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Phihong PSM 4012-2 (Rev-A2) PSU

Repairs & upgrades.
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pixelpusher
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Joined: Fri Dec 27, 2019 9:01 pm

Phihong PSM 4012-2 (Rev-A2) PSU

Post by pixelpusher »

Hi folks,

I got my hands on a Mega ST psu I hadn't seen before: Phihong PSM 4012-2 (Rev-A2) PSU. Any idea how this performs (got no equipment to measure noise, regulation, etc.).?

I found a download link for the schematics here, but it seems to rather rare one (ain't mentioned in the last upgrade PSU thread either).
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exxos
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Re: Phihong PSM 4012-2 (Rev-A2) PSU

Post by exxos »

Never seen one, post a image ?
pixelpusher
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Re: Phihong PSM 4012-2 (Rev-A2) PSU

Post by pixelpusher »

Sure:
PSM 4012-2-RevA2.png
PSM 4012-2-RevA2.png (1.99 MiB) Viewed 3187 times
PSM _4012-2_top.jpg
PSM _4012-2_top.jpg (578.11 KiB) Viewed 3187 times
The machine was still sealed - so this was the factory state.
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Re: Phihong PSM 4012-2 (Rev-A2) PSU

Post by exxos »

I think I did see one of those years ago. One of the less common ones I assume.
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Re: Phihong PSM 4012-2 (Rev-A2) PSU

Post by pixelpusher »

exxos wrote: Mon Feb 03, 2020 12:25 pm I think I did see one of those years ago. One of the less common ones I assume.
Let me know if you're interested (and have time) to put it through your test bench - I could swap it ...
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