LG 55LS675H (CHASSIS:LA2AG) Service Manual ▷ View online
- 5 -
5. RGB (PC)
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
DDC
1
640*350
31.468
70.09
25.17
EGA
Х
2
720*400
31.469
70.08
28.32
DOS
O
3
640*480
31.469
59.94
25.17
VESA(VGA)
O
4
800*600
37.879
60.31
40.00
VESA(SVGA)
O
5
1024*768
48.363
60.00
65.00
VESA(XGA)
O
6
1280*768
47.776
59.870
79.5
CVT(WXGA)
Х
7
1360*768
47.712
60.015
85.50
VESA (WXGA)
Х
8
1600*1200
75.00
60.00
162.0
VESA (UXGA)
X
9
1920*1080
67.50
60.00
148.5
HDTV 1080P
O
6. HDMI Input
No.
Resolution
H-freq(kHz)
V-freq.(kHz)
Pixel clock(MHz)
Proposed
PC
DDC
1
640*350
31.468
70.09
25.17
EGA
Х
2
720*400
31.469
70.08
28.32
DOS
O
3
640*480
31.469
59.94
25.17
VESA(VGA)
O
4
800*600
37.879
60.31
40.00
VESA(SVGA)
O
5
1024*768
48.363
60.00
65.00
VESA(XGA)
O
6
1280*768
47.776
59.870
79.5
CVT(WXGA)
Х
7
1360*768
47.712
60.015
85.50
VESA (WXGA)
O
8
1600*1200
75.00
60.00
162.0
VESA (UXGA)
X
9
1920*1080
67.50
60.00
148.5
HDTV 1080P
O
DTV
1
720*480
31.47
60
27.027
SDTV 480P
2
720*480
31.47
59.94
27.00
SDTV 480P
3
1280*720
45.00
60.00
74.25
HDTV 720P
4
1280*720
44.96
59.94
74.176
HDTV 720P
5
1920*1080
33.75
60.00
74.25
HDTV 1080I
6
1920*1080
33.72
59.94
74.176
HDTV 1080I
7
1920*1080
67.500
60
148.50
HDTV 1080P
8
1920*1080
67.432
59.939
148.352
HDTV 1080P
9
1920*1080
27.000
24.000
74.25
HDTV 1080P
10
1920*1080
26.97
23.976
74.176
HDTV 1080P
11
1920*1080
33.75
30.000
74.25
HDTV 1080P
12
1920*1080
33.71
29.97
74.176
HDTV 1080P
- 6 -
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet applies to LA2AG Chassis applied LED TV
all models manufactured in TV factory
2. Specification
(1) Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 ±5 °C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz.
(5) At first Worker must turn on the SET by using Power Only
key.
(6) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15 °C
In case of keeping module is in the circumstance of 0°C, it
should be placed in the circumstance of above 15°C for 2
hours
In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3 hours.
[Caution]
When still image is displayed for a period of 20 minutes or
longer (especially where W/B scale is strong.
Digital pattern 13ch and/or Cross hatch pattern 09ch), there
can some afterimage in the black level area
3. Adjustment items
3.1 Board Level Adjustment
(1) Adjust RGB (ADC)
(2) EDID/DDC download
● Above adjustment items can be also performed in Final
Assembly if needed. Both Board-level and Final assembly
adjustment items can be check using In-Start Menu (1.
Adjust Check). Component 1080p and RGB-PC Adjust will
be calculated by 480i adjust value.
3.2. Final assembly adjustment
(1) White Balance adjustment
(2) RS-232C functionality check
(3) Factory Option setting per destination
(4) Shipment mode setting (In-Stop)
3.3. Appendix
(1) Shipment conditions
(2) Service Option Default
(3) USB Download (S/W Update, Option and Service only)
(4) ISP Download (Optional)
4. Automatic Adjustment
4.1. ADC Adjustment
4.1.1. Overview
▪ ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation.
4.1.2. Equipment & Condition
(1) Protocol: RS-232C
(2) Inner Pattern
- Resolution : 1080p (Inner Pattern)
- Resolution : 1024*768 RGB (Inner Pattern)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
4.1.3. Adjustment
4.1.3.1. Adjustment method
- Using RS-232, adjust items listed in 3.1 in the other shown
in “4.1.3.3”
4.1.3.2. Adj. protocol
Ref.) ADC Adj. RS232C Protocol_Ver1.0
4.1.3.3. Adj. order
▪aa 00 00 [Enter ADC adj. mode]
▪xb 00 60 [Change input source to RGB(1024*768)]
▪ad 00 10 [Adjust 1024*768 RGB]
▪ad 00 90 End adj.
