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SE and SE/30 psu's --- In the very near future, not good.


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ok so over the last couple years i did a few deals were people sent me parts in trade for a service etc...

 

so i have been taking in these se analog boards / psu's  thinking well i can use their parts of other things etc...

never really NEEDED a SE psu really before.

pretty much all the re-cap's i have been doing have been on already working SE/psu's

 

i guess i didn't realize once these things die they are gone.

and looks like they die for all kinds of other reasons even unrelated to caps.

 

the PSU died in my se/30 test machine today.  i didn't really think anything of it because i knew i had a stash of se/stuffs

i know i had like 5 psu's i got from one deal and then another 2 from another deal.

 

after the first 3-4, re-caps then try then nothing…..  i just started pulling and testing..

i went though every damm se/psu i had and none of them work… 

Gees i didn't really know thee guys were sending me dead crap… i mean i goes it to be expected as i fix this crap

but i am only one dude and would like to have something working of my own sometimes….  ?!  i guess the tis too much to ask for..

anyways..

 

like 7 SE psu's they are all dead… and i am kind of surprised because i have always been a big champion of SE's and how they are like 

most of the time always good…  even with out a re-cap… 

looks like i never came across the right junk… LOL

 

so anyways … looks like when you run these bad boys till they acutely die… they are dead.

even if you change the caps… i don't have time to sit here and diagnose these i as i need to get my ass busy doing 

other things lined up to do… but don't be like me… and run your SE/SE/30 psu till it dies thinking it will be fine

looks like not so much.

 

change those caps now. if you want the most luck as possible.

 

post-1852-0-56260700-1464671134_thumb.jpg

Edited by uniserver
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Were you testing these all with the same logic board? Maybe there's something wrong with the logic board that's causing problems for the PSU.

 

Or since all seven of your PSUs came from only two people, maybe they intentionally sent you dead PSUs from their own junk pile?

 

Either one seems more likely than seven randomly-selected PSUs all being bad.

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Yes artmix on ebay sells a retrofit psu, it has all new guts inside.

 

yeah i am sure they were all dead pull outs.

but they were ran till dead lol.

its ok … i just tore open my FDHD witch i knew worked… hurry up and re-capped the AB and PSU.

 

and now i am back up and running…     

 

howerve previously , one i turned on and it worked for about 35 seconds and i could see smoke coming from the psu

i happily tore that one apart looking for something burnt up.

i like smoke that usually means easy fix.

 

but i couldn't find anything that visibly looked cooked.

 

whats really got me steamed is the cheap asses here at my office have the thermostat adjusted …. its way to hot in here i will end up with a heat stroke in these conditions….  i am gonna really give it to them in the morning… because for the last week i keep telling them TOO HOT TOO HOT TOO HOT>>

she says ok…  but when ever i am here in the night (when i work) its like a PIT OF HELL the last week.

Edited by uniserver
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I hate working on power supplies and CRT monitors. While I keep a dead LC and MDD supply around to fix them, I would need to be desperate and bored to really dig into either of them anytime soon. Swapping a few caps isn't the issue, its figuring out which chips are toast, sourcing them, and getting to them. On the PC side I just junk anything that dies that is modernish and standard (I do have an AT desktop PS I need to look into).

 

And NO, I don't like working on anything when it is hot. If I start to sweat then I go do something else. One of the cool things about using the basement as a lab is it never gets too hot even if the AC isn't on.

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Fixing power supplies are easy as pie. Just have to know what to look for. The sony schematic is out there but I dont know about the Aztech version. I rebuilt 2 TAM supplies and got them running again. Chances are (when I can find time anymore) I can probably fix it. 

 

The hardest ones to fix are the ones that explode. the main switching FET goes, and usually takes everything else out with it. the driver transistor and/or IC. 

 

In the late 90s early 2000s when I was running an SE as a secondary computer for fun, I had an Aztech which did strange things. it would run and then suddenly pulsate, putting the computer into a reboot/chime loop. Then it was good again. it did that spontaneously and quite often. Turns out it was a very fine crack in the PCB on the transformer. Thats about the only time I can recall a failed SE supply. 

Edited by techknight
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whats really got me steamed is the cheap asses here at my office have the thermostat adjusted …. its way to hot in here i will end up with a heat stroke in these conditions….  i am gonna really give it to them in the morning… because for the last week i keep telling them TOO HOT TOO HOT TOO HOT>>

she says ok…  but when ever i am here in the night (when i work) its like a PIT OF HELL the last week.

 

oooohhhh... I got a fix for that. Grab you a portable unit, and run the exhaust tube right to their space. while the cool air blows on you. ;)

 

its usually the chicks. if there are women in control of the thermostat, your screwed. 

Edited by Bunsen
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yeah these pus's were packed full of filth,  and the caps has all leaked out the nasty goo all over the place.

seems like the 16v 470uf's are the first ones to spill their goo.

 

i think thinking these were from systems in a computer lab or something where they were on like 24/7.

 

I had a 840av psu catch fire and shoot out flames like 2 feet from the rear... the big pie fan turned it into a flame thrower... that was fun,  burned all the hair off my arm... that system came from a machine shop. lol

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yeah these pus's were packed full of filth,  and the caps has all leaked out the nasty goo all over the place.

seems like the 16v 470uf's are the first ones to spill their goo.

I do really hope you are mot mistaking the glue some manufacturers like to put around some components on the secondary side for actual cap leakage.

 

 

I'm sorry Uniserver but while a sample of seven PSU's is pretty large your word alone is not enough to justify the panic. I've never run into bad SE series PSU's. My friends have yet to run into them either and otherwise there's barely a handful of threads here on the forum where people had bad power supplies. I need more people showing their PSU's dropping like flies before I'll agree. Perhaps your storage conditions were exceptionally poor?

Edited by CelGen
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  • 68kMLA Supporter

I like it on the cold side.  I figure I can always bundle up if it gets too cold.  When it gets too hot, there're only so many layers of clothing you can take off before you get arrested in public.

Hyper-agree.

 

I will never get a tattoo, but if I did it would be just two simple words from the pickle jar:

 

"KEEP REFRIGERATED"

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  • 4 weeks later...

Don't worry it's own my new hobby list.

With new switching supplies I think it will be a quick turn around to produce a retrofit kit for the Se & se/30 power supply.

I'm thinking a pretty straight forward PSU replacement board.

Right off hand I ll probably use 7905 and 7912 1a VR for the -5 and -12

And lm317 with 2n3055 for the 12V and 5V outputs

I am thinking of how to make a transformer less  15A linear 28VAC regulated front end.

This way it could all be done on a single board at low cost.

I will keep you guys posted.

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Yea with a ton of wasted power and heat to boot! No way jose. A stable supply would be the size of china and double as a small space heater. No thanks. 

 

Keep it switching using DC-DC circuitry or buck/boost converters, you need efficiency and less heat. Also the capacitors would be monstrous because.... low frequency linear.... 

Edited by techknight
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  • 2 weeks later...

Yes of course the linears will throw some heat under load but my thought is to make a switcher 28V to feed them. No current no heat.

 

Switchers with linear regulation are actually pretty good and very small.

Mini-box.com sells a ATX device that is similar to what I am thinking of.

Of course it is a HF switcher but is feed by a 12V wall wart or car battery.

 

Besides teh heat sink of a sony powersupply that is in the originals is large enough for straight linear.

The big loads come in at start up and not much else.

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