Image Is Too Light; The Background Is Colored - Kyocera FS-C5350DN Service Manual

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(5) Image is too light.

Print example
Defec-
tive
develop-
ing bias
output.
Dirty drum.
Defec-
tive
develop-
ing bias
output.
Defective color calibration.
Insufficient toner.
Insufficient agitation of toner con-
tainer.
Paper damp.

(6) The background is colored.

Print example
Defective color calibration.
Defec-
tive
develop-
ing bias
output.
Defec-
tive drum
surface
charging.
1-4-24
Causes
Defective developing unit.
Defective high voltage
PWB.
Defective engine PWB.
Defective high voltage
PWB.
Defective engine PWB.
Causes
Defective developing unit.
Defective high voltage
PWB.
Defective engine PWB.
Defective drum unit.
Defective high voltage
PWB.
Defective engine PWB.
Check procedures/corrective measures
Replace the developing unit for the color that causes an error.
Replace the high voltage PWB (See page 1-5-34).
Replace the engine (See page 1-5-29).
Perform the drum surface refreshing (See page 1-3-12).
Replace the high voltage PWB (See page 1-5-34).
Replace the engine (See page 1-5-29).
Perform the color calibration (Refer to operation guide).
If the display shows the message requesting toner replenish-
ment, replace the container.
Shake the toner container vertically approximately 10 times.
Check the paper storage conditions, replace the paper.
Check procedures/corrective measures
Perform the color calibration (Refer to operation guide).
Check the four colors of image by using the test page of ser-
vice mode. If the defect appears on a particular color, replace
the developer for that color (See page 1-5-12).
Replace the high voltage PWB (See page 1-5-34).
Replace the engine (See page 1-5-29).
Replace the drum unit (See page 1-5-14).
Replace the high voltage PWB (See page 1-5-34).
Replace the engine (See page 1-5-29).