2KA
1-4-63
(7)
Loop fan motor does
not operate.
1. Broken fan motor coil. Check for continuity across the coil. If none, replace the fan motor.
2. 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.
3. Defective fan motor. Run maintenance item U037 and check if the fan motor operates
when the following terminals on the PWB goes low. If not, replace
the corresponding fan motor.
Loop fan motor: YC14-A14 on the feed PWB
4. Defective feed PWB. Run maintenance item U037 and check if following terminals on
the feed PWB goes low. If not, replace the feed PWB.
Loop fan motor: YC14-A14 on the feed PWB
5. Defective engine PWB. Run maintenance item U037 and check if following terminals on
the engine PWB goes low. If not, replace the engine PWB.
Loop fan motor: YC20-A2 on the engine PWB
(8)
Main fan motor or
developing fan motor
3/4 does not operate.
1. Broken fan motor coil. Check for continuity across the coil. If none, replace the fan motor.
2. 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.
(9)
Middle motor or
transfer motor does
not operate.
1. Broken fan motor coil. Check for continuity across the coil. If none, replace the fan motor.
2. 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.
(10)
Paper feed clutch 1/2
or feed clutch 1/2
does not operate.
1. Broken clutch coil. Check for continuity across the coil. If none, replace the clutch.
2. 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.
3. Defective feed PWB. Run maintenance item U032 and check if following terminals on
the feed PWB goes low. If not, replace the feed PWB.
Paper feed clutch 1: YC5-2 on the feed PWB
Paper feed clutch 2: YC1-2 on the feed PWB
Feed clutch 1: YC13-3 on the feed PWB
Feed clutch 2: YC13-1 on the feed PWB
4. Defective engine PWB. Run maintenance item U032 and check if following terminals on
the engine PWB goes low. If not, replace the engine PWB.
Paper feed clutch 1: YC20-B2 on the engine PWB
Paper feed clutch 2: YC20-A8 on the engine PWB
Feed clutch 1: YC20-B8 on the engine PWB
Feed clutch 2: YC20-B7 on the engine PWB
(11)
MP paper feed
clutch, MP paper
conveying clutch or
fuser clutch does not
operate.
1. Broken clutch coil. Check for continuity across the coil. If none, replace the clutch.
2. 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.
3. Defective engine PWB. Run maintenance item U032 and check if following terminals on
the engine PWB goes low. If not, replace the engine PWB.
MP paper feed clutch: YC23-20 on the engine PWB
MP paper conveying clutch: YC10-B18 on the engine PWB
Fuser clutch: YC25-B10 on the engine PWB
Problem Causes Check procedures/corrective measures