[time-nuts] pts 160 power problem

[Bob Camp]

Hi

What ever it is, it's getting *HOT* while it does it. You should just about be able to see smoke off of it. A touch test (with the possibility of a burn) is the fast way to track this down.

Bob


On Feb 25, 2011, at 12:58 PM, paul swed wrote:

> Thats my suggestion also you have a cap someplace giving you trouble.
> 
> On Fri, Feb 25, 2011 at 12:15 PM, J. Forster <jfor at quik.com> wrote:
> 
>> Look for a shorted Tantalum decoupling capacitor on the DC power line(s).
>> 
>> -John
>> 
>> =============
>> 
>> 
>>> hi
>>> 
>>> i recently bought a pts160.  when first turned on, the 5v was pulled
>> quite
>>> low: < 3v.  after an hour or so, the condition cured, the 5v = 5.1v and
>>> the
>>> output matched the decades.
>>> then, it died again.  so i know there is a unit worth saving.
>>> 
>>> i tried another more robust 5v supply, but that goes to 4.5v and ng
>>> output.
>>> 
>>> i removed each of the plug-in decades, one at a time, looking for the
>>> guilty
>>> one.  no joy.  i also removed the left rear module (uses 5v).  the other
>>> two
>>> modules only use 12v. which is fine.
>>> 
>>> has anyone been here before?  could it be a problem in the backplane (a
>>> work
>>> of art, btw)?
>>> 
>>> many thanks...
>>> 
>>> dave
>>> --
>>> Dave Mallery, K5EN                 (ubuntu linux 10.10)
>>> HC31 Box 99E;                   Williamsburg,  NM  87942
>>> 
>>> no gates...
>>>  no windows!
>>>    free at last!
>>>      linux counter #64628 (since 1997)
>>> 
>>> "People aren't as dumb as Microsoft needs them to be."
>>> --PJ, May 2007
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>>> 
>> 
>> 
>> 
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