Read LG 29278 Service Manual online
33
1) Washer is not energized.
Where, what, and how to check
Result of Check
Possible Cause
How to repair
Household Power supply
1. Check the cord, plug, and outlet.
2. Measure the voltage at the outlet.
Wiring of the Washer
1. Measure resistance between both ends
of the power supply cord with both the
plug pins short-circuited.
plug pins short-circuited.
2. Check every connector for a loose
connection.
3. Check resistance of every wire to find
out a open wire.
Electrical component
1. Check resistance with power relay
switch turned on
2. Check the secondary voltage of the
transfomer.
3. Check for blown fuse.
Controller
If all the components test good, the defect
is likely the main control board.
is likely the main control board.
Poor
120 VAC ± 10%
0 V
Less than 1
Ω
∞Ω
Male & female
connectors separated
connectors separated
∞Ω
Less than 0.5
Ω
More than 1.0
Ω
10~14 V
0 V
Open
Over 120% voltage
than rating check
than rating check
Electrical defect.
No defect
Defect of household
power supply
power supply
No defect
Open circult of the power
supply cord
supply cord
Poor connection
Wire is opened.
No defect
Poor contact
No defect
Coil is open
Blown fuse
Note: US appliances are
120 VAC except for
stoves, ranges, ovens,
cooktops, and certain air
conditioners.
Note: US appliances are
120 VAC except for
stoves, ranges, ovens,
cooktops, and certain air
conditioners.
Repair or replace as
necessary.
necessary.
Call for power supply
company
company
Change the power supply
cord.
cord.
Unplug and re-insert the
connector.
connector.
Change the lead wire
Change the AUTO OFF
Switch
Switch
Replace the transformer.
Change the fuse.
CAUTION
Check the fuse rating.
125 VAC 12 AMPS
CAUTION
Check the fuse rating.
125 VAC 12 AMPS
Replace the main board if all
the electrical components
test good.
the electrical components
test good.
4-6. HOW TO DIAGNOSE AND REPAIR BY SYMPTOM
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