LG 42LB7RF (CHASSIS:LP7AA) Service Manual ▷ View online
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ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LP7AA chassis(H4)
manufactured at LG TV Plant all over the world.
manufactured at LG TV Plant all over the world.
2. Specification
2.1 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.
transformer will help to protect test instruments.
2.2 Adjustment must be done in the correct sequence.
2.3 The adjustment must be performed at 25 ± 5°C
2.3 The adjustment must be performed at 25 ± 5°C
temperature and 65 ± 10%, relative humidity if there is no
specified designation.
specified designation.
2.4 The input voltage of the receiver must be kept between
100~220V, 50/60Hz.
2.5 Before adjustment, execute Heat-Run for 30 minutes at
FULL WHITE MODE(power on key)
3. Adjustment items
3.1 PCB assembly adjustment items
•
l Channel memory
- Download the channel data from BOM to EEPROM by
using LGIDS.
•
l Option adjustment following BOM
- Tool Option1
- Tool Option2
- Area Option
- Tool Option2
- Area Option
(Fig. 1)
1) Push the ADJ 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
/
°„/°Â(CH+/-) key , and press the number key(0~9)
consecutively
ex) If the value of Tool Option1 is 7, input the data using
number key "7" (Fig. 1)
3.2 SET assembly adjustment items
•
Auto AV1 Color Balance
•
Adjustment of White Balance
•
Auto Component Color Balance adjustment
- standard equipment : MSPG925FA
•
Auto RGB Color Balance adjustment
-standard equipment : MSPG925FA
4. EDID
4.1 Caution
* Use the proper signal cable for EDID Downloa.
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
*Caution: - Never connect HDMI & DVI-D & DVI-A Cable at
the same time.
- Use the proper cables below for EDID Writing
- Write 8bit using DDC2B protocol to input
- Write 8bit using DDC2B protocol to input
ANALOG,HDMI EDID.
4.1.1 EDID Data
4.2 Datos
4.2.1. 47LB7RF ANALOG
•
BLOCK1 (128BYTE)
4.2.2. 47LB7RF HDMI1
•
BLOCK1 (128BYTE)
•
BLOCK2 (128BYTE)
No
Item
Condition
16 Data
1 Manufacturer ID
GSM
1E6D
2 Version
Digital: 1
01
3 Revision
Digital: 3
03
4.2.3. 47LB7RF HDMI2
•
BLOCK1 (128BYTE)
•
BLOCK2 (128BYTE)
4.2.4. 42LB7RF ANALOG
•
BLOCK1 (128BYTE)
4.2.5. 42LB7RF HDMI1
•
BLOCK1 (128BYTE)
•
BLOCK2 (128BYTE)
4.2.6. 42LB7RF HDMI2
•
BLOCK1 (128BYTE)
•
BLOCK2 (128BYTE)
=> Detail EDID Options are below (a, b, c, d, e).
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) Montly: ‘03’ => ‘03’
Year: ‘2005’ => ‘0F’
d. Model Name/Monitor Name
e. Checksum: Changeable by total EDID data
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Modelo
Núm. de
productoNúm. de identificación del producto
identificación del
Dec.
Hex.
Tabla EDID
42LB7RF
40085(A)
40087
9C97
959C
40086(D)
40088
9C98
989C
47LB7RF
40083(A)
40091
9C9B
9B9C
40084(D)
40092
9C9C
9C9C
Modelo
42LB7RF 00 00 00 FC 00 34 32 4C 42 37 52 46 2D 54 41 0A 20 20
47LB7RF 00 00 00 FC 00 34 37 4C 42 37 52 46 2D 54 42 0A 20 20
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5. ADC Calibration
5.1 Adjustment of AV
* Required Equipments
•
Remote controller for adjustment
•
802F Pattern Generator, Master (MSPG-925FA), etc
•
MSPG-925FA Pattern Generator
(Which has Video Signal: 100% Color Bar Pattern
shown in Fig. 1)
=> Model: 202 / Pattern: 65 (PAL : CH).
Model: 207 / Pattern : 65 (NTSC-J).
(Fig. 1)
5.1.1 Method of Auto AV Color Balance
1) Press the FRONT-AV KEY on R/C for converting input
1) Press the FRONT-AV KEY on R/C for converting input
mode.
