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Model: JVM1339BW 002	Brand: GE	Age: More than 10 years
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dean fedewa		#1 Posted : Thursday, May 13, 2010 5:23:08 PM(UTC)
Rank: Member Groups: Registered Joined: 5/13/2010(UTC) Posts: 1		Everything seems to work fine,It just started to humm after 1sec of hittin the start button.It will not heat now,but I only tried 30sec's a couple of times.Didn't want to mess anything else up...I can fix, just need help troubleshooting.THANKS MUCH.


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tvtech		#2 Posted : Friday, May 14, 2010 10:55:55 AM(UTC)
Rank: Member Groups: Registered Joined: 5/14/2010(UTC) Posts: 55		only 4 parts involved.. 1. big transformer (since its humming probalby ok) 2. big diode.. (check with meter) 3 big cap. (check with meter) 4. magnetron.. (normally the only checks i know of it to verify that with a clamp on amp meter that there is around 8-12 amp going to the magnetron. also unplug and verify that the 2 terminals of the magnetron are not shorted to ground the case)


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