DOWNLOAD LG F12A8HD / F12A8HD5 Service Manual ↓ Size: 17.82 MB | Pages: 55 in PDF or view online for FREE

BL

BR

YL

1

8

NA

2

3

3

R
D

5

NA

1

Y
L

6

3

1

3

5

2

B
L

1

NOISE FILTER

NA

NA

8

1

3

9

8

5

G
R

2

GR/
YL

3

5

4

8

2

Y
L

7

CON4-1

2

2

O
R

nly

B
L

1

FUSE

Power

2

1

7

4

4

2

4

RD-1

Black

1

3

POWER CORD

6

5

R
D

4

2

1

1

3

1

2

V
L

5

BL

B
L

1

GR
/
YL

RD

O
R

Yellow

3

B
L

4

B
L

4

BL

6

7

4

4

3

6

FUSE

R
D

1

Y
L

2

4

3

6

1

1

RD

3

4

WASHING

5

Heater

2

6

3

Tap Relay

R
D

HEATER

3

2

NATURE

3

BL

W
H

2

Buzzer

Display POWER

YL

G
R

BR

Main PWB&DISPLAY PWB
DATA LINKER

9

7

3

2

Y
L

5

DISPLAY 

1

2

4

B
R

B
R

70

171

321

302

Tap Relay

320

171

02

43

320

BL

BL

43

60

BL

Wiring Diagram 3/3

PCB Layout (Main)

LCD Display

LCD Display

Circulation Pump

LCD Display

LCD Display

AG SENSOR

Measure R impossible
here Just Check cut-off

LCD Display

LCD Display

Hall Sensor Control

LCD Display

LCD Display

Thermistor

LCD Display

LCD Display

Motor Stator Control

V ~ U / U ~ W
/ W ~ V

R : 8 ~11Ω

W  

U  

V

LCD Display

LCD Display

PCB POWER

LCD Display

LCD Display

AG

LCD Display

LCD Display

LCD Display

LCD Display

LCD Display

Vibraion sensor Control

LCD Display

LCD Display

Heater

LCD Display

LCD Display

Display Power

Pressure Switch

&

Aqua stop

&

Measure Hz impossible

Here. Just Check cut-off

Common

Main Valve

3.5~4.5kΩ

Pre Valve

3.5~4.5kΩ

AG Valve

3.5~4.5kΩ

Short

Common

Common

Common

Hb

(5~15KΩ)

Aqua 

stop

Long

LCD Display

LCD Display

Inlet Valve Control

Door S/W

&

DrainPump

Thermistor for wash

Ciculation

Pump

(152~176Ω)

Door

S/W

Drain

Pump

(152~176Ω)

Thermistor for AG

Program Chart

Before servicing ask the customer what the trouble is.
Check the adjustments. (Power supply :220-240V~, Removal of transit bolts etc..)
Check the troubles referring to the troubleshooting.
Decide service steps referring to disassembly instructions.
Then, service and repair.
After servicing, operate the appliance to see whether it works OK or NOT.

7. TROUBLESHOOTING

7-1. BEFORE SVC CHECKING

7-2. LOAD TEST MODE

1 Press and Hold ‘

Option (Right)

’ & ‘

Rinse

’ buttons

and then press ‘

Power

’ button.

2 The washer must be empty and the controls must be in the off state.
3 Press Power with above two buttons pressed and then buzzer will sound.
4 Press the Start/Pause button repeatedly to cycle through the test modes

1
2
3
4
5
6

None 

1 time 

2 times 

3 times 

4 times 

5 times 

6 times 

7 times 

8 times 

9 times 

10 times 

11 times 

12 times 

13 times 

14 times 

Turns on all lamps and locks the door.

Tumble clockwise.

Low speed Spin.

High speed Spin.

Inlet valve for prewash turns on.

Inlet valve for main wash turns on.

Inlet valve for hot water turns on.

Inlet valve for steam turns on.

Inlet valve for bleach turns on.

Heater turns on for 3 sec.

Circulation pump turns on.

Drain pump turns on.

Water level Sensor for Steam

Steam Heater turns on for 1.2 sec.

Off

rpm (42~50)

rpm (55~65)

rpm (125~155)

Water level frequency (25~65)

Water level frequency (25~65)

Water level frequency (25~65)

Water level frequency (25~65)

Water level frequency (25~65)

Water temperature

Water level frequency (25~65)

Water level frequency (25~65)

Water level frequency of TSG (0~255)

TSG temperature

-

Number of times the

Start/Pause button is pressed

Check Point

Display Status

1100

1200