Power Supply

Muthahar786 4 months 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 4 months ago +3

Thank you all for the responses. With fuse change, the power supply is now working.
md_steve 4 months ago +1

Please give us the model number.
aswinvenu 4 months ago +1

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

0 md_steve 4 months ago

Please give us the model number.
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0 aswinvenu 4 months ago

Did you see magic smoke? If not check the fuse!
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0 kmikemoo 4 months 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 4 months 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 4 months 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 4 months ago

TENMA_72-13350

Model no
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0 aswinvenu 4 months ago in reply to Muthahar786

Did you check the fuse?
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0 kmikemoo 4 months 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 4 months ago

Thank you all for the responses. With fuse change, the power supply is now working.
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0 dang74 4 months ago in reply to acdc90

I'm crossing my fingers too.
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