Re: Oh dear... Smoke + IIe = bad

[mjmahon@aol.com (Michael J. Mahon)]

AndyX replied:

>> Your's is a 0.1 mf bypass capacitor--not too hard to find.  Just
>> make sure that the voltage rating is adequate.  A more typical
>> failure mode for these is a short, accompanied by a blown fuse.
>> 
>> You've already done the hard part--opening the power supply.  ;-)
>> 
>> Good luck!
>> -michael
>> 
>> Check out amazing quality sound for 8-bit Apples on my
>> Home page:  http://members.aol.com/MJMahon/
>
>There's more to it, it seems. There's some melting of the plastic on the 
>very large ?transformer 3/4 to the left, and probably obscured in those 
>photos by the edge of the picture.

I did notice some minor overheating, but if the windings are secure
and the capacitor is truly the source of the heat, then I think the
transformer will be fine.  (Of course, if the transformer overheated itself,
then that's a harder problem.  ;-)

You did say that the //e continued to function even as this heating
occurred, correct?  That argues convincingly for a partially shorted
bypass capacitor, and not a faulty switching transistor or transformer.

>I am already looking into sourcing a replacement power supply.  It's too 
>soon for my IIe to bite the dust I think.

Also a good option.

-michael

Check out amazing quality sound for 8-bit Apples on my
Home page:  http://members.aol.com/MJMahon/