No Image Appears (Entirely Black); Table Scanning/Dp-Scanning - Kyocera TASKalfa 1800 Service Manual

(2) No image appears (entirely black).

Print example
1. Table scanning
Defective part
FFC cable CIS
1
CIS PWB
2
Main/Engine PWB
3
2. DP-scanning
Defective part
Scanning position
of the DP
1
FFC cable CIS
2
CIS PWB
3
Main/Engine PWB
4
Check description
Check the FFC cable between
the CIS and main/engine PWB is
properly connected. Or, verify
conduction of the wire.
The CIS PWB is defective.
The main/engine PWB is defec-
tive.
Check description
Confirm the value using mainte-
nance mode U068, DP Read.
Check the FFC cable between
the CIS and main/engine PWB is
properly connected. Or, verify
conduction of the wire.
The CIS PWB is defective.
The main/engine PWB is defec-
tive.
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
Replace the ISU and perform U411.
(see page 1-3-75)
Replace the main/engine PWB.(see page 2-2-
11)
If a large value is observed in maintenance
mode U068, DP Read, perform
adjustment.(see page 1-3-35)
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
Replace the ISU and perform U411.
(see page 1-3-75)
Replace the main/engine PWB.(see page 2-2-
11)
1-4-40
2NC/2NF/2NG/2NN/3P7/3P8/3P9
Corrective Action
Corrective Action