50PQ10-UB (CHASSIS:PU92B) - LG TV Service Manual (repair manual). Page 12

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(2) 50FHD Va Adjustment (refer fig. 2)  
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of P811, connect -
terminal to GND pin of P811.
3) After turning VR501,voltage of D.M.M adjustment as same
as Va voltage which on label of panel right/top  (deviation;
±0.5V)
(3) 50FHD Vs Adjustment (refer fig. 2)
1) Connect + terminal of D. M..M. to Vs pin of P811, connect -
terminal to GND pin of P811.
2) After turning VR901, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top  (deviation ;
±0.5V)
(4) 60FHD Va Adjustment (refer fig. 3)  
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of P812, connect -
terminal to GND pin of P812.
3) After turning VR901,voltage of D.M.M adjustment as same
as Va voltage which on label of panel right/top  (deviation;
±0.5V)
(5) 60FHD Vs Adjustment (refer fig. 3)
1) Connect + terminal of D. M..M. to Vs pin of P812, connect -
terminal to GND pin of P812.
2) After turning VR951, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top  (deviation ;
±0.5V)
7. DDC EDID Write
MODEL NAME:  LG TV (Not necessary)
Caution: Please only check write status in Instart-menu
7-1. Manual Download(using DFT)
PC(for communication through RS-232C), UART baud rate:
115200 bps
Command : aa 00 00 (Start Factory mode)
Command : ae 00 10 (Download All EDID)
Command : aa 00 90 (End of Factory mode)
7-2. Manual EDID D/L using Service Remocon
(1) After enter Service Mode by pushing “ADJ” key, select “4.
EDID D/L”.
(2) Finally execute “START” by pushing “
G
” or “
9
”key. 
ADJUSTMENT INSTRUCTIONS
(Fig. 2)  50FHD Power PCB Assy Voltage Adjustment
(Fig. 3)  60FHD Power PCB Assy Voltage Adjustment

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