42PC5D-UC, 42PC5DC-UC (CHASSIS:PA-73E) - LG TV Service Manual (repair manual). Page 13

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ADJUSTMENT INSTRUCTIONS
5-5. Adjustment(LG IT: EAY32957901) 
(1) Va Adjustment
1) Connect + terminal of D.M.M to Va pin of P812 and
connect – terminal  to GND pin of P812.
2) Adjust VR951 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D.M.M to Vs pin of P812 and
connect – terminal to GND pin of P812.
2) Adjust VR901 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
6. ADC-Set Adjustment
6-1. Synopsis
ADC-Set adjustment to set the black level and the Gain to
optimum.
6-2. Test Equipment 
Service R/C, 801GF(802V, 802F, 802R) or MSPG925FA
Pattern Generator
(480i/1080i  The Horizontal 100% Color Bar Pattern adjust to
within  0.7±0.1Vp-p)
[ADC adjustment (MSPG-925Fx series) Model No. & Pattern No.]
- Model No.: #209(480i adjustment), #223(1080i adjustment)
- Pattern No.: #65(7ColorBar Pattern)
<Fig. 1-4>  50” PSU(LG IT: EAY32957901)
<Fig. 2>  Adjustment Mode
<Fig. 3>  Adjustment Pattern: 480i/1080i 60Hz HozTV31Bar
Pattern
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