Utax CLP 3521

2HL/2HM/2HN
1-4-23
(2) No image appears (entirely black).
(3) A specific color is printed solid.
(4) The back side gets dirty.
Print example Causes Check procedures/corrective measures
No main
charging.
Defective harness
between high voltage
PWB and engine PWB
(YC16), or improper con-
nector insertion.
Reinsert the connector. Also check for continuity within the
connector harness. If none, remedy or replace the harness.
Defective main charger
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 PWB (See page 1-5-30).
The laser
is acti-
vated
simulta-
neously
for all
colors.
Defective laser scanner
unit.
Replace the laser scanner unit YK and laser scanner unit MC
(See page 1-5-38).
Print example Causes Check procedures/corrective measures
Defective main charger unit which
corresponds to the color causing the
problem.
Check if the main charger unit is properly seated. If necessary,
reseat it properly.
Disconnected main charger wire. Replace the main charger unit (See page 1-5-16, 1-5-16).
Laser of laser scanner unit for solid
color printing is ON.
Defective laser scanner unit.
Replace the laser scanner unit YK and laser scanner unit MC
(See page 1-5-38).
Print example Causes Check procedures/corrective measures
Dirty secondary transfer roller. Clean the secondary transfer roller.
Dirty paper conveying path. Clean the paper conveying path.
Dirty heat roller and press roller. Clean the heat roller and press roller.