LG 50UL3G Service Manual page 52

Standard Repair Process Detail Technical Manual
symptom
Monitor Signage
Content
① IR & EYE Sensor
IR 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 16 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
Eye
Established
date
Revised
date
②
A17
A17
Pin Pin name
1 VCC
2 WIFI_DM
3 WIFI_DP
4 GND
5 WOL/WIFI_ON
6 VCC
7 WIFI_SUSPEND
8
9 COMBO_RESET
10 BT_WAKEUP_HOST
11 GND
12 GND
13
14
15
③
16 EYE_SDA
17 EYE_SCL
18 GND
19
20 LED_R
21 GND
22 VCC
23 KEY2
24 KEY1
25 GND
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GND
IR