At 08:32 AM 3/8/2002 +1100, Dr A.P. Whichello wrote: >At 05:53 PM 6/03/2002 +0000, jstadius wrote:
> >Has any one experienced partial short circuits apearing between
> >adjacent pins on ADSP21061,2 devices. These shorts are around a few
> >tens of ohms. On removing the faulty device from the pcb the fault
> >disapears-probably due to heating the device
> >
>
>Not exactly, but I have a 21061 board that, after I've downloaded a
>program, locks up (will not work) UNTIL I WAVE MY HAND OVER IT!! While
this
>is very gratifying, and confirms all those things my parents said about
>their TV's with faults working perfectly when I watched them, it is a
bit
>weird. Obviously there is some strange capacitance thing going on.
>
>Adrian.
>--
>Dr A.P. Whichello Phone: +61 2 6201 2431
>Electronics & Telecommunications Engineering Fax: +61 2 6201 5041
>University of Canberra Email:
>Australia WWW: http://www.ee.usyd.edu.au/~adrianw
This sounds like you might have an open connection where a pullup is
connected. You might try pushing gently on the pins of the DSP with a fine
tipped probe
Reply by Dr A.P. Whichello●March 7, 20022002-03-07
At 05:53 PM 6/03/2002 +0000, jstadius wrote: >Has any one experienced partial short circuits
apearing between
>adjacent pins on ADSP21061,2 devices. These shorts are around a few
>tens of ohms. On removing the faulty device from the pcb the fault
>disapears-probably due to heating the device
>
Not exactly, but I have a 21061 board that, after I've downloaded a
program, locks up (will not work) UNTIL I WAVE MY HAND OVER IT!! While this
is very gratifying, and confirms all those things my parents said about
their TV's with faults working perfectly when I watched them, it is a
bit
weird. Obviously there is some strange capacitance thing going on.
Adrian.
--
Dr A.P. Whichello Phone: +61 2 6201 2431
Electronics & Telecommunications Engineering Fax: +61 2 6201 5041
University of Canberra Email:
Australia WWW: http://www.ee.usyd.edu.au/~adrianw
"I wish to God these calculations had been executed by Steam!"
C.Babbage
Reply by jstadius●March 6, 20022002-03-06
Has any one experienced partial short circuits apearing between
adjacent pins on ADSP21061,2 devices. These shorts are around a few
tens of ohms. On removing the faulty device from the pcb the fault
disapears-probably due to heating the device