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From: russotto@eng.umd.edu (Matthew T. Russotto)
Newsgroups: comp.sys.mac.misc
Subject: Re: Mac II hardware problem
Message-ID: <1990Jul13.133342.6545@eng.umd.edu>
Date: 13 Jul 90 13:33:42 GMT
References: <14418@csli.Stanford.EDU>
Sender: news@eng.umd.edu (The News System)
Organization: College of Engineering, Maryversity of Uniland, College Park
Lines: 64

In article <14418@csli.Stanford.EDU> francis@csli.stanford.edu (Dave Francis) writes:
>I have a Mac II that suddenly doesn't respond to the mouse or keyboard.
>(ADB ports seem to be screwed up). I tried different mice and keyboards
>and also switched ADB input ports on the back of the machine, no luck.
>I called an Apple repair place and explained the problem. The person said
>that the "logic board is fried" and I need an entire new one (quote ~$400)
>
>Is there another way out of this? The solution seems a little overkill.

Here's an article I saved-- the chip mentioned may not be your problem, but
its not an expensive way to find out:

>From: alex@grian.cps.altadena.ca.us (Alex Pournelle)
Newsgroups: comp.sys.mac.hardware
Subject: Re: SE Hardware Questions: IWM upgrade, ADB filter
Message-ID: <1990Jun29.023115.17071@grian.cps.altadena.ca.us>
Date: 29 Jun 90 02:31:15 GMT
References: <1990Jun28.084809.9067@grian.cps.altadena.ca.us>
Organization: Workman & Associates

alex@grian.cps.altadena.ca.us (Alex Pournelle) writes:
(And don't you follow up your own articles?)

>Symptoms [on the croaked SE] are the usual crackling and ticking noises
from the power
>supply on startup, then nothing.  Occasionally we got startup, but then
>the keyboard and the mousk wouldn't move the cursor or do any functions.
>Aargh.  Had to just turn it off (contrary to my every instinct).

>After a bit of fiddling, we determined that the ADB filter chip is
>likely the culprit (hot and smelly).  Anybody know who makes or where to
>get?  It's by "Tokin", not known to us.  This is the newer board with an
>ADB chip instead of much discrete glue (I sure hope IT'S okay or we're
>really up a creek).

Courtesy Thomas Burton (Rory) Bolt VI:

	Tokin part number 155-007-C (7458) is actually an Apple part number
for the Tokin D-16-C. Single unit price is under $5.00. Specifications available
upon request.  You may reach Tokin via the following:
	
			Tokin America, Inc.
			2261 Fortune Drive
			San Jose, CA 95131
			Voice: (408) 432-8020
			Fax:   (408) 434-0375

>My first call tomorrow is to Pre-Owned but I thought this an appropriate
>subject for net bandwidth.

And Pre-O and Maya don't sell the parts alone.

	Alex
-- 
		Alex Pournelle, freelance thinker
		Also: Workman & Associates, Data recovery for PCs, Macs, others
		...elroy!grian!alex; BIX: alex; voice: (818) 791-7979
		fax: (818) 794-2297    bbs: 791-1013; 8N1 24/12/3


--
Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
][, ][+, ///, ///+, //e, //c, IIGS, //c+ --- Any questions?
		Hey!  Bush has NO LIPS!