Duet 3 5V issue

OscarGM

When I try to connect my Duet 3 to my BLV Mgn Cube It doesn't supply the 5V neither SBC nor BLT, after that I plugged the usb cable to Duet 3 and both work fine, but the internal 5V doesn´t work, I Try to change the 5V jumpers configuration without success.
I think that my internal 5V supply is dead. Any idea to make it work?

A Former User

Just for clarity the default settings did not give you 5V LED when you apply Vin? (if so then, yes, sounds like its faulty)

From the wiki:

The default 5V power configuration is Internal 5V enable - jumpered, 5V->SBC jumpered (the Duet is powering the SBC) , SBC->5V* not jumpered. If you want the SBC to provide 5V to the Duet then remove the jumper from 5V->SBC and from Internal 5v En. Place a jumper on SBC-5V*. NOTE this bypasses the 5V protection and a fault on the SBC may damage the Duet.

dc42

Is the 5V_IN jumper definitely in place?

Is the 12V supply working? If so then the amber LED should be lit. If not, check the VIN fuse.

OscarGM

@bearer yes the 5V Led is off

OscarGM

@dc42 yes the jumper is in place and 24V PSU is supplying the board but the 5V led is off.

A Former User

And the other LEDs (with Vin connected)?

OscarGM

@bearer 24V only
V_Fused and 12V Leds on
24V+USB
4 Leds on

A Former User

Its over to @dc42 at this time i think

droftarts

@OscarGM From those pictures, with 24V input there's no 5V or 3.3V LEDs, they only light up with USB power. It also looks like jumpers are on 'Internal 5V enable' and '5V->SBC' correctly. I can only assume the 5V regulator is dead, but can't see any damage to it. @dc42 to confirm?

Ian

droftarts

@OscarGM The 5V regulator is the 8-pin chip by the corner of the inductor marked 6R8. Yours (bottom right):

I can't see anything obviously wrong. @dc42 ?

Ian

A Former User

~~Looking closer the part to the left of it isn't level, but are you sure about that being the 5V regulator? (Schematic says U5 and tiny 16 pin QFN chip)~~ (Wrong board)

OscarGM

@droftarts I don't know if this can clarify something https://www.dropbox.com/s/cxmiagz20t1ytjx/5V%20Regulator%20Duet%203.jpg?dl=0)

dc42

@OscarGM, thanks for your patience. I approve a warranty replacement for your Duet 3 main board,

OscarGM

@dc42 thank you.
Do I have to do something about the process?

droftarts

@OscarGM I think you've already emailed us, I'll sort it out.

Ian

droftarts

@bearer said in Duet 3 5V issue:

~~Looking closer the part to the left of it isn't level, but are you sure about that being the 5V regulator? (Schematic says U5 and tiny 16 pin QFN chip)~~ (Wrong board)

I did that too! I looked at the 3HC schematic by mistake. It made me doubt @dc42 ... but only for a minute or two!

Ian