2) Input the Video Signal: 100% Color Bar signal into
AV(MA/TA)
3) Set the PSM to Dynamic mode in the Picture menu
4) Press INSTART key on R/C for adjustment
5) Press the
4) Press INSTART key on R/C for adjustment
5) Press the
(Vol. +) key to operate the set, then it
becomes automatically
6) Auto-RGB OK means the adjustment is completed
5.1.2 Requirement
•
This AV color balance adjustment should be performed
before White Balance Adjustment.
5.2 Adjustment of Component.
* Required Equipments
•
Remote controller for adjustment.
•
802F Pattern Generator, Master (MSPG-925FA), etc.
•
MSPG-925FA Pattern Generator
(Which has 720p@50Hz YPbPr signal : 100% Color
Bar Pattern shown in Fig. 2).
Bar Pattern shown in Fig. 2).
=> Model: 215 / Pattern: 65
•
It is very import to use correct adjustment pattern like
Fig. 2.
# If Minimum Black Level and/or Maximum White Level
is not correct, Do select 100% Color Bar Pattern.
(Fig. 2)
5.2.1 Method of Auto Component Color Balance
1) Input the Component 720p 100% Color Bar(MSPG-925FA
1) Input the Component 720p 100% Color Bar(MSPG-925FA
model:215, pattern:65) signal into Component ( ZA :
component , TA/MA : component 1 or 2)
component , TA/MA : component 1 or 2)
2) Set the PSM to Dynamic mode in the 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
(Vol. +) key to operate the set , then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed
5.3 Adjustment of RGB)
* Required Equipments
•
Remote controller for adjustm
•
802F Pattern Generator, Master (MSPG-925FA), etc
•
MSPG-925FA Pattern Generator
(Which has XGA [1024*768] 60Hz PC Format output
signal : 100% Color Bar Pattern shown in Fig. 3 )
•
It is very import to use correct adjustment pattern like
Fig. 10.
# If Minimum Black Level and/or Maximum White Level
is not correct, Do select 100% Color Bar Pattern.
(Fig. 3)
5.3.1 Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz with 100% color bar
1) Input the PC 1024x768 @ 60Hz with 100% color bar
pattern like Fig.3. into RGB.
2)
Set the PSM to Dynamic mode in Picture menu
3) Press the INSTART key on R/C for adjustment.
4) Press the
4) Press the
(Vol. +) key operate To set , then it becomes
automatically
5) Auto-RGB OK means adjustment is completed
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6. White Balance
*Notice
- Before white balance,press the In-start key 2times and do
the reset like Fig1.
- Use the cortez inner pattern(216 gray pattern)
- To enter White-balance mode,press the IN-START key
- To enter White-balance mode,press the IN-START key
2times.
=> Caution : - System control RS-232 Host should be "PC"
for adjustment.
* Test Equipment
- Color Analyzer ( CA-210)
- PC (for communication through RS-232C) Ë UART
- PC (for communication through RS-232C) Ë UART
Baud rate : 115200
- Pattern Generator (MSPG-925FA etc.)
* When adjusting the Color Temperature of LCD, Color
AnalyzerCA-210(Matrix should be corrected through CH9 of
CS-1000) should be used.
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
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
6.1 Manual white Balance (INNER PATTERN)
1) Execute CA-210(9CH) Zero Calibration
2) Execute the SET Heat Run for 30minutes
3) Use cortez inner pattern as below Fig. 4, Supply 216Level
2) Execute the SET Heat Run for 30minutes
3) Use cortez inner pattern as below Fig. 4, Supply 216Level
(85 IRE) full screen pattern
4) Enter the White Balance adjustment mode by pressing the
INSTART 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
/
(CH+/-) key
on R/C.
6) Adjust with R / G / B Gain using
/
key on R/C.
7) Adjust it until color coordination becomes as below.
*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)
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
-When B Gain is Fixed at Default value(80)
Adjust R gain and G gain with decreasing Default values from 80
-When G Gain is Fixed at Default value(80)
Adjust R gain and B gain with decreasing Default values from 80
Adjust R gain and G gain with decreasing Default values from 80
-When G Gain is Fixed at Default value(80)
Adjust R gain and B gain with decreasing Default values from 80
R/G/B Gain and R/G/B Offset Default Value
Red Gain : 80 , Green Gain : 80, Blue Gain : 80
Red Gain : 80 , Green Gain : 80, Blue Gain : 80
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