2KZ/2K0
1-4-42
(3) Image is too light.
(4) The background is colored.
(5) White streaks are printed vertically.
Print example Causes Check procedures/corrective measures
Defective
transfer
charger out-
put.
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 (YC15)
High voltage PWB sub and engine PWB
(YC13)
Defective high voltage
PWB.
Replace the high voltage PWB
(see page 1-5-35).
Defective high voltage PWB
sub.
Replace the high voltage PWB sub
(see page 1-5-35).
Defective engine PWB. Replace the engine PWB (see page 1-5-31).
Insufficient toner. If the display shows the message requesting
toner replenishment, replace the container.
Deteriorated toner. Perform the drum refresh operation.
Print example Causes Check procedures/corrective measures
Defective
main
charger out-
put.
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 (YC15)
Defective high voltage
PWB.
Replace the high voltage PWB.
Defective engine PWB. Replace the engine PWB (see page 1-5-31).
Deteriorated toner. Perform the drum refresh operation.
Print example Causes Check procedures/corrective measures
Foreign matter in the devel-
oper unit.
Check if the magnetic brush is formed uniformly. Replace
the developer unit if any foreign matter (see page 1-5-14).
Dirty shading plate. Clean the shading plate.
Adhesion of soiling to transfer
belt.
Clean the transfer belt. Replace the intermadiate transfer
unit if it is extremely dirty (see page 1-5-17).
Adhesion of soiling to transfer
roller.
Clean the transfer roller. Replace the transfer roller unit if it
is extremely dirty (see page 1-5-17).
Dirty LSU dust shield glass. Perform the LSU dust shield glass cleaning.
Service Manual Y113010-4
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