[TechAssist] Re: microwave

  • From: <tvservice@xxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 29 Dec 2003 08:37:18 -0600

Your magnetron is shot
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX

----- Original Message ----- 
From: "Ed" <edb3@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, December 26, 2003 1:34 PM
Subject: [TechAssist] Re: microwave


> With my hv probe, the ground connected to one of the leads going to the
mag
> its measuring about 3 kv, which would be -3kv, if the mag is getting
> filiment voltage, does that pretty much insure everything is working ok,
and
> the mag is bad?
>      Ed   Video Pro-Tech Mesa AZ
> ----- Original Message ----- 
> From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, December 26, 2003 12:22 PM
> Subject: [TechAssist] Re: microwave
>
>
> > This may be rather unconventional but in such as case I use a TV high
> > voltage probe, BUT you must connect the ground lead to the magnetron and
> put
> > the tip of the probe to the casing (ground) because it is negative DC I
am
> > measuring to see if the magnetron is getting or not (about -1.5
to -2KV).
> If
> > so, the magnetron must be bad. You should measure infinite resistance
from
> > the filament to the body of the magnetron so I don't see how you can
> measure
> > an open on the magnetron (except between the filaments).
> >
> > Bob Waterman, CET® #RI-28
> > Master Technician License #9109
> > Service Manager / Parts Manager
> > Gemini Computer, TV, & Security Alarms
> > (508)695-7302
> > (508)695-7769 FAX
> > geminitv@xxxxxxxxxxxxxxxx
> > geminitv@xxxxxxx
> > www.geminicomputertvsecurityalarms.com
> >
> >
> > ----- Original Message ----- 
> > From: "Ed" <edb3@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, December 26, 2003 2:04 PM
> > Subject: [TechAssist] Re: microwave
> >
> >
> > > Cant seem to find a reason for this thing not to heat, unless the mag
is
> > > bad, i can measure continuity across the mag term, its not open, or
> > > shorted.wiring seems to be ok, door switches are working, the hv cap
> > checks
> > > ok, so does the diode, hope someone has a idea. How much voltage
should
> > > there be at the magnatron filiment terminals? The hv xformer isnt
> shorted,
> > > and the windings are not open
> > >       Ed   Video Pro-Tech  Mesa AZ
> > > ----- Original Message ----- 
> > > From: "Doug Keller" <dek@xxxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Friday, December 26, 2003 8:32 AM
> > > Subject: [TechAssist] Re: microwave
> > >
> > >
> > > > May be a thermal sensor problem. Check them and also verify that the
> > > > airflow can get through the fins of the magnetron and help it to
cool.
> > > >
> > > > Doug Keller
> > > > Wis-Kel Electronics
> > > > 101 Freeland Ave.
> > > > Terra Alta, WV
> > > > USA        26764
> > > > dek@xxxxxxxxxxxxxx
> > > > http://www.tech-assist.org
> > > > "Learn from the mistakes of others, because you
> > > > won't live long enough to make them all yourself"
> > > >
> > > >
> > > >
> > > > Ed wrote:
> > > >
> > > > >Really havent checked anything yet, have never workedon one, just
> > wanted
> > > to
> > > > >get some ideas. I will pull it down later today, heated up a cup of
> > > coffee
> > > > >and it worked fine, the next cup it wouldnt heat, everything else
is
> > > running
> > > > >ok. Does the magnatron usually go that fast?
> > > > >    Ed   Video Pro-Tech
> > > > >            Mesa AZ
> > > > >----- Original Message ----- 
> > > > >From: "Doug Keller" <dek@xxxxxxxxxxxxxx>
> > > > >To: <techassist@xxxxxxxxxxxxx>
> > > > >Sent: Friday, December 26, 2003 7:49 AM
> > > > >Subject: [TechAssist] Re: microwave
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >>fuse?, power to trans?, HV? magnetron? What have you checked so
far?
> > > > >>
> > > > >>Doug Keller
> > > > >>Wis-Kel Electronics
> > > > >>101 Freeland Ave.
> > > > >>Terra Alta, WV
> > > > >>USA        26764
> > > > >>dek@xxxxxxxxxxxxxx
> > > > >>http://www.tech-assist.org
> > > > >>"Learn from the mistakes of others, because you
> > > > >>won't live long enough to make them all yourself"
> > > > >>
> > > > >>
> > > > >>
> > > > >>Ed wrote:
> > > > >>
> > > > >>
> > > > >>
> > > > >>>anyone here experianced on microwave ovens? This is a GE over the
> > stove
> > > > >>>
> > > > >>>
> > > > >type, quit heating this morning. Maybe there are some common
failures
> i
> > > > >should look for, its a 1998 model GE, model JVM1450WA
> > > > >
> > > > >
> > > > >>>      Ed   Video Pro-Tech
> > > > >>>               Mesa AZ
> > > > >>>
> > > > >>>
> > > >
> > >
> >
>
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