IBM Computer Monitor 9503 T221 User Manual

IBM 9503-T221 LCD monitor  
Updating the EDID settings for your monitor (R1.3)  
Introduction  
Modern monitors internally store data on their performance characteristics and capabilities in an  
abbreviated format. The information is called the monitor Extended Display Identification Data or EDID  
and is read by operating systems and video graphics cards to determine the optimum display properties  
for the system. The IBM T221 is a very advanced and flexible monitor and it exceeds the capability of the  
EDID system to describe it fully. Special OSD menu allows alternate EDIDs to be selected which are  
more suitable for certain graphics cards.  
Unless you change the video graphics card that drives your monitor, there is usually no need to change  
the EDID settings.  
The EDID update procedure must be done carefully. If an incorrect EDID is selected, it is possible that  
the monitor may not display any images afterwards.  
Applicable model: All models with the following firmware level  
The procedure given in this document applies to monitors with firmware at the following levels:  
DDC CPU  
OSD CPU  
USB CPU  
Version 3.2 or higher  
Version 5.0 or higher  
Version 4.0 or higher  
Version 34 or higher  
FPGA LOGIC  
To check the versions, see page 2. If you need to change the settings on a monitor that has firmware at a  
lower level, refer to the IBM technical support website for the T221 monitor.  
1. Setting  
a. Connect the monitor to the desired graphics card and/or computer system.  
b. Turn on the monitor and the computer. Wait until the system has completed its boot process and a  
stable screen image is displayed. Confirm that the power indicator on the monitor shows green.  
If there is no image displayed and the power indicator shows steady amber, press the Debug switch to  
turn on the monitor (see the following figure), the power indicator will show blinking amber. The video  
image fromthe computer will not appear but the screen will display a sequence of test patterns.  
CAUTION:  
Do not use conductive material to  
press this switch. It may damage the  
electric circuit inside of the monitor.  
Page 1 of 4  
 
IBM 9503-T221 LCD monitor  
Updating the EDID settings for your monitor (R1.3)  
4. Changing the EDID setting  
a. From the table in the ‘Valid settings’ section, choose the number of the EDID setting you want to  
use.  
b. Set the brightness level to the number for the EDIDsetting you have chosen (see user’s guide), you  
can choose values from 0 to 20. For higher numbers, firstly enable the special OSD menu and then exit it  
by using the ‘select/enter’ button. The brightness range will now extend from 0 to 63, as in this example:  
c. Navigate back to the first panel of the special OSD menu.  
d. Press the ‘navigate left’ or ‘navigate right’ buttons to show panel 2. Then press both ‘navigate’  
buttons together, and hold them down until three dots appear on the display. The three dots show that the  
EDID setting is in the process of being updated.  
e. Within about five seconds, the number of the new EDID setting stored in the monitor will be  
displayed. If it is not the setting number you want, try again.  
Note: An attempt to enter any unsupported setting number will fail.  
If the setting number ends in ‘x, the update procedure has failed. Try again.  
f. Turn off the monitor to disable the special OSD menu and return to normal operation.  
Important notices  
If the monitor is connected to a powered-off computer system, or if the screen resolution is changed, it  
will not be possible to program a new EDID setting.  
The EDID setting cannot be reset to the original number as for the factory default values by the  
procedure given in this manual. To reset the EDID to an equivalent value to the factory default, check  
your T221 model and choose the appropriate number as below, then update the setting.  
T221 Model DG1: Setting number 20  
T221 Model DG3: Setting number 29  
Page 3 of 4  
 
IBM 9503-T221 LCD monitor  
Updating the EDID settings for your monitor (R1.3)  
Valid settings  
The DDC-CPU firmware that performs the EDID setting process within the monitor can only detect  
and update certain types of EDID setting. If it encounters a setting it does not recognize, it reads it as 000  
(unknown).  
From the following table, choose the EDID setting that is appropriate for the operating system and  
video graphics card you are using.  
If you need to use an EDID setting not listed in the table, you will need to upgrade to a later version of  
DDC-CPU.  
EDID settings may be updated without notice. For the latest information, refer to the IBM technical  
support website for the T221 monitor.  
Even though a video graphics card is listed here, not all of its functions may not be supported.  
Table1: Supported setting number by DDC-CPU version 3.2 and 3.3  
Setting Applicable Description  
number model  
07  
08  
09  
10  
12  
13  
20  
27  
29  
-
-
-
-
-
-
Reserved. Do not use.  
Reserved. Do not use.  
Reserved. Do not use.  
Reserved. Do not use.  
Reserved. Do not use.  
Reserved. Do not use.  
DG1  
-
DG1/DG3  
For Matrox-G200MMSTM T221 version (Windows®)  
Reserved. Do not use.  
For ATI-FireGL4 TM, nVIDIA-Quadro4-900XGL TM (Windows®)  
(For the users who want 3840x2400 at 20Hz refresh rate. Recommended)  
Reserved. Do not use.  
30  
31  
-
-
Reserved. Do not use.  
Table2: Supported setting number by DDC-CPU version 3.4 and 3.5  
Setting Applicable Description  
number model  
07  
08  
09  
10  
12  
13  
20  
27  
29  
-
-
-
-
-
-
Reserved. Do not use.  
Reserved. Do not use.  
Reserved. Do not use.  
Reserved. Do not use.  
Reserved. Do not use.  
Reserved. Do not use.  
DG1  
-
DG1/DG3  
For Matrox-G200MMSTM T221 version (Windows®)  
Reserved. Do not use.  
For ATI-FireGL4 TM, nVIDIA-Quadro4-900XGL TM (Windows®)  
(For the users who want 3840x2400 at 20Hz refresh rate. Recommended)  
Reserved. Do not use.  
30  
31  
34  
-
-
Reserved. Do not use.  
DG1/DG3  
For nVIDIA-Quadro4-900XGL TM (Windows®)  
(Only for the users who want 3840x2400 at 24Hz refresh rate)  
For nVIDIA-Quadro4-900XGL TM (Windows®)  
(Only for the users who want 3840x2400 at 25Hz refresh rate)  
35  
DG1/DG3  
July 2002. Copyright International Display Technology 2002. All rights reserved.  
Page 4 of 4  
 

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