LG DLGX3371W Service Manual page 31

Not tumbling
Case1. Motor doesn't operate at all.
Case2. Motor operates but stops soon.
Power on, press the start
button.
Display status is 'Pause'?
Start/Pause Button
Blinking
No
When the door is closed, door light
is still on?
No
Unplug UNIT /
Is resistance less than 3Ω
Between connetors?
Note : Measure while door is
closed
No
Unplug UNIT /
Does belt switch attached to
Motor braket operate lever by
Drum belt?
(Not operating Lever is Normal)
No
Go to
Check the door
is not closed
Yes
properly.
Check the door
Switch and hous-
Yes
ing.
Is the voltage
120Vac during a
Yes
cycle.
-. No:defect PCB
-. Yes: Unit good
CAUTION:
Potential for
voltages over
100Vac. Proceed
with care.
Check belt switch
-.Drum belt cuts
Yes
off
-.Drum belt takes
off from motor.
Unplug UNIT / Check belt switch
1.Lever open
Resistance value 1Ω
2.Lever push (Close)
Resistance value ∞
Yes
Unplug UNIT /
Test Outlet thermostat
Open at 185 ± 41
(85 ± 5 ) ∞
Close - Not recovery < 5Ω
Yes
Unplug UNIT / Check Motor
Are motor readings normal?
Main-Common
= 4.35Ω±5%(at 75 )
Sub-Common
= 3.37Ω±5%(at 75 )
Yes
Is belt not connected well on the
pulley?
Is the black dust on the shaft and
under the shaft?
No
Retest / recheck door switch, outlet
thermostat, belt switch, motor as-
sembly, harness.
31
Defective Belt
Switch
No
Defective Outlet
thermostat
No
Defective Motor
No
Check belt
-.Drum belt cuts
off
-.Drum belt takes
off from motor.
Yes