LG 48842800 Service Manual ▷ View online
36
9-4. PUMP MOTOR ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB
Wiring Diagram
MICOM
IC
R
5V
Rg
Cg
Vdc
Rs
Cs
PCB
CONNECTOR
PUMP
Vac
2
1
4
3
Pump Driving circuit
MAIN PWB
1
2
3
1
2
3
BL1
SB
BK
BN
DRAIN
PUMP
PUMP
1
2
3
1
2
3
Object
Function
Test
points
points
Result
* Each circuits of loads in wiring diagram are all same.
Two pump motors are used to drain the tub and to circulate the water / detergent solution.
Drain Pump
Drain Pump
Test Points
Result
(1) to (2)
10-20
Ω
T.P
For Drain
(1)(2)
(1)
(2)
37
9-5. INLET VALVE ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB
INLET
VALVE
VALVE
Vac
Rs
Vdc
Cg
Rg
IC
MICOM
Cs
PCB
CONNECTOR
Inlet valve driving circuit
Function
Test
points
points
and
Result
Depending on the cycle and water temperature, the controller will energize the hot or cold
water valve solenoids to meet the selected water temperature.
water valve solenoids to meet the selected water temperature.
After pull out the connector of defective valve, check the resistance.
Test points
(1)-(2)
Result
0.8-1.2 k
Ω
Wiring Diagram
PRE
WASH
MAIN
WASH
BLEACH
SOFTNER
1
2
1
2
1
2
1
2 BL
NA
NA
BL
WH
GY
BL
NA
OR
WH
WH
BL
4
3
2
1
1
2
3
1
2
3
4
3
2
1
4
3
2
1
4
3
2
1
COMMON
(BK)
(BK)
MIAN PWB
INLET VALVE
HOT
VALVE
1
2
RD
* Each circuits of loads in wiring diagram are all same.
(1) (2)
(1)
(2)
(1)
(2)
(2)
(1)
(2)
(1)
38
9-6. HEATER ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB
MICOM
12V
Heater
Vac
43
43
Tab Relay
Heater driving circuit
Wiring diagram
MAIN PWB
X133(BK)
2 1
2 1
1 2
1 2
3 2
3 2
1
1
X71(WH)
WH
YL
GN
/
YL
BN
BL
BN
WASHING
HEATER
HEATER
Vac
FUSE
FUSE
Function
Test
points
&
Result
1. The Wash Heater is designed to raise the wash water to the desired temperature
selection during certain wash cycles.
Wash Heater
* Each circuits of loads in wiring diagram are all same.
(1)
(2)
Wash Heater
Test Points
Result
(1) to (2)
12-18 Ω
39
9-7. THERMISTOR ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB / Wiring Diagram
MAIN PWB
MICOM
NA
BL
WH
1
2
WASH
THERMISTOR
3
4
5
6
1
5V
5V
R
R
R
R
C
C
C
C
2
3
4
5
6
Function
Test
points
points
The thermistor (temperature sensor) is used to monitor water temperature in the tub
or Steam Generator.
or Steam Generator.
Wash Thermistor
Test
Points
(1)
to
(2)
Result
(tolerance ±5%)
50 k
Ω
39.2 k
Ω
15.2 k
Ω
6.6 k
Ω
3.1 k
Ω
2.2 k
Ω
Remarks
At 77°F (25°C)
At 86°F (30°C)
At 122°F (50°C)
At 158°F (70°C)
At 194°F (90°C)
At 212°F (100°C)
(1) (2)
Click on the first or last page to see other 48842800 service manuals if exist.