LG 50LN54 Series Service Manual page 76

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
<ALL MODELS>
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.
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Only for training and service purposes
Error
D. Function error_ No response in remote controller,
key error
Remote controller operation checking method
②
①
②
Established
2013. 01 .09
date
Revised
date
1
2
3
③
4
④
5
6
7
8
9
A17
P600
GND
KEY1
KEY2
3.5V_ST
GND
LED_R/BUZZ
IR
GND
GND
LGE Internal Use Only