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Author Topic: Beware the reverse polarity PSU hazard...  (Read 50 times)

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elmo7sharp9

Beware the reverse polarity PSU hazard...
« on: May 09, 2017, 06:52:51 AM »

My ME-25 now operates only on battery power, following the accidental connection of a Yamaha PSU.
That fact that it's still working at all is a bonus...

Suspecting a blown protection diode, I tried bridging each diode near the power socket with a known-good diode. No luck... I've no idea what's wrong and I reserve SMD surgery for when I am certain of what I'm doing. If it ain't TOTALLY broke, don't attempt to fix it  ;) 

I will now bodge a second 2.1mm power socket in between the battery pack and the PCB. Crude, yes -  but I can't continue on batteries.
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