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Posted: 2025-05-22 12:39 PM . Last Modified: 2025-05-26 05:45 AM
Hi everyone,
I had an old (but seems still great, despite some light buzz-noise from the inverter... is that okay?) BK650EI model APC UPS.
I need to replace some components, in details some ceramic capacitor of the tiny network surge protection board (two yellow and one blue)... i can't read the ID on them unfortunately.
Anyone have some suggestions? The UPS seems works also without grounding it (plugged into the mainboard), but I wanna to fix that even I know this is an old model.
I can't find any electric schematic about this model 😞
Many thanks for the support to anyone that can help me!
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