Hello Mike Dunn, Shekhar and Other experts,

Thanks for the valuable information. You are right that the problem is caused because I was not storing the DSK in the antistatic bag. Now we have decided to desolder the 3.3V regulator area completely and then resolder new components. I shall let you know whether this solved the problem.

Thanks,

Ramanan.

----- Original Message -----

From: Mike Dunn

To: Ramanan ; c...@yahoogroups.com

Sent: Sunday, November 07, 2004 9:34 PM

Subject: Re: [c6x] C6711 DSK not working

Hello Ramanan,

Thank you for doing an excellent job of analyzing your problem. It looks like you are correct and might have a problem in your 3.3v power supply.

If my memory is correct, it seems like the 6711 DSK draws about 750 ma during normal operation. My *guess* is the the "switcher isn't switching in your regulator" [ie something in your regulator circuit, as shown on sheet 18 of the schematics, is blown].

I have seen a few different problems occur from not stroing the board in the antistatic bag. Tossing it in a box or drawer with a bunch of "paper stuff" can cause problems from ESD.

With careful analysis [and possibly a reference board] and a scope you may be able to isolate the component.

mikedunn

Ramanan <r...@solitonautomation.com> wrote:

Dear Experts,

I have a C6711 DSK board which I used before an Year (It was working properly by that time). When I tried to use that board now, it refuses to start up. The start up routine is not running and the board is not detected when I open the code composer.

Its taking 350 mA of current when I gave a supply of 5V - Do the normal boards take this much current?
1.6 V is measured in multimeter when i probed it at 3.3V test points. - What might be causing this? The regulator has blown or any other part is loading?
5V and 1.8V points measures correctly.
When I press the reset push button, reset_active LED is not glowing.

Your help in this regard will be highly appreciated.

Thanks,

Ramanan.

_____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: Send an email to c...@yahoogroups.com To Post: Send an email to c...@yahoogroups.com To Leave: Send an email to c...@yahoogroups.com Archives: http://www.yahoogroups.com/group/c6x Other Groups: http://www.dsprelated.com

Hello Ramanan,

Thank you for doing an excellent job of analyzing your problem. It looks like you are correct and might have a problem in your 3.3v power supply.

If my memory is correct, it seems like the 6711 DSK draws about 750 ma during normal operation. My *guess* is the the "switcher isn't switching in your regulator" [ie something in your regulator circuit, as shown on sheet 18 of the schematics, is blown].

I have seen a few different problems occur from not stroing the board in the antistatic bag. Tossing it in a box or drawer with a bunch of "paper stuff" can cause problems from ESD.

With careful analysis [and possibly a reference board] and a scope you may be able to isolate the component.

mikedunn

Ramanan <r...@solitonautomation.com> wrote:

Dear Experts,

I have a C6711 DSK board which I used before an Year (It was working properly by that time). When I tried to use that board now, it refuses to start up. The start up routine is not running and the board is not detected when I open the code composer.

Its taking 350 mA of current when I gave a supply of 5V - Do the normal boards take this much current?

1.6 V is measured in multimeter when i probed it at 3.3V test points. - What might be causing this? The regulator has blown or any other part is loading?

5V and 1.8V points measures correctly.

When I press the reset push button, reset_active LED is not glowing.

Your help in this regard will be highly appreciated.

Thanks,

Ramanan.

_____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: Send an email to c...@yahoogroups.com To Post: Send an email to c...@yahoogroups.com To Leave: Send an email to c...@yahoogroups.com Archives: http://www.yahoogroups.com/group/c6x Other Groups: http://www.dsprelated.com

Dear Experts,

I have a C6711 DSK board which I used before an Year (It was working properly by that time). When I tried to use that board now, it refuses to start up. The start up routine is not running and the board is not detected when I open the code composer.

Its taking 350 mA of current when I gave a supply of 5V - Do the normal boards take this much current?
1.6 V is measured in multimeter when i probed it at 3.3V test points. - What might be causing this? The regulator has blown or any other part is loading?
5V and 1.8V points measures correctly.
When I press the reset push button, reset_active LED is not glowing.

Your help in this regard will be highly appreciated.

Thanks,

Ramanan.