Electronics > Beginners

Manson DPD-3030 PS - modifications possible?

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beanflying:
Fairly happy with the button look. No real chance of accidentally bumping them but still an easy flat fingertip press. Still need to finish the mounts and drill in a hole for the led (not using a surround now just a 3mm plain).

Break out the nibbler and lop about 10mm of the Pot support which is over built so a trim won't hurt. Then the PCB will sit about 1 or 2 washers worth in front of the plate with a couple of nuts and bolts to hold it.

Shock:
Made any more progress?

MarvinTheMartian:
Hi beanflying & Shock!

You're putting me to shame (and losing me a bit on switching the load on/off, but I'm only new - kits only to till now  :-//).

I've yet to even crack open the case on the Manson and look inside (thanks for the photos beanflying and for the diags/info Shock)  :-+.

I'll have to pull my finger out and get started on changing the pots to 5-turns. The rest might have to wait until I've more experience/knowledge.

I'm currently finally putting together the Altronics R-C decade box 'K7520' I bought years ago (too many other things going on or just too tired to get stuck in |O) and then push on to finishing the Energy Meter kit 'K4600' I bought years earlier than the decade box.  :palm:

Looking forward to seeing any progress you guys make on these mods.  :popcorn:

Cheers,

MarvinTheMartian

beanflying:
Hi Guys,

sorry other projects and earning a $$ have got in the way of any more progress. I do have a stash of 10 turn Pots to add to the voltage setting. Should get a chance to get back to it later this month once my silly season dies down.  8)

benryanau:
Dunno exactly what went on, but I blew both outputs within a few days working on SLA's.
It's sat in the corner for 5 odd years since, without the schematic I haven't been real keen to sort it myself.
The failure mode appears to be the output is dead-shorted - all looks well but just as if there's a fat jumper bridging +/- OP.
Think I had a look and saw maybe a heavy diode or such roughly jammed across the back of the +/- output's binding posts (internally).
One each. And if the supply is enabled with current limit is set max it's not long before there's a burning smell.. and I reckon it might have been the diode-like items.

Unusually disinterested and disheartened with the whole thing, thought I had a keeper on the bench.

But.. aside from my warnings about backfeeding or reverse polarity from sources, if there's some wisdom around that can offer any ideas?
Schematic would be nice :)

Cheers
ben

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