WD-10391TD, WD-10391TDK, WD-10391TDP, WD-10721MDX - LG Washing Machine Service Manual (repair manual). Page 22

AC 220-240V

PWB ASSEMBLY (MAIN)

PWB ASSEMBLY (MAIN)

Replace the sensor 
(pressure)

Replace the PWB
assembly  

Repair drain hose

Remove foreign
material.

Reconnect or repair the
connector

Replace the pump
assembly

Replace the PWB
assembly (Main) 

When pressing [Intensive] button and 
[Crease Care] button at the same time after draining, 
is  the water level frequency 252 or more?  
When pressing [Intensive] button and 
[Crease Care] button at the same time while wash,
is the water level frequency between 230~245~?

Checking voltage between two [Yellow(RD), 
Black(YL)]pins as press the power button is  
the voltage 220 - 240V~ in without water 
condition

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

)

When checking voltage between connectors
(

,  ) on spinning, is the voltage 

220 - 240V~  as the figure?