Help finding value of burnt resistor. (lemmy.nz)

submitted 1 year ago by WaltzingKea@lemmy.nz to c/askelectronics@discuss.tchncs.de

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Mates bread maker stopped working so I had a look inside and saw this burned resistor.

I'm guessing the heat changed the colors a bit so wondering if anyone has experience in reading cooked resistor values.

I removed it from the PCB and measured it at 403 Ohms.

Thanks for any help.

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[-] WaltzingKea@lemmy.nz 2 points 1 year ago

Thanks! I'll try replacing it with a 490 ohm resistor and see if it works again.

The element in the bread maker looks like it came loose a bit and made slight contact with the internal metal housing. I wonder if that caused the resistive element to sink more current than the PCB was designed for, burning out the resistor.

[-] Saigonauticon@voltage.vn 2 points 1 year ago

That sounds like a possible fail state. Also shitty design. It should use a resettable thermal fuse or something to detect faults without parts burning.

Consider maybe adding a fuse to the design?

this post was submitted on 04 Jul 2023

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