Question about Microwave Ovens
Door interlock repair on Sharp microwave, model J-409 JSF
The microwave oven lights up, counts down, but no cooking action. Thanks!
High voltage power supply for the magnetron is likely problem. Multi-thousand-volt section--be careful.
Posted on Jul 12, 2009
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Posted on Jan 02, 2017
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Jan 22, 2011 | Sharp R-930AK Convection/Microwave Oven
The magnetron may have either failed or
is not being supplied with the extremely high voltage required to run
Make sure the !!!!capacitor is discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 on high resistance range for short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.
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