LG XQB105-V3D Service Manual ▷ View online
4 8
4-9-1 TROUBLESHOOTING WITH ERROR
Is
displayed?
Yes
CLUTCH MOTOR ERROR
Is the connector connected to
Sub PWB assembly
disconnected or
disassembled? (NA1)
Sub PWB assembly
disconnected or
disassembled? (NA1)
Reconnect or
repair
the connector
repair
the connector
Yes
No
- Part of wire
Motor Drive
Hall Sensor
- Part of Clutch
Turn on WM and operate
check clutch motor Is it spin
check clutch motor Is it spin
or not?
Replace
Clutch motor
or sub PCB
or PCB
harness
Clutch motor
or sub PCB
or PCB
harness
No
Is the connector connected
clutch to Motor disconnected
or disassembled?
clutch to Motor disconnected
or disassembled?
4 9
4-9-1 TROUBLESHOOTING ELSE
1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
Is three pin wire of
display PWB broken?
display PWB broken?
Replace the
DISPLAY
PWB
ASSEMBLY
DISPLAY
PWB
ASSEMBLY
Check the
fuse or reset
the circuit
breaker
fuse or reset
the circuit
breaker
NO POWER
Is the supplied voltage
120V AC?(+10%, -15%)
120V AC?(+10%, -15%)
Yes
No
No
No
Yes
Yes
No
Yes
No
Display PWB
Connecting connector
MAIN PWB~ Display PWB
Is the current rating of
multi-outlet
power strip enough?
(Avoid connecting several
electric devices )
multi-outlet
power strip enough?
(Avoid connecting several
electric devices )
Alternate with
explanation
explanation
Is the connector connected
to PCB/Noise filter
disconnected or
disassembled?
to PCB/Noise filter
disconnected or
disassembled?
Reconnect
or repair
the
connector
or repair
the
connector
Replace the
MAIN PWB
ASSEMBLY
MAIN PWB
ASSEMBLY
Is LED on while the power
is on?
is on?
CAUTION
50
4-9-1. TROUBLESHOOTING ELSE
Is the button of panel
stuck?
stuck?
Is the display PCB broken?
(check the buzzer sound
and LED light
while push the button )
(check the buzzer sound
and LED light
while push the button )
Replace the
DISPLAY
PWB
ASSEMBLY
DISPLAY
PWB
ASSEMBLY
Repair the
button
button
BUTTON DOESN’T WORK
No
Yes
Yes
Yes
No
Reconnect or
Repair
the connector
Repair
the connector
Is the connector connected
to Main PWB / Display
PWB disconnected or
disassembled?
to Main PWB / Display
PWB disconnected or
disassembled?
Connecting connector
MAIN PWB~ Display PWB
51
4-10. COMPONENT TESTING INFORMATION
When Resistance (Ohm) checking the Component, be sure to turn the power off,
and do voltage discharge sufficiently.
and do voltage discharge sufficiently.
4-10-1. FILTER ASSEMBLY (LINE FILTER)
WH
0
ȳ
YL to RD
0
ȳ
WH to BL
Result
Test Points
0
ȳ
YL to RD
0
ȳ
WH to BL
Result
Test Points
Circuit in the MAIN PWB / Wiring Diagram
Wiring
diagram
diagram
Test
points
points
and
Result
(1)
(3)
BL
YL
RD
INPUT
OUTPUT
WARNING
Click on the first or last page to see other XQB105-V3D service manuals if exist.