White Balance - LG 42LG30 Service Manual

O HDMI-3 [C/S : 8A07]
EDID Block 0 table =
0 1 2 3 4 5 6
0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 00 11 01 03 80 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 1E 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 8A
EDID Block 1 table =
0 1 2 3 4 5 6
0 02 03 18 F1 47 84 05 03 02 20 22 10 23 15 07 50
10 67 03 0C 00 30 00 B8 2D 01 1D 00 72 51 D0 1E 20
20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C
30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A
40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A
50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18
60 26 36 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00
70 00 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 07
O
RGB [C/S : F6BC]
EDID Block 0 table =
0 1 2 3 4 5 6
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 2001 F6
EDID Block 1 table =
0 1 2 3 4 5 6
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

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.
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
7 8 9 A B C D E
7 8 9 A B C D E
7 8 9 A B C D E
7 8 9 A B C D E
5-2. Required Equipment
(1) Color Analyzer : CA-210 (NCG : CH 9 / WCG : CH12)
(2) Automatic adjuster (with automatic adjustment necessity
F
and the RS-232C communication being possible)
(3) Remote control for adjustment
(4) Video Signal Generator MSPG-925F 720p, 216Gray
(Model : 217, Pattern 78)=> Applied only when the inner
pattern cannot be used
*Use the Color Analyzer with the matrix calibrated by the CS-
1000
Probe
F
* Not used when the inner pattern of the TV set is used
Connection Diagram of Automatic Adjustment
5-3. Adjustment command (Protocol)
(1) Protocol
F <Command Format>
LEN
- 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}
(2) RS-232C Command(Automatic adjustment)
F
RS-232C COMMAND
[CMD ID DATA]
wb 00 00
wb 00 10
wb 00 1f
wb 00 20
wb 00 2f
wb 00 ff
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
* (wb 00 20(start), wb 00 2f(end)) -> In the case of Off-
set adjustment
wb 00 ff : End of white balance adjustment
- 12 -
Co lo r Analyzer
Co m p ut er
RS -232C
Pat t ern Generat o r
Signal Source
CMD VAL
Meaning
White Balance adjustment start.
Start of adjust gain (Inner white pattern)
End of gain adjust
Start of offset adjust(Inner white pattern)
End of offset adjust
End of White Balance adjust(Inner pattern disappeared)
LGE Internal Use Only
RS -232C
RS -232C
CS