Control Board Testing Location - LG WM0742H Series Training Manual

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TRAINING MANUAL

Testing the Hall Sensor from the Control Board

Control Board Output and Hall Sensor Input can be measured with the connector

connected to the board and the machine operating. Also, these voltages can be

measured by parking the meter leads on the desired terminals and spinning the tub

briskly with the power cord disconnected.

• White to Gray – 10 to 15 V

• Gray to Blue – pulsing 10 V

• Gray to Red – pulsing 10 V

Note: If 10 V

from gray-to-blue or gray-to-red does not change (pulse), that resistor

is open! Confirm by disconnecting the power, disconnecting the hall sensor connector on

the main board, and ohm checking that individual circuit!

With power disconnected and the connector disconnected, the hall sensor can be tested

ohmmetrically from:

• White to Blue – 10 KΩ

• White to Red – 10 KΩ

Note: Ohm values are approximate; if either ohm check shows an open, the wire harness

is open or the hall sensor is defective. Test both separately to determine the exact

location of the failure!

WM0742HGA