42SL90-UA (CHASSIS:LA92S) - LG TV Service Manual (repair manual). Page 12

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4.2. EDID (The Extended Display Identification
Data) / DDC (Display Data Channel) download 
4.2.1 Overview
It is a VESA regulation. A PC or a MNT will display an
optimal resolution through information sharing  without any
necessity of user input. It is a realization of “Plug and Play”. 
4.2.2. Equipment 
Adj. R/C 
Since an embedded EDID data is used, EDID download jig,
HDMI cable and D-sub cable are not need.   
4.2.3. Download method 
1) Press Adj. key On the Adj. R/C, press Adj. key then select
EDID D/L.  By pressing Enter key, EDID download will
begin. 
2) If Download is successful, OK is displayed. 
3) If Download is a failure, NG is displayed. 
4) Re-try download. 
4.2.4. EDID DATA 
1) HDMI I [C/S: 1DCA] 
EDID Block 0, Bytes 0-127 [00H-7FH] 
Block Type: EDID 1.3 
EDID Block 1, Bytes 128-255  [80H-FFH] 
Block Type: CEA EDID Timing Extension Version 3 
2) HDMI II [C/S: 1DBA] 
EDID Block 0, Bytes 0-127 [00H-7FH] 
Block Type: EDID 1.3 
EDID Block 1, Bytes 128-255  [80H-FFH] 
Block Type: CEA EDID Timing Extension Version 3 
3) HDMI III [C/S: 1DAA] 
EDID Block 0, Bytes 0-127 [00H-7FH] 
Block Type: EDID 1.3 
EDID Block 1, Bytes 128-255  [80H-FFH] 
Block Type: CEA EDID Timing Extension Version 3 
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