LG 47GA7900-UA (CHASSIS:LA37G) Service Manual ▷ View online
- 13 -
4.3 EDID Download
4.3.1 Overview
▪ It is a VESA regulation. A PC or a MNT will display an optimal
resolution through information sharing without any necessity
of user input. It is a realization of “Plug and Play”.
of user input. It is a realization of “Plug and Play”.
4.3.2 Equipment
▪ Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need.
▪ Adjust remocon
4.3.3 Download method
1) Press Adj. key on the Adj. R/C,
2) Select EDID D/L menu.
3) By pressing Enter key, EDID download will begin
4) If Download is successful, OK is display, but If Download is
failure, NG is displayed.
5) If Download is failure, Re-try downloads.
※
Caution) When EDID Download, must remove RGB/HDMI
Cable.
4.3.3.1. EDID DATA
4.3.3.1.1. PCM EDID Data
# HDMI 1(C/S : 42 2C)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 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 42
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 2E F1 48 90 22 20 05 04 03 02 01 23 09 57
10 | 07 78 03 0C 00 10 00 B8 2D 20 C0 0E 01 4F 00 FE
20 | 08 10 06 10 18 10 28 10 38 10 E3 05 03 01 02 3A
30 | 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E
40 | 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00
50 | 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A
60 | 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00
70 | A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 2C
# HDMI 2(C/S : 42 1C)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 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 42
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 2E F1 48 90 22 20 05 04 03 02 01 23 09 57
10 | 07 78 03 0C 00 20 00 B8 2D 20 C0 0E 01 4F 00 FE
20 | 08 10 06 10 18 10 28 10 38 10 E3 05 03 01 02 3A
30 | 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E
40 | 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00
50 | 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A
60 | 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00
70 | A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 1C
# HDMI 3(C/S : 42 0C)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 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 42
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 2E F1 48 90 22 20 05 04 03 02 01 23 09 57
10 | 07 78 03 0C 00 30 00 B8 2D 20 C0 0E 01 4F 00 FE
20 | 08 10 06 10 18 10 28 10 38 10 E3 05 03 01 02 3A
30 | 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E
40 | 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00
50 | 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A
60 | 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00
70 | A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 0C
# HDMI 4(C/S : 42 FC)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 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 42
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 2E F1 48 90 22 20 05 04 03 02 01 23 09 57
10 | 07 78 03 0C 00 40 00 B8 2D 20 C0 0E 01 4F 00 FE
20 | 08 10 06 10 18 10 28 10 38 10 E3 05 03 01 02 3A
30 | 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E
40 | 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00
50 | 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A
60 | 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00
70 | A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 FC
- 14 -
4.3.3.1.2. AC3 EDID Data
# HDMI 1(C/S : 42 BA)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 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 42
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 31 F1 48 90 22 20 05 04 03 02 01 26 15 07
10 | 50 09 57 07 78 03 0C 00 10 00 B8 2D 20 C0 0E 01
20 | 4F 00 FE 08 10 06 10 18 10 28 10 38 10 E3 05 03
30 | 01 02 3A 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00
40 | 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0
50 | 5A 00 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55
60 | 00 A0 5A 00 00 00 1E 26 36 80 A0 70 38 1F 40 30
70 | 20 25 00 A0 5A 00 00 00 1A 00 00 00 00 00 00 BA
# HDMI 2(C/S : 42 AA)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 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 42
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 31 F1 48 90 22 20 05 04 03 02 01 26 15 07
10 | 50 09 57 07 78 03 0C 00 20 00 B8 2D 20 C0 0E 01
20 | 4F 00 FE 08 10 06 10 18 10 28 10 38 10 E3 05 03
30 | 01 02 3A 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00
40 | 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0
50 | 5A 00 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55
60 | 00 A0 5A 00 00 00 1E 26 36 80 A0 70 38 1F 40 30
70 | 20 25 00 A0 5A 00 00 00 1A 00 00 00 00 00 00 AA
# HDMI 3(C/S : 42 9A)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 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 42
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 31 F1 48 90 22 20 05 04 03 02 01 26 15 07
10 | 50 09 57 07 78 03 0C 00 30 00 B8 2D 20 C0 0E 01
20 | 4F 00 FE 08 10 06 10 18 10 28 10 38 10 E3 05 03
30 | 01 02 3A 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00
40 | 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0
50 | 5A 00 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55
60 | 00 A0 5A 00 00 00 1E 26 36 80 A0 70 38 1F 40 30
70 | 20 25 00 A0 5A 00 00 00 1A 00 00 00 00 00 00 9A
# HDMI 4(C/S : 42 8A)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 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 42
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 31 F1 48 90 22 20 05 04 03 02 01 26 15 07
10 | 50 09 57 07 78 03 0C 00 40 00 B8 2D 20 C0 0E 01
20 | 4F 00 FE 08 10 06 10 18 10 28 10 38 10 E3 05 03
30 | 01 02 3A 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00
40 | 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0
50 | 5A 00 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55
60 | 00 A0 5A 00 00 00 1E 26 36 80 A0 70 38 1F 40 30
70 | 20 25 00 A0 5A 00 00 00 1A 00 00 00 00 00 00 8A
- 15 -
4.4. White Balance Adjustment
4.4.1. 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) Adj. condition: normal temperature
- Surrounding Temperature: 25±5 °C
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
4.4.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model: 217, Pattern: 49)
※
Color Analyzer Matrix should be calibrated using CS-1000
4.4.3. Equipment connection
4.4.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj.
