LG 43UH67 Series Service Manual page 73

Standard Repair Process Detail Technical Manual
symptom
Content
<UH65 MODELS>
①
IR & Control Key front
IR & Control Key Rear
IR
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 18 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.
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Only for training and service purposes
Error
D. Function error
remote control operation checking method
Eye
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 3D_SYNC_RF_JACK
7 BT_RESET_JACK
8 GND
12 EYE_SDA_JACK
13 EYE_SCL_JACK
14 GND
15 IR
16 LED_R_JACK
17 GND
18 +3.5V_ST
19 KEY2_JACK
③
20 KEY1_JACK
21 GND
A22
LGE Internal Use Only