
Check the location the home
position sensor is mounted.
Check that the scanner drive belt
is loosely mounted.
gear is loosely mounted.
The CIS PWB is defective.
The main/engine PWB is defec-
tive.
Re-mount the contact glass if it is hanged off.
Reinsert the connector if it its connection is
loose. Or, if conduction is lot, replace the wire.
Re-mount the home position sensor if it is
hanged off.
If the scanner drive belt is loosely mounted,
secure the screws.
If the scanner drive gear loosely mounted,
secure the screw.
Replace the ISU and perform U411.
(see page 1-3-75)
Replace the main/engine PWB.(see page 2-2-
11)
1-4-38
2NC/2NF/2NG/2NN/3P7/3P8/3P9
Corrective Action