Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!uwmcsd1!lakesys!rich From: rich@lakesys.UUCP (Richard Dankert) Newsgroups: comp.sys.atari.st Subject: Re: SC1224 Monitor Buzz . . . Message-ID: <174@lakesys.UUCP> Date: 7 Dec 88 05:40:18 GMT References: <111500011@uxa.cso.uiuc.edu> Reply-To: rich@lakesys.UUCP (Richard Dankert) Organization: Lake Systems - Milwaukee, Wisconsin Lines: 51 In article <111500011@uxa.cso.uiuc.edu> mts10271@uxa.cso.uiuc.edu writes: > >My SC1224 also has a high pitched buzz (not just the usual one). Do they all >do this (it is a Mega-styled one)? >Is there a cure? > > > > Mike Stepniczka > mts10271@uxa.cso.uiuc.edu In article <111500011@uxa.cso.uiuc.edu> mts10271@uxa.cso.uiuc.edu writes: > >My SC1224 also has a high pitched buzz (not just the usual one). Do they all >do this (it is a Mega-styled one)? >Is there a cure? The high pitched buzz that many have been experiencing is most likely the High Voltage transformer (aka: Flyback). As the monitor is made by GoldStar, and I have run into this many times before, it is not too unlikely. It also may be perhaps the power supply, as is I am not mistaken, they are utilizine a switching type power supply. At least thay do in the SC1224 (color) monitors. I have seen reference to turning off the mono monitor for it may case a breakdown. Perhaps, but I doubt it. The snap that was described sounded like the high voltage dropping then back up because the video had disappeared for a moment. The pattern described sounds like what is known as Keystone, which usually indicates a bad yoke. In refernce to the fadded white Horiz line at first, that seem to disappear after the monitor warms, sounds like yuo are seeing retrace lines, which could indicate a CRT as being soft, or the screen driver being set too high. I personally have both monitors, and since 1985 have yet to have a problem with either. rich..... UUCP: {uwvax}!uwmcsd1!lakesys!rich