42PG20-UA (CHASSIS:PU84A) — LG TV Service Manual (repair manual). Page 8

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6. DDC EDID Write 
(MODEL NAME:  LG TV)
Caution: Press the POWER ON KEY on R/C before EDID download.
EDID download is processed automatically through RS-232C
PC(for communication through RS-232C), UART baud rate:
115200 bps
O
EDID Download Protocol (RS-232C)
O
HDMI-1 EDID DATA
O
HDMI-2 EDID DATA
O
HDMI-3 EDID DATA
O
RGB EDID DATA
ADJUSTMENT INSTRUCTIONS
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