[TechAssist] Re: microwave
- From: Bil Green <tv.vcrrepair@xxxxxxxxxxx>
- To: Ed <techassist@xxxxxxxxxxxxx>
- Date: Fri, 26 Dec 2003 11:57:48 -0800
Make sure to discharge the cap first. Deadly
--
Best regards,
Bil Green
2001 TV VCR
Mammoth Lakes, CA 93546
760-934-2001 mailto:tv.vcrrepair@xxxxxxxxxxx
Friday, December 26, 2003, 11:34:12 AM, you wrote:
E> With my hv probe, the ground connected to one of the leads going to the mag
E> its measuring about 3 kv, which would be -3kv, if the mag is getting
E> filiment voltage, does that pretty much insure everything is working ok, and
E> the mag is bad?
E> Ed Video Pro-Tech Mesa AZ
E> ----- Original Message -----
E> From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
E> To: <techassist@xxxxxxxxxxxxx>
E> Sent: Friday, December 26, 2003 12:22 PM
E> 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
E> 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).
E> 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
E> 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
E> 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
E> i
>> > > >should look for, its a 1998 model GE, model JVM1450WA
>> > > >
>> > > >
>> > > >>> Ed Video Pro-Tech
>> > > >>> Mesa AZ
>> > > >>>
>> > > >>>
>> > >
>> >
>>
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