White Balance Adjustment - LG 55LA86 Series Service Manual

# HDMI 3(C/S : E8 61)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 0 1 2 3 4 5
00 00 FF FF FF FF FF
10 01 17 01 03 80 A0
20 0F 50 54 A1 08 00
30 01 01 01 01 01 01
40 45 00 40 84 63 00
50 40 70 36 00 40 84
60 3E 1E 53 10 00 0A
70 00 4C 47 20 54 56
EDID Block 1, Bytes 128-255 [80H-FFH]
0 0 1 2 3 4 5
00 02 03 3A F1 4E 10
10 22 15 01 29 3D 06
20 00 30 00 B8 2D 20
30 06 10 16 10 28 10
40 2D 40 58 2C 45 00
50 71 1C 16 20 58 2C
60 00 72 51 D0 1E 20
70 00 00 00 00 00 00
# HDMI 4(C/S : E8 51)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 0 1 2 3 4 5
00 00 FF FF FF FF FF
10 01 17 01 03 80 A0
20 0F 50 54 A1 08 00
30 01 01 01 01 01 01
40 45 00 40 84 63 00
50 40 70 36 00 40 84
60 3E 1E 53 10 00 0A
70 00 4C 47 20 54 56
EDID Block 1, Bytes 128-255 [80H-FFH]
0 0 1 2 3 4 5
00 02 03 3A F1 4E 10
10 22 15 01 29 3D 06
20 00 40 00 B8 2D 20
30 06 10 16 10 28 10
40 2D 40 58 2C 45 00
50 71 1C 16 20 58 2C
60 00 72 51 D0 1E 20
70 00 00 00 00 00 00

4.2. White Balance Adjustment

4.2.1. Overview
▪ W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel's W/B deviation
(2) 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.
(3) Adjustment condition : normal temperature
1) Surrounding Temperature : 25 °C ± 5 °C
2) Warm-up time: About 5 Min
3) Surrounding Humidity : 20 % ~ 80 %
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6 7 8 9 A B C D
FF 00 1E 6D 01 00 01 01
5A 78 0A EE 91 A3 54 4C
31 40 45 40 61 40 71 40
02 3A 80 18 71 38 2D 40
00 1E 66 21 50 B0 51 00
63 00 00 1E 00 00 00 FD
20 20 20 20 20 20 00 00
0A 20 20 20 20 20 20 20
6 7 8 9 A B C D
9F 04 13 05 14 03 02 12
C0 15 07 50 09 57 07 78
C0 0E 01 4F 3F FC 08 10
E3 05 03 01 02 3A 80 18
40 84 63 00 00 1E 01 1D
25 00 40 84 63 00 00 9E
6E 28 55 00 40 84 63 00
00 00 00 00 00 00 00 00
6 7 8 9 A B C D
FF 00 1E 6D 01 00 01 01
5A 78 0A EE 91 A3 54 4C
31 40 45 40 61 40 71 40
02 3A 80 18 71 38 2D 40
00 1E 66 21 50 B0 51 00
63 00 00 1E 00 00 00 FD
20 20 20 20 20 20 00 00
0A 20 20 20 20 20 20 20
6 7 8 9 A B C D
9F 04 13 05 14 03 02 12
C0 15 07 50 09 57 07 78
C0 0E 01 4F 3F FC 08 10
E3 05 03 01 02 3A 80 18
40 84 63 00 00 1E 01 1D
25 00 40 84 63 00 00 9E
6E 28 55 00 40 84 63 00
00 00 00 00 00 00 00 00
4.2.2. Equipment
(1) Color Analyzer: CA-210 (LED Module : CH 14)
(2) Adjustment Computer(During auto adj., RS-232C protocol
E F
is needed)
01 01
(3) Adjustment Remote control
99 26
(4) Video Signal Generator MSPG-925F 720p/216-Gray
81 80
(Model: 217, Pattern: 78)
58 2C
→ Only when internal pattern is not available
1B 30
▪ Color Analyzer Matrix should be calibrated using CS-100.
00 3A
00 FC
01 E8 4.2.3. Equipment connection MAP
E F
Probe
20 21
03 0C
18 10
71 38
80 18
01 1D
00 1E
00 61
4.2.4. Adj. Command (Protocol)
<Command Format>
START 6E A 50 A LEN A 03 A
- LEN: Number of Data Byte to be sent
E F
- CMD: Command
01 01
- VAL: FOS Data value
99 26
- CS: Checksum of sent data
81 80
- A: Acknowledge
58 2C
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
1B 30
00 3A
▪ RS-232C Command used during auto-adjustment.
00 FC
RS-232C COMMAND
01 E8
[CMD ID
wb 00
wb 00
E F
wb 00
20 21
wb 00
03 0C
wb 00
18 10
71 38
wb 00
80 18
01 1D
00 1E
Ex) wb 00 00 -> Begin white balance auto-adj.
00 51
wb 00 10 -> Gain adj.
ja 00 ff -> Adj. data
jb 00 c0
...
...
wb 00 1f → Gain adj. completed
*(wb 00 20(Start), wb 00 2f(end)) → Off-set adj.
wb 00 ff → End white balance auto-adj.
- 17 -
Co lo r Analyzer
Co m p ut er
RS -232C
Pat t ern Generat o r
Signal Source
* If TV internal pattern is used, not needed
CMD A 00 A VAL
Explantion
DATA]
00 Begin White Balance adjustment
10 Gain adjustment(internal white pattern)
1f Gain adjustment completed
20 Offset adjustment(internal white pattern)
2f Offset adjustment completed
End White Balance adjustment
ff
(internal pattern disappears )
LGE Internal Use Only
RS -232C
RS -232C
A CS STOP