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12 109B2 GS3 CM25 DDC Instructions
Go to cover page
1. General 3. Pin assignment
DDC Data Re-programming
A. 15-pin D-Sub Connector
In case the main EEPROM with Software DDC 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 with Software DDC 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. The 15-pin D-sub connector (male) of the signal cable
on the 3rd row for DDC feature :
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.
1 5
DDC EDID structure 6 10
For the monitor : Standard Version 3.0 11 15
Structure Version 1.2
2. System and equipment requirements
1. An i486 (or above) personal computer or compatible.
2. Microsoft operation system Windows 95/98. Pin No. Assignment
3. EDID301.EXE program (3138 106 10103) shown as Fig. 1 1 Red video input
4. Software DDC Alignment kits (4822 310 11184) shown as Fig. 2.
The kit contents: a. Alignment box x1 2 Green video input
b. Printer cable x1 3 Blue video input
c. D-Sub cable x1
4 Identical output - connected to pin 10
Note: The EDID301.EXE (Release Version 1.54, 2000.04.25)is a 5 Ground
windows-based program, which cannot be run in MS-DOS. 6 Red video ground
7 Green video ground
8 Blue video ground
9 No pin
10 Logic ground
11 Identical output - connected to pin 10
12 Serial data line (SDA)
13 H. Sync / H + V
EDID301.EXE
Ver:1.54 14 V. Sync (VCLK for DDC)
15 Data clock line (SCL)
Figure 1 Diskette with EDID301.EXE
DC 8V~12V Power indicator
To Monitor To Printer
Video Card
Fig. 2 Alignment Kits
Back Forward
DDC Instructions (Continued) 109B2 GS3 CM25 13
Go to cover page
4. Configuration and procedure Re-programming Software DDC
Following descirptions are the connection and procedure for Software Step 1: After initialize alignment box, connecting all cables and box as
DDC, the main EEPROM can be re-programmed along with Software Fig. 3
DDC by enabling "factory memory data write" function on the DDC Step 2: Follow the steps on DDC re-programming instructions to staring
program (EDID301.EXE). re-programming.
Rear view of the monitor
PC
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
To printer port (LTP1)
show you the procedures and connection.
Step 1: Supply 8~12V DC power source to the Alignment box by DC Power
To video card
8~12 V
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. Video cable
This is for initialize alignment box.
To
Monitor
Printer
Port
To PC
Fig. 3
5. DDC re-programming instructions
Start on DDC program
Rear view of the monitor 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.
Video cable
PC
To printer port (LTP1)
DC Power
To video card
8~12 V
~
4. At the submenu, type the letter of your computer's floppy disk drive
followed by :EDID301 (for example, A:\EDID301, as shown in Fig. 5).
To
Monitor
Printer
Port
To PC
Fig. A
A:\edid301