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 <[email protected]> wrote: > > https://photos.app.goo.gl/wJrr27pUHsx1XpdQ8 > > On Thu, May 20, 2021 at 7:30 PM Russell Senior > <[email protected]> wrote: > > > > On Tue, May 4, 2021 at 11:21 PM Tom <[email protected]> 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 > > [email protected] _______________________________________________ PLUG: https://pdxlinux.org PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
