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Problem
(32)
Developing fan motor
1 or 2 does not oper-
ate.
(33)
The image formation
fan motor does not
operate.
(34)
The developing duct
fan motor does not
operate.
(35)
PWB fan motor 1 or 2
does not operate.
(36)
The power source
fan motor does not
operate.
Y104350-7
Causes
Defective developing fan
motor 2.
Defective fan motors drive
PWB.
Defective engine PWB.
Broken image formation fan
motor coil.
Poor contact in image for-
mation fan motor connector
terminals.
Defective image formation
fan motor.
Defective engine PWB.
Broken developing duct fan
motor coil.
Poor contact in developing
duct fan motor connector
terminals.
Defective developing duct
fan motor.
Defective engine PWB.
Broken PWB fan motor 1 or
2 coil.
Poor contact in PWB fan
motor 1 or 2 connector ter-
minals.
Defective PWB fan motor 1. Run maintenance item U037 and check if PWB fan motor 1 oper-
Defective PWB fan motor 2. Run maintenance item U037 and check if PWB fan motor 2 oper-
Defective fan motors drive
PWB.
Defective engine PWB.
Broken power source fan
motor coil.
Poor contact in power
source fan motor connector
terminals.
Check procedures/corrective measures
Run maintenance item U037 and check if developing fan motor 2
operates when YC2-11 on the fan motors drive PWB goes low. If
not, replace developing fan motor 2.
Run maintenance item U037 and check if YC2-9 or YC2-11 on the
fan motors drive PWB goes low. If not, replace the fan motors
drive PWB.
Run maintenance item U037 and check if YC13-3 on the engine
PWB goes low. If not, replace the engine PWB.
Check for continuity across the coil. If none, replace the image for-
mation fan motor.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Run maintenance item U037 and check if the image formation fan
motor operates when YC5-1 on the engine PWB goes low. If not,
replace the image formation fan motor.
Run maintenance item U037 and check if YC5-1 on the engine
PWB goes low. If not, replace the engine PWB.
Check for continuity across the coil. If none, replace the develop-
ing duct fan motor.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Run maintenance item U037 and check if the developing duct fan
motor operates when YC5-2 on the engine PWB goes low. If not,
replace the developing duct fan motor.
Run maintenance item U037 and check if YC5-2 on the engine
PWB goes low. If not, replace the engine PWB.
Check for continuity across the coil. If none, replace PWB fan
motor 1 or 2.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
ates when YC2-5 on the fan motors drive PWB goes low. If not,
replace PWB fan motor 1.
ates when YC2-7 on the fan motors drive PWB goes low. If not,
replace PWB fan motor 2.
Run maintenance item U037 and check if YC2-5 or YC2-7 on the
fan motors drive PWB goes low. If not, replace the fan motors
drive PWB.
Run maintenance item U037 and check if YC13-3 on the engine
PWB goes low. If not, replace the engine PWB.
Check for continuity across the coil. If none, replace the power
source fan motor.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Sevice Manual
1-5-63
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