Read LG 42LG72 (CHASSIS:LA86B) Service Manual online
O
RGB [C/S : F6BC]
EDID Block 0 table =
EDID Block 1 table =
5. White Balance
5-1. The Purpose and Principal of Color
Temperature Adjustment
(1) Purpose: to reduce the difference in color temperature
among modules
(2) Principal: A module is in full dynamic range when RGB
Gain on OSD is 192. To adjust the white balance without
causing full dynamic range and full data, fix one of RGB
Gains at 192 and control the other two by reducing them
from 192.
causing full dynamic range and full data, fix one of RGB
Gains at 192 and control the other two by reducing them
from 192.
5-2. Required Equipment
(1) Color Analyzer : CA-210 (NCG:CH 9 / WCG:CH12 / LED
Module:CH14))
(2) Automatic computer (with automatic adjustment necessity
and the RS-232C communication being possible)
(3) Remote control for adjustment
(4) Video Signal Generator MSPG-925F 720p, 216Gray
(4) Video Signal Generator MSPG-925F 720p, 216Gray
(Model : 217, Pattern 78)=> Applied only when the inner
pattern cannot be used
pattern cannot be used
*Use the Color Analyzer with the matrix calibrated by the CS-
1000
5-3. Adjustment command (Protocol)
(1) Protocol
<Command Format>
- LEN : Number of Data Byte
- CMD : Command
- VAL : Value of FOS Data
- CS : Checksum
- A : Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX}
- CMD : Command
- VAL : Value of FOS Data
- CS : Checksum
- A : Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX}
(2) RS-232C Command(Automatic adjustment)
Ex) wb 00 00 : Start Auto-adjustment of white balance.
wb 00 10 : Start Gain Adjustment (Inner pattern)
ja 00 ff : Adjustment data
jb 00 c0 :
…
…
wb 00 1f : End of Gain adjustment
ja 00 ff : Adjustment data
jb 00 c0 :
…
…
wb 00 1f : End of Gain adjustment
* (wb 00 20(start), wb 00 2f(end)) -> In the case of Off-
set adjustment
wb 00 ff : End of white balance adjustment
wb 00 ff : End of white balance adjustment
(3) Adjustment Map
- 12 -
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
00
11
01
03
18
73
41
96
0A
CF
74
A3
57
4C
B0
23
20
09
48
4C
AF
CF
00
31
40
45
40
61
40
81
80
A9
40
30
01
01
01
01
01
01
66
21
50
B0
51
00
1B
30
40
70
40
36
00
C4
8E
21
00
00
1A
02
3A
80
18
71
38
2D
40
50
58
2C
45
00
C4
8E
21
00
00
1E
00
00
00
FD
00
30
60
58
1F
64
11
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
F6
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
02
03
04
00
0E
1F
00
80
51
00
1E
30
40
80
37
00
10
C4
8E
21
00
00
1C
F1
27
00
A0
51
00
25
30
50
80
20
37
00
C4
8E
21
00
00
1C
26
36
80
A0
70
38
1F
40
30
30
20
25
00
C4
8E
21
00
00
0A
00
00
00
00
00
00
40
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
50
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
60
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
70
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
BC
Co lo r An alyzer
Co m p ut er
Pat t ern Gen erat o r
RS -232C
RS -232C
RS -232C
Probe
Signal Source
*
Not used when the inner pattern of the TV set is used
Connection Diagram of Automatic Adjustment
RS-232C Command
Meaning
[CMD ID DATA]
wb
00
00
White Balance adjustment start.
wb
00
ff
End of White Balance adjust(Inner pattern disappeared)
LEN
CMD
VAL
CS
ITEM
Command
Data Range
Default
(Hex.)
(Decimal)
Cmd 1
Cmd 2
Min
Max
Cool
R-Gain
j
g
00
C0
TBD
G-Gain
j
h
00
C0
TBD
B-Gain
j
i
00
C0
TBD
R-Cut
TBD
G-Cut
TBD
B-Cut
TBD
Medium
R-Gain
j
a
00
C0
TBD
G-Gain
j
b
00
C0
TBD
B-Gain
j
c
00
C0
TBD
R-Cut
TBD
G-Cut
TBD
B-Cut
TBD
Warm
R-Gain
j
d
00
C0
TBD
G-Gain
j
e
00
C0
TBD
B-Gain
j
f
00
C0
TBD
R-Cut
G-Cut
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