Kyocera PF-760, Service Manual

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5H8
1-4-7
1-4-3 Electric problems
Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem Causes Check procedures/corrective measures
(1)
The paper feeder
does not operate
when the main power
switch is turned on. 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)
The PF paper con-
veying 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 the gear. Check visually and replace the gear if necessary.
3. Defective PF paper con-
veying motor.
Run maintenance item U247 and check if the PF paper conveying
motor operates when CN2-2 on the PF main PWB goes low. If not,
replace the paper feeder paper conveying motor.
4. Defective PF main PWB. Run maintenance item U247 and check if CN2-2 on the PF main
PWB goes low. If not, replace the PF main PWB.
(3)
The PF lift motor 1/2
does not operate. 1. Broken motor coil. Check for continuity across the coil. If none, replace the 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 PF main PWB. Check if CN7-13 or CN7-6 on the PF main PWB goes low right
after the cassette is installed. If not, replace the PF main PWB.
(4)
The PF paper feed
clutch 1/2 or PF
paper conveying
clutch does not oper-
ate. 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 PF main PWB. Run maintenance item U247 and check if following terminals on
the PF main PWB goes low. If not, replace the PF main PWB.
PF paper feed clutch 1: CN4-3
PF paper feed clutch 2: CN4-1
PF paper conveying clutch: CN4-5
PF separation clutch: CN4-7
Y1120 3 0- 5 Service Manual