Re: Can dust inside an Apple IIgs catch fire?

[skylarking <petsoundsnz@gmail.com>]

On Friday, February 1, 2013 8:04:03 PM UTC+13, Michael J. Mahon wrote:
> osgeld <kevin@hackaday.com> wrote:
> 
> > its easy and you wont need to know what it actually does to replace it if
> 
> > that is what is going on (though from your description I would agree)
> 
> > 
> 
> > In a nutshell you need a equivalent replacement part (stats are on the
> 
> > side of the part) a soldering iron, and maybe a half day to tear things
> 
> > down, do a quality job and put it back together
> 
> > 
> 
> > if it is the input cap, heres what it does... you have AC power coming
> 
> > from your wall that sort of looks like
> 
> > 
> 
> > mmmmmmmmmm
> 
> > 
> 
> > it gets rectified to DC though a series of diodes to look like
> 
> > ~~~~~~~~~~
> 
> > 
> 
> > the cap smooths out those lumps so it looks like
> 
> > __________
> 
> > 
> 
> > 
> 
> > will it continue to work, eh maybe, it might cause weird glitches, it
> 
> > might cause other components to fail, it might just puke out and kill your system
> 
> > 
> 
> > a appropriate capacitor by the time you have it mailed is only a few
> 
> > bucks, a basic soldering iron is around 10, some solder may be 3-5 bucks more
> 
> > 
> 
> > so for some time, little effort and maybe 20 bucks you can fix a machine
> 
> > that would cost much more to replace
> 
> > 
> 
> > course to assure thats what needs to be done requires you to crack open
> 
> > the power supply. Before doing that I would unplug it, hit the power
> 
> > switch a few times and let it sit a few days, those high side caps can
> 
> > and will give you a jolt.
> 
> 
> 
> From the description of the problem, it could easily be the line noise
> 
> capacitor. It's connected directly across the AC line inside the power
> 
> supply box. 
> 
> 
> 
> The definitive diagnosis is that when it goes, there is a really strong
> 
> odor. 
> 
> 
There was definitely a strong smell that lingered for quite a while, so that could very well be it.