LG 32LG50D (CHASSIS:LT81D) Service Manual ▷ View online
- 9 -
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to Singapore DTV manufactured at
LG TV Plant all over the world.
LG TV Plant all over the world.
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 to
protect test instruments
However, the use of isolation transformer will help to
protect test instruments
2) Adjustment must be done in the correct sequence.
3) The adjustment must be performed at 25±5°C temperature
3) The adjustment must be performed at 25±5°C temperature
and 65±10% relative humidity if there is no specified
designation.
designation.
4) The input voltage of the receiver must be kept between
100-220V~, 50/60Hz.
5) Before adjustment, execute Heat-Run for 5 minutes at Full
White mode.(Power on key)
3. ADC Calibration
<Caution>
- System control RS-232 Host should be “PC” for adjustment.
- Press the FRONT-AV key on R/C for converting input mode.
- System control RS-232 Host should be “PC” for adjustment.
- Press the FRONT-AV key on R/C for converting input mode.
(change RS-232 Host:pc, BaudRate:115200bps)
3.1. Adjustment of RF/AV/S-VIDEO
(1) Required Equipments
1) Remote controller for adjustment
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925FA Pattern Generator (Which has Video
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925FA Pattern Generator (Which has Video
Signal : 100% Color Bar Pattern shown in Fig. 1)
-> Model: 202 / Pattern : 65
(2) Method of Auto RF/AV/S-VIDEO Color Balance.
1) Press the FRONT-AV key on R/C for converting input
mode.
2) Input the Video Signal: 100% Color Bar signal into AV
3) Set the PSM to Vivid mode in the Picture menu.
4) Press ADJ key on R/C for adjustment.
5) Press the
3) Set the PSM to Vivid mode in the Picture menu.
4) Press ADJ key on R/C for adjustment.
5) Press the
G
(Vol. +) key to operate the set, then it
becomes automatically.
6) Auto-RGB OK means the adjustment is completed.
3.2. Adjustment of Component.
(1) Required Equipments
1) Remote controller for adjustment
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925FA Pattern Generator(Which has 720p@60Hz
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925FA Pattern Generator(Which has 720p@60Hz
YPbPr signal : 100% Color Bar Pattern shown in Fig. 1)
-> Model: 217 / Pattern: 65
4) It is very import to use correct adjustment pattern like Fig.1).
# Within the pattern, color sequence should be aligned
: White-Yellow-Cyan-Green-Gray-Red-BLUE-BLACK
(If color sequence is reversed (Black -> …-> White),
reverse the pattern with REV key, when using Master
pattern generator like MSPG-925)
# If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
: White-Yellow-Cyan-Green-Gray-Red-BLUE-BLACK
(If color sequence is reversed (Black -> …-> White),
reverse the pattern with REV key, when using Master
pattern generator like MSPG-925)
# If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
(2) Method of Auto Component Color Balance
1) Input the Component1 720p 100% Color Bar (MSPG-
925FA model:217, pattern:65) signal into Component.
2) Set the PSM to Vivid mode in the Picture menu.
3) Press the ADJ key on R/C for adjustment.
4) Press the
3) Press the ADJ key on R/C for adjustment.
4) Press the
G
(Vol. +) key to operate the set, then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
3.3. Adjustment of RGB
(1) Required Equipments
1) Remote controller for adjustment
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925F Pattern Generator
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925F Pattern Generator
(Which has XGA [1024*768] 60Hz PC Format output
signal : 100% Color Bar Pattern shown in Fig. 1).
signal : 100% Color Bar Pattern shown in Fig. 1).
4) It is very import to use correct adjustment pattern like Fig.1.
# Within the pattern, color sequence should be aligned :
White-Yellow-Cyan-Green-Magenta-Red-BLUE-BLACK (If
color sequence is reversed (Black -> …-> White), reverse
the pattern with REV key, when using Master pattern
generator like MSPG-925)
# If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
White-Yellow-Cyan-Green-Magenta-Red-BLUE-BLACK (If
color sequence is reversed (Black -> …-> White), reverse
the pattern with REV key, when using Master pattern
generator like MSPG-925)
# If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
(2) Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz with 100% color bar
pattern like Fig.1. into RGB.
(Ex. MSPG-925FA, model:60, pattern:65)
2) Set the PSM to Vivid mode in Picture menu.
3) Press the INSTART key on R/C for adjustment.
4) Press the
3) Press the INSTART key on R/C for adjustment.
4) Press the
G
(Vol. +) key operate To set , then it becomes
automatically.
5) Auto-RGB OK means adjustment is completed.
Cause: Don’t Push “In-stop” key after PCB assembly
adjustment.
