Duex 5 fan short

lopu

I have accidentaly shorted one of the fan outputs. Connected steppers don´t work, did i just fried all the stepper drivers or some mosfet or cap ? Only thing connected that works is Bl touch.
Thanks for any help.

lopu

@lopu After connecting to USB and running for few seconds there is big source of heat from direction of chip U8 (SX1509B according to schematics from github)

Phaedrux

Are you talking about the main duet board or the duex?

Take a look here to see how far you can get.
https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond

Other than the hot U8 do you see any other visible damage on components?

lopu

@phaedrux

only the duex steppers dont work
The duet 2 is responding when connected to the USB and gets recognized in the device manager in COMs
only visible damage is one of the pins is melted but no chip is visibly cracked or damaged in any other way

Phaedrux

Can you get a clear close up shot of the board?

lopu

Of this area or the whole board ?

Phaedrux

The more pictures the better chance we can spot something.

lopu

If you need more pictures let me know

jens55

TR6 looks discoloured

lopu

@jens55 I just marked it with sharpie as i expected it to be dead before i marked it, it had the same colour as the rest.