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Re: Apple ///: burned Power Supply



Polymorph wrote:
On Jan 25, 12:17 am, Jerome Vernet <vernet.jeromePASDES...@wanadoo.fr>
wrote:

Hi,

Today, I powered on my two Apple ///, essentialy to take pictures of
them, to sell one on eBay (the older one, very first version on Apple ///)..

Both of them boot, then, sudenly, the power supply of the oldest made a
crack noise, with a big smoke :(.

It still work some second making cracks and smoke, before I shut down
the power on the wall.

Here is a picture of the smoked componant:

http://membres.lycos.fr/jvernet/Apple3PS/Apple3PS.html

See on the page the video: I was testing it with a testing software that
 was speaking "Machine OK". Then, it blew up ;)

What can I do ?

--
-----
Jerome Vernet
Petite Collection de vieux microshttp://perso.orange.fr/jerome.vernet/


Exactly the same mains filter capacitor (or *very* similar) burnt out
in two of my //e power supplies. It seems this is pretty common when
the power supply has not seen any use for a long period of time.

It is fairly easy to find replacement capacitors and do the
replacement. I replaced the failed capacitor in both of my //e power
supplies and both are now working fine.

BTW, doesn't the smoke smell bad?!?  I couldn't get the whiff out of
the house for over a week.  :-)

Although it's certainly not the case here, this used to be one of the
uses of PCBs!

-michael

NadaPong: Network game demo for Apple II computers!
Home page:  http://members.aol.com/MJMahon/

"The wastebasket is our most important design
tool--and it's seriously underused."