Electrical Problems; The Desk Feed Clutch Does Not Operate - Kyocera AD-63 Service Manual

1-3-3 Electrical problems

Problem
(1)
The paper feed
desk does not
operate when the
copier print key is
pressed.
(2)
The desk drive
motor does not
operate.
(3)
The desk upper
paper feed clutch
does not operate.
(4)
The desk lower
paper feed clutch
does not operate.
(5)
The desk feed
clutch does not
operate.
Causes
Poor contact of the signal
cable connector terminals
between the paper feed
desk and the copier.
Defective desk safety
switch.
Poor contact of the desk
drive motor connector
terminals.
Broken desk drive motor
gear.
Defective desk drive motor.
Defective desk main PCB.
Broken desk upper paper
feed clutch coil.
Poor contact of the desk
upper paper feed clutch
connector terminals.
Defective desk main PCB.
Broken desk lower paper
feed clutch coil.
Poor contact of the desk
lower paper feed clutch
connector terminals.
Defective desk main PCB.
Broken desk feed clutch
coil.
Poor contact of the desk
feed clutch connector
terminals.
Defective desk main PCB.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector cable. If none, repair or replace the cable.
Check for continuity across the contacts. If none, replace the
desk safety switch.
Reinsert the connector. Also check for continuity within the
connector cable. If none, repair or replace the cable.
Check visually and replace the desk drive motor if necessary.
Check if the desk drive motor operates when CN4-6 on the
desk main PCB goes low. If not, replace the desk drive motor.
Check if CN4-6 on the desk main PCB goes low when the desk
drive motor is operated in maintenance item U247. If not,
replace the desk main PCB.
Check for continuity across the coil. If none, replace the desk
upper paper feed clutch.
Reinsert the connector. Also check for continuity within the
connector cable. If none, repair or replace the cable.
Check if CN1-14 on the desk main PCB goes low when the
desk upper paper feed clutch is operated in maintenance item
U247. If not, replace the desk main PCB.
Check for continuity across the coil. If none, replace the desk
lower paper feed clutch.
Reinsert the connector. Also check for continuity within the
connector cable. If none, repair or replace the cable.
Check if CN1-13 on the desk main PCB goes low when the
desk lower paper feed clutch is operated in maintenance item
U247. If not, replace the desk main PCB.
Check for continuity across the coil. If none, replace the desk
feed clutch.
Reinsert the connector. Also check for continuity within the
connector cable. If none, repair or replace the cable.
Check if CN2-1 on the desk main PCB goes low when the desk
feed clutch is operated in maintenance item U247. If not,
replace the desk main PCB.
3CC
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