Utax CLP 3521, Service Manual, Page: 82 / 187

2HL/2HM/2HN
1-4-29
(6)Main charging is
not performed. Defective harness or
improper connector inser-
tion. Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the high voltage PWB
(See page 1-5-35).
High voltage PWB - Engine PWB (YC16)
Defective main charger unit Replace the main charger unit (See page 1-5-16).
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).
(7)No developing
bias is output. Defective harness or
improper connector inser-
tion. Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the high voltage PWB
(See page 1-5-35).
High voltage PWB - Engine PWB (YC16)
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).
(8)Transfer charging
is not performed. Defective harness or
improper connector inser-
tion. Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the high voltage PWB
(See page 1-5-35).
High voltage PWB - Engine PWB (YC16)
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).
(9)The message
requesting paper to
be loaded is shown
when paper is
present in the cas-
sette. Defective paper sensor 1/2. Replace the engine PWB (See page 1-5-30).
Broken paper sensor 1/2
actuator. Check the bending of the actuator lever of the paper sensor 1/2 if
there is trouble, remedy or replace.
Defective engine PWB. Replace the engine PWB (See page 1-5-30).
(10)The message
requesting paper to
be loaded is shown
when paper is
present in the MP
tray. Defective harness or
improper connector inser-
tion. Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
MP tray sensor - Engine PWB (YC21)
Defective MP tray sensor. Replace the MP tray sensor.
Defective engine PWB. Replace the engine PWB (See page 1-5-30).
(11)The size of paper
in the cassette is not
displayed correctly. Defective harness or
improper connector inser-
tion. Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
Cassette size switch - Engine PWB (YC9)
Defective cassette size
switch. Replace the cassette size switch.
Defective engine PWB. Replace the engine PWB (See page 1-5-30).
(12)A paper jam in
the paper feed sec-
tion, paper conveying
section, fuser sec-
tion or duplex section
is indicated when the
power switch is
turned on. A piece of paper torn from
copy paper is caught
around registration switch,
duplex conveying sensor or
paper exit sensor. Check and remove if any.
Defective registration sen-
sor or duplex conveying
sensor. Replace the registration sensor or duplex conveying sensor.
Defective paper exit sensor. Replace the paper exit PWB.
Defective engine PWB. Replace the engine PWB (See page 1-5-30).
Problem Causes Check procedures/corrective measures