Kyocera TASKalfa 420i, Service Manual

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2KR/2KS
1-4-56
(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. 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 motor coil. Check for continuity across the coil. If none, replace the motor.
3. Defective 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
4. Defective 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
(6)
Controller fan 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 motor coil. Check for continuity across the coil. If none, replace the motor.
3. Defective 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
4. Defective 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
(7)
Scanner fan 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 motor coil. Check for continuity across the coil. If none, replace the motor.
3. Defective 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
4. Defective 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
5. Defective ISC 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
Problem Causes Check procedures/corrective measures