Re: IIC External "Power Brick" Disaster --- Help!

[sebugg@presby.edu (Stephen Buggie)]

In article <D9K53L.19n@presby.edu>, Stephen Buggie <sebugg@presby.edu> wrote:
>
>P.S.:
>
>This is a followup.  So far, just one reader has sent a comment;
>more are solicited.
>
>II+/IIE POWER SUPPLY TO SUBSTITUTE FOR BLOWN IIC EXTERNAL BRICK?
>================================================================
>
>I have several II+/II+ power supplies, which give 12V DC and 5 V DEC.
>The IIc external brick is rated at 15 volts, but I suspect that 12 volts
>should work.   Possibly the 15 VDC rating was applied so that the IIC
>could be operated from 12V DC car batteries, which vary in voltage as 
>high as 15 volts.
>
>No that I have three blown IIC external power bricks, could I attach
>the IIC DC cable to the 12 V line on the II+/IIE power supply?
>The II+/IIe power supply gives 1.5 amps at 12 volts ---- is that 
>enough to power the IIC???
>
>Would there be any way to feed the 5V line directly into a IIC?
>On e of the copper fingers probably takes it...
>
>Anyone have the pin-out for the IIC DC power plug???  (Voltage readings
>pin-out).
>
>Thanks.     S. Buggie      sebugg@presby.edu
>
>
>888888888888888888888888888888888888888888888888888888888888888888888888888


Here are two follow-ups from readers::


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This is just a suggestion; I have ZERO Apple IIc experience.

But, I thought there was a recent posting about repairing a IIc
power brick. The technique was to CAREFULLY cut around the brick
(don't know which orientation to cut) to get through the skin.
Under that was a fuse. Replace fuse, then use some kind of glue
to seal the skin back up.


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>                         IIC POWER SUPPLY DISASTER:
>                         -------------------------
>                   IS THERE A FUSE INSIDE THE POWER BRICK?
>                   ---------------------------------------


I had a IIc power brick that spontaneously went dead upon power-up
once, so I opened it up.  I had to use a hacksaw.  There is a fuse
and it was a common variety.  But...when I replaced the fuse and
plugged it in, the fuse blew again so there was something wrong
within the power supply.  A lady in our user group had a similar
problem and was able to fix it by replacing one of the other parts
in the PS

Good luck...

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Subject: FIXING APPLE IIC EXTERNAL POWER BRICK
Cc: sebugg@presby.edu

        While trouble-shooting a neighbor's dead IIC, the computer dragged
down THREE of my external power bricks --- Good before, now dead.

        Please advise me on how to repair it!


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