TRAINING MANUAL
WM0742HGA
WM0742HGA Page
50
TRAINING
MANUAL
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, ohm check the
resistors from pin 5 to pin 1 and pin 2. If
the hall sensor is good, you should
measure approximately 10 K
Ω
from pin 5
to pin 1 and 10 K
Ω
from pin 5 to pin 2. If
either test shows an open (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.
Summary of Contents for WM0742HGA
Page 1: ...LG TRAINING MANUAL LG TRAINING MANUAL Steam Washer WM0742H A Fall 2008 ...
Page 29: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 27 TRAINING MANUAL WIRING DIAGRAM ...
Page 32: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 30 TRAINING MANUAL DISPENSER HOSE CONNECTIONS ...
Page 57: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 55 TRAINING MANUAL ERROR CODES continued ...
Page 70: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 68 TRAINING MANUAL MAIN BOARD ...
Page 71: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 69 TRAINING MANUAL EXPLODED VIEW CABINET ASSEMBLY ...
Page 72: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 70 TRAINING MANUAL DRUM and TUB ASSEMBLY ...
Page 73: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 71 TRAINING MANUAL DISPENSER ASSEMBLY ...
Page 81: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 79 TRAINING MANUAL SERVICE BULLETINS ...
Page 82: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 80 TRAINING MANUAL ...
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Page 94: ...Steam Washer Fall 2008 ...