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Checking order

1. Check IR cable condition between IR & Main board.(Check picture number① and ②.)

2. Check the Main standby 3.5V on the terminal. (③)

3. AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester

needle should move slowly, otherwise, it’s defective.

Standard Repair Process Detail Technical Manual

Remote control operation checking method

D. Function error

A13

Established

date

Revised

date

Error

symptom

Content

A13

②

③

Checking order to check remote control

IR & EYE Sensor

Eye

LED

Pin Pin name

1 +3.5V_WIFI

2 WIFI_DM

3 WIFI_DP

4 GND

5 WOL/WIFI_PWR_ON

6 +3.5V_WIFI

7 WIFI_SUSPEND/RESUME

8 GND

9 COMBO_RESET

10 BT_WAKE_UP_HOST

11 GND

12 +3.5V_WIFI

13 EYE_SDA

14 EYE_SCL

15 GND

16 GND

17 IR

18 LED_R

19 GND

20 GND

21 +3.5V_ST

22 +3.5V_ST

23 +3.5V_ST

24 KEY2

25 WOV_PDMO_DATAIN

26 WOV_PDM_CLKOUT

①

Only for training and service purposes.

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LG OLED77C3 Series Specifications

General

Screen Size	77 inches
Display Technology	OLED
HDR	Dolby Vision, HDR10, HLG
Smart TV Platform	webOS
HDMI Ports	4
Audio Output	40W
Voice Assistant	Google Assistant, Amazon Alexa
Refresh Rate	120 Hz
Processor	α9 Gen6 AI Processor 4K
VRR	Yes
USB Ports	3
Resolution	3840 x 2160
Bluetooth	Yes
Wi-Fi	Yes