Kyocera Mita KM-4530, Service Manual

Page: 188 / 384

2BC/D
1-5-41
1-5-4 Electrical problems
• Copier
Problem Causes Check procedures/corrective measures
(1)
The machine does
not operate when
the main switch is
turned on.
(2)
The image forma-
tion motor does not
operate (C2000).
(3)
Paper feed motor
does not operate
(C2500).
No electricity at the power
outlet.
The power cord is not
plugged in properly.
The front and/or right
cover are/is not closed
completely.
Broken power cord.
Defective main switch.
Blown fuse in the power
source PCB.
Defective safety switch 1
or 2.
Defective power source
PCB.
Poor contact in the image
formation motor connector
terminals.
Broken image formation
motor gear.
Defective image formation
motor.
Defective engine PCB.
Poor contact in the paper
feed motor connector ter-
minals.
Broken paper feed motor
gear.
Defective paper feed mo-
tor.
Defective engine PCB.
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check the front and right covers.
Check for continuity. If none, replace the cord.
Check for continuity across the contacts. If none, replace the
main 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 5 V DC at CN5-12 on the power
source PCB and 24 V DC at CN1-2. 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 image formation motor if neces-
sary.
Run maintenance item U030 and check if the image formation
motor operates when CN15-A3 on the engine PCB goes low. If
not, replace the image formation motor.
Run maintenance item U030 and check if CN15-A3 on the en-
gine 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 paper feed motor if necessary.
Run maintenance item U030 and check if the paper feed motor
operates when CN16-5 on the engine PCB goes low. If not, re-
place the paper feed motor.
Run maintenance item U030 and check if CN16-5 on the engine
PCB goes low. If not, replace the engine PCB.