Utax CLP 3521

2HL/2HM/2HN
1-4-24
(5) Image is too light.
(6) The background is colored.
Print example Causes Check procedures/corrective measures
Defec-
tive
develop-
ing bias
output.
Defective developing unit. Replace the developing unit for the color that causes an error.
Defective high voltage
PWB.
Replace the high voltage PWB (See page 1-5-35).
Defective engine PWB. Replace the engine (See page 1-5-30).
Dirty drum. Perform the drum surface refreshing (See page 1-3-12).
Defec-
tive
develop-
ing bias
output.
Defective high voltage
PWB.
Replace the high voltage PWB (See page 1-5-35).
Defective engine PWB. Replace the engine (See page 1-5-30).
Defective color calibration. Perform the color calibration (Refer to operation guide).
Insufficient toner. If the display shows the message requesting toner replenish-
ment, replace the container.
Insufficient agitation of toner con-
tainer.
Shake the toner container vertically approximately 10 times.
Paper damp. Check the paper storage conditions, replace the paper.
Print example Causes Check procedures/corrective measures
Defective color calibration. Perform the color calibration (Refer to operation guide).
Defec-
tive
develop-
ing bias
output.
Defective developing unit. 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 1-5-13).
Defective high voltage
PWB.
Replace the high voltage PWB (See page 1-5-35).
Defective engine PWB. Replace the engine (See page 1-5-30).
Defec-
tive drum
surface
charging.
Defective drum unit. Replace the drum unit (See page 1-5-15).
Defective high voltage
PWB.
Replace the high voltage PWB (See page 1-5-35).
Defective engine PWB. Replace the engine (See page 1-5-30).