Electric Problems - Kyocera FS-3040MFP+ Service Manual

1-4-4 Electric problems

Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem
(1)
The machine does
not operate when
the main power
switch is turned on.
(2)
Switchback motor
does not operate.
(3)
Toner motor does
not operate.
Causes
1. No electricity at the
power outlet.
2. The power cord is
not plugged in prop-
erly.
3. The top cover is not
closed completely.
4. Broken power cord.
5. Defective main
power switch.
6. Defective interlock
switch.
7. Defective power
source PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective drive trans-
mission system.
3. Defective motor.
4. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective motor.
3. Defective PWB.
Check procedures/corrective measures
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check the top cover.
Check for continuity. If none, replace the cord.
Check for continuity across the contacts. If none, replace
the power source PWB (see page 1-5-37).
Check for continuity across the contacts of interlock switch.
If none, replace the power source PWB (see page 1-5-37).
Replace the power source PWB (see page 1-5-37).
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)
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
Replace the switchback motor.
Replace the engine PWB or connect-R PWB and check for
correct operation (see page 1-5-30).
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)
Replace the toner motor.
Replace the engine PWB or connect-L PWB and check for
correct operation (see page 1-5-30).
1-4-21
2MF/2MG