LG 55QNED85SQA Service Manual page 68

Standard Repair Process Detail Technical Manual
symptom
Content
①
IR & EYE Sensor
Eye LED
Checking order to check remote control
Checking order
1. Check IR cable condition between IR & Main board.(Check picture number① and ②.)
2. Check the standby 3.5V on the terminal. (③)
Error
D. Function error
Remote control operation checking method
②
IR
Pin #25
Pin #1
Established
date
Revised
date
A14
A14
Pin Pin name
1 +3.5V_WIFI
2 WIFI_DM
3 WIFI_DP
4 GND
5 WOL/WIFI_POWER_ON
6 +3.5V_WIFI
7 WIFI_SUSPEND/RESUME
8 GND
9 COMBO_RESET
10 BT_WAKEUP_HOST
11 GND
12 +3.5V_WIFI
13 N.C
14 N.C
15 N.C
③
16 EYE_SDA
17 EYE_SCL
18 GND
19 IR
20 LED_R
21 GND
22 +3.5V_ST
23 KEY2
24 MIC_DATA
25 MIC_CLK