[time-nuts] hp 5372A Parts available

[J. L. Trantham]

Eric,

My 5372A fails Test 4, 'Input Amplifiers', with 'Input Bias Failure', 'Input
Bias Test 6: MAX: 2172 (Min: 2172) [2191 2235]', and Test 6, 'Count ICs',
with 'Count ICs Failed A3U37 and A3U42' and 'A3 U37, U42 chain FAILED --bad
count [4.1902 mS gate] : 0029517C [001FF7FC]'.

I am not sure what all that means but it would appear that the problem is on
the A5, A4, or A3 board.  Since Channel A is dead and Channel B works, A5
may be the culprit

I would like to hear what boards you have to offer.

Thanks,

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of J. L. Trantham
Sent: Sunday, March 20, 2011 8:34 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] hp 5372A Parts available

Eric,

I have a 5372A that has a problem on one of the input channels.  I
mistakenly unplugged the input pod and reinserted it with the power on.
Since then, that channel does not work.  I can't remember the specific
failed test right now but I will investigate.  The pod still works, the
problem stays with the channel.  I think I need to repair one of the boards.

Where are you located?

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Eric Haskell
Sent: Sunday, March 20, 2011 1:42 AM
To: time-nuts at febo.com
Subject: [time-nuts] hp 5372A Parts available

I just scrap out a 5372a.  The unit was working but reporting a histogram
error.  I am keeping a few parts, the rest is available.  Let me know if you
need anything.  

Eric Haskell


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