[hpsdr] Ozy Failure

[John Melton]

Looks like D14 has been hit.  If I jumper across it and connect to USB
then D12 is being lit so the +5v is getting through, but no sign of the
device on the USB bus so it looks like there are problems elsewhere.

-- John

On Fri, 2010-07-23 at 16:58 +0100, John Melton wrote:
> Interesting - I do not see D12 lit.  I can see the 5v on the USB
> connector, but not at J32, so it looks like D14 may be the problem.
> 
> -- John
> 
> On Fri, 2010-07-23 at 11:49 -0400, K1rqg at aol.com wrote:
> > John
> >  
> > BTW, D-12 does light when powered from USB bus
> >  
> > Joe
> >  
> > In a message dated 7/23/2010 11:17:34 A.M. Eastern Daylight Time,
> > john.d.melton at googlemail.com writes:
> >         Yes, I have changed the USB cable but that did not help.
> >         
> >         -- John
> >         
> >         On Fri, 2010-07-23 at 11:09 -0400, K1rqg at aol.com wrote:
> >         > John
> >         >  
> >         > I had a problem a long time ago, and could not remember all
> >         the
> >         > symptoms. But
> >         > U-14 would shut down and now that I remember, D12 would go
> >         out. One
> >         > other thing, 
> >         > have you replaced your USB cable?? 
> >         >  
> >         > Joe
> >         >  
> >         > In a message dated 7/23/2010 10:51:08 A.M. Eastern Daylight
> >         Time,
> >         > john.d.melton at googlemail.com writes:
> >         >         Hi Joe,
> >         >         
> >         >         U14 is putting out 3.3v and also U10 is puuting out
> >         1.2v so
> >         >         all the
> >         >         voltages look to be OK.
> >         >         
> >         >         -- John
> >         >         
> >         >         On Fri, 2010-07-23 at 10:42 -0400, K1rqg at aol.com
> >         wrote:
> >         >         > John
> >         >         >  
> >         >         > Check U-14 for proper operation.
> >         >         >  
> >         >         > 73 de Joe
> >         >         > K1RQG
> >         >         >  
> >         >         > In a message dated 7/23/2010 10:32:22 A.M. Eastern
> >         Daylight
> >         >         Time,
> >         >         > john.d.melton at googlemail.com writes:
> >         >         >         ***** High Performance Software Defined
> >         Radio
> >         >         Discussion List
> >         >         >         *****
> >         >         >         
> >         >         >         
> >         >         >         My Ozy board seems to have failed.  I only
> >         have the
> >         >         D12 led on
> >         >         >         and my
> >         >         >         computer does not see the USB device any
> >         more.  It
> >         >         is  TAPR
> >         >         >         built Rev B
> >         >         >         board.
> >         >         >         
> >         >         >         I have checked voltages on my LPU and on
> >         the Atlas
> >         >         bus and
> >         >         >         they all look
> >         >         >         OK.  I have also tried plugging in an ATX
> >         power
> >         >         supply with
> >         >         >         the same
> >         >         >         results.
> >         >         >         
> >         >         >         Any ideas on where to start looking?
> >         >         >         
> >         >         >         Regards,
> >         >         >         
> >         >         >         John g0orx/n6lyt
> >         >         >         
> >         >         >
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> >         
> 



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