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Re: Apple II- Repair
- Subject: Re: Apple II- Repair
- From: Stephen Shaw <bottrawler@junkbuster.zzn.com>
- Date: Fri, 19 Jul 2002 18:20:06 +0000 (UTC)
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On Mon, 01 Jul 2002 03:27:47 GMT, Bryan Parkoff wrote:
> Apple II- Repair
>
> I am looking for the information on the web site that it has an
> original Apple II mainboard reference. I have suspected that mainboard
> does not operate properly after the power supply is turned on. It displays
> in the screen that it shows the character blocks. Nothing work like reset,
> ctrl-b, etc.
> It may be possible that some IC chips are bad. Is it possible that I
> can purchase new IC chip that reads 74LS11N at the electronic store. It
> might solve the problem in order to bring mainboard back to normal. Please
> advise.
Yes, Radio Shack should have 74 series TTL logic chips. Do not take 7411, 74S11
as those are the standard and Schottky versions. An LS should still be
available. I do not know if the 74F11, 74HCT11, 74ACT11 or any other type will
work. If you get the latter, buy one, try it and see - it should do NO damage -
it might just not work.
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Real email address : stephen (at) junkbuster (dot) zzn (dot) com
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