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Re: Apple II- Repair
- Subject: Re: Apple II- Repair
- From: Linards Ticmanis <ticmanis@coli.uni-sb.de>
- Date: Mon, 01 Jul 2002 23:03:46 +0200
- Newsgroups: comp.sys.apple2
- Organization: University of Saarland, Computing Center, Germany.
- References: <T_PT8.64945$Ca2.3864688@bin2.nnrp.aus1.giganews.com>
- User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020529
- Xref: archiver1.google.com comp.sys.apple2:20897
Bryan Parkoff wrote:
> 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.
With the exception of the RAM and ROM chips, all other chips from the
Apple II and II+/II europlus boards are still readily available at any
good electronics store and they're not too expensive. If you have two
boards, you might try swapping over the chips one by one (of course you
have to turn power OFF before removing or inserting anything!). This way
it is easy to find out what is wrong, and then you only have to buy
those chips that are actually broken.
--
Linards Ticmanis
The Master said, "The business of laying on the colors follows the
preparation of the plain ground."