Faulty Duet2 WiFi/Duex5???
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I've done some tests on the Duex5 board, and it seems there is an issue with the 12v side. When I change the fan voltage jumper to VIN, I get just under 24v over the fan pins, but when I set it to 12v, I get something like 7mV. Could I have blown something in the process of setting up the board?
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Photos of the wiring? Did anything change recently?
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did you check the firmware limitations to to verify that the heaters, therms and fans can get arranged between boards?
if i understand it rignt (not sure if i do) you have to have all the associated heater/fan/therms on the same board.
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Thanks @Phaedrux & @sinned6915 for your comments. I have, however, found the issue, and it does appear I have fried my boards :(.
I used a little toolboard I found online (see pic), and although it worked for a few months, it appears that the 12v on the HE and Parts fan, is also connected to the HE heater on this little board, so is shorting. Although not immediately, I expect this has caused severe damage to both boards over time, which has now shown itself.
I guess you live and learn! Something I should've double checked prior to using this board!!
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Yes the Duet switches PWM on the negative side, so you can share the power line, but not the ground lines.
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what did you fry exactly ?
did you check the fuses? -
hey @hackinistrator, definitely the 12v side on the duex5. There are no blown fuses, but the 12v does not work at all anymore. I'm still checking the duet2, but there are a couple of headers that no longer works (1 x pwm fan & 1 x always on fan). Can maybe save some of the board and use on a smaller printer (maybe a board for my ender3)...
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@jch what is "12V" ? is that your input voltage ?
you have 3 leds on the side of the board - Vin 3.3v and 5V , do all work ?
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@hackinistrator the Duet2 board is still partly functional, although the two headers I mentioned is still not working, so trying to see what's up there.
I have found the issue on the Duex5 board, however. The 4403T regulator IC has blown, so I expect this is the cause of the Duex5 failure. I will see if I can get another IC and try a repair, but I expect if this regulator has gone, there are likely other components that's failed as well.
The 12v I mentioned relates to the Duex5 and the "Fan Voltage Select"
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@hackinistrator I also now found the issue with the Duet2. I've got a failed component on the Fan0 Mosfet Control. Component TR5 has failed. Well, actually more than that. It's got a "big" chunk missing.
Maybe I can repair the two boards.......
