53
4-9-3. HALL SENSOR
(3))4()2()1(
- Voltage Testing Hall Sensor from the Main PCB Assembly
1. 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 as your guide.
6. Plug in power cord, close door, and press power button. DO NOT PRESS START!
7. Place meter leads on Brown & Yellow
wires. You should read 10 to 15 Vdc output from the Main
PCB Assembly to the Hall sensor. If no 10 to 15 Vdc is measured the control board is defective.
7. To measure output signal voltage from the hall sensor, carefully move test leads to terminals 1
to 4, blue and gray. Slowly rotate motor rotor by hand. You should read a pulsing 10 Vdc. If 10
Vdc is measured from 1 to 4, move lead on blue wire to
red wire, terminal 2. Repeat rotating
motor rotor by hand. You should read a pulsing 10 Vdc from red to gray.
8. If pulsing 10 Vdc is measured from 1 to 4 and 2 to 4, hall sensor is OK! If either test netted
only 9 to 10 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.
8. Place meters leads on Blue to yellow. Turn motor rotor slowly by hand. You should measure a
pulsing 10 Vdc. Place meter leads on Red to Yellow. Turn motor rotor slowly by hand. You
should measure a pulsing 10 Vdc. If both tests measure a pulsing 10 Vdc, hall sensor and
harness OK. If either or both tests measures 9 to 10 volts, but does not pulse or change, Hall
sensor has failed and must be replac
ed. IF zero (0) voltage is measured on either test, check
red & blue wires for continuity. Repair or replace harness as needed.
Pulsing Signal
Pulsing Signal
Voltage Input
Remarks
ResultTest Points
Pulsing Signal
Pulsing Signal
Voltage Input
Remarks
ResultTest Points
Test
Point
and
Result
(Hall
Sensor)
)8()6()5()7(
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