Re: Power supply repair

[Michael J. Mahon <mjmahon@aol.com>]

Wayne Stewart <waynejstewart@gmail.com> wrote:
> I did that 7 or 8 years ago when I towerized a IIe. In this case it's
> a spare power supply I acquired with a couple of van loads of Apple II
> stuff. I ran the repaired power supply for 24 hours with no issues.
> 
> Strangely I was using a IIgs yesterday when I heard a pop and smoke
> was pouring out the vents in the power supply. The IIgs kept running
> but I shut it down as quickly as possible. Opened up the power supply
> and found a small bulging capacitor. Found a replacement from a junk
> board and soldered it in.

Yep, that's the line bypass type X2 capacitor. 

Some of them either just age or have absorbed enough AC line insults to
give up the ghost.  

The failure mode is to short, followed immediately by releasing the magic
smoke (which in the case of X2s is quite repulsive). 

They are readily available, and the value is non-critical. 

> I guess in the next decade or two a lot of people will likely have to
> consider either a Buggie power supply or rebuilding the original one.
> Lot of caps in the apple power supplies.

But all easily replaced when necessary...

> On Jul 4, 6:27 pm, "William Heckel" <spectrumlo...@verizon.com> wrote:
>> It's very easy to use a modern PC AT power supply to power your //e, I did
>> with no problem.
>> Simply cut the connector off your //e pwr supply leaving as much length as
>> possible, then simply match the cables from the //e connector to the same
>> voltage wires on the PC supply.   I believe they call this pwr supply a
>> "Bugge" ??


-- 
-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon