No Image Appears (Entirely Black); A Specific Color Is Printed Solid; The Back Side Gets Dirty - Kyocera FS-C5350DN Service Manual

(2) No image appears (entirely black).

Print example
No main
charging.
The laser
is acti-
vated
simulta-
neously
for all
colors.

(3) A specific color is printed solid.

Print example
Defective main charger unit which
corresponds to the color causing the
problem.
Disconnected main charger wire.
Laser of laser scanner unit for solid
color printing is ON.
Defective laser scanner unit.

(4) The back side gets dirty.

Print example
Dirty secondary transfer roller.
Dirty paper conveying path.
Dirty heat roller and press roller.
Causes
Defective harness
between high voltage
PWB and engine PWB
(YC16), or improper con-
nector insertion.
Defective main charger
unit.
Defective high voltage
PWB.
Defective engine PWB.
Defective laser scanner
unit.
Causes
Causes
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector harness. If none, remedy or replace the harness.
Replace the drum unit (See page 1-5-14).
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).
Check procedures/corrective measures
Check if the main charger unit is properly seated. If necessary,
reseat it properly.
Replace the main charger unit (See page 1-5-15).
Replace the laser scanner unit YK and laser scanner unit MC
(See page, 1-5-37).
Check procedures/corrective measures
Clean the secondary transfer roller.
Clean the paper conveying path.
Clean the heat roller and press roller.
2K8
1-4-23