[PLUG] Recommended battery UPS?

[Russell Senior]

There is even a schematic findable online if you search for "apc
640-7732h rev 9". My transformer is T3 on page 8 of 10, one of its
purposes is to provide +5V for the microprocessor, afaict.

On Thu, May 20, 2021 at 7:32 PM Russell Senior
<russell at personaltelco.net> wrote:
>
> https://photos.app.goo.gl/wJrr27pUHsx1XpdQ8
>
> On Thu, May 20, 2021 at 7:30 PM Russell Senior
> <russell at personaltelco.net> wrote:
> >
> > On Tue, May 4, 2021 at 11:21 PM Tom <tgrom.automail at nuegia.net> wrote:
> > >
> > > In my experience, I've had the best luck buying broken rack mounted UPS
> > > units from data-centers and utility companies, ignoring all the high
> > > voltage/death/no-user-serviceable-parts-inside warnings, safely
> > > discharging the capacitors and fixing the units usually by soldering
> > > replacements for the broken parts in.
> >
> > I recently invented a new way to break a UPS, a circa 2002 APC
> > DLA1500, while replacing the batteries. The circuit board is mounted
> > above the batteries with components down. While pushing the new
> > batteries in to the cavity intended for them, the cabling (I think)
> > managed to shear a couple of the components partially off the board.
> > One is an easily replaced capacitor, but the second one is a custom
> > wound multi-tap transformer. If someone would like to bring it back to
> > life, either by rewinding the transformer or scavenging the part from
> > another broken APC UPS, they are welcome to try (let me know how you'd
> > like to receive the parts). I've chosen to solve my problem in a
> > different manner.
> >
> > --
> > Russell Senior
> > russell at personaltelco.net