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Indeed. We must actually be cleverer than we think - or more stupid in breaking it in the first place :-?!
Unfortunately there is no other way into our garage apart from the car door - but the replaced UPS is working fine. I by-passed the piezo-electric beeper thingy which had blown by...
Hi Brad
Well I de-soldered MOV2 and found that it actually has high resistance when out of circuit so I soldered it back in again.
However the good news is that the unit is actually working now but it doesn't sound the buzzer when working offline - that was what was making the clicking noise...
Brad
Those suggestions are very helpful. I found F3 at last and, as you suggested, it didn't look like a fuse at all being in a stubby little cylindrical package adjacent to the small transformer. However it does not appear to be blown as it reads 1.9 ohms both ways.
There are also a couple of...
There is no display. No beeps, only a faint click from an unidentified component somewhere as it is powered up on battery.
I need to get a circuit diagram for the board. I have found one for a slightly different, probably earlier model but still looking...
I'm pretty sure it doesn't need a load attached. Normally you can hear the transformer buzzing loudly on these when they are operating on battery (I have used APC for years), and, as I said, it was operating on battery before I started the project just beeping to alert me that it was not...
Thanks for getting back to me.
It worked even without the mains cord plugged in, beeping to let you know that the power was off. It doesn't do that now and you can't even hear it kicking in.
Yes, it worked as a standalone unit.
Yes, it has a relay in the circuit. I can energize that with 12v...
Hi
I noticed some other posts on here about APC UPS and it seems that some posters have good knowledge of this kit.
I was extending my (working) UPS to use a larger external 12v battery with long cables and had put it back together again with the battery in. I had turned it upside down to...
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