The Background Is Colored; White Streaks Are Printed Vertically - Olivetti PG L2140 Service Manual

(4) The background is colored.

Print example
Defective
main
charger out-
put.
Defective
developer
bias output.
Deteriorated toner.

(5) White streaks are printed vertically.

Print example
Foreign matter in the devel-
oper unit.
Adhesion of soiling to transfer
roller.
Dust adhesion to the charger
roller unit.
Dirty dust shield glass of laser
scanner unit.
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 developer unit.
Defective high voltage
PWB.
Defective engine PWB.
Causes
Check if the magnetic brush is formed uniformly. Replace
the developer unit if any foreign matter (see page 1-5-13).
Clean the transfer roller. Replace the transfer roller if it is
extremely dirty (see page 1-5-16).
Clean the chager roller unit.
Clean the dust shield glass of laser scanner unit.
1-4-27
Service Manual
Check procedures/corrective measures
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)
Replace the high voltage PWB
(see page 1-5-26).
Replace the engine PWB (see page 1-5-22).
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 (YC10)
Replace the developer unit
(see page 1-5-13).
Replace the high voltage PWB
(see page 1-5-26).
Replace the engine PWB (see page 1-5-22).
Perform the drum surface refreshing opera-
tion.
Check procedures/corrective measures
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