So, I blew up a WK8 P9 at TR5

[Legrand]

As the subject says, I have a Duet WiFi, V1.02, and a wire was ripped from the hot end assembly (fan wire, if I recall correctly) which shorted the board. The board boots up but it's not working correctly anymore. It appears as though a component labeled "WK8 P9" (transistor, I assume) with three leads on it located at TR5 blew up.

Can someone tell me what this is so I can attempt to get a replacement and fix the board?

Thanks.

[grizewald]

TR5 is a PMV40UN2 N-Channel MOSFET.

Data sheet here: Nexperia PMV40UN2

It controls the part cooling fan, so that matches with the short circuit.

[Legrand]

Awesome. Thank you!

[worekarolis]

Anyone knows if PMV40UN2R is the same ting? Cant get PMV40UN2 anywhere

[droftarts]

@worekarolis see https://docs.duet3d.com/en/User_manual/Troubleshooting/Parts#fan-mosfet for alternatives.

Ian

[dc42]

@worekarolis is the board working apart from that fan output?

[worekarolis]

@dc42 @dc42 Yes seemingly everything works except fan and smart effector lights.

Also I think I've found right MOSFET:
https://www.digikey.com/en/products/detail/onsemi/MMBFJ211/1049196

[dc42]

@worekarolis that mosfet is not suitable.