[Test-Equipment] Help with HP 70000 Spectrum Analyzer

[Chris Hackworth]

Almost forgot,  I did get a copy of the service manual, it gives a
block diagram of the supply, but not a schematic (darn!).


On Sat, May 24, 2008 at 12:25 AM, Chris Hackworth <n8phucjh at gmail.com> wrote:
> 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
>



-- 
Chris N8PHU
ET1(SW) USN (Ret)
Chief transmitter Heavy SES-Americom