Path: utzoo!utgpu!attcan!uunet!lll-winken!pacbell!ctnews!mitisft!dold
From: dold@mitisft.Convergent.COM (Clarence Dold)
Newsgroups: unix-pc.general
Subject: Re: High pitched squeal/whine/warble
Summary: Better squeal fix
Keywords: fan whine bearing
Message-ID: <619@mitisft.Convergent.COM>
Date: 14 Apr 89 16:25:55 GMT
References: <9197@alice.UUCP>
Organization: Convergent Technologies, San Jose, CA
Lines: 29


in article <9197@alice.UUCP:, wilber@alice.UUCP (Bob Wilber) says:

: }I bought my 3B1 (2M/40M 3.51) 3rd hand about 3 months ago.  When I first got
: }it, it would whine occasionally, with about a 2 minute quiet period in

: This is a common problem, caused by the anti-static tab in the disk getting
: worn by the rotating spindle.

: To fix:

: Open up your 3b1 (the hard part :-( ), take out the disk drive, and remove the
: PC board at the bottom of the disk drive.  (Be sure to note how the connectors
: go so you'll be able to reassemble it properly.)  On the other side of the PC
: board you will see the copper anti-static tab.  Bend it down, away from the
: disk spindle, and reassemble.

: No harm seems to come from having the anti-static tab not quite touch the
: spindle.

Certainly, the drive will run without the spindle ground, in fact,
some drives don't even have them anymore.
It would be better to bend the tab TOWARD the drive.  The increase in pressure
will stop the chatter that you had been hearing.
-- 
---
Clarence A Dold - dold@tsmiti.Convergent.COM		(408) 434-5293
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		P.O.Box 6685, San Jose, CA 95150-6685	MS#10-007