2P7/2R0/3PN
1-4-25
(4) The background is colored.
(5) White streaks are printed vertically.
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.
Chager roller unit and high voltage PWB
High voltage PWB and engine PWB (YC19)
Defective high voltage
PWB.
Replace the high voltage PWB
(see page 1-5-54).
Defective engine PWB. Replace the engine PWB (see page 1-5-40).
Defective
developer
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.
Developer unit and high voltage PWB
High voltage PWB and engine PWB (YC19)
Defective developer unit. Replace the developer unit
(see page 1-5-14).
Defective high voltage
PWB.
Replace the high voltage PWB
(see page 1-5-54).
Defective engine PWB. Replace the engine PWB (see page 1-5-40).
Deteriorated toner. Perform the drum surface refreshing opera-
tion.
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).
Adhesion of soiling to transfer
roller.
Clean the transfer roller. Replace the transfer roller if it is
extremely dirty (see page 1-5-21).
Dust adhesion to the charger
roller unit.
Clean the chager roller unit.
Dirty dust shield glass of laser
scanner unit.
Clean the dust shield glass of laser scanner unit.
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