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  1. #1

    Anet a8 Def error ohm reading

    Hi!

    I just finished building my Anet A8 printer. The first print worked fine, I set it to "cooldown", then unplugged it after a few mins. Now, a few hours later, it will no longer print. Both temps say "def".

    I have:
    Soldered the heatbed wires on the heatbed
    Re-soldered the thermistor on the heatbed

    The ohms are as follows: Extruder; 110-120k ohm
    Heatbed: 55-59k ohm
    (unconnected)

    When the heatbed is connected to the mobo, it measures 5.7k ohm. The extruder measures 16-17ohm when connected.

    Any suggestions?

    Cheers

  2. #2
    Just did some more troubleshooting...

    Soo, new firmware. Now it shows: 364C extruder, 36C heatbed. The heatbed is a bit too high, but it responds to heat (goes upp to 43C when I hold the thermistor). When I plug the extruder thermistor into the heatbed socket, it shows 24C, and goes upp to 34C when I hold it. Now, to the odd part, the extruder always shows 364C, no matter if it is plugged in or not.

  3. #3
    Could that help?

  4. #4
    Reflow done. Now extruder says 295C. Maybe less shorting, or something like that? Ill try another reflow now.

  5. #5
    Also, "long" beep when I put the multimeter on both pins on E_T; but not on the others.

  6. #6
    Seems like its C47 that is broken, from what I can tell. I assume that is a capacitor? Can I switch it for any capacitor, or do I need a specific one?

  7. #7
    I went ahead and bypassed it. Started upp, but now both extruder and heatbed are showing wrong temps.

  8. #8
    Ok, so random capacitor did the trick. However, now the heatbed is showing wrong temp, but the extruder is working.

  9. #9
    Probably did mess the heatbed capacitor upp, hehe. Going to try another reflow on it, if that doesnt work; new capacitor (ill use the same one that I put on the extruder, it seems to work well)

  10. #10
    I dont know how, but new capacitor did the trick. Both temps now working!

    THanks for the help!

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