Kyocera KM-4230 Service Manual page 523

2A3/4
Problem
(16)
The lower
paper feed
clutch does
not operate.
(17)
Feed clutch 1
does not op-
erate.
(18)
Feed clutch 2
does not
operate.
(19)
Feed clutch 3
does not op-
erate.
3-6-78
Causes
Broken lower pa-
per feed clutch
coil.
Poor contact in the
lower paper feed
clutch connector
terminals.
Defective engine
PCB.
Broken feed clutch
1 coil.
Poor contact in
feed clutch 1 con-
nector terminals.
Defective engine
PCB.
Broken feed clutch
2 coil.
Poor contact in
feed clutch 2 con-
nector terminals.
Defective engine
PCB.
Broken feed clutch
3 coil.
Poor contact in
feed clutch 3 con-
nector terminals.
Defective engine
PCB.
Check procedures/corrective measures
Check for continuity across the coil. If none,
replace the lower paper feed clutch.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, remedy or replace the cable.
Run maintenance item U032 and check if
CN15-14 on the engine PCB goes low. If
not, replace the engine PCB.
Check for continuity across the coil. If none,
replace feed clutch 1.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, remedy or replace the cable.
Run maintenance item U032 and check if
CN12-A4 on the engine PCB goes low. If
not, replace the engine PCB.
Check for continuity across the coil. If none,
replace feed clutch 2.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, remedy or replace the cable.
Run maintenance item U032 and check if
CN12-A8 on the engine PCB goes low. If
not, replace the engine PCB.
Check for continuity across the coil. If none,
replace feed clutch 3.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, remedy or replace the cable.
Run maintenance item U032 and check if
CN12-A10 on the engine PCB goes low. If
not, replace the engine PCB.