Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!aramis.rutgers.edu!paul.rutgers.edu!jac
From: jac@paul.rutgers.edu (J. A. Chandross)
Newsgroups: comp.sys.apple
Subject: Re: Beware...
Message-ID: <Apr.10.17.00.24.1989.10596@paul.rutgers.edu>
Date: 10 Apr 89 21:00:24 GMT
References: <8904101252.aa26965@SMOKE.BRL.MIL>
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 21

ART100@PSUVM.BITNET ("Andy Tefft  862-6728", 814)

> A while ago my uncle gave me a drive, which would spin forever and
> track but never read or write. He knew from experience which chip
> was bad (an a/d converter i guess) and got me the chip, $1. plug-n-play.
> How much would it have cost to get it done at an Apple dealer? I
> shudder just thinking of it.

If you symptoms are:
	- drive recalibrates
	- drive spins forever
	- drive clobbers disk
then all you have to do is replace the 74123 (might be a 74125, it's been 
a long time since I fixed on) on the Analog board and your drive will work 
again.  I fixed dozens of drives this way; dealer chargers were $25 per 
drive.


Jonathan A. Chandross
Internet: jac@paul.rutgers.edu
UUCP: rutgers!paul.rutgers.edu!jac