Electrical Problems; Power Source Pcb 2 - Kyocera KM-1620 Service Manual

2C9-2

1-5-4 Electrical problems

Problem
(1)
The machine does
not operate when
the power switch is
turned on.
(2)
The drive motor
does not operate
(C2000).
(3)
The registration mo-
tor does not oper-
ate.
(4)
The exit motor does
not operate.
1-5-28
Causes
No electricity at the power
outlet.
The power cord is not
plugged in properly.
The front cover or left
cover is not closed com-
pletely.
Broken power cord.
Defective power switch.
Blown fuse in the power
source PCB.
Defective front or left cover
safety switch.
Defective power source
PCB.
Poor contact in the drive
motor connector terminals.
Broken drive motor gear.
Defective drive motor.
Defective engine PCB.
Poor contact in the regis-
tration motor connector
terminals.
Broken registration motor
gear.
Defective registration mo-
tor.
Defective engine PCB.
Poor contact in the exit
motor connector terminals.
Broken exit motor gear.
Defective exit motor.
Defective engine PCB.
Check procedures/corrective measures
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check the front cover and left 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 and 5 V DC at
YC1-7 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 YC7-5 on the engine PCB goes low. If not, replace
the drive motor.
Run maintenance item U030 and check if YC7-5 on the engine
PCB goes low. If not, replace the engine 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 registration motor if necessary.
Run maintenance item U030 and check if the registration motor
operates when YC2-1,2,4,5 on the registration motor PCB goes
low. If not, replace the registration motor.
Run maintenance item U030 and check if YC4-4 on the engine
PCB goes low. If not, replace the engine 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 exit motor if necessary.
Run maintenance item U030 and check if the exit motor oper-
ates when YC14-1,2,3,4 on the engine PCB go low. If not, re-
place the exit motor.
Run maintenance item U030 and check if YC14-1,2,3,4 on the
engine PCB go low. If not, replace the engine PCB.