Monochrome jitters

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Article #7053

#7053

From: Jim Hurley
Date: Mon, 15 Jan 1990 18:24

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I have an Atari monochrome display that's about 5 months old.
Recently, it's gotten the jitters and they're getting worse.
The symptom is a jittery screen display, but only the top half
of the display is affected. The symptoms appear only after the
unit warms up. The unit was rock-steady when new.
My guess is that it's a heat-related horizontal sync problem.
I have noticed this problem on at least one other monochrome monitor.
Anyone know the cause and cure? If I had schematics I'm sure I
could troubleshoot. Thanks in advance.

-- 
Jim Hurley                 domain:   jimh@ultra.com
UltraNetwork Technologies  Internet: ultra!jimh@ames.arc.nasa.gov
101 Daggett Dr.            uucp:     ...ames!ultra!jimh
San Jose, CA 95134        (408) 922-0100

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!spies!zorch!ardent!mips!ultra!jimh
From: jimh@ultra.com (Jim Hurley)
Newsgroups: comp.sys.atari.st
Subject: Monochrome jitters
Message-ID: <1990Jan15.182430.2495@ultra.com>
Date: 15 Jan 90 18:24:30 GMT
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Organization: Ultra Network Technologies
Lines: 16