LG WM8500HVA / WM8500HWA Service Manual ▷ View online
37
9-3. STATOR ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB / Wiring Diagram
MAIN PWB
MICOM
Ha
12V
NA1NA
WH
WH
GND
MOT
OR
Hb
Ha
Ha
RD
RD
BL
BL
BL
GY
GY
YL
w
w
v
u
v
u
u
BL
RD
RD
RD4
IPM
GY
YL
w
u
v
u
v
BL
RD
RD
1
1 1
2
3
4
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
3
2
2
2
1
1
3
4
1
2
3
4
5
1
2
3
4
5
2
3
4
3
4
1
2
3
4
2
3
4
Hb
Function
Test points
(Windings)
(Windings)
Result
(Windings)
(Windings)
The Direct Drive motor can be driven from stopped to maximum speed in infinite
steps in either direction.
There are 36 poles on the stator; 12 permanent magnets spaced around the rotor.
There are no brushes to wear out. Unlike a more traditional brushless motor, the
rotor surrounds the stator rather than being attached to it.
steps in either direction.
There are 36 poles on the stator; 12 permanent magnets spaced around the rotor.
There are no brushes to wear out. Unlike a more traditional brushless motor, the
rotor surrounds the stator rather than being attached to it.
Test Points
Result
(1) to (2)
(2) to (3)
(3) to (1)
5-15
Ω
5-15
Ω
5-15
Ω
WINDINGS
HALL SENSOR
(1)
(2)
(3)
38
Test point
and
Result
(Hall
(Hall
Sensor)
The hall sensor determines the speed and direction of the motor.
It also can read that the load is off balance when the drum speed fluctuates.
It also can read that the load is off balance when the drum speed fluctuates.
- Voltage Testing Hall Sensor at Stator
If measuring voltage from the Main PCB Assembly to the Hall Sensor, use the
following steps:
1. Unplug power cord.
2. Remove rear washer panel.
3. Locate Hall sensor connector on the stator behind the rotor.
4. Place meter leads on terminals 5 to 4, white to gray.
5. Plug in power cord, close door, and press power button.
following steps:
1. Unplug power cord.
2. Remove rear washer panel.
3. Locate Hall sensor connector on the stator behind the rotor.
4. Place meter leads on terminals 5 to 4, white to gray.
5. Plug in power cord, close door, and press power button.
DO NOT PRESS START!
6. You should measure 10 to 15 V
DC
. If 10 to 15 V
DC
is present, control board,
white wire, and gray wire are OK! If not, follow testing output voltages on
control board in next section.
control board in next section.
(1) (3) (5)
(2) (4)
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