[time-nuts] pts 160 power problem
Bob Camp
lists at rtty.us
Fri Feb 25 18:10:32 UTC 2011
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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