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.
Standard Repair Process Detail Technical Manual
Normal Remote controller operation checking method
D. Function error_ No response in remote controller
<ALL MODELS>
A27
Established
date
Revised
date
Error
symptom
Content
P4000
1
GND
2
3.5V_WIFI
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
15
IR
16
3.5V_ST
17
LED_R
18
GND
①
②
③
④
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Only for training and service purposes
LGE Internal Use Only
Summary of Contents for 49LF640 Series
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