LG 75UM7570AUE Service Manual page 69

Standard Repair Process Detail Technical Manual
symptom
Content
①
IR & EYE Sensor
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 6 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
Established
date
Revised
date
②
A23
Pin Pin name
1
2 USB_DM
3 USB_DP
4
5 WOL/WIFI_ON
6
7 WIFI_Suspend/Resume
8
9 Combo_Reset
10 BT_WAKEUP_HOST
11
12
13
14
15
③
16 EYE_SDA
17 EYE_SCL
18
19
20
21
22
23
24
25
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A23
VCC
GND
VCC
GND
GND
VCC
GND
IR
LED_R
GND
VCC
KEY2
KEY1
GND