WD-8070FB, WD-8074FB - LG Washing Machine Service Manual (repair manual). Page 26

PWB ASSEMBLY (MAIN)

PWB ASSEMBLY (MAIN)

2

1

(5)

(6)

Repair drain hose.

Remove foreign material.

Reconnect or repair the
connector.

Replace the pump
assembly.

Replace the PWB

assembly (Main) .

Is the drain hose twisted or frozen?

Is the impeller of the drain pump clogged?

Is the connector disconnected, disassembled?

Is the coil of drain pump cut-off?

(resistance of coil is 90~160

Ω)

When checking voltage between connectors

( ,  ) on spinning, is the voltage 220 - 240V~ 

as the figure?

Repair drain hose.

Remove foreign material.

Reconnect or repair the
connector.

Replace the pump
assembly.

Replace the PWB

assembly (Main).

Is the drain hose kinked or frozen?

Is the filter of drain pump clogged?

Is the connector disconnected or is the contact
bad?

Is the coil of drain pump cut-off?
(resistance of coil is 90~160 )

When checking voltage between two receptacles
as shown ( ,  ) on spinning, is the voltage 

220-240V ?

■ WD(M)-8070F(H)B, WD(M)-1070(5)F(H)B, WD(M)-1170(5)F(H)B, WD(M)-1270(5)F(H)B, WD(M)-1370(5)F(H)B 

WD(M)-8074F(H)B, WD(M)-1074(6)F(H)B, WD(M)-1174(6)F(H)B, WD(M)-1274(6)F(H)B, WD(M)-1374(6)F(H)B
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)

■ WD-8070F(H), WD-1070(5)F(H)