Image Is Too Light; Background Is Visible; A White Line Appears Longitudinally - Kyocera TASKalfa 300i Service Manual

2K5

(3) Image is too light.

Copy example
Insufficient toner.
Deteriorated toner.
Defective
transfer
charging
output.

(4) Background is visible.

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Deteriorated toner.
Dirty main charger wire.

(5) A white line appears longitudinally.

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Foreign matter in the developing unit.
Dirty shading plate.
1-4-36
Causes
The connector terminals
of the high voltage PWB
make poor contact.
Defective engine PWB.
Defective high voltage
PWB.
Causes
Causes
Check procedures/corrective measures
If the display shows the message requesting toner replenish-
ment, replace the container.
Perform the drum refresh operation.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check if YC12-11 on the engine PWB goes low when main-
tenance item U101 is run. If not, replace the engine PWB.
Check if transfer charging takes place when CN1-2 on the
high voltage PWB goes low while maintenance item U101 is
run. If not, replace the high voltage PWB.
Check procedures/corrective measures
Perform the drum refresh operation.
Clean the wire or, if it is extremely dirty, replace it (see page
1-5-33).
Check procedures/corrective measures
Check if the magnetic brush is formed uniformly. Replace the
developing unit if any foreign matter (see page 1-5-35).
Clean the shading plate.