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- Path: sparky!uunet!gatech!purdue!yuma!longs.LANCE.ColoState.EDU!pm860605
- From: pm860605@longs.LANCE.ColoState.EDU (Peter Mckinney)
- Newsgroups: comp.sys.zenith
- Subject: Re: 1490 FTM Monitor whines
- Message-ID: <Sep09.191311.85986@yuma.ACNS.ColoState.EDU>
- Date: 9 Sep 92 19:13:11 GMT
- References: <1992Sep9.172725.21450@magnus.acs.ohio-state.edu>
- Sender: news@yuma.ACNS.ColoState.EDU (News Account)
- Reply-To: pm860605@longs.LANCE.ColoState.EDU (Peter Mckinney)
- Organization: Engineering College, Colorado State University
- Lines: 28
-
- In article <1992Sep9.172725.21450@magnus.acs.ohio-state.edu>,
- hcolijn@magnus.acs.ohio-state.edu (Hendrik O Colijn) writes:
- > I have a Zenith 1490 FTM monitor that has developed a VERY
- > annoying whine from (I assume) the flyback transformer. Can
- > anyone suggest a fix. The whine is so bad that the computer is
- > virtually unusable.
- >
- > Thanks, Henk
- > --
- > ============================================================================
- > Henk Colijn The Ohio State University
- > colijn.1@osu.edu Campus Electron Optics Facility
-
- I had an older Zenith CGA monitor that developed a whine
- after a while. The problem turned out to be a bad solder joint
- on one of the boards. After enough use and poor cooling, one
- solder joint finally became loose enough so that it would
- oscillate at an audible frequency.
- The solution was to try and pinpoint the area it was
- coming from and re-solder everything in that area. Alternatively,
- one could "poke" at various likey bad (oscillating) solder joints
- (with a non-conductor :-) ) in an attempt to find the culprit.
- The inside of a monitor is *not* a safe place however, and caution
- *must* be used near the high voltages at back end of the tube.
- This isn't a slick solution, but it worked for me. Good luck,
-
- - Pete McKinney
- - pm860605@longs.LANCE.ColoState.Edu
-