47LE5400 (CHASSIS:LA02D) - LG TV Service Manual (repair manual). Page 20

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5.3. V-COM Adjustment 
(1) Press the ADJ key of Adjustment remote controller.  EZ ADJUST mode. 
(2) Select the “13.V-Com”. 
(3) At the V-Com adjustment Mode use 
F
G
Key and adjust V-Com voltage. (Refer to Picture) 
- After finding minimum point of Flicker save data using 
A  
(OK) Key. 
(4) Exit 
5.4. Speaker output check  
5.4.1. Audio input condition 
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation 
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms) 
(3) RGB PC: 1KHz sine wave signal (0.7Vrms) 
5.4.2. Specification 
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