No Image Appears (Entirely White); No Image Appears (Entirely Black) - Kyocera FS-6525MFP Service Manual

(1) No image appears (entirely white).

Print example
Defective
transfer
bias output.
Defective
developer
bias output.
No LSU
laser is out-
put.

(2) No image appears (entirely black).

Print example
No main
charging.
Exposure
lamp fails to
light.
Causes
Defective connector cable
or poor contact in the con-
nector.
Defective high voltage
PWB.
Defective engine PWB.
Defective connector cable
or poor contact in the con-
nector.
Defective high voltage
PWB.
Defective engine PWB.
Defective laser scanner
unit.
Defective main PWB.
Causes
Defective connector cable
or poor contact in the con-
nector.
Defective charger roller unit. Replace the charger roller unit
Defective high voltage
PWB.
Defective engine PWB.
Defective connector cable
or poor contact in the con-
nector.
Defective CCD PWB.
Defective main PWB.
1-4-22
Check procedures/corrective measures
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC10)
Replace the high voltage PWB
(see page 1-5-37).
Replace the engine PWB (see page 1-5-35).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC10)
Replace the high voltage PWB
(see page 1-5-37).
Replace the engine PWB (see page 1-5-35).
Replace the laser scanner unit
(see page 1-5-23).
Replace the main PWB (see page 1-5-34).
Check procedures/corrective measures
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC10)
(see page 1-5-19).
Replace the high voltage PWB
(see page 1-5-37).
Replace the engine PWB (see page 1-5-35).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
LED PWB and main PWB (YC112)
CCD PWB and main PWB (YC113)
Replace the image scanner unit
(see page 1-5-24).
Replace the main PWB (see page 1-5-34).
2MW/2MX