2LW/2LX
1-4-20
1-4-4 Electric problems
Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem Causes Check procedures/corrective measures
(1)
The machine does
not operate when
the main power
switch is turned on.
1. No electricity at the
power outlet.
Measure the input voltage.
2. The power cord is
not plugged in prop-
erly.
Check the contact between the power plug and the outlet.
3. The top cover is not
closed completely.
Check the top cover.
4. Broken power cord. Check for continuity. If none, replace the cord.
5. Defective main
power switch.
Check for continuity across the contacts. If none, replace
the power source PWB (see page 1-5-37).
6. Defective interlock
switch.
Check for continuity across the contacts of interlock switch.
If none, replace the power source PWB (see page 1-5-37).
7. Defective power
source PWB.
Replace the power source PWB (see page 1-5-37).
(2)
Switchback motor
does not operate.
1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Switchback motor and connect-R PWB (YC3)
Connect-R PWB (YC1) and engine PWB (YC9)
2. Defective drive trans-
mission system.
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
3. Defective motor. Replace the switchback motor.
4. Defective PWB. Replace the engine PWB or connect-R PWB and check for
correct operation (see page 1-5-30).
(3)
Toner motor does
not operate.
1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Toner motor and developing PWB (YC2)
Developing PWB (YC1) and connect-L PWB (YC9)
Connect-L PWB (YC8) and engine PWB (YC503)
2. Defective motor. Replace the toner motor.
3. Defective PWB. Replace the engine PWB or connect-L PWB and check for
correct operation (see page 1-5-30).
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