LG WM4070HVA / WM4070HWA Service Manual ▷ View online
42
9-4. PUMP MOTOR ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB
Wiring Diagram
MICOM
IC
R
5V
Rg
Cg
Vdc
Rs
Cs
PCB
CONNECTOR
PUMP
Vac
2
1
4
3
Pump Driving circuit
MAIN PWB
NA2
1 2 3
1
2
3
3 2 1
3 2 1
3 2 1
1
2
3
4
1 2 3 4
BL3
SB
SB
SB
BK
BN
BN
DRAIN
PUMP
PUMP
CIRCULATION
PUMP
PUMP
BK
Object
Function
Test
points
points
Result
* Each circuits of loads in wiring diagram are all same.
Two pump motors are used to drain the tub and to circulate the water / detergent solution.
Drain Pump
Drain Pump
Circulation Pump
Circulation Pump
Test Points
Result
(1) to (2)
10-20
Ω
Test Points
Result
(1) to (2)
18-30
Ω
T.P
For Drain
For Circulation
(1)(2)
(2)
(1)
(1)
(2)
43
9-5. INLET VALVE ASSEMBLY
44
9-6. HEATER ASSEMBLY
1. The wash heater is designed to raise the wash water to the desired temperature
selection during certain wash cycles.
2. The steam generator heater is designed to make the water to the steam during
steam cycles.
Result
Test points
Function
Wering
diagram
diagram
* Each circuits of loads in wiring diagram are all same.
Wash Heater
Wiring diagram
Circuit in the MAIN PWB
Test Points
(1) to (2)
(1) to (2)
12-18
Result
45
9-7. THERMISTOR ASSEMBLY
Circuit in the MAIN PCB / Wiring Diagram
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