LG F14A8RDS Series Service Manual page 51

7. To measure output signal voltage from the hall sensor, carefully move test
8. If pulsing 0 Vdc is measured from to 4 and 2 to 4, hall sensor is OK! If either
- Voltage esting Hall Sensor from the Main PCB Assembly
est Point
and
Result
(Hall
Sensor)
. Unplug power cord.
2. Remove rear panel.
3. Remove Washer Top.
4. Remove Main PCB Assembly cover as shown in Figure below.
5. Locate the white Hall Sensor 4 wire connector using wiring diagram wire colors
6. Plug in power cord, close door, and press power button. DO NOT PRESS
7. Place meter leads on White & Gray wires. You should read 0 to 5 Vdc output
8. Place meters leads on Blue to Gray. Turn motor rotor slowly by hand. You
leads to terminals to 4, blue and gray. Slowly rotate motor rotor by hand.
You should read a pulsing 0 Vdc. If 0 Vdc is measured from to 4, move
lead on blue wire to red wire, terminal 2. Repeat rotating motor rotor by hand.
You should read a pulsing 0 Vdc from red to gray.
test netted only 9 to 0 Vdc without changing (no pulsing) the hall sensor is
likely defective. Disconnect power by unplugging washer and ohm check hall
sensor to verify failure of the hall sensor.
as your guide.
START!
from the Main PCB Assembly to the Hall sensor. If no 0 to 5 Vdc is
measured the control board is defective.
should measure a pulsing 0 Vdc. Place meter leads on Red to Gray. Turn
motor rotor slowly by hand. You should measure a pulsing 0 Vdc. If both tests
measure a pulsing 0 Vdc, hall sensor and harness OK. If either or both tests
measures 9 to 0 volts, but does not pulse or change, Hall sensor has failed
and must be replaced. IF zero (0) voltage is measured on either test, check red
& blue wires for continuity. Repair or replace harness as needed.
Test Points
( ) to (2)
( ) to (3)
( ) to (4)
(2) to (4)
(3) to (4)
Result Remarks
8- 2 k
8- 2 k
0- 5 Vdc Voltage Input
Pulsing Signal
0 Vdc
0 Vdc Pulsing Signal
51
(1)
(2)
(3)
(4)