Utax CLP 3521, Service Manual, Page: 81 / 187

2HL/2HM/2HN
1-4-28
1-4-4 Electric problems
Problem Causes Check procedures/corrective measures
(1)The machine does
not operate when the
power switch is
turned on. The power cord is not
plugged in properly. Check the contact between the power plug and the outlet.
No electricity at the power
outlet. Measure the input voltage.
Broken power cord. Check for continuity. If none, replace the cord.
Defective power switch. Check for continuity across the contacts. If none, replace the
power switch.
Defective power source
PWB. Replace the power source PWB (See page 1-5-27).
(2)Drum motor M/C/
Y/K, duplex motor
and fuser motor do
not operate. 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.
Drum motor M/C/Y/K - Engine PWB (YC18)
Duplex motor - Engine PWB (YC17)
Fuser motor - Engine PWB (YC39)
Broken the gear. Check visually and replace the gear if necessary.
Defective motor. Replace the motor.
Defective engine PWB. Replace the engine PWB (See page 1-5-30).
(3)Power source fan
motor, ozone fan
motor, developing fan
motor1/2 and fuser
fan motor 1/2 do not
operate. Broken the fan motor coil. Check for continuity across the coil. If none, replace the fan
motor.
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.
Power source fan motor - Engine PWB (YC8)
Ozone fan motor - Engine PWB (YC11)
Developing fan motor 1 - Engine PWB (YC10)
Developing fan motor 2 - Engine PWB (YC41)
Fuser fan motor 1 - Paper exit PWB (YC2)
Fuser fan motor 2 - Engine PWB (YC44)
Defective engine PWB. Replace the engine PWB (See page 1-5-30).
(4)Paper feed clutch,
registration clutch,
developing clutch K,
duplex clutch and
intermediate clutch
do not operate. Broken clutch coil. Check for continuity across the coil. If none, replace the clutch.
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.
Paper feed clutch - Engine PWB (YC26)
Registration clutch - Engine PWB (YC26)
Developing clutch K - Engine PWB (YC26)
Duplex clutch - Engine PWB (YC3)
Intermediate clutch - Engine PWB (YC3)
Defective engine PWB. Replace the engine PWB (See page 1-5-30).
(5)MP paper feed
solenoid, ID solenoid,
duplex solenoid do
not operate. Broken solenoid coil. Check for continuity across the coil. If none, replace the solenoid.
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 paper feed solenoid - Engine PWB (YC40)
ID solenoid - Engine PWB (YC43)
Duplex solenoid - Engine PWB (YC3)
Defective engine PWB. Replace the engine PWB (See page 1-5-30).