LG 40LF6300-UA Service Manual page 109

Standard Repair Process Detail Technical Manual
Error symptom
Content
<ALL MODELS>
①
Checking order
1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.5V on the terminal 16.
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
D. Function error_ No response in remote controller,
key error
Remote controller operation checking method
Established
date
Revised
date
②
A27
P4000
1 GND
2 3.5V_WOL
3
BT_RESET
4 USB_DM
5 NC
6 USB_DP
7 WOL
8 GND
9 EYE_SDA
10 GND
11 EYE_SCL
12 KEY1
13 GND
14 KEY2
④
15 IR
③
16 3.5V_ST
17 LED_R
18 GND
LGE Internal Use Only