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DDC Instructions
1. General
DDC Data Re-programming
In case the main EEPROM with which store all factory
settings were replaced because a defect,repaired monitor the serial
numbers have to be re-programmed.
It is advised to re-soldered the main EEPROM from the old board onto
the new board if circuit board have been replaced, in this case the DDC
data does not need to be re-programmed.
Additional information
Additional information about DDC (Display Data Channel) may be
obtained from Video Electronics Standards Association (VESA).
Extended Display Identification Data(EDID) information may be also
obtained from VESA.
DDC EDID structure
For the monitor : Standard Version 3.0
Structure Version 1.2
Software DDC
2. System and equipment requirements
1. An i486 (or above) personal computer or compatible.
2. Microsoft operation system Windows 95/98.
3. EDID301.EXE program (3138 106 10103) shown as Fig. 1
4. Software DDC Alignment kits (4822 310 11184) shown as Fig. 2.
The kit contents: a. Alignment box x1
Note: The EDID301.EXE (Release Version 1.55,)is a windowsbased program, which cannot be run in MS-DOS.
b. Printer cable x1
c. D-Sub cable x1
3. Pin assignment
A. 15-pin D-Sub Connector
The 15-pin D-sub connector (male) of the signal cable
on the 3rd row for DDC feature :
1
6
11
Pin No.
1
2
3
4
5
6
7
8
Assignment
Red video input
Green video input
Blue video input
Identification output Connected to pin 10
Ground
Red video ground
Green video ground
Blue video ground
Pin No.
9
10
11
12
13
14
15
No pin
Logic ground
Identification output Connected to pin 10
Serial data line(SDA)
H.Sync
V.Sync(VCLK for DDC)
Data clock line(SCL)
5
10
15
Assignment
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Figure 1
Diskette with EDID301.EXE
Fig. 2 Alignment Kits
EDID301.EXE
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4. Configuration and procedure
DDC Instructions
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Following descirptions are the connection and procedure for Software
DDC, the main EEPROM can be re-programmed with Software DDC
by enabling "factory memory data write" function on the DDC program
(EDID301.EXE).
Initialize alignment box
In order to avoid that monitor entering power saving mode due to
sync will cut off by alignment box, it is necessary to initialize
alignment box before running programming software
(EDID301.EXE). Following steps show you the procedures and
connection.
Step 1: Supply 8~12V DC power source to the Alignment box by
plugging a DC power cord or using batteries.
Step 2: Connecting printer cable and video cable of monitor as Fig. A
Step 3: Run the EDID301.EXE program until the main menu appears.
This is for initialize alignment box.
Step 4: Press and button when turn on the monitor, to enter factory
mode.
Rear view of the monitor
Rear view of the monitor
PC
DC Power
8~12 V
To video card
To printer port (LTP1)
Printer
Port
To
Monitor
To PC
Video cable
5. DDC re-programming instructions
Start on DDC program
Start Microsoft Windows.
1. Insert the disk containing EDID301.EXE program into floppy disk
drive.
2. Click , choose Run at start menu of Windows 95/98.
PC
DC Power
8~12 V
To video card
Re-programming Software DDC
Step 1: After initialize alignment box, connecting all cables and box as
Fig. 1
Step 2: Follow the steps on DDC re-programming instructions to starting
re-programming.
To printer port (LTP1)
Fig. A
Video cable
3. At the submenu, type the letter of your computer's floppy disk drive
followed by :EDID301 (for example, A:\EDID301, as shown in Fig. 2).
ô
Fig. 2
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4. Click button. The main menu appears (as shown on Fig. 3).
Fig. 3
Note: If the connection is improper, you will see the following error
message before entering the main menu. Meanwhile, the
(read EDID) function will be disable. At this time, please make
sure all cables are connected correctly and fixedly, and the
procedure has been performed properly.
DDC Instructions
Command bar
Tools bar
Note: During the loading, EDID301 will verify the EDID data which just
loaded from monitor before proceed any further function, once
the data structure of EDID can not be recognized, the following
error message will appear on the screen (Fig. 5). Please confirm
following steps to avoid this message.
1. The data structure of EDID was incorrect.
2. Software DDC Data that you are trying to load data is empty.
3. Wrong communication channel has set at configuration setup
windows.
4. Cables loosed or poor contact of connection.
.
Loading DDC data from monitor
1. Click icon on the tools bar to bring up the Configuration Setup
windows as Fig.4
2. Select the DDC2B as the communication channel.
3. Enable Factory memory data write function and fill in page address
F"F0" to the block.
4.. Click button to confirm your selection.
Note: At this moment, please don't enable"software DDC only" function
yet.
Fig. 5
Modify DDC data (Serial No.)
1. Click icon on the toosl bar.
2. Click till the Step 7 of 9 window appears.
3. Type the new Serial No. (for example, TY 123456).
4. Click till the last step window appears, then click to
exit the Step window.
Fig. 4
5. Click icon to read DDC EDID data from monitor. The EDID
codes will display on screen as following. (The EDID codes are
dependent on the model.)
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DDC Instructions
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Write DDC data to monitor
1. Enable " software DDC" function at configuration setup windows.
2. Click icon from the tools bar to starting rewrite DDCdata.
3. Click for confirmation.
Save DDC data as a file
Sometimes, you maybe need to save DDC data as a text file for using
on other DDC chip. To save DDC data, follow the steps below:
1. Click icon on the tools bar and type a file name you like. The
file format is ddc type which can be open by Microsoft WordPad.
2. Click button.
Exit DDC program
1. Click file command on the command bar then select Exit.
Definition of Serial Number
TY009928000001
Serial Number (U.S.A: 8 digit)
Week
Year
TY Code
TY----Chungli
CX----Dong Guan
HD----Hungary
BZ----Suzhou
(Others regions: 6 digit)
Load DDC data from file
1. Click from the tools bar.
2. Select the file you want to open.
3. Click . Button.
4. Now you can re-programming DDC data which you just loaded
from a file, please be confirmed that model and serial number are
correct and match with the monitor you are trying to re-write.
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