LG WM3001HRA - Hall Sensor Testing Specifications

TRAINING MANUAL WM3001H*A
WM3001H*A Page 81 Washer
Terminal Designation / Ohm & Voltage Specifications
Part No. 6501KW2002A
Hall Sensor Testing
The hall sensor can be tested from the
control board or at the hall sensor.
Ohm Testing the Hall Sensor
If tested off the stator using the diagram
on the previous page, check the resistors
from pin 5 to pin 1 and pin 2. If the hall
sensor is good, you should measure
approximately 10 K from pin 5 to pin 1
and 10 K from pin 5 to pin 2. If either
test shows an open circuit (infinity), the
hall sensor is defective and must be
replaced.
Voltage Testing Hall Sensor at Stator
If measuring voltage from the control board to the hall sensor, follow the
following steps:
1. Unplug the power cord.
2. Remove the rear washer panel.
3. Locate the Hall sensor connector on the stator behind the rotor.
4. Place the meter leads on terminals 5 to 4, white to gray.
5. Plug in the power cord, close the door, and press the power button.
DO NOT PRESS START!
6. You should measure 10 to 15 V
DC
. If 10 to 15 V
DC
is present, the control board
is OK! If not, follow the testing output voltages on control board in next section.
7. To measure output signal voltage from the hall sensor, carefully move test leads
to terminals 4 (gray) to 1 (blue). Slowly rotate the motor rotor by hand. You
should read a pulsing 10 V
DC
. If 10V
DC
is measured from 4 to 1, move the lead on
the blue wire to the red wire, terminal 2. Repeat rotating motor rotor by hand.
You should read a pulsing 10 V
DC
.
8. If pulsing 10 V
DC
is measured from pin 4 to pin 1 and pin 4 to pin 2, the hall
sensor is OK! If either test netted only 9 to 10 V
DC
without changing (no
pulsing) the hall sensor is likely defective. Disconnect power by unplugging the
washer. Ohm check the hall sensor as outlined in Ohm Testing The Hall Sensor
(see above) to verify failure of the hall sensor.