Re: Microwave oven



"Retired" <everettlarsen@xxxxxxxxxxxxx> writes:

I have a GE microwave oven that just stopped heating. I have checked
and found the problem to be in the high voltage section. I found the
high voltage diode shorted and the high voltage capacitor going bad.

What do you mean by "going bad"?

I've replaced both of these, but it still does not heat. When I
rechecked I again found the diode shorted within 1 minute of running.

Was it heating during that 1 minute?

The magnetron tube was replace 3 months ago and the transformer tests
good. The magnetron tube show no short to case. Also no shorts in
transformer, and correct ohms on each winding. Has anyone run into
this, or have any ideas?
Retired

There's only 4 parts there - HV transformer, HV capacitor, HV diode,
magnetron. It's unlikely that the HV transformer could go bad in a
way that would not result in a blown fuse or lots of smoke.

The magnetron could be defective and show up only with HV applied.

What abouut the condition of the waveguide and the rest of the oven?

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.
.



Relevant Pages

  • Re: Wiring for halide lamp
    ... "magnetron" transformer, but I have no idea where to find one, either. ... too high voltage, and too low current. ... Andrew Gabriel ...
    (sci.engr.lighting)
  • Re: Suggestions for 1kW, unregulated SMPS
    ... consist of a custom-wound mains transformer with a bridge rectifier ... an SMPS. ... The only tricky part that I'm aware of is the design of the gate ... You will be needing some high voltage differential probes. ...
    (sci.electronics.design)
  • Re: Fallen TV - no picture, sound OK
    ... idea where my problem may lie, but I thought I should ask anyway, ... to the plug). ... Does this mean a transformer is ... It's probably the circuit board that is broken around the high voltage ...
    (sci.electronics.repair)
  • Re: Few, Fewer, Fewest
    ... that were the high voltage connection, ... The terminals and the transformer were substantial enough ... that a convenient way to pick up the power supply was to ...
    (alt.usage.english)
  • Re: Few, Fewer, Fewest
    ... that were the high voltage connection, ... The terminals and the transformer were substantial enough ... that a convenient way to pick up the power supply was to ...
    (alt.usage.english)