26LV3000 (CHASSIS:LB01V) - LG TV Service Manual (repair manual). Page 77

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Checking order
1, 2.  Check IR cable condition between IR & Main board.
3. Check the st-by 3.3V on the terminal 6.
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
Remote controller operation checking method
D. Function error_ No response in remote controller,
key error
<ALL MODELS>
A27
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A27
1
2
P2402
1
SCL
2
SDA
3
GND
4
KEY1
5
KEY2
6
St 3.3V
7
GND
8
LED_B
9
IR
10
GND
11
Normal 3.3V
12
LED_R
13
GND
14
S/T_SCL
15
S/T_SDA
3
4
2010. 2 .19
P2401
1
SCL
2
SDA
3
GND
4
KEY1
5
KEY2
6
St 3.3V
7
GND
8
LED_B
9
IR
10
GND
11
Normal 3.3V
12
LED_R
LV34,LK43
LK53,LK33
LW45,LV35
LV25
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