Read LG 55GA7900-UA (CHASSIS:LA37G) Service Manual online
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
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
A27
Established
date
Revised
date
Error
symptom
Content
LCD TV
A27
P4102
1
GND
2
KEY1
3
KEY2
4
3.5V_ST
5
GND
6
LOGO_LIGHT
7
IR
8
GND
9
EYE
10
GND
①
②
③
④
2011. 12 .14
<GA64/7900>
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