37LV370S-ZB, 37LV375G-ZC, 37LV375S-ZC, 37LV375W-ZC (CHASSIS:LD12B) - LG TV Service Manual (repair manual). Page 74

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Checking order
1. 
Check the DC 5V on the 3.5V_ST terminal. (Pin 6)
2. 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. 
Input voltage terminal:  3.5V_ST (Pin 6)
Remote controller receiver terminal: IR (Pin 9)
Established 
date 
Electronics 6-3
Standard Repair Process Detail Technical Manual
Revised 
date 
2008. 2 . 1
LCD TV
Error 
symptom
Remote controller operation checking method
Content
D. Function error_ No response in remote controller,
key error
26/33 - 10/13
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