TRAINING MANUAL
WM0742HGA
WM0742HGA Page
52
TRAINING
MANUAL
Actual Terminal Wiring
The potting epoxy has been
removed to show the PC board
and components.
Voltage Testing Hall Sensor at Control Board (See page 50.)
1.
Unplug the power cord.
2.
Remove the rear control panel cover.
3.
Remove the top plate.
4.
Remove the main board from the rear cabinet corner.
5.
Identify the hall sensor connector on the main board, as shown on page 68, using
the wiring diagram and wire colors as your guide. (See wiring diagram and main
board photo, page 68.)
6.
Plug in the power cord, close the door, and press POWER.
DO NOT PRESS
START
!
7.
Place your meter leads on the WHITE and GRAY wires. You should read between
10
~
15 V
DC
output from the main board to the hall sensor. If 10
~
15 V
DC
are
not observed, the main board is defective.
8.
Place your meter leads on the BLUE and GRAY wires. Turn the motor rotor slowly
by hand. You should measure a pulsing 10 V
DC
. Place your meter leads on the
RED and GRAY wires. Turn the motor rotor slowly by hand. You should measure a
pulsing 10 V
DC
.
If both of these tests measure a pulsing 10 V
DC
, the hall sensor and wiring
harness are OK. If either or both tests measures 9
~
10 V
DC
but does not pulse
or change, the hall sensor has failed and must be replaced.
If either test measures 0 (zero) voltage, check the red and blue wires for
continuity. Repair or replace the wiring harness as necessary.
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 ...
Page 83: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 81 TRAINING MANUAL ...
Page 84: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 82 TRAINING MANUAL ...
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Page 94: ...Steam Washer Fall 2008 ...