White Balance Adjustment - LG 65LA965V Service Manual

# HDMI 3(C/S : E8 C0)
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
80 02 03 3E F1 4E 10
90 22 15 01 29 3D 06
A0 00 10 00 B8 3C 20
B0 08 10 18 10 06 10
C0 80 18 71 38 2D 40
D0 01 1D 80 18 71 1C
E0 00 9E 01 1D 00 72
F0 63 00 00 1E 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 %
4) Before White balance adjustment, Keep power on
status, don't power off
4.2.2. Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux. Try to isolate adj. area into dark
surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
1) After Aging Start, Keep the Power ON status during 5
Minutes.
2) In case of LCD, Back-light on should be checked using
no signal or Full-white pattern.
4.2.3. 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: 217, Pattern: 49)
→ Only when internal pattern is not available
▪ Color Analyzer Matrix should be calibrated using CS-100.
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 7C
C0 8E 01 02 03 04 01 4F
16 10 28 10 E3 05 03 01
58 2C 45 00 40 84 63 00
16 20 58 2C 25 00 40 84
51 D0 1E 20 6E 28 55 00
00 00 00 00 00 00 00 00
4.2.4. Equipment connection MAP
E F
01 01
Probe
99 26
81 80
58 2C
1B 30
00 3A
00 FC
01 E8
4.2.5. Adj. Command (Protocol)
<Command Format>
E F START 6E A 50 A LEN A 03 A
20 21
- LEN: Number of Data Byte to be sent
03 0C
- CMD: Command
3F FC
- VAL: FOS Data value
02 3A
- CS: Checksum of sent data
00 1E
- A: Acknowledge
63 00
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
40 84
00 C0
▪ 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
B Gain
Warm
R Cut
G Cut
- 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 )
Command Data Range
(lower caseASCII) (Hex.)
CMD1 CMD2 MIN MAX
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
RS -232C
RS -232C
A CS STOP
Default
(Decimal)
C0
C0
C0
C0
C0
C0
C0
C0
C0