Ref) ADC adj. RS232C Protocol_Ver1.0
Protocol
Command
Set ACK
Enter adj. mode
aa 00 00
a 00 OK00x
Source change
xb 00 40
xb 00 40
b 00 OK40x (Adjust 1080i Comp1 )
b 00 OK60x (Adjust 1024*768 RGB)
Begin adj.
ad 00 10
Return adj. result
OKx (Case of Success)
NGx (Case of Fail)
Read adj. data
(main)
ad 00 20
(sub )
ad 00 21
(main)
000000000000000000000000007c007b006dx
(Sub)
000000070000000000000000007c00830077x
Confirm adj.
ad 00 99
NG 03 00x (Fail)
NG 03 01x (Fail)
NG 03 02x (Fail)
OK 03 03x (Success)
End adj.
aa 00 90
a 00 OK90x
- 7 -
5. Manual Adjustment
5.1. ADC Adjustment
5.1.1. Overview
▪ ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation
5.1.2. Equipment & Condition
(1) Adjust Remocon
(2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern
Generator
- Resolution : 480i Comp1 (MSPG-925FA: model-209,
pattern-65)
- Resolution : 1024*768 RGB (Inner Pattern)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level: 0.7±0.1 Vp-p
- Image
- or Inner pattern
(3) Must use standard cable
5.1.3. Adjust method
5.1.3.1. ADC RGB
(1) Press the In-start Key on the ADJ remote after at least 1
min of signal reception. Then, select ADC Calibration. And
Press OK Button on the menu “Start”. The adjustment will
start automatically.
(2) If ADC RGB is successful, “ADC RGB Success” is
displayed and ADC RGB is completed.
If ADC calibration is failure, “ADC RGB Fail” is displayed.
(3) If ADC calibration is failure, after rechecking ADC pattern
or condition, retry calibration
5.2. EDID/DDC Download(EDID PCM)
5.2.1. 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”.
5.2.2. Equipment
(1) Adjust remocon.
(2) Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need
5.2.3. 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.
5.2.4. EDID DATA
(1) FHD Model
■ HDMI 1 FHD 8BIT (C/S : E9CF)
■ HDMI 2 FHD 8BIT (C/S : E9BF)
■ HDMI 3 FHD 8BIT (C/S : EACF)
■ RGB-FHD 8BIT (C/S : 02)
EDID Block 0, Bytes 0-127 [00H-7FH]
- 8 -
6. Final Assembly Adjustment
6.1. White Balance Adjustment
6.1.1. Overview
6.1.1.1. 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 ºC
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
▪ Before White balance adjustment, Keep power on status,
don’t power off
6.1.1.2. 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
- 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.
6.1.2. 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)
→ Only when internal pattern is not available
※ Color Analyzer Matrix should be calibrated using
CS-1000
6.1.3. Equipment connection MAP
6.1.4. 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 )
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. complete
*(wb 00 20(start), wb 00 2f(end)) -> Off-set adj.
wb 00 ff ->End white balance auto adj
(2) Adjustment Map
Applied Model : 26/32/37/42LT670H-UA
Adj. item
Command
(lower case ASCII)
Data Range
(Hex.)
Default
(Decimal)
CMD1
CMD2
MIN
MAX 172
Cool
R Gain
j
g
00
C0
172
G Gain
j
h
00
C0
192
B Gain
j
i
00
C0
64
R Cut
64
G Cut
64
B Cut
192
Medium
R Gain
j
a
00
C0
192
G Gain
j
b
00
C0
192
B Gain
j
c
00
C0
64
R Cut
64
G Cut
64
B Cut
192
Warm
R Gain
j
d
00
C0
192
G Gain
j
e
00
C0
172
B Gain
j
f
00
C0
64
R Cut
64
G Cut
64
Color Analyzer
Computer
Pattern Generator
※
Signal Source
Probe
RS-232C
RS-232C
RS-232C
※
If TV internal pattern is used, not needed
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