LG 55UB820T Service Manual page 17

EDID Block 1, Bytes 128-255 [80H-FFH]
0 1 2 3 4 5 6
80 02 03 3C F1 54 10 9F 04 13 05 14 03 02 12 20 21
90 22 15 01 5D 5E 5F 62 63 64 29 3D 06 C0 15 07 50
A0 09 57 07 6E 03 0C 00 30 00 B8 3C 20 00 80 01 02
B0 03 04 E3 05 03 01 E5 0E 60 61 65 66 01 1D 80 18
C0 71 1C 16 20 58 2C 25 00 40 84 63 00 00 9E 01 1D
D0 00 72 51 D0 1E 20 6E 28 55 00 40 84 63 00 00 1E
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0D
* Checksum(HDMI1/2/3)
Input
HDMI1
HDMI2
HDMI3
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 %
4.2.2. 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: 204, Pattern: 49)
→ Only when internal pattern is not available
Color Analyzer Matrix should be calibrated using CS-100.
•
4.2.3. Equipment connection MAP
Probe
* If TV internal pattern is used, not needed
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
7 8 9 A B C D
FFh (Checksum)
E7 2D
E7 1D
E7 0D
Co lo r Analyzer
RS -232C
Co m p ut er
RS -232C
RS -232C
Pat t ern Generat o r
Signal Source
4.2.4. Adj. Command (Protocol)
<Command Format>
E F
START 6E A 50 A LEN A 03 A
- 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.
▪ Adj. Map
Adj. item
R Gain
G Gain
B Gain
Cool
R Cut
G Cut
B Cut
R Gain
G Gain
B Gain
Medium
R Cut
G Cut
B Cut
R Gain
G Gain
Warm B Gain
R Cut
G Cut
- 17 -
CMD A 00 A
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)
Command Data Range
(lower case ASCII) (Hex.)
CMD1 CMD2 MIN
j g 00
j h 00
j i 00
j a 00
j b 00
j c 00
j d 00
j e 00
j f 00
LGE Internal Use Only
VAL A CS STOP
Default
(Decimal)
MAX
C0
C0
C0
C0
C0
C0
C0
C0
C0