Ddc Instructions - Philips 202P70/00 Service Manual

General
DDC Data Re-programming
In case the DDC data memory IC or main EEPROM which storage all
factory settings were replaced due to a defect, the serial numbers have
to be re-programmed"Analog DDC IC, & EEPROM".
It is advised to re-soldered DDC IC and 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.
System and equipment requirements
1. An i486 (or above) personal computer or compatible.
2. Microsoft operation system Windows 95/98 .
Y ou have t o Install the EDID_PORT_Tool under Win2000/XP . As
Fig. 1 .
A. Cody the "UserPort.sys" to C:\WINNT\system32\drivers(win2000)
B. Running " io.exe" everytime, Before you start to programming
edid data .
3. EDID46.EXE program (12NC: 3138 106 10103) .
4. A/D Alignment kits (12NC: 3138 106 10396) shown as Fig. 2:
inclusion : a. Alignment box x1
b. Printer cable x1
c. (D-Sub) to (D-Sub) cable x1
d. (DVI-D) to (D-Sub) cable x1
Note: The EDID46.EXE is a windows-based program, which cannot
be run in MS-DOS.

DDC Instructions

C:\WINDOWS\system32\drivers(winXP)
Pin assignment
15 -pin D-Sub Connector
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Configuration and procedure
There is no Hardware DDC (DDC IC) anymore. Main EEPROM stores
all factory settings and DDC data (EDID code) which is also called
Software DDC. The following section describes the connection and
procedure for Software DDC application. The main EEPROM can be re-
programmed by enabling '' factory memory data write'' function on the
DDC program (EDID46.EXE).
Fig. 1
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
(EDID46.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 .
Step 2: Connecting printer cable and D-Sub cable of monitor as Fig. 3
PC
Fig. 2
202P7 CRT
Go to cover page
SIGNAL
Red video input
Green video input / sync on green
Blue video input
GND
GND -Cable detect
Red video GND
Green video GND
Blue video GND
DDC +3.3V or +5V
Logic GND
GND
Serial data line (SDA)
H-sync / H+V
V-sync
Data clock line (SCL)
1=Power connector
2=D-SUB connector
DC Power
8-12 V
~ ~
1
To
Monitor
Printer
Port
To PC
Fig. 3
23
2