LG WT4870CW Service Manual ▷ View online
5-5. INLET VALVE ASSEMBLY
45
Wiring
diagram
Function
Test
points
and
Result
Circuit in the MAIN PCB
Wiring diagram
INLET VALVE
Inlet valve driving circuit
Depending on the cycle and water temperature, the controller will energize the hot or cold water
valve solenoids to meet the selected water temperature.
After unplugging the connector of the defective valve, check the resistance.
(1) (2)
(2)
(2)
(2)
(2)
(1)
(1)
(1)
(1)
* All valves operate at 13.5 VDC.
Test
Points
(1)-(2)
Result
24±10% [Ω]
5-6. THERMISTOR ASSEMBLY
46
Wiring
diagram
Function
Test
points
Circuit in the MAIN PCB / Wiring Diagram
Wash Thermistor
The thermistor (temperature sensor) is used to monitor water temperature in the tub.
MAIN PCB
(2)
(1)
47
Result
Wash Thermistor
The lowest
limit
standard The upper
limit
70.519
46.997
22.285
15.803
46.997
22.285
15.803
6.984
5.180
5.180
76.531
50.584
23.623
16.635
50.584
23.623
16.635
7.471
5.573
5.573
82.848
54.307
24.978
17.467
54.307
24.978
17.467
7.971
5.981
5.981
Test Points
(1) to (2)
Remarks
Result [㏀]
At 86℉ (30℃)
At 104℉ (40℃)
At 140℉ (60℃)
At 158℉ (70℃)
At 203℉ (95℃)
At 140℉ (60℃)
At 158℉ (70℃)
At 203℉ (95℃)
At 221℉ (105℃)
6. EXPLODED VIEW
48
BODY-A
BODY-B
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