Pump Motor Assembly - LG WM3988H*A Service Manual

9-4. PUMP MOTOR ASSEMBLY

Wiring
diagram
MICOM
Pump Driving circuit
Object
For Drain
Function Two pump motors are used to drain the tub and to circulate the water / detergent solution.
Test
points
(1)(2)
Result
Circuit in the MAIN PWB
5V
Rg
1 4
R
2 3
IC
CONNECTOR
* Each circuits of loads in wiring diagram are all same.
Drain Pump
Drain Pump
Test Points Result
10-20 Ω
(1) to (2)
Vdc
Cg
Rs
Vac
Cs
PCB
PUMP
For Circulation
Circulation Pump
(1)
(2)
Circulation Pump
Test Points
(1) to (2)
44
Wiring Diagram
MAIN PWB
BL4 BL3
1 2 3 4 1 2 3
1 2 3 4 1 2 3
BN BK SKY
3 2 1
SB
3 2 1
BK
SB
BN
DRAIN CIRCULATION
PUMP PUMP
T.P
(1) (2)
Result
18-30 Ω