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Path: utzoo!watmath!clyde!cbosgd!ihnp4!ucbvax!decvax!bellcore!petrus!copp
From: copp@petrus.UUCP
Newsgroups: net.video
Subject: XL100 Problem
Message-ID: <5400007@petrus.UUCP>
Date: Thu, 26-Sep-85 14:17:00 EDT
Article-I.D.: petrus.5400007
Posted: Thu Sep 26 14:17:00 1985
Date-Received: Sun, 29-Sep-85 05:12:08 EDT
Organization: Bell Communications Research, Inc.
Lines: 15
Nf-ID: #N:petrus:5400007:000:755
Nf-From: petrus!copp    Sep 26 14:17:00 1985

I have a 1976 RCA XL100 19" portable with an odd-ball problem.
Has anybody else seen it?

Every few hours--or minutes--the synch goes seriously out of whack.
The horizontal oscillator frequency drops to around 5 KHz and the vertical
size shrinks.  Fiddling with the horizontal hold control restores synch.

I have the SAMS Photofact (TM) for the set, and I have made all the checks
you can make with a (FET) ohmmeter on the horizontal/vertical module.
(This doesn't prove anything, since the problem only appears when the
set has been on for a while.)  Some twitching in the picture when the
set is working "correctly" makes me suspicious of the power supply,
but I have not checked it.

Any suggestions before I go looking for a 'scope to borrow?  TIA--