Kyocera PF-660, Service Manual

Page: 31 / 54

3M0
1-4-5
1-4-3 Electric problems
Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem Causes Check procedures/corrective measures
(1)
The side feeder
paper feed motor,
side feeder paper
conveying motor
does not operate. 1. Poor contact in the con-
nector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Broken the gear. Check visually and replace the gear if necessary.
3. Defective motor. Run maintenance item U247 and check if the motor operates. If
not, replace the motor.
4. Defective side feeder
main PWB.
Run maintenance item U247 and check if the motor operates. If
not, replace the side feeder main PWB.
(2)
The side feeder lift
motor does not oper-
ate. 1. Poor contact in the con-
nector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Broken the gear. Check visually and replace the gear if necessary.
3. Defective side feeder
main PWB.
Run maintenance item U247 and check if YC4-5 and YC4-6 on
the side feeder main PWB goes low. If not, replace the side feeder
main PWB.
4. Defective motor. Run maintenance item U247 and check if the side feeder lift motor
operates. If not, replace the side feeder lift motor.
(3)
The message
requesting cover to
be closed is dis-
played when the top
cover is closed. 1. Poor contact of the top
cover switch connector
terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Broken lever of the top
cover switch.
Check visually and replace top cover switch if the lever is broken.
3. Defective top cover
switch.
Check for continuity across the contacts. If there is no continuity
when the top cover switch is on, replace it.