WM2277 WASHER PAGE 32 of 84 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 29.)
1. Unplug the power cord.
2. Remove the rear panel.
3. Remove the top plate.
4. Remove the main board from the rear cabinet corner.
5. Remove the main board cover, as shown on page 29.
6. Locate the hall sensor connector (white, 4-pin) using the wiring diagram
and wire colors as your guide. (See wiring diagram and main board photo,
page 45.)
7. Plug in the power cord, close the door, and press POWER.
8. DO NOT PRESS START!
9. Place your meter leads on the WHITE and GRAY wires. You should read
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.
10. 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.
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