LG 49LF620V Service Manual page 59

Standard Repair Process Detail Technical Manual
Error symptom
Content
< Sub Ass'y>
①
Checking order
1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.5V on the terminal 4.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
D. Function error_ No response in remote controller,
key error
Remote controller operation checking method
②
Established
date
Revised
date
< Main Ass'y>
P4600
1 GND
2 KEY1
3 KEY2
③
4 3.5V_ST
5 GND
6 LED_R
④
7 IR
8 GND
9 SCL
10 SDA
A17
LGE Internal Use Only