WD-12175TD - 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 [Option(Pre Wash/Crease Care)]
and [Time Delay] at the same time after draining, 
is  the water level frequency 252 or more?  
When pressing [Option(Pre Wash/Crease Care)],
[Time Delay] buttons at the same time while wash,
is the water level frequency between 230~245~?

Checking voltage between two pins as press
the power button is the voltage 
220 - 240V~ ?

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?