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tech / sci.electronics.repair / Re: Stanford SR770 FFT analyzer forgets its settings...

SubjectAuthor
* Stanford SR770 FFT analyzer forgets its settings...Jean-Pierre Coulon
`* Stanford SR770 FFT analyzer forgets its settings...Peter W.
 `* Stanford SR770 FFT analyzer forgets its settings...JC
  `- Stanford SR770 FFT analyzer forgets its settings...Jean-Pierre Coulon

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Stanford SR770 FFT analyzer forgets its settings...

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Newsgroups: sci.electronics.repair
Date: Wed, 1 Nov 2023 08:37:18 +0100
From: coulon@cacas.pam.oca.eu (Jean-Pierre Coulon)
Subject: Stanford SR770 FFT analyzer forgets its settings...
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 by: Jean-Pierre Coulon - Wed, 1 Nov 2023 07:37 UTC

when I switch it off. I guess it has a rechargeable battery somewhere but
where is it? I don't see it when I lift the upper cover.

--
Jean-Pierre Coulon

Re: Stanford SR770 FFT analyzer forgets its settings...

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Subject: Re: Stanford SR770 FFT analyzer forgets its settings...
From: peterwieck33@gmail.com (Peter W.)
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 by: Peter W. - Wed, 1 Nov 2023 10:21 UTC

On Wednesday, November 1, 2023 at 3:37:46 AM UTC-4, Jean-Pierre Coulon wrote:
> when I switch it off. I guess it has a rechargeable battery somewhere but
> where is it? I don't see it when I lift the upper cover.
>
> --
> Jean-Pierre Coulon
Or, a super-cap. Something like this: https://mm.digikey.com/Volume0/opasdata/d220001/medias/images/928/MFG_FG0V155ZF.jpg

Peter Wieck
Melrose Park, PA

Re: Stanford SR770 FFT analyzer forgets its settings...

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Subject: Re: Stanford SR770 FFT analyzer forgets its settings...
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 by: JC - Wed, 1 Nov 2023 14:13 UTC

Peter W. wrote:
> On Wednesday, November 1, 2023 at 3:37:46 AM UTC-4, Jean-Pierre Coulon wrote:
>> when I switch it off. I guess it has a rechargeable battery somewhere but
>> where is it? I don't see it when I lift the upper cover.
>>
>> --
>> Jean-Pierre Coulon
> Or, a super-cap. Something like this: https://mm.digikey.com/Volume0/opasdata/d220001/medias/images/928/MFG_FG0V155ZF.jpg
>
> Peter Wieck
> Melrose Park, PA
>

The schematics are available
https://www.thinksrs.com/downloads/pdfs/manuals/SR770m.pdf

The battery is a BR2/3 2 pin soldered in (page 270 schematic top of page)

They are fairly obvious usually, seems to be on the cpu board, bottom
board left side under the psu board
JC

Re: Stanford SR770 FFT analyzer forgets its settings...

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Newsgroups: sci.electronics.repair
Date: Thu, 2 Nov 2023 08:22:27 +0100
From: coulon@cacas.pam.oca.eu (Jean-Pierre Coulon)
Subject: Re: Stanford SR770 FFT analyzer forgets its settings...
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 by: Jean-Pierre Coulon - Thu, 2 Nov 2023 07:22 UTC

Thanks. I found a Panasononic BR 2/3 A battery on the bottom board after I
unscrewd the top board on the left.

--
Jean-Pierre Coulon

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