1 Topic by ultradonut

  • ultradonut
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  • Registered: 2019-03-11
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Topic: Davinci AIO shorted LED 12v

I have a new to me AIO that has repetier flashed and was working fine stock. I was trying to add a layer fan for PLA and looking for where I could pull some power. While checking the wires from the Scanning LEDs I accidentally shorted the 12v. Now I don't seem to be getting any power to the steppers or case LEDs. The system is responsive and when hooked up to repetier host I can heat the bed and nozzle but I just have nothing else in the case.
All 3 voltage LEDs are lit on the board, the power supply seems to be putting out 12v at the connector and I checked the 0 ohm resistors R279,R280,R281 and all are showing connectivity.

I'm at a loss looking for other resistors that might have blown. I did do a search on these forums and found some helpful info in identifying the resistors, but most trouble seems to be with the heated bed or nozzle. I didn't find anything regarding the LEDs.

Any direction at this point would be appreciated.

Thanks for any help

2 Reply by ultradonut

  • ultradonut
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Re: Davinci AIO shorted LED 12v

Might have found the problem. It looks like R56 is open. Now I just need to figure out how I can resolve this.

3 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
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Re: Davinci AIO shorted LED 12v

It should just be a zero ohm resistor. You just need to measure the physical size and order one of the same size from Mouser and desolder the old one and solder in the new one. If that is beyond your skills then you could just get a regular fuse holder with wire leads solder that across the resistor and then you can just replace the fuse when it blows.

The only question is what value does the fuse need to be if you don't use a zero ohm resistor.

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