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Sharp R84-ST Combi Microwave - Not Heating (microwave)

 
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bat.21



Joined: 23 Feb 2015
Posts: 3
Location: United Kingdom
PostPosted: Mon Feb 23, 2015 7:09 pm    Post subject: Sharp R84-ST Combi Microwave - Not Heating (microwave) Reply with quote
Food's not getting hot. Light Works, turntable works. Taken case off and checked the 2 internal fuses. Main 1¼" fuse is ok. 20mm, 8 Amp fuse had gone. Changed it twice, blew straight away, both times. It it the Magnetron, or is there anything else I can try?

Thanks
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jts1957



Joined: 24 Nov 2008
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PostPosted: Mon Feb 23, 2015 8:52 pm    Post subject: Reply with quote
I presume it only blows during microwave operation?
I also presume the first fuse is the ceramic 15 - 20 amp located live side of AC line cord circuit?

Where is 20mm fuse located physically, and if you know electrically?

Unplug either primary winding lead of Power (HV) transformer. If still blows fuse - Is NOT due to any HV component including magnetron.
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bat.21



Joined: 23 Feb 2015
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PostPosted: Mon Feb 23, 2015 9:22 pm    Post subject: Reply with quote
It's on the same board as the one you mention, and blows as soon as you press the start button to use the microwave function. I'll try what you suggest.
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jts1957



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PostPosted: Mon Feb 23, 2015 9:38 pm    Post subject: Reply with quote
Did not realize I had mentioned ANY board.
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bat.21



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PostPosted: Wed Feb 25, 2015 12:55 pm    Post subject: Reply with quote
sorry, you didnt, but both fuses are on a small circuit board where the incoming mains connects to.
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