No Image Appears (Entirely White) - Kyocera FS-C5350DN Service Manual

2K8

(1) No image appears (entirely white).

Print example
No trans-
fer
charging.
No laser
beam
output.
No
develop-
ing bias
output.
Defective driving system of develop-
ing unit.
Image
synchro-
nization
signal
failure.
1-4-22
Causes
Defective harness
between high voltage
PWB and engine PWB
(YC16), or improper con-
nector insertion.
Defective high voltage
PWB.
Defective engine PWB.
Defective laser scanner
unit.
Defective engine PWB.
Defective harness
between high voltage
PWB and engine PWB
(YC16), or improper con-
nector insertion.
Defective high voltage
PWB.
Defective engine PWB.
Defective harness
between engine PWB
(YC31) and main PWB
(YC6), or improper con-
nector insertion.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector harness. If none, remedy or replace the harness.
Replace the high voltage PWB (See page 1-5-34).
Replace the engine PWB (See page 1-5-29).
Replace the laser scanner unit YK and laser scanner unit MC
(See page 1-5-37).
Replace the engine PWB (See page 1-5-29).
Reinsert the connector. Also check for continuity within the
connector harness. If none, remedy or replace the harness.
Replace the high voltage PWB (See page 1-5-34).
Replace the engine PWB (See page 1-5-29).
Replace the developing unit (See page 1-5-12).
Reinsert the connector. Also check for continuity within the
connector harness. If none, remedy or replace the harness.