How To Diagnose And Repair By Symptom - LG WTG7532W Service Manual

4-6. HOW TO DIAGNOSE AND REPAIR BY SYMPTOM

1) Washer is not energized.
Where, what & how to check?
Household Power supply
1. Che ck whether connection between the
plug and the electrical is poor
2. Measure voltage of the electrical.
Wiring of the Washer
1. Measure resistance between both ends
of the power suppl y cord with both the
plug pins s hort-circuited.
2. Che ck whether every connector in the
bundle of connectors has a good
connection.
3. Che ck resistance of every wire to find
out a open wire.
Electrical component
1. Che ck resistance with power relay
switch turned on
2. Che ck the secondary voltage of the
transfomer.
3. Che ck whether the fuse is open.
Controller
If there are no defects in the above,
it should be defect of the controller.
Re sult of Check
Poor Defect of the electrical
Around rating No defect
0 V Defect of household
power suppl y
No defect
Less than 1
Open circult of the power
∞
suppl y cord
Poor connection
Male & female
connectors s eparated
Wire is opened.
∞
Less than 0.5
No defect
More than 1.0
Poor contact
10~14 V No defect
0 V
Coil is open
Defect of the fuse
Open
Over 120% voltage
than rating check
43
Poss ible Cause
Change the electrical.
Call for power suppl y
company
Change the power suppl y
cord.
Re move the cause to give
strain and reconnect
them.
Change the lead wire
Change the AUTO OF F
S witch
Change the
transfomerformer.
Change the fuse.
CAUTION
Check the fuse rating
AC100~127V:125V 12A
AC220~240V:250V 6A
Change the controller if all
the electrical parts have no
defects.
How to repair & s ett le