ADC
RF/AV/S-VIDEO
Component
RGB-PC
MSPG925FA PAL
Model:217 (720P)
Model: 60
INPUT SELECT AV1
Pattern:65
(1024*768 60Hz)
Model: 202 (PAL-BGDHI) * 100% Color Bar
Pattern: 65
Pattern: 65
*100% Color bar
* 100% Color Bar
<Fig. 1>
4. SET assembly adjustment items
(1) Option adjustment following BOM
- Tool Option1
- Tool Option2
- Area Option
- Tool Option2
- Area Option
1) Push the IN-START key in the Adjust Remocon.
2) Input the Option Number that was specified in the BOM,
2) Input the Option Number that was specified in the BOM,
into the Shipping area.
3) Select Tool Option1/ Tool Option2/ Area Option” by
using
D
/
E
(CH+/-) key, and press the number key (0~9)
consecutively
ex) If the value of Tool Option1 is 0, input the data using
number key “0” (Fig. 1)
Cause: Don’t Push “In-stop” key after PCB assembly
adjustment.
(2) Adjustment of White Balance
(3) It’s unnecessary to download the serial number & the
model name for Diagnostics of DTV Mode.
Note) Option Data [Tool Option 1 / Tool Option 2 / Area Option]
Singapore : 32LG50D-GD [20994 / 0 / 0]
5. EDID
* Caution
1) Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
- Digital EDID : Pin3 exists
2) Never connect HDMI & DVI-D & DVI-A Cable at the
same time.
3) Use the proper cables below for EDID Writing.
4) HDMI 1 and HDMI2 is different each other. So You have
4) HDMI 1 and HDMI2 is different each other. So You have
to Download different EDID file.
5) Don’t connect the RS-232C Cable for EDID Download.
5.1. EDID Data
5.2. Data
(1) ANALOG (128 bytes)
(2) HDMI 1 (256 bytes)=>
- Block 1 (128 byte)
- Blcok 2 (128 byte)
(3) HDMI 2 (256 bytes)
Block 1 (128byte)
Block 2 (128 byte)
=> Detail EDID Options are below (a, b, c, d, e, f)
- 10 -
LT81D
LPL
42 FHD
S/W Version
x.xx
STI Version
x.xx.x
UTT
XX hr.
Tool Option1
20993
Tool Option2
0
Area Option
20
:
For Analog EDID
D-sub to DVI-I
For Digital EDID
DVI-D to DVI-D
For HDMI EDID
DV-D to HDMI or HDMI to HDMI
Item
Manufacurer ID
Version
Revision
Condition
GSM
Digital : 1
Digital : 3
Data(Hex)
1E6D
01
03
- 11 -
a) Product ID
b) Serial No: Controlled on production line.
c) Month, Year: Controlled on production line:
c) Month, Year: Controlled on production line:
ex) Monthly : ‘03’ -> ‘03’
Year : ‘2005’ -> ‘0F’
d) Model Name(Hex):
e, f) Checksum: Changeable by total EDID data.
* Before White-balance, the AV ADC should be done.
6. White Balance
Caution : Before White-balance, the AV ADC should be done.
<Notice>
- Do the white balance adjustment under the 10LUX
- Before white balance, press the ADJ key 2times and do the
- Do the white balance adjustment under the 10LUX
- Before white balance, press the ADJ key 2times and do the
reset like Fig.2
- Use the Torino inner pattern (216 gray pattern)
-To enter White-balance mode, press the ADJ key 2times.
-To enter White-balance mode, press the ADJ key 2times.
Caution - System control RS-232 Host should be “PC” for
adjustment.
[Test Equipment]
- Color Analyzer (CA-110)
- CA-210
- Color Analyzer (CA-110)
- CA-210
PC (for communication through RS-232C) -> UART Baud rate
: 115200
Pattern Generator (MSPG-925FA etc. )
: 115200
Pattern Generator (MSPG-925FA etc. )
[Color Temperature & Color Coordinates Setting]
When adjusting the Color Temperature of LCD, Color
AnalyzerCA-210(Matrix should be corrected through CH9 of
CS-1000) should be used.
Adjust the Color Temperature based below adjustment color
coordinates.
Even if CH9 of CA-210 is corrected with Matrix, there may be
many character of Module and Filter.
Therefore Refer to the below Color Coordinates Target.
But, in case of WCG module, use the CH12 of CA-210.
When adjusting the Color Temperature of LCD, Color
AnalyzerCA-210(Matrix should be corrected through CH9 of
CS-1000) should be used.
Adjust the Color Temperature based below adjustment color
coordinates.
Even if CH9 of CA-210 is corrected with Matrix, there may be
many character of Module and Filter.
Therefore Refer to the below Color Coordinates Target.
But, in case of WCG module, use the CH12 of CA-210.
