Question about Sharp Microwave Ovens
If the operation is otherwise normal with the exception of heating food, common causes include; (to diagnose requires discharging of the HV capacitor) if you are inexperienced with working with HV I suggest seeking professional help.
Open thermal protectors or thermal fuses.
Open HV Diode.
Open HV capacitor
Open magnetron filament
Open winding in HV transformer
Defective HV relay
Shorted HV diode
Short or other fault in the magnetron
Short in certain portions of the HV wiring
Replacement Magnetrons (the most likely cause if not charring or defective components are found when troublshooting the small parts, can typically be had for around $45.00 just do a web search for your model number.
Posted on Sep 07, 2010
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Posted on Jan 02, 2017
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