Kyocera TASKalfa 420i Service Manual page 214

2KR/2KS
Problem
(5)
Fuser fan motor,
developing fan motor,
LSU fan motor, paper
conveying fan motor
1/2/3 or duplex fan
motor 1/2/3 does not
operate.
(6)
Controller fan motor
does not operate.
(7)
Scanner fan motor
does not operate.
1-4-56
Causes
1. Poor contact in the con-
nector terminals.
2. Broken motor coil.
3. Defective motor.
4. Defective engine PWB.
1. Poor contact in the con-
nector terminals.
2. Broken motor coil.
3. Defective motor.
4. Defective main PWB.
1. Poor contact in the con-
nector terminals.
2. Broken motor coil.
3. Defective motor.
4. Defective ISM PWB.
5. Defective ISC PWB.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity across the coil. If none, replace the motor.
Run maintenance item U037 and check if the motor operates
when the following terminals on the PWB goes low. If not, replace
the corresponding motor.
Fuser fan motor: YC10-A14 on the engine PWB
Developing fan motor: YC12-B12 on the engine PWB
LSU fan motor: YC12-B3 on the engine PWB
Paper conveying fan motor 1/2/3: YC4-B7 on the engine PWB
Duplex fan motor 1/2/3: YC4-B10 on the engine PWB
Run maintenance item U037 and check if following terminals on
the PWB goes low. If not, replace the engine PWB.
Fuser fan motor: YC10-A14 on the engine PWB
Developing fan motor: YC12-B12 on the engine PWB
LSU fan motor: YC12-B3 on the engine PWB
Paper conveying fan motor 1/2/3: YC4-B7 on the engine PWB
Duplex fan motor 1/2/3: YC4-B10 on the engine PWB
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity across the coil. If none, replace the motor.
Run maintenance item U037 and check if the motor operates
when the following terminals on the PWB goes low. If not, replace
the corresponding motor.
Controller fan motor: YC23-1 on the main PWB
Run maintenance item U037 and check if following terminals on
the PWB goes low. If not, replace the main PWB.
Controller fan motor: YC23-1 on the main PWB
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity across the coil. If none, replace the motor.
Run maintenance item U037 and check if the motor operates
when the following terminals on the PWB goes low. If not, replace
the corresponding motor.
Scanner fan motor: YC3-2 on the ISM PWB
Run maintenance item U037 and check if following terminals on
the ISM PWB goes low. If not, replace the ISM PWB.
Scanner fan motor: YC3-2 on the ISM PWB
Run maintenance item U037 and check if following terminals on
the ISC PWB goes high. If not, replace the ISC PWB.
Scanner fan motor: YC3-24 on the ISC PWB