* Target Value CA-210 (CH 9)
(R/G/B gain and R/G/B offset Default values are different in
according to using module )
according to using module )
* LCD : Target Value of Brightness, Color Coordinates, Color
Temperature
Brightness : High Light
: MIN 200 Cd/m
: MIN 200 Cd/m
2
(32 WXGA, LPL)
MIN 200 Cd/m
2
(37 WXGA, LPL)
MIN 200 Cd/m
2
(42 WXGA,WUXGA, LPL)
MIN 200 Cd/m2 (47 WUXGA, LPL)
Color-Coordinate : High Light
: Cool : X ; 0.276 ±0.002 ,Y ; 0.283 ±0.002
: Cool : X ; 0.276 ±0.002 ,Y ; 0.283 ±0.002
Warm : X ; 0.313 ±0.002,Y ; 0.329 ±0.002
Color Temperature
: 11,000K±500K(Cool), 6,500K ±500K(Warm)
: 11,000K±500K(Cool), 6,500K ±500K(Warm)
6.1. Manual white Balance (INNER Pattern)
For White Balance, Adjust twice, Cool and Warm
1) Execute CA-210(9CH, 10CH and 12CH) or CA-100 Zero
Calibration. (In case of WCG module,CH12 and PDP,
CH10)
CH10)
2) Execute the SET Heat Run for 30minutes
3) Use torino inner pattern as below Fig. 3, Supply 216Level
3) Use torino inner pattern as below Fig. 3, Supply 216Level
(85 IRE) full screen pattern
4) Enter the White Balance adjustment mode by pressing the
ADJ key twice(White Balance) on R/C.
5) Stick sensor to center of the screen and select each items
(Red/Green/Blue Gain and Offset) using
D
/
E
(CH +/-) key
on R/C..
6) Adjust with R/G/B Gain using
F
/
G
(VOL +/-) key on R/C.
7) Adjust it until color coordination becomes as below.
After All adjustment is completed, Please push “In-stop” key.
* Color Temperature : Cool, Medium, Warm
One of R/G.B Gain should be fixed at 80 and adjust two Gain
Value with decreasing the Default values from 80.
- When R Gain is Fixed at Default value(80)
One of R/G.B Gain should be fixed at 80 and adjust two Gain
Value with decreasing the Default values from 80.
- When R Gain is Fixed at Default value(80)
Adjust G gain and B gain with decreasing Default values
from 80
from 80
- When B Gain is Fixed at Default value(80)
Adjust R gain and G gain with decreasing Default values
from 80
from 80
- When G Gain is Fixed at Default value(80)
Adjust R gain and B gain with decreasing Default values
from 80
from 80
R/G/B Gain and R/G/B Offset Default Value
Red Gain : 80, Green Gain : 80, Blue Gain : 80
Red Offset : 80, Green Offset : 80, Blue Offset : 7D
Red Gain : 80, Green Gain : 80, Blue Gain : 80
Red Offset : 80, Green Offset : 80, Blue Offset : 7D
EDID Model
Product - ID
HEX
EDID Table
DDC Function
32LG50D-GD
3033
7619
0x19, 0x76
Analog
CSM
Temp.
x
y
∆UV
Cool
11,000k
0.276±0.002
0.283±0.002
+0.000
Warm
6,500k
0.313±0.002
0.329±0.002
+0.003
Model
LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
White Balance(Hex)
Color Temp.
Medium
Red Gain
80
Green Gain
80
Blue Gain
80
Red Offset
80
Green Offset
80
Blue Offset
7D
Reset
G
To set
<Fig. 2>
6.2. Auto white Balance (INNER PATTERN)
- 12 -
<Fig. 3>
216 Level (85 IRE)
command1 command2 Set ID
Data
MODE
Input Select
x
b
00
00h
DTV-Air
01h
Cable
10h
RF-Air
11h
Cable
20h
AV1
21h
AV2
40h
COMP1
41h
COMP1
60h
RGB-PC
90h
HDMI
Min
Max
INIT
R-Gain_Normal
j
a
00
00h
80h
80h
G-Gain_Normal
j
b
00
00h
80h
80h
B-Gain_Normal
j
c
00
00h
80h
80h
R-Gain_Warm
j
d
00
00h
80h
80h
G-Gain_Warm
j
e
00
00h
80h
80h
B-Gain_Warm
j
f
00
00h
80h
80h
R-Gain_Cool
j
g
00
00h
80h
80h
G-Gain_Cool
j
h
00
00h
80h
80h
B-Gain_Cool
j
i
00
00h
80h
80h
R-Offset_Normal
l
j
00
00h
80h
G-Offset_Normal
l
k
00
00h
80h
B-Offset_Normal
l
l
00
00h
80h
R-Offset_Warm
l
m
00
00h
80h
G-Offset_Warm
l
n
00
00h
80h
B-Offset_Warm
l
o
00
00h
80h
R-Offset_Cool
l
p
00
00h
80h
G-Offset_Cool
l
q
00
00h
80h
B-Offset_Cool
l
r
00
00h
80h
COLOR TEMP.
k
u
00
00h
03h(Cool,Normal,Warm,User)
w
b
00
00
W/B Adjustment Start
Signal
10
ff
W/B Adjustment Comletion
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