55LV3730 (CHASSIS:LB12B) - LG TV Service Manual (repair manual). Page 10

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- 10 -
4.2. EDID(The Extended Display Identification
Data)/DDC(Display Data Channel) download
(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”.
(2) Equipment
- Adjustment remote control
- Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need.
(3)Download method
1) Press Adjust key on the Adjustment remote control then
select “10.EDID D/L”, By pressing Enter key, enter EDID
D/L menu.
2) Select [Start] button by pressing Enter key, HDMI1/
HDMI2/ HDMI3/ HDMI4/ RGB are Writing and display
OK or NG.
(4) EDID DATA
A
RGB(FHD)
A
HDMI(FHD HDMI 1.3, Except 3D) - LVDS 10 BIT
* Physical Add & Checksum(HDMI1/2/3/4)
4.3. White Balance Adjustment
4.3.1. Overview
(1) W/B adj. Objective & How-it-works
(2) Objective: To reduce each Panel’s W/B deviation
(3) How-it-works : When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. In order to
prevent saturation of Full Dynamic range and data, one of
R/G/B is fixed at 192, and the other two is lowered to find
the desired value. 
(4) Adjustment condition : normal temperature
1) Surrounding Temperature : 25 ºC ± 5 ºC
2) Warm-up time: About 5 Min
3) Surrounding Humidity : 20 % ~ 80 %
4.3.2. Equipment
1) Color Analyzer: CA-210 (LED Module : CH 14)
2) Adjustment Computer(During auto adj., RS-232C protocol is
needed)
3) Adjustment Remote control
4) Video Signal Generator MSPG-925F 720p/216-Gray
(Model: 217, Pattern: 78)
-> Only when internal pattern is not available
A
Color Analyzer Matrix should be calibrated using CS-1000.
4.3.3. Equipment connection MAP
4.3.4. Adj. Command (Protocol)
<Command Format>
- LEN: Number of Data Byte to be sent
- CMD: Command
- VAL: FOS Data value
- CS: Checksum of sent data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
D-sub to D-sub
DVI-D to HDMI or HDMI to HDMI
For HDMI EDID
For Analog EDID
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
00
FF
FF
FF
FF
FF
FF
00
1E
6D
01
00
01
01
01
01
10
01
14
01
03
80
10
09
78
0A
EE
91
A3
54
4C
99
26
20
0F
50
54
A1
08
00
71
4F
81
01
01
01
01
01
01
01
30
01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
40
45
00
A0
5A
00
00
00
1E
01
1D
00
72
51
D0
1E
20
50
6E
28
55
00
A0
5A
00
00
00
1E
00
00
00
FD
00
3A
60
3E
1E
53
10
00
0A
20
20
20
20
20
20
00
00
00
FC
70
00
4C
47
20
54
56
0A
20
20
20
20
20
20
20
01
D7
80
02
03
26
F1
4E
10
1F
84
13
05
14
03
02
12
20
21
90
22
15
01
26
15
07
50
09
57
07
67
03
0C
00
XX
XX
A0
B8
2D
E3
05
03
01
01
1D
80
18
71
1C
16
20
58
2C
B0
25
00
A0
5A
00
00
00
9E
01
1D
00
80
51
D0
1A
20
C0
6E
88
55
00
A0
5A
00
00
00
1A
02
3A
80
18
71
38
D0
2D
40
58
2C
45
00
A0
5A
00
00
00
1E
66
21
50
B0
E0
51
00
1B
30
40
70
36
00
A0
5A
00
00
00
1E
00
00
F0
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
XX
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
00
FF
FF
FF
FF
FF
FF
00
1E
6D
01
00
01
01
01
01
10
01
15
01
03
68
10
09
78
0A
EE
91
A3
54
4C
99
26
20
0F
50
54
A1
08
00
71
40
81
C0
81
00
81
80
95
00
30
90
40
A9
C0
B3
00
02
3ª
80
18
71
38
2D
40
58
2C
40
45
00
A0
5ª
00
00
00
1E
66
21
50
B0
51
00
1B
30
50
40
70
36
00
A0
5ª
00
00
00
1E
00
00
00
FD
00
3ª
60
3E
1E
53
10
00
0A
20
20
20
20
20
20
00
00
00
FC
70
00
4C
47
20
54
56
0A
20
20
20
20
20
20
20
00
98
INPURT
9Eh/9Fh(Physical Add)
FFh(Checksum)
HDMI 1
10
00
11
HDMI 2
20
00
01
HDMI 3
30
00
F1
Co lo r Analyzer
 
Co m p ut er
 
Pat t ern  Generat o r
 
RS -232C 
RS -232C 
RS -232C 
Probe
Signal Source
* If TV internal pattern is used, not needed
LEN
CMD
VAL
CS
Display
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