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From: ftw@masscomp.UUCP (Farrell Woods)
Newsgroups: comp.sys.atari.st
Subject: Re: Mono monitor problems
Keywords: Atari, ST, monitor, problems
Message-ID: <1211@masscomp.UUCP>
Date: 22 Jul 89 13:33:14 GMT
References: <936@ultb.UUCP>
Reply-To: ftw@westford.ccur.com (Farrell Woods)
Organization: Concurrent Computer Corporation - Westford, Ma
Lines: 25

Two folks have mono monitor problems, so I'll address both here.

To the fellow who has a linearity problem (the characters at the top of
of the screen get tall, etc.): Go to Radio Shack and get yourself a can of
"freeze mist".  Also, arm yourself with a handheld hair dryer.  With the
monitor running, and the back off, use the hair dryer to heat the innards
some.  This should cause the problem to appear more quickly than it would
otherwise.  Then, take the freeze mist and carefully zap components in the
vertical circuitry.  Observe the picture while you do this.  When the picture
snaps back to "normal", you have your faulty component.

To the fellow with the jitter and bends:  The jitter might be fixed by
adjusting the "vertical hold" pot.  I don't recall its location; it's been
a while since I've had my monitor apart.  For the bends, it's probably caused
by a little too much enthusiasim when the previous owner stretched the picture.
You might try backing off on some of those adjustments.  The rings you see
on the back of the yoke are for centering the picture on the face of the tube.



-- 
Farrell T. Woods				Voice:  (508) 392-2471
Concurrent Computer Corporation			Domain: ftw@masscomp.com
1 Technology Way				uucp:   {backbones}!masscomp!ftw
Westford, MA 01886				OS/2:   Half an operating system