3MV
1-4-5
1-4-3 Electrical problem
Problem
Causes
Check procedures/corrective measures
(1)
The side feeder
paper feed clutch
does not operate.
Poor contact of the side
feeder paper feed clutch
connector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Broken side feeder paper
feed clutch coil.
Check for continuity across the coil. If none, replace the side
feeder paper feed clutch.
Defective side feeder paper
feed clutch.
Run maintenance item U247 and check if the side feeder paper
feed clutch does not operate when YC5-A10 on the side feeder
main PWB goes low. If so, replace the side feeder paper feed
clutch.
Defective side feeder main
PWB.
Run maintenance item U247 and check if YC5-A10 on the side
feeder main PWB goes low. If not, replace the side feeder main
PWB.
(2)
The side feeder
paper conveying
clutch does not oper-
ate.
Poor contact of the side
feeder paper conveying
clutch connector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Broken side feeder paper
conveying clutch coil.
Check for continuity across the coil. If none, replace the side
feeder paper conveying clutch.
Defective side feeder paper
conveying clutch.
Run maintenance item U247 and check if the side feeder paper
conveying clutch does not operate when YC6-B7 on the side
feeder main PWB goes low. If so, replace the side feeder paper
conveying clutch.
Defective side feeder main
PWB.
Run maintenance item U247 and check if YC6-B7 on the side
feeder main PWB goes low. If not, replace the side feeder main
PWB.
(3)
The separation fan
motor does not oper-
ate.
Poor contact of the separa-
tion fan motor connector
terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective separation fan
motor.
Run maintenance item U247 and check if the separation fan
motor does not operate when YC6-A1 on the side feeder main
PWB goes low. If so, replace the separation fan motor.
Defective side feeder main
PWB.
Run maintenance item U247 and check if YC6-A1 on the side
feeder main PWB goes low. If not, replace the side feeder main
PWB.
(4)
The suction fan
motor does not oper-
ate.
Poor contact of the suction
fan motor connector termi-
nals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective suction fan motor. Run maintenance item U247 and check if the suction fan motor
does not operate when YC6-A2 on the side feeder main PWB
goes low. If so, replace the side feeder main PWB.)
Defective side feeder main
PWB.
Run maintenance item U247 and check if YC6-A2 on the side
feeder main PWB goes low. If not, replace the side feeder main
PWB.
Y110900-9 Service Manual
Summary of Contents for PF-650(B)
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