2KT/2KV
1-4-30
(1) No image appears (entirely white).
(2) No image appears (entirely black).
Print example Causes Check procedures/corrective measures
Defective
transfer
bias output.
Defective connector cable
or poor contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC11)
Defective high voltage
PWB.
Replace the high voltage PWB
(see page 1-5-34).
Defective engine PWB. Replace the engine PWB (see page 1-5-26).
Defective
developing
bias output.
Defective connector cable
or poor contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC11)
Defective high voltage
PWB.
Replace the high voltage PWB
(see page 1-5-34).
Defective engine PWB. Replace the engine PWB (see page 1-5-26).
No LSU
laser is out-
put.
Defective laser scanner
unit.
Replace the laser scanner unit KM/CY
(see page 1-5-43).
Defective engine PWB. Replace the engine PWB (see page 1-5-26).
Print example Causes Check procedures/corrective measures
No main
charging.
Defective connector cable
or poor contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC11)
Defective charger roller unit. Replace the drum unit (see page 1-5-20).
Defective high voltage
PWB.
Replace the high voltage PWB
(see page 1-5-34).
Defective engine PWB. Replace the engine PWB (see page 1-5-26).
The laser is
activated
simultane-
ously for all
colors.
Defective laser scanner
unit.
Replace the laser scanner unit KM/CY
(see page 1-5-43).