Kyocera AD-63, Service Manual

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2FD/2FF/2FG
1-5-46
1-5-4 Electrical problems
Problem Causes Check procedures/corrective measures
(1)
The machine does
not operate when
the power switch is
turned on.
(2)
The drive motor
does not operate
(C2000).
(3)
The paper feed mo-
tor does not operate
(C2500).
(4)
The eject motor
does not operate.
No electricity at the power
outlet.
The power cord is not
plugged in properly.
The front cover, conveying
cover and/or side cover
are/is not closed com-
pletely.
Broken power cord.
Defective power switch.
Blown fuse in the power
source PCB.
Defective safety switch 1
or 2.
Defective power source
PCB.
Poor contact in the drive
motor connector terminals.
Broken drive motor gear.
Defective drive motor.
Defective main PCB.
Poor contact in the paper
feed motor connector ter-
minals.
Broken paper feed motor
gear.
Defective paper feed mo-
tor.
Defective main PCB.
Poor contact in the eject
motor connector terminals.
Broken eject motor gear.
Defective eject motor.
Defective eject switch.
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check the front cover, conveying cover and side cover.
Check for continuity. If none, replace the cord.
Check for continuity across the contacts. If none, replace the
power switch.
Check for continuity. If none, remove the cause of blowing and
replace the fuse.
Check for continuity across the contacts of each switch. If none,
replace the switch.
With AC present, check for 24 V DC at YC1-1, 3.4 V DC at YC1-
6 and YC1-7, 5.1 V DC at YC1-9 on the power source PCB. If
none, replace the power source PCB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check visually and replace the drive motor if necessary.
Run maintenance item U030 and check if the drive motor oper-
ates when YC11-9 on the main PCB goes low. If not, replace the
drive motor.
Run maintenance item U030 and check if YC11-9 on the main
PCB goes low. If not, replace the main PCB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check visually and replace the paper feed motor if necessary.
Run maintenance item U030 and check if the paper feed motor
operates when YC11-10 on the main PCB goes low. If not, re-
place the paper feed motor.
Run maintenance item U030 and check if YC11-10 on the main
PCB goes low. If not, replace the main PCB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check visually and replace the eject motor if necessary.
Run maintenance item U030 and check if the eject motor oper-
ates when YC16-B11, YC16-B12, YC16-B13 and YC16-B14 on
the main PCB go low. If not, replace the eject motor.
Run maintenance item U031 and turn the eject switch on and off
manually. Replace the switch if indication of the corresponding
switch on the operation panel is not displayed in reverse.