Blown Fet?
-
So I shorted my duet wifi + duex5 by accident. 100% my fault (It was late and I wasn't paying attention) So I ordered both a new duet wifi and duex5. I reconnected everything and forgot i was running LEDs and Fans on my duex5 on 12v! ( I know Im not a smart person). Shortly after that I switched the jumper to 12v. Replaced the fans and leds. I'm having an issue now where everything on the duex works except anything on the 12v line. Did I blow a mosfet? or is the issue on the duet? There is no visual damage or smell on anything on the board. Any help is appreciated. Thank you.
-
Did you enable the 12V regulator on the DueX5, by putting a jumper across the 12V_EN pins?
-
@dc42 I did after I blew the old fans / leds. I even used a new duex5 and they didnt work
-
By "they" I mean the new 12v fans and LEDs I added
-
It sounds to me that the 12v regulator on the DueX5 isn't working. If you have a multimeter, you could check for the correct voltages at various points:
- VIN at one end of D6, and about 0.3V less on the other end and on C3
- VIN on either end of L1 (take great care not to short the probe against the adjacent IC!)
- +12V on either end of L3
-
@dc42 thats what I assumed, but I literally bought a new duex5 board to see if the duex5 was the one that was ruined and still nothing worked
-
@dc42 tried a brand new duex5 and 12v still doesn't seem to work. VIN on the duex works. Could it be something on the duet wifi?
-
@dc42 The Duex 5 boards i received from filastruder did not have a jumper on 12_EV. Both boards are v0.8a. I took the jumper off my older v0.8 put it on the v0.8a on 12_EV and the 12V line worked
-
@minasokoni said in Blown Fet?:
@dc42 The Duex 5 boards i received from filastruder did not have a jumper on 12_EV. Both boards are v0.8a. I took the jumper off my older v0.8 put it on the v0.8a on 12_EV and the 12V line worked
But I thought you said you said on 29 May that you fitted the jumper?
-
@dc42 On the v0.8 boards there is a jumper on 12V_EN already. On the rev A the 12V_EN pins don't have a jumper so when the user switches the Fan jumper select nothing happens on 12V UNLESS there is a jumper on 12V_EN.
https://i2.wp.com/betrue3d.dk/wp-content/uploads/2017/06/Duex5-jumpersfor12v.jpg?ssl=1- Is the 12_V EN - I bought two v0.8a boards and both did not have a jumper on them. So I assumed the 12V line was broken.
Just a heads up for people who get the rev A duex5
