Kyocera ECOSYS FS-C5350DN, Service Manual

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2K8
1-4-22
(1) No image appears (entirely white).
Print example Causes Check procedures/corrective measures
No trans-
fer
charging. Defective harness
between high voltage
PWB and engine PWB
(YC16), or improper con-
nector insertion. Reinsert the connector. Also check for continuity within the
connector harness. If none, remedy or replace the harness.
Defective high voltage
PWB. Replace the high voltage PWB (See page 1-5-34).
Defective engine PWB. Replace the engine PWB (See page 1-5-29).
No laser
beam
output. Defective laser scanner
unit. Replace the laser scanner unit YK and laser scanner unit MC
(See page 1-5-37).
Defective engine PWB. Replace the engine PWB (See page 1-5-29).
No
develop-
ing bias
output. Defective harness
between high voltage
PWB and engine PWB
(YC16), or improper con-
nector insertion. Reinsert the connector. Also check for continuity within the
connector harness. If none, remedy or replace the harness.
Defective high voltage
PWB. Replace the high voltage PWB (See page 1-5-34).
Defective engine PWB. Replace the engine PWB (See page 1-5-29).
Defective driving system of develop-
ing unit. Replace the developing unit (See page 1-5-12).
Image
synchro-
nization
signal
failure. Defective harness
between engine PWB
(YC31) and main PWB
(YC6), or improper con-
nector insertion. Reinsert the connector. Also check for continuity within the
connector harness. If none, remedy or replace the harness.