LG 49UF640 SERIES - Page 125

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 12 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.
Standard Repair Process Detail Technical Manual
Remote control operation checking method
D. Function error
A22
Established
date
Revised
date
Error
symptom
Content
A22
②
③
1
GND
2
+3.3V
3
WiFi_RESET
4
WiFi_DM
5
GND
6
WiFi_DP
7
EYE_SDA
8
GND
9
EYE_SCL
10
KEY2
11
IR
12
3.3V_STBY
13
LED_R
14
GND
Checking order to check remote control
①
IR Ass’y
Eye
IR
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only