1. David's Tech on April 26, 2021 at 12:40 am

    I’ve always seen these in Jaycar stores and wondered about the build quality. Thanks for taking the time to undo the covers and show us the insides.

  2. Exeutech Tutorials on April 26, 2021 at 12:50 am

    My mp5207 ups failed and had most of the fets burnt out. Also had the batteries below 5v. I replaced the fets and batteries. The fuse blows when plugged in. When I go to plug my new batteries in the fets spark and smoke so it may be the inverter circuit shorting out.

  3. OldFox on April 26, 2021 at 1:12 am

    G’day, I just found your vid after inspecting one of these at a customer’s site. It was dead, although the fuse was intact. I did pull the lid off so see if I could see any obvious issues (I’m no sparky) and two of FETs where blown (Q2 & Q8). Any ideas on that implies?

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