
Apple II Computer Info
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### FILE : motherboard.power
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### Created : Friday, September 27, 1996 Modified: Friday, September 27, 1996
### File Type: "TEXT" File Creator: "LMAN"
### File Size: 5700 bytes 5 KB
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Newsgroups: comp.sys.apple2
Subject: Re: SecondSight boot stability
Date: 24 Aug 1996 09:48:44 -0400
Organization: America Online, Inc. (1-800-827-6364)
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(Bradley P. Von Haden) writes:
>
>
>>Fattening the PS +5V and GND leads cut glitching significantly. On
>>the motherboard, adding #16 gauge wires from the +5V and GND PS
>>connector pads to +5V and GND points on Slots 3 and 7 finished the
>>job. (Second Sight board users may need to fatten the +12V lead,
>>too) Anyway, no glitches-- the power supply "went good".
>
>
>Is this one of those modifications that if I am not sure how to do it
>I definitely should not try it?
>
>
That depends on your alternatives. If your GS is bombing regularly
and your setup fits the "power supply problem" profile, then _someone_
needs to do a fix. Maybe the local Apple Users Group could have a Power
Supply Fix meeting. Those familiar with the work required could guide
users through the motherboard and PS leads mods and check their work along
the way.
Regarding the motherboard additions: Most likely, nobody especially
likes to remove all cords and plugs, remove the Power Supply, pull out
cards, pop out the motherboard-- be sure to undo any hold-down bolts or
nuts-- and do mods. (Also, be sure to mark/label boards & cords and keep
notes of what goes where!)
Once you've got the MB out, the actual mod is not that bad a job. #16
gauge wire is fairly easy to work with.
Mainly, you will constantly be worrying about whether or not you are
Apple II Computer Technical Information : Apple II Family Hardware Info
ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 301 of 572
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