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mjnurney
25th June 2012, 13:52
another day and another psu dies...

This one is from my A3000 that i was (am) cleaning up to probably sell soon and as such it was playing to its self very happily. then i turned it off and an a few mins back on again with a floppy disk in.

and BANG! and a whiff of smoke from the PSU.

so I've stripped the PSU now and its looking very old inside. what looks like the Toroidal Transformer has started to break open , i tested the psu by staring well clear and applying power with a volt meter on it and a crack of electric leaped from the yellow seal. a very pretty bolt of electric that never fails to impress...although probably not a selling feature from new.

well knackered me thinks.

no part numbers come up but I'm not too bothered as an ATX conversion is much safer than a 20 year old PSU.

mike.

Zetr0
25th June 2012, 13:55
thats sad to read my friend,

I am also quite surprised the winding failed - but I suppose its only a matter of time =(

mjnurney
25th June 2012, 13:57
they don't last forever i guess but a modern mini psu is a simple enough job to do.

salaxi54
25th June 2012, 13:58
Welcome to the club Mike!
http://www.amibay.com/showthread.php?t=17790&page=9
I'd be curious to know if you had other parts of the pcb roasted except the transformer...

mjnurney
25th June 2012, 14:04
looks good. i need to find a mini PSU and convert the wires to suit the A3000 pin out.

in the past i usually cut the ATX and Amiga mobo leads and match them up , the 3000 is a little more trick as the psu is tiny by ATX standards...

i know people have found drop in replacements...goes off searching.

salaxi54
25th June 2012, 14:11
Mike, extra hints, from the same thread:
http://www.amibay.com/showthread.php?t=17790&page=6
By the way, you're lucky you got a metal casing for it ready! I built my own to look like the original a bit... :thumbsup:

mjnurney
25th June 2012, 14:14
I've found a psu that is more powerful and smaller (size) so all good, i may pester you for the pin out of the 3000 later :-)

how come you made a case? was the one you have loaned to you?

mike.

salaxi54
25th June 2012, 14:16
Yup, it wasn't mine, but came in handy for measurements! :)
Bad thing the exploding original one was the one i borrowed... :picard

mjnurney
25th June 2012, 14:18
ahh that explains it :-)

if i was keen i could strip the psu and change various parts but its 20 years old and id much rather have a modern one than hopefully won't try to kill me when power is applied.

between monitors and PSU's trying to get me I'm supplied I'm still here :-) (that should surprised - a note to OSX devs , your spell checker is too damn quick! )

salaxi54
25th June 2012, 14:21
between monitors and PSU's trying to get me I'm supplied I'm still here :-)

It is my understanding that you actually had a typo there... guess you meant 'surprised'? ;)

mjnurney
25th June 2012, 14:22
damn spell checkers ! I'm sure they are all out the me !! lol

cosmicfrog
25th June 2012, 15:20
\o/ more magic smoke

we want video next time for that being there feeling ;)

mjnurney
25th June 2012, 15:33
I'll see what I can do :-)

mjnurney
29th June 2012, 16:58
new PSU arrived today and I've quickly done a test fit and i have to say it could not of fitted better if i had planned it :-)

new PSU size -

MAKE ; DELTA MODEL DPS - 175 HB

CONNECTORS

1 X 20PIN ATX MOTHERBOARD CONNECTOR

1 X 4PIN MOTHERBOARD CONNECTOR

3X 4PIN POWER CONNECTORS

1 X 4PIN FLOPPY POWER CONNECTOR

POWER INPUT 200/240V 50/60Hz

OUTPUT 175 WATTS

125 (W) X 63.5 (H) X 100 (L)mm