2LY/2LZ
1-4-14
1-4-4 Electric problems
Problem Causes Check procedures/corrective measures
(1)
The machine does
not operate when the
power switch is
turned on.
No electricity at the power
outlet.
Measure the input voltage.
The power cord is not
plugged in properly.
Check the contact between the power plug and the outlet.
The top cover is not closed
completely.
Check the top cover.
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 source PWB (See page 1-5-22).
Blown fuse in the power
source PWB.
Check for continuity. If none, remove the cause of blowing and
replace the power source PWB (See page 1-5-22).
Defective interlock switch. Check for continuity across the contacts of interlock switch. If
none, replace the power source PWB (See page 1-5-22).
Defective power source
PWB.
Replace the power source PWB (See page 1-5-22).
Defective control PWB. Replace the control PWB (See page 1-5-19).
(2)
Right cooling fan
motor does not oper-
ate.
Broken right cooling fan
motor coil.
Check for continuity across the coil. If none, replace the right cool-
ing fan motor.
Defective harness between
right cooling fan motor and
control PWB (YC315), or
improper connector inser-
tion.
Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
Defective control PWB. Replace the control PWB (See page 1-5-19).
(3)
Left cooling fan
motor does not oper-
ate.
Broken left cooling fan
motor coil.
Check for continuity across the coil. If none, replace the left cool-
ing fan motor.
Defective harness between
left cooling fan motor and
control PWB (YC104), or
improper connector inser-
tion.
Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
Defective control PWB. Replace the control PWB (See page 1-5-19).
(4)
Registration clutch
does not operate.
Broken registration clutch
coil.
Check for continuity across the coil. If none, replace the registra-
tion clutch.
Defective harness between
registration clutch and con-
trol PWB (YC308), or
improper connector inser-
tion.
Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
Defective control PWB. Replace the control PWB (See page 1-5-19).
(5)
Paper feed clutch
does not operate.
Broken paper feed clutch
coil.
Check for continuity across the coil. If none, replace the paper
feed clutch.
Defective harness between
paper feed clutch and con-
trol PWB (YC308), or
improper connector inser-
tion.
Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
Defective control PWB. Replace the control PWB (See page 1-5-19).
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