LG T8503AEET5 Service Manual ▷ View online
44
4-9-1 TROUBLESHOOTING WITH ERROR
Is the resistance of the
pressure sensor out of
range?
(pin 1~ pin 3)
(21~23
10%)
Replace the
pressure
switch
Is the AIR CHAMBER and the
tube clogged?
Fix the air
chamber
and remove
the foreign
material
Is displayed?
No
Yes
Yes
No
Yes
No
Yes
Replace the MAIN PWB
assembly
PRESSURE SENSOR ERROR
Is the connector connected
to pressure sensor
disconnected or
disassembled?
Reconnect or
repair
the connector
45
4-9-1 TROUBLESHOOTING WITH ERROR
Is
displayed?
Yes
CLUTCH MOTOR ERROR
Is the connector connected to
Sub PWB assembly
disconnected or
disassembled? (NA1)
Reconnect or
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
or not?
Replace
Clutch motor
or sub PCB
or PCB
harness
No
Is the connector connected
clutch to Motor disconnected
or disassembled?
46
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.
Is
three pin wire of
display PWB broken?
Replace the
DISPLAY
PWB
ASSEMBLY
Check the
fuse or reset
the circuit
breaker
NO POWER
Is the supplied voltage
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 )
Alternate with
explanation
Is the connector connected
to PCB/Noise filter
disconnected or
disassembled?
Reconnect
or repair
the
connector
Replace the
MAIN PWB
ASSEMBLY
Is LED on while the power
is on?
CAUTION
47
4-9-1. TROUBLESHOOTING ELSE
Is the button of panel
stuck?
Is the display PCB broken?
(check the buzzer sound
and LED light
while push the button )
Replace the
DISPLAY
PWB
ASSEMBLY
Repair the
button
BUTTON DOESN’T WORK
No
Yes
Yes
Yes
No
Reconnect or
Repair
the connector
Is the connector connected
to Main PWB / Display
PWB disconnected or
disassembled?
Connecting connector
MAIN PWB~ Display PWB
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