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Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-11-2022, 05:54 AM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

update: Microwave is working. I put it back together, and buttons seem ok. Convection oven preheats ok too. Not sure what when wrong with the keypad, perhaps ribbon cable wasn't aligned or had some...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-06-2022, 10:40 PM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

Hey Red, thanks for the info :)

I did a rough wiring to the relay, connecting 12v from my PC psu ans 12v car bulb. Seems ok. There was a little crackling but I think that was due to poor contact...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-06-2022, 08:00 PM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

Thanks Red,

The noise only appears for a splt second after I turn on, but loud enough I can't pinpoint its source :/.

Unfortunately I don't have a bench psu, but I do I have a computer psu with...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-06-2022, 12:32 PM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

Thanks RJ. The LEDs work, when microwave is turned on, the screen lights up and you can see the numbers. issues I see are,

1. The odd crack sound and burning from the board
2. The LED showing #4...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-06-2022, 11:39 AM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

Thanks RJ. I had a look at Diode (75) and Diode (76), couldn't see any moisture. I rubbed a bit of IPA over them just incase, and i'll warm the board a little with the hot air gun

Question, I have...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-06-2022, 09:34 AM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

I decided to see how it goes as everything else looked dry and clean. Well, the clicking is gone and there was no smoke, but, there was some sort of crackle sound upon start up.

There's also a new...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-05-2022, 02:02 PM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

Hi RJ, thanks for the feedback,



I desoldered them earlier (and resoldered), but didn't notice any damaged solder joints. There doesn't seem to be any charring/heat damage to the relay section...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-05-2022, 09:39 AM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

Hey Sam, thanks for the feedback,




That's the one I thought you meant, though I was a little confused. In the pic (below), am I to disconnect the two spade terminals and connect them to the...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-05-2022, 02:43 AM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

Hi Sam, thanks for the feedback.



mmm, I'm not following. The input of the transformer (from mains), you want to put through a bulb, or the power into the relay put into a bulb instead of the...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-04-2022, 10:28 PM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

Thanks for getting back to me guys.



I didn't put any voltage through when testing. To these values change when voltage is applied? Should I not test when no power ?



The model is a Sharp...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-04-2022, 02:45 PM
Replies: 23
Views: 2,417
Posted By Widget
Re: Microwave started making rapid clicking sound and smoke

[update] I desoldered the other relays, they're the same model as the one in the picture above. There was a little surface water on the underside of the relays, but I didn't see any damage/burning on...
Forum: Troubleshooting Appliances and other Household Electronic Stuff 03-04-2022, 12:41 PM
Replies: 23
Views: 2,417
Posted By Widget
Sharp R-990K Microwave started making rapid clicking sound and smoke

Hi guys,

I cleaned the microwave, but now it makes a rapid clicking sound, then smoke appears. I had a look and it appears to be coming from the front touch panel. I have a feeling a little water...
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