Article View: sci.electronics
Article #1521Microwave oven blowing fuses
From: Les Bartel
Date: Tue, 21 Jul 1992 18:56
Date: Tue, 21 Jul 1992 18:56
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I have a GE microwave oven that is blowing fuses when the high voltage transformer is switched on by the triac when using the 'low' or 'medium' settings. The triac is turned on by an opto-isolator driven by the timer board. When the triac turns on, my ammeter shows about a 40 amp surge (the needle moves to about half scale, I don't know how much is needle inertia, because the triac shuts off immediatly [and it should with that kind of load!]). Another indication of the surge is a slight dimming of the lights on that circuit at the same time. When operated on high, the oven works fine. My question is: Is it likely to be a bad triac, or timer board? The oven was manufactured in 1983 and has given me no problems at all with daily use (except for a few burned out bulbs). - Les -- Les Bartel lester@naomi.b23b.ingr.com Dazix, An Intergraph Company uunet!ingr!b23b!naomi!lester
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!infonode!ingr!b11!naomi!lester From: lester@naomi.NoSubdomain.NoDomain (Les Bartel) Subject: Microwave oven blowing fuses Message-ID: <1992Jul21.185605.6588@b11.b11.ingr.com> Sender: usenet@b11.b11.ingr.com (Usenet Network) Reply-To: lester@naomi.b23b.ingr.com Organization: Dazix, An Intergraph Company Date: Tue, 21 Jul 1992 18:56:05 GMT Lines: 18