One year back I was using DUET Wifi. Due to wrong PLA fan wiring, it got short circuit. Due to other works I forget that.

Now I thought of repairing it. Any possibility of changing only the main chip?

I hope the facility may be available with DUET3d itself. If I ship the board, is it possible to get it replaced and ship back to us. I am at Hyderabad, India.

Now when connecting to board, all endstop LEDs are glowing.

Please find the attached images for references.

@dc42 Ok. Thanks for the quicker updates as always.

Thanks. I hope the Q1 is missing

I checked the schematic and found that Q1 is SFH 3015 FA-Photo transistor. I hope it will be available locally. Is it possible for us to replace?

I am using IR sensor with MKS Gen 1.4 board. It was working fine. I was having a 3d printed mount for the IR Sensor. Auto bed leveling with 9 points was enabled in Marlin and it worked fine

Last week I gave a big print of Eiffel tower by night. After 20%, the print collapsed and print became noodles of the structure. In that, it hit the IR sensor and broke the 3d printed mount. When I check in the morning, the sensor was lying in the bed.

Now I am trying to connect. But LED light was not at all glowing. I checked the continuity of the wires, that is fine.

How to troubleshoot? Thanks

@dc42
Ok. Thanks..

Also, how to check there is a short between +3.3V and +5V
I am located in India. Actually, I am having DUET Wifi-01no and DUET 0.6-02nos burnt with us.

Is it possible to get the processor replaced at Duet3d or it has to be done only in US?

If expert people are there at chip level replacement, shall I give it to them? WHere can I get the processor?

What will be the charges?

@3ddevil Thanks.. I am located in India. Actually, I am having DUET Wifi-01no and DUET 0.6-02nos burnt with us.

Is it possible to get the processor replaced?

What will be the charges?

Only the processor is hot. Other parts are normal. Is it possible to replace the processor? Please advice..

Hello everyone,

I was using a DUET wifi board. Everything was working very fine. Last night, unfortunately, the PLA cooling fan copper wires touch with each other (outer insulation got damaged due to some miswiring).

When it was printing, immediately it went to some odd movements. I stopped it and switched off the power. When I powered it again, some smoke came from the hot end side. Not sure from where it came.

I removed all the wires and connected the board to the PC, it is not detecting now. No COM port is coming. Wifi is not blinking. The processor is very hot now. Board is burnt?

Any solutions??

Bed heater LED was lighting up. I again removed the powe supply wires and bed wires from the board. Re-soldered it and re inserted the wires. When we tighten the wires, automatically the green connectors are askewing and the soldering become loose.

What should be the ideal tightness?

Because when I tight normally I fear of getting more loose. But, when I tighten it more, the screw terminal connector is moving.

I am using DUET 0.6 from Reprap ltd. Using 12V power supply. Recently due to some of