42LC50C (CHASSIS:LA64A) - LG TV Service Manual (repair manual). Page 14

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6.4 RF Color Balance

1) Input the RF cable(2 ch)
2) Set the EZ Pictures to Daylight mode in Video menu.
3) Press INSTART key on R/C for adjustment.  
4) Press the 

G

(Vol. +) key operate To set, then it becomes

automatically.

5) Auto-RGB OK means completed adjustment 

7.1 EDID(The Extended Display Identification Data) /

DDC(Display Data Channel) download

7.1.1 Required Test Equipment
1) Adjusting PC with S/W for writing EDID Data.
2) A Jig for EDID Download
3) Cable: Serial (9Pin or USB) to D-sub 15Pin cable, D-sub

15Pin cable, DVI to HDMI cable.

7.1.2 Setting of device

- When input HDMI EDID data through RGB or HDMI jack,

writing 8bits of the data at every turn with 'DDC2B'
protocol.

Default Value on OSD

G

G

<Fig.4> Connection Diagram of DDC download