Re: Fixing the Apple IIc "Brick" (a.k.a. power supply)

[ralphp@gcstation.net (Ralph Wade Phillips)]

Hi, Tom!

In article <jp81292@pro-nsdapple.cts.com>, tomk@pro-nsdapple.cts.com (Tom
Kelly) wrote:

> The "brick" (power supply) for my Apple IIc died today.
> I plan to take it apart and fix the supply.
> Before I cut the case apart, I thought I'd check here for some tips
> on getting it apart and repairing the supply.
>  
> The output is now 0 VDC.  The primary of the transformer is OK.
> I learned this by holding a magnet close to the brick when it is pluged in.
> I could feel the magnet vibrate..
>  
> I have the following questions:
>  
> 1) What is the best (and easiest) way to open the brick?
> 2) Any tips on the common causes of "brick" failure and how to fix them?

        The easiest way I had, back in the //c days, was to use a hot
knife to cut it open.  You can bust the sonic welds ,but it tends to be
messy.

        The most common failure I found was a blown fuse, usually due to a
failure of the internal power supply in the //c.  FWIW, there are still
circuit breakers made by Littlfuse that work just peachy-keen in place of
the fuse (derate the breaker by about 25% to 50%, tho ... that is, if it's
a 3amp fuse, get a 4a to 4.5a circuit breaker.)

        RwP

> ----
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> Internet: tomk@pro-nsdapple.cts.com
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-- 
Ralph Wade Phillips, CET #LA-82
ralphp@gcstation.net