LG 43LM5700PUA - Standard Repair Process Detail Technical Manual - Function Error (Remote Control); D. Function error

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)
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
①
IR & EYE Sensor
IR
Eye
LED
Pin Pin name
1 +3.4V_WIFI
2 WIFI_DM
3 WIFI_DP
4 GND
5 WOL/WIFI_PWR_ON
6 +3.4V_WIFI
7 WIFI_SUSPEND/RESUME
8 GND
9 COMBO_RESET
10 BT_WAKE_UP_HOST
11 GND
12 +3.4V_WIFI
13 NC
14 NC
15 NC
16 EYE_SDA
17 EYE_SCL
18 GND
19 IR
20 LED_R
21 GND
22 +3.4V_ST
23 KEY2
24 GND
25 GND
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