UPS repair - Looking for schematics and suggestions

[AndersJ]

The UPS will not start when the front panel button is pressed,
The backligt turns on while button is pressed.
The batteries are good.

It has no model number or manufacurer id.

Does anyone have:
* A schematic digaram
* Any ideas?

Sorry about the image size and rotation, I cannot figure out how to fix it.

[SoundTech-LG]

Lawyers are hard at work to prevent schematics being released. DIY repairs are a big part of the reason.

[geggi1]

How did the front crack?
If it was dropped I would look for cracked solders and PCB.
A quick google for Elrond i found a swedish page. From this I would assume that because of the only hit in google its probably a OEM product out of China.
Sytart googling for combinations of kVA, Ah, battery size and so on. Google for pictures and you might find a UPS that looks similar.

[AndersJ]

Good thinking about the cracks, and picture googling.
I had not thought that far…
Thanks.

[nexus]

There must be a model # somewhere on the chassis or PCBs. Not like it would help, because this "ELROND" company is quite obscure online.

Their full name is "elrond komponent AB". Apparently they have a linkedin page: https://www.linkedin.com/company/elrond

Official website: https://elrond.se/produkter/typ/ups-1-och-3-fas/1-fas-ups/

This product is probably obsolete. If you want to do component level repair, you need to carefully take it apart and start doing diagnostics at a board level. Checking power rails, inspecting for visual signs of damage. If you are not familiar with this process then this might not be a good first project, because hazardous voltages can exist inside of a device such as a UPS.

[james_s]

If you can't even find a model number good luck finding a schematic, it's hard to find schematics for even the name brand stuff although I have seen a few UPS schematics floating around. Is there something special about this specific unit? Decent quality UPS's can often be found very cheaply, needing only a new battery. It isn't worth spending much effort repairing one unless it's something fancy like a true-sine model.

[fzabkar]

This company appears to manufacture Elrond's current UPS range:

http://www.riello-ups.com