Quote:
Originally Posted by budm
Is this UPS a true sine wave inverter or step sine wave type? Do you have full model number?
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UPS is a true sine wave inverter; model number being SUA1000VA. I never use step sine wave types :-)
The noise seems to be from the EPCOS cap, but also could be from the chicklet brown cap to its left:
http://i.stack.imgur.com/6v3u5.png