LG 26LC4R (CHASSIS:LP78A) Service Manual ▷ View online
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ADJUSTMENT INSTRUCTION
1. Application Range
This spec sheet is applied all of the 26/32/37/42” LCD
TV(LP78A) by manufacturing LG TV Plant all over the world.
TV(LP78A) by manufacturing 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 protect test instrument.
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
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.
there is no specific designation.
4) The input voltage of the receiver must keep 100~220V,
50/60Hz.
5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. Adjustment items
3.1. PCB assembly adjustment items
1) Download the VCTP main software (IC500,VCT_Pro)
2) Channel memory (IC501,EEPROM)
3) Color carrier Adjustment
2) Channel memory (IC501,EEPROM)
3) Color carrier Adjustment
3.2. SET assembly adjustment items
1) DDC Data input.
2) Adjustment of White Balance.
3) Factoring Option Data input.
2) Adjustment of White Balance.
3) Factoring Option Data input.
4. PCB assembly adjustment method
(Using VCTP Download program)
4.1. Download program installation
(1) Extract a Zip file
(2) Visual I2C & LPT Driver Installation
LPT Port Driver (LptDrv) Setups : Program Files > Micronas >
Visual I2C > Port_Driver
*Use for Windows 95/98 : Setup_LptDrv_v0104_9x.exe
*Use for Windows 2000/XP : Setup_LptDrv_v0202_XP_2000.exe
*Use for Windows NT : Setup_LptDrv_v0104_NT.exe
*Use for Windows 2000/XP : Setup_LptDrv_v0202_XP_2000.exe
*Use for Windows NT : Setup_LptDrv_v0104_NT.exe
(3) Verification (Start > Programs > Micronas > Visual I2C or
LptDrv)
(4) LPT delay setting(File > Preference > LPT preferences)
(5) Exchange the bootloader.bat file.
Install the LPT Driver
Install the Visual I2C
Install the Visual I2C
*LPT SETTING
- Delay => 1
- Time out => 500 ms
- Time out => 500 ms
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=> Select the "Bootloader.bat" file(install > VCTP_download >
Bootloader)
=> Push "OK"
=> Finish the program, after saving the file "download_cs.vi2c"
(if you click , the massage appears automatically)
4.2. S/W program download
(1) Download method 1 (PCB Ass’y)
1) Connect the download jig to D-sub jack
2) Execute ‘Download.vi2c’ program in PC, then a main
2) Execute ‘Download.vi2c’ program in PC, then a main
window will be opened
3) Double click the blue box and confirm "Bootloader
Version" as 42.
4) Click the "Erase Flash" button
5) Double click the download file low, then "edit" window
will be opened.
6) Click the choice button in the “edit window”, then “file
choice window” will be opened.
7) Choose the Hex file in folder and execute downloading
with click " open" button.
x
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8) Click OK button at the "edit window".
9) Under Downloading process
9) Under Downloading process
10) If download is failed, for example "No acknowledge
from slave". Execute download again from(1).
(2) Download method 2 (AV Plate Ass’y)
1) Push S/W ‘ON" (connect SCL to GND using switch at Jig
) and connect the download jig to D-sub jack.
2) Supply the power (Stand-by 5V) and wait for 3 seconds.
3) Push the S/W off (Disconnect SCL to GND using switch
at jig).
4) Execute ‘Download.vi2c’ program in PC, then a main
widow will be opened.
5) Double click the blue box and confirm "Bootloader
Version" as 42.
6) Click the "Erase Flash" button.
7) Double click the download file low then, "edit" window
will be opened.
8) Chick the choice button I n the "edit window", then "file
choice window’ will be opened.
Push S/W
Push S/W
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9) Choose the Hex file in folder and execute downloading
with click "open button".
10) Click OK button at the "edit window"
11) Under Downloading progress.
12) If download is failed, for example "No acknowledge
from slave", execute download again from (1).
(3) Download method 3 (SET)
1) Push the “Tilt” button in an Adjust Remote control Then
the LCD TV will change a “slave mode”.
2) Connect Zig to TV using a D-sub cable.
3) Execute ‘Download_CS.vi2c’ program in PC, then a
main widow will be opened.
4) Click "GO" button.
If you don’t push the “go”, the Hex file would not be
downloaded although the download proceeds normally
at first glance.
downloaded although the download proceeds normally
at first glance.
5) Double click the blue box and confirm "Bootloader
Version" as 42.
6) Click the "Erase Flash" button
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