Hello Jeremy,
The 12VDC cable kit has the part number E4401-60066. Sometimes they
appear for sale on eBay. I don't know the polarity of the pins but you
can check with a multimeter which pin is the Ground pin and the other
one will be the +12VDC. Maybe the Ground pin is not the same as the
chassis ground but you can try, otherwise you will need to open the case
and check the PSU PCB to see which one is the Ground.
The Snaphat battery will not create such issues that you experience with
your SA.
As for schematics they are available at Artek but the PSU is not
included in that CLIP.
Regards,
Razvan
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On 22/03/2025 18:46, Jeremy Owen via groups.io wrote:
I have an E4402B spectrum analyser with an odd power fault.? The SA
powers down after about 10 minutes, but works fine up until then.
(It has been working well in the past but has been unused for a year or two.
I want to try powering it from 12V DC to see if that makes any difference.
Does anyone know the polarity of the two-pin connector on the rear?
And I assume that no-one has rea;l schematics for this unit.? I can't
find them anywhere.
The service manual has just block-level detail.
And could a failing Snaphat battery on the CPU board have any effect on
powering up and down?? It's 7 years old according to the sticker.
any help gratefully received!
-Jeremy
