LG 55UJ634 Series Service Manual page 77

Standard Repair Process Detail Technical Manual
symptom
Content
①
IR & Control Key front
IR & Control Key Rear
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 25 pin (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.
Error
D. Function error
Remote control operation checking method
IR
②
A22
Established
date
Revised
date
1 +3.5V_WIFI
2 WIFI_DM_JACK
3 WIFI_DP_JACK
4 GND
5 WOL/WIFI_POWER_ON_JACK
6 +3.5V_WIFI
7 COMBO_RESET_JACK
8 GND
9 BT_WAKEUP_DEVICE_JACK
10 BT_WAKEUP_HOST_JACK
11 GND
12 GND
16 EYE_SDA
17 EYE_SCL
18 GND
19 IR_JACK
③ 20 LED_R_JACK
21 GND
22 +3.5V_ST
23 KEY2_JACK
24 KEY1_JACK
25 GND
A22