DOWNLOAD LG 55LM860V (CHASSIS:LD23E) Service Manual ↓ Size: 11.68 MB | Pages: 117 in PDF or view online for FREE

1. Press the Setting button on the remote controller

2. Select the Sound function of the Menu

3. Select the Sound Setting

4. Select TV Speaker from Off to On

<ALL MODELS>

① Check the contact condition of or 24V connector of Main Board

② Measure the 24V input voltage supplied from Power Board

(If there is no input voltage, remove and check the connector)

③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the 
GND and output terminal, the speaker is normal. 

①

②

③

②

24 Pin

 

(Power Board ↔ Main Board) 

1

Power on

2

24V

3

24V

4

24V

5

GND

6

GND

7

GND

8

GND

9

3.5V

10

3.5V

11

3.5V

12

3.5V

13

GND

14

GND

15

GND

16

V-sync

17

12V

18 Inverter On/off

19

12V

20

N.C

21

12V

22 PWM Dim #1

23 PWM Dim #2 24

Error-out

<XXLM9600>

Checking order

1, 2.  Check IR cable condition between IR & Main board.
3.      Check the st-by 3.3V on the terminal 6.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when the 

Analog Tester needle moves slowly, and defective when it does not move at all. 

<XXLM9600>

P4102

1

SCL

2

SDA

3

GND

4

KEY1

5

KEY2

6

St 3.5V

7

GND

8

GP4_LED_R

9

IR

10

GND

①

②

③

④

Checking order

1, 2.  Check Motion cable condition between Motion assy & Main board.
3.      Check the 3.3V on the terminal 1.

P4800

1

3.3V

2

GND

3

RX

4

TX

5

RESET

6

DC

7

DD

8

GND

①

②

③

<XXLM9600>