LG 47LM6700 Service Manual page 16

5. Factory Adjustment
5.1. EDID (The Extended Display Identification
Data)/DDC (Display Data Channel) Download
● Summary
▪ It is established in VESA, for communication between PC
and Monitor without order from user for building user
condition. It helps to make easily use realize "Plug and Play"
function. For EDID data write, we use DDC2B protocol.
● Auto Download
▪ After enter Service Mode by pushing "ADJ" key
▪ Enter EDID D/L mode.
▪ Enter "START" by pushing "OK" key.
=> Caution : Never connect HDMI & D-sub Cable when the
user downloading . Use the proper cables below
for EDID Writing.
※ Edid data and Model option download (RS232)
NO Item CMD 1
Enter Download A E
download 'Mode In'
MODE
Edid data Download A E
and
Model
option
download
Adjust A E
'Mode Out'
Adjustment A E
Confirma-
tion
Manual Download
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
CMD 2 Data 0
0 0 When transfer the
'Mode In',
Carry the com-
mand.
*Note1 *Note2 Automatically
download
(The use of a
internal Data)
9 0
9 9 To check Download
on Assembly line.
● Write HDMI EDID data
▪ 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.
▪ 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.
PC
Pic.3) For write EDID data, setting Jig and another instruments.
* EDID data for Non 3DTV (LS5700-SB Series) (Model name =
LG TV)
- HDMI EDID table (0x1E : Physical Address)
- HDMI-1 EDID table (0x43, 0x15)
1) HDMI 1 Check sum : 0x43, 0X15 (CEA Block 0x1E :10)
2) HDMI 2 Check sum : 0x43, 0X05 (CEA Block 0x1E :20)
3) HDMI 3 Check sum : 0x43, 0XF5 (CEA Block 0x1E :30)
4) HDMI 4 Check sum : 0x43, 0XE5 (CEA Block 0x1E :40)
- Analog (RGB) EDID table
1) RGB CheckSum : 5C
- 16 -
LCD TV SET
(or digital board)
JIG
LGE Internal Use Only