[Test-Equipment] Help with HP 70000 Spectrum Analyzer

[Chris Hackworth]

I checked the voltage selector, it is set for 115 Vac. Unit is also a 60Hz unit.

Chris N8PHU

On Fri, May 23, 2008 at 3:50 AM, James M. Walker <chejmw at buffalo.edu> wrote:
> Hey Greg did you get a copy of the service manual?
> If NOT I can email you the thing.
>
> Some of the problems stated in the manual, are the unit ac input selector
> is set at a different value than you are using, Ie; unit set for 230 VAC
> with 115 VAC
> applied, or the reverse! Also if the unit is a 400 HZ as opposed to 60 HZ
> model.
> You may get fault indications.
>
> Input, need more input!
>
> Jim
> WB2FCN
>
> ----- Original Message ----- From: "Greg Werstiuk" <greg_werstiuk at msn.com>
> To: "'Discussion of Electronic Test Equipment'"
> <test-equipment at mailman.qth.net>
> Sent: Friday, May 23, 2008 2:45 AM
> Subject: RE: [Test-Equipment] Help with HP 70000 Spectrum Analyzer
>
>
>> Would it be correct for those of reading your post to assume you have
>> removed all of the plug-ins and the over current condition still exists at
>> this point?
>>
>> -
>> Greg
>>
>>> -----Original Message-----
>>> From: test-equipment-bounces at mailman.qth.net
>>> [mailto:test-equipment-bounces at mailman.qth.net] On Behalf Of
>>> Chris Hackworth
>>> Sent: Thursday, May 22, 2008 8:27 AM
>>> To: Test-Equipment at mailman.qth.net
>>> Subject: [Test-Equipment] Help with HP 70000 Spectrum Analyzer
>>>
>>> Greetings all,
>>>
>>>  I have come into the possession of a HP 70000 Spectrum
>>> Analyzer, consisting of the 70004A display, 70902A IF module,
>>> 70900B Controller,  a 70001A mainframe with the 70310A
>>> Precision Oscillator, 70600A preselector, all connecting
>>> cables, manuals and 70905B Rf section (50Khz to 22 Ghz). I
>>> got it for the princely sum of nothing, just haul it off the
>>> company property because it was broken. The power supply in
>>> the 70001A mainframe is showing an over current fault. I
>>> checked the trip level of this alarm and it is set correctly.
>>> Anyone else have a problem like this? Nothing on the power
>>> supply card looks burnt or overheated, so I am thinking there
>>> is a bad semiconductor somewhere on the board. The HP manual
>>> reccomends replacing the power supply, but there is no way
>>> that is going to happen.
>>>
>>> Thanks,
>>> Chris N8PHU
>>> ET1(SW) USN (Ret)
>>> Chief transmitter Heavy SES-Americom
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>>>
>>
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>>
>>
>
>
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-- 
Chris N8PHU
ET1(SW) USN (Ret)
Chief transmitter Heavy SES-Americom