Electrical Problems; The Machine Does Not Operate When The Main Switch Is Turned On; The Drive Motor Does Not Operate; The Scanner Motor Does Not Operate - Kyocera Mita KM-1810 Service Manual

1-5-4 Electrical problems

Problem
(1) No electricity at the power
The machine does outlet.
not operate when
The power cord is not
the main switch is
plugged in properly.
turned on.
The front cover, paper
conveying cover and/or left
cover of the optional
drawer* are/is not closed
completely.
Broken power cord.
Defective main switch.
Blown fuse in the power
source PCB.
Defective safety switch.
Defective ST safety
switch*.
Defective power source
PCB.
(2) Poor contact in the drive
The drive motor motor connector terminals.
does not operate .
Broken drive motor gear.
Defective drive motor.
(3) Broken scanner motor coil.
The scanner motor
does not operate.
Poor contact in the scan-
ner motor connector termi-
nals.
(4) Broken toner feed motor
The toner feed coil.
motor does not
Poor contact in the toner
operate.
feed motor connector ter-
minals.
(5) Broken cooling fan motor
Cooling fan motor coil.
does not operate.
Poor contact in the cooling
fan motor connector termi-
nals.
*: Optional.
Causes
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check the front cover, paper conveying cover and left cover of
the optional drawer*.
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. If none, replace the
safety switch.
Check for continuity across the contacts. If none, replace the ST
safety switch*.
With AC present, check for 5 V DC at CN1-7 on the power
source PCB, 12 V DC at CN1-8 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 drive motor if necessary.
Run maintenance item U030 and check if the drive motor oper-
ates when CN13-5 on the main PCB goes low. If not, replace the
drive motor.
Check for continuity across the coil. If none, replace the scanner
motor.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity across the coil. If none, replace the toner
feed motor.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, repair or replace the cable.
Check for continuity across the coil. If none, replace cooling fan
motor.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, repair or replace the cable.
Check procedures/corrective measures
2A1/2
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