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DSP508 half voltage output fix

Posted: 16 Mar 2021 18:12
by exxos
I've had a couple of the DSP508 which are only outputting half voltage (under load) ..

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It was found in both cases a bad joint on the heatsink, which is being used as part of the mains circuit it seems :roll:

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Re-soldered..

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Done! The voltage is showing higher than it should as they battery is going in my meter, but it's actually 5.02V!

Re: DSP508 half voltage output fix

Posted: 16 Mar 2021 19:46
by exxos
The very similar ASP34 suffers from bad joints on the heatsink as well...

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Re: DSP508 half voltage output fix

Posted: 17 Mar 2021 01:13
by kodak80
Thank you @exxos I had a PSU here that was outputting half-voltages under load. This made me check the heatsink pin soldering and I found a crack so re-soldered all heatsink pins and viola the PSU is working again and outputs normal voltages again. :cheer:

PSU solder crack - half voltage under load is the result (kodak80).jpg