No Image Appears (Entirely White) - Kyocera TASKalfa 4500i Service Manual

(1) No image appears (entirely white).

Print example
Defective
transfer
bias output.
Defective
developer
bias output.
No LSU
laser is out-
put.
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 engine PWB.
1-4-65
Check procedures/corrective measures
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB (YC2) and engine PWB
(YC16)
Replace the high voltage PWB
(see page 1-5-52).
Replace the engine PWB (see page 1-5-47).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB (YC1) and engine PWB
(YC17)
Replace the high voltage PWB
(see page 1-5-52).
Replace the engine PWB (see page 1-5-47).
Replace the laser scanner unit
(see page 1-5-24).
Replace the engine PWB (see page 1-5-47).
2LL/2LJ/2LH-1