RS-232C COMMAND
Explanation
CMD
DATA
ID
Wb
00
00
Begin White Balance adj.
Wb
00
ff
End White Balance adj.
(internal pattern disappears )
(2) Adjustment Map
Adj. item Command
(lower caseASCII)
Data Range
(Hex.)
CMD1
CMD2
MIN
MAX
Cool
R Gain
j
g
00
C0
G Gain
j
h
00
C0
B Gain
j
i
00
C0
Medium
R Gain
j
a
00
C0
G Gain
j
b
00
C0
B Gain
j
c
00
C0
Warm
R Gain
j
d
00
C0
G Gain
j
e
00
C0
B Gain
j
f
00
C0
4.4.5. Adj. method
4.4.5.1. Auto adj. method
(1) Set TV in ADJ mode using P-ONLY key (or POWER ON
key)
(2) Place optical probe on the center of the display
- It need to check probe condition of zero calibration before
adjustment.
(3) Connect RS-232C Cable
(4) Select mode in ADJ Program and begin a adjustment.
(5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode (Cool, Medium,
Warm)
(6) Remove probe and RS-232C cable.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need
4.4.5.2. Manual adj. method
(1) Set TV in Adj. mode using POWER ON
(2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface..
(3) Press ADJ key -> EZ adjust using adj. R/C -> 9. White-
Balance then press the cursor to the right (KEY►). When
KEY(►) is pressed 216 Gray internal pattern will be
displayed.
(4) Adjust Cool modes
(i) Fix the one of R/G/B gain to 192 (default data) and
decrease the others. ( If G gain is adjusted over 172 and
R and B gain less than 192 , Adjust is O.K.)
(ii). If G gain is less than 172,
Increase G gain by up to 172, and then increase R gain
and G gain same amount of increasing G gain.
(iii) If R gain or B gain is over 255,
Readjust G gain less than 172, Conform to R gain is 255
or B gain is 255
(5) Adjust two modes (Medium / Warm) Fix the one of R/G/B
gain to 192 (default data) and decrease the others.
(6) Adj. is completed, Exit adjust mode using “EXIT” key on
Remote controller.
▪ If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner (ON). By selecting OFF, you can
adjust using RF signal in 206 Gray pattern.
▪ 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
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
- 16 -
※
CASE Cool
First adjust the coordinate far away from the target value(x, y).
(1) x, y >target
i) Decrease the R, G.
(2) x, y< target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x > target , y < target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y >target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
How to adjust
(1) If G gain is adjusted over 172 and R gain and B gain less
than 192 , Adjust is O.K.
(2) If G gain is less than 172 , increase G gain by up to 172,
and then increase R gain and B gain same amount of
increasing G gain.
(3) If R gain or B gain is over 255 , Readjust G gain less than
172, Conform to R gain is 255 or B gain is 255
※
CASE Medium / Warm
First adjust the coordinate far away from the target value(x, y).
(1) x, y > target
i) Decrease the R, G.
(2) x, y< target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x >target , y< target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y>target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
▪ 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
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
4.4.6. Reference (White Balance Adj. coordinate and
color temperature)
▪ Luminance: 204 Gray
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
Mode
Coordinate
Temp
△
uv
X
Y
Cool
0.271
0.270
13,000K
0.0000
Medium
0.285
0.293
9,300K
0.0000
Warm
0.313
0.329
6,500K
+0.0030
▪ Standard color coordinate and temperature using
CA-210(CH 14)
Mode
Coordinate
Temp
△
uv
X
Y
Cool
0.269±0.002
0.273±0.002
13,000K
0.0000
Medium
0.285±0.002
0.293±0.002
9,300K
0.0000
Warm
0.313±0.002
0.329±0.002
6,500K
0.0000
▪ Standard color coordinate and temperature using
CA-210(CH-14) – by aging time
Normal Line(GAxxxx)
GP4 Aging time
(Min)
Cool
Medium
Warm
X
Y
X
Y
X
Y
269
273
285
293
313
329
1
0-2
283
287 298
306
322
342
2
3-5
282
285 297
304
321
340
3
6-9
281
284 296
303
320
339
4
10-19
279
281 294
300
318
336
5
20-35
277
277 292
296
316
332
6
36-49
275
274 290
293
314
329
7
50-79
273
272 288
291
312
327
8
80-119
272
271 287
290
311
326
9
Over 120
271
270 286
289
310
325
Aging Chamber(GAxxxx)
GP4 Aging time
(Min)
Cool
Medium
Warm
X
Y
X
Y
X
Y
269
273
285
293
313
329
1
0-5
282
285 297
304
321
340
2
6-10
278
280 293
299
317
335
3
11-20
275
275 290
294
314
330
4
21-30
272
272 287
291
311
327
5
31-40
269
269 284
288
308
324
6
41-50
268
267 283
286
307
322
7
51-80
267
266 282
285
306
321
8
81-119
266
264 281
283
305
319
9
Over 120
265
263 280
282
304
318
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