Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!ubc-cs!alberta!calgary!ctycal!ingoldsb
From: ingoldsb@ctycal.COM (Terry Ingoldsby)
Newsgroups: sci.electronics
Subject: Re: Microwave Oven Repair
Summary: Stack diodes
Message-ID: <460@ctycal.UUCP>
Date: 14 Sep 89 18:45:17 GMT
References: <10931@fluke.COM>
Organization: The City of Calgary, Ab
Lines: 17

In article <10931@fluke.COM>, inc@tc.fluke.COM (Gary Benson) writes:
> Last night my 4-year old Tappan microwave oven chattered, buzzed, and died
> in the middle of baking some potatoes. Removing it from the counter, I heard
> some rattling noises inside, so down on the floor, I kind of jiggled it, and
> confirmed that yup, something was in there. Continued jiggling resulted in
> half a rather large diode dropping out onto the rug.

It sounds like the stack diode is gone (stack diode = a bunch of diodes in
series to give a very high voltage rating).  You should be able to solder
a new one in place without disturbing any of the microwave producing
components.  I believe there is a SAMS book on microwave repair you might
want to consult.  

-- 
  Terry Ingoldsby                       ctycal!ingoldsb@calgary.UUCP
  Land Information Systems                           or
  The City of Calgary         ...{alberta,ubc-cs,utai}!calgary!ctycal!ingoldsb