Power Supply

Muthahar786 over 1 year ago

The Tenma power supply turned off when I switched from 230V to 115V with 230V connected.

it is not getting ON. Not sure if fuse has failed.

Any idea how to make it ON?

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Muthahar786 over 1 year ago +3

Thank you all for the responses. With fuse change, the power supply is now working.
md_steve over 1 year ago +1

Please give us the model number.
aswinvenu over 1 year ago +1

Did you see magic smoke? If not check the fuse!

0 md_steve over 1 year ago

Please give us the model number.
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0 aswinvenu over 1 year ago

Did you see magic smoke? If not check the fuse!
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0 kmikemoo over 1 year ago

Another component to check is the slide switch itself. Deenergized, of course. The physical construction of those switches isn't robust when it comes to dealing with arcing switching. The good news is that they are readily available (in many cases) and are not hard to replace. Good luck.
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0 dang74 over 1 year ago

I am not familiar with this specific power supply but I think setting the switch to 115V while it's still connected to 230V would expose its internal power conversion circuitry to twice the voltage it's designed for.... hopefully it isn't damaged and it's a simple matter of changing a fuse.
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0 acdc90 over 1 year ago in reply to dang74

i expect this has a switch mode supply then if it designed properly it would have some Gmov (varister)

if your lucky 2 of those and a fuse and your away.

a lot of time i disable that switch
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0 Muthahar786 over 1 year ago

TENMA_72-13350

Model no
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0 aswinvenu over 1 year ago in reply to Muthahar786

Did you check the fuse?
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0 kmikemoo over 1 year ago

Muthahar786 While not exactly your power supply, this post from two years ago may also help you. Tenma Power Supply Firmware & Schematics (72-13300, 72-13310, 72-13320, 72-13330)
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0 Muthahar786 over 1 year ago

Thank you all for the responses. With fuse change, the power supply is now working.
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0 dang74 over 1 year ago in reply to acdc90

I'm crossing my fingers too.
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