LG 50UH5500 Service Manual page 118

Standard Repair Process Detail Technical Manual
Error
symptom
Content
<50/65UH5500-UA>
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 15 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.
D. Function error
Remote control operation checking method
②
IR
Established
date
Revised
date
③
A22
A22
1 GND
2 +3.5V_WIFI
3 WOL/WIFI_POWER_ON_JACK
4 WIFI_DM_JACK
5 GND
6 WIFI_DP_JACK
7 NC
8 NC
9 GND
10 KEY2
11 IR
12 +3.5V_ST
13 LED_R_JACK
14 GND
15 GND