Vevor compressor… the magic smoke came out!

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LayeredOgre

Member
Nov 22, 2019
59
34
Texas
Well after almost 2 years of abuse my cheapo vevor compressor has given up. Plugged it in and a POP and flash came from the power supply, took it apart to find this:
IMG_7075.jpeg

I haven’t done a whole lot of searching online yet for a pcb diagram of the power supply yet(s-600-12) but I can’t even tell what those busted parts were! If anyone could point me in the right direction I’d really appreciate it.
 
NTC probably stands for negative temperature coefficient. It's like a variable resistor it changes resistance based on temperature. Since it's negative temperature coefficient probably gets less resistive as the temperature increases. It's a current limiting protection device. Problem is finding the one with the right specifications if all the numbers were fried off. Quite commonly used to limit the in Rush turn on current. When you first turn the device on they are cool so they have a high resistance but as the power keeps flowing the resistance goes to a very nominal value that's so low it doesn't matter.
 
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BlackICE said:
NTC probably stands for negative temperature coefficient. It's like a variable resistor it changes resistance based on temperature. Since it's negative temperature coefficient probably gets less resistive as the temperature increases. It's a current limiting protection device. Problem is finding the one with the right specifications if all the numbers were fried off. Quite commonly used to limit the in Rush turn on current. When you first turn the device on they are cool so they have a high resistance but as the power keeps flowing the resistance goes to a very nominal value that's so low it doesn't matter.
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Searched a bit more and I think they were thermistors. Thank you so much, very informative!
 
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gendoc said:
you need to find the root cause of the failure before you go changing parts......... :unsure:
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Agreed, Vevor sells several HPA compressor platforms, if a rectangular box, oil-less, waterless, high-speed fan cooled, multi-power version, you've already surpassed the typical 18-month end-of-life limit. Monies spent for repairs might be better committed towards another compressor.
 
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gendoc said:
you need to find the root cause of the failure before you go changing parts......... :unsure:
Click to expand...
My only guess would be the constant vibration made something touch something else that it wasn’t supposed to. If I can get it working I’ll probably leave the compressor halfway disassembled with the power supply box out of the main box to stop it from being shaken so much. But any other ideas as to what could have gone wrong?
 
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