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Ask an Expert Forum Want to replace resistors myself, but need an advice
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Want to replace resistors myself, but need an advice

vladnech
vladnech over 5 years ago

Hi guys

 

It has been a long time since I soldered something, but with COVID-19 decided to dust off my knowledge about electronics.

My air-fryer Philips XXL (5 years old) stopped to switched on (after I felt the smell of something burnt out).

I found resistors got burnt - see pictures

.

I need your help what Om and W value of those ones?

Looks like they have 4 bands: Orange, Black, Black, Gold, which is 30 Om.

Not sure whether it is correct. Plus, not sure how to find W.

 

Thanks in advance for your help,

Vlad

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image
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  • jw0752
    jw0752 over 5 years ago +4
    Hi Vlad, I agree with Jan that the black capacitor near the transformer looks like it has over heated and is probably damaged. If you have a meter it would not hurt to measure the resistance of the heat…
  • dougw
    dougw over 5 years ago +3
    The power rating can usually be deduced from the physical size. These look to be about 1W. but I'm not sure from the picture exactly how big they are. . They don't look burned enough to be smelling burnt…
  • Jan Cumps
    Jan Cumps over 5 years ago in reply to vladnech +3
    L1 is an inductor. It indeed looks like there's a blowhole in the IC. For the glue-like compound: has something melted above the IC and dripped down on the IC?
Parents
  • Jan Cumps
    Jan Cumps over 5 years ago

    Are you sure it's those resistors that burned? It's not uncommon for them to discolour if used at their limit.

    Although the right one discoloured a lot image.

     

    What's on top of the IC? Is that glue, grease or damage?

    The black component just below the yellow transfo, is that a capacitor? If yes, it may be dead.

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  • vladnech
    vladnech over 5 years ago in reply to Jan Cumps

    Hi mate

     

    Thanks for your prompt response.

    I attached additional pictures.

     

    On the top of IC - it is the glue.

    I did make the picture of capacitor.

     

    Thanks,

    Vlad

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  • Jan Cumps
    Jan Cumps over 5 years ago in reply to vladnech

    I think the resistors had a hard time but they did not burn. A burned power resistor is powder.

    The capacitor looks bad. Can you please take a photo of the markings. 5 photos from the top is enough image

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  • Jan Cumps
    Jan Cumps over 5 years ago in reply to vladnech

    I think the resistors had a hard time but they did not burn. A burned power resistor is powder.

    The capacitor looks bad. Can you please take a photo of the markings. 5 photos from the top is enough image

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