42PW340-UB, 42PW350-UA, 42PW350-UE, 42PW350U-UC (CHASSIS:PU11A) - LG TV Service Manual (repair manual). Page 8

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* Edid data and Model option download(RS232)
5-5. Manual Download 
(1) Write HDMI EDID data
1) Using instruments
- Jig. (PC Serial to D-Sub connection) for PC, DDC
adjustment.
- S/W for DDC recording (EDID data write and read)
- D-sub jack
- Additional HDMI cable connection Jig.
2) Preparing and setting.
- Set instruments and Jig. Like pic.5), then turn on PC
and Jig. 
- Operate DDC write S/W (EDID write & read)
- It will operate in the DOS mode.
EDID DATA (Model name = LG TV)
- HDMI1 EDID table(3D HD) US(PCM)
- HDMI2 EDID table(3D HD) US(PCM)
- HDMI3 EDID table(3D HD) US(PCM)
- RGB EDID table(3D HD) US (PCM)
< For write EDID data, setting Jig and another instruments >
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