White Balance Adjustment - LG 42LF580 Series Service Manual

4.1.2. 2D EDID(HD)
0 1 2 3 4 5
00 00 FF FF FF FF FF FF 00 1E 6D
10 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99
20 0F 50 54 A1 08 00 31
30 01 01 01 01 01 01 02 3A 80
40 45 00 40 84 63 00 00 1E 66
50 40 70 36 00 40 84 63
60 3E 1E 53 10 00 0A 20
70
80 02 03 29 F1 4E 10 9F
90 22 15 01 29 3D 06 C0 15
A0 f E3 05
B0 20 58 2C 25 00 A0 5A 00
C0 D0 1A 20 6E 88 55 00
D0 18 71 38 2D 40 58 2C 45
E0 21 50 B0 51 00 1B 30
F0 1E 00 00 00 00 00 00
▪ Reference
- HDMI1 ~ HDMI2
- In the data of EDID, bellows may be different by S/W or
Input mode.
HEX EDID Table
0001
0001
ⓐ Product ID
ⓑ Serial No: Controlled on production line.
ⓒ Month, Year: Controlled on production line:
ex) Monthly : '01' → '01'
Year : '2014' → '18'
ⓓ Model Name(Hex): LGTV
Chassis
LD46H 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
ⓔ Checksum(LG TV): Changeable by total EDID data.
ⓔ1
HDMI1 75
HDMI2 75
HDMI3 75
ⓕ Vendor Specific(HDMI)
INPUT MODEL NAME(HEX)
HDMI1 67 03 0C 00 10 00 80 1E
HDMI2 67 03 0C 00 20 00 80 1E
HDMI3 67 03 0C 00 30 00 80 1E
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6 7 8 9 A B C D
a
40 45 40 61 40 71 40
18 71 38 2D 40
21 50 B0 51 00 1B 30
00 00 1E 00 00 00 FD 00 3A
20 20 20 20 20
d
04 13 05 14 03 02 12
07 50 09 57 07
00 00 01 1D 80 18 71 1C 16
00 00 9E 01 1D 00
A0 5A 00 00 00 1A 02 3A 80
00 A0 5A 00 00 00
40 70 36 00 A0 5A 00
00 00 00 00 00 00 00
DDC Function
0100 Analog
0100 Digital
MODEL NAME(HEX)
ⓔ2 ⓔ3
E2 X
D2 X
C2 X

4.2. White Balance Adjustment

E F 4.2.1. Overview
b
▪ W/B adj. Objective & How-it-works
26
(1) Objective: To reduce each Panel's W/B deviation
81 80
(2) How-it-works : When R/G/B gain in the OSD is at 192, it
58 2C
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
d
find the desired value.
01 e
(3) Adjustment condition : normal temperature
20 21
f
1) Surrounding Temperature : 25 °C ± 5 °C
2) Surrounding Humidity : 20 % ~ 80 %
80 51
4.2.2. Equipment
1E 66
(1) Color Analyzer: CA-210 (LED Module : CH 14)
00 00
(2) Adjustment Computer(During auto adj., RS-232C protocol
00 e
is needed)
(3) Adjustment Remote control
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model: 217, Pattern: 49)
→ Only when internal pattern is not available
▪ Color Analyzer Matrix should be calibrated using CS-1000.
4.2.3. Equipment connection MAP
4.2.4. Adj. Command (Protocol)
<Command Format>
START 6E A 50
- 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]
▪ RS-232C Command used during auto-adjustment.
RS-232C COMMAND
[CMD ID
wb 00
wb 00
wb 00
wb 00
wb 00
wb 00
Ex) wb 00 00 -> Begin white balance auto-adj.
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.
- 13 -
Probe
RS -232C
Signal Source
* If TV internal pattern is used, not needed
A LEN A 03 A CMD A 00
Explanation
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
Co lo r Analyzer
RS -232C
Co m p ut er
RS -232C
Pat t ern Generat o r
A VAL A CS STOP