Path: utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!ames!pacbell!att-ih!ihnp4!inuxc!iuvax!pur-ee!uiucdcs!uxc.cso.uiuc.edu!clio!berger
From: berger@clio.las.uiuc.edu
Newsgroups: comp.sys.ibm.pc
Subject: Re: Mitsubisi monitor patch
Message-ID: <16800232@clio>
Date: 14 Mar 88 22:48:00 GMT
References: <331@upvax.UUCP>
Lines: 17
Nf-ID: #R:upvax.UUCP:331:clio:16800232:000:627
Nf-From: clio.las.uiuc.edu!berger    Mar 14 16:48:00 1988


The pincushioning is symptomatic of a failing flyback transformer or
inadequate power supply.  Older TV's used to have pincushion correction
circuitry - I thought that was less common with newer monitors.

Without a schematic, it's hard to tell what the modification does.
It probably adds a DC bias voltage somewhere.  I'd still worry about
inadequate monitor design, and wonder how long it will be before a
more serious problem develops.

			Mike Berger
			Department of Statistics 
			Science, Technology, and Society
			University of Illinois 

			berger@clio.las.uiuc.edu
			{ihnp4 | convex | pur-ee}!uiucuxc!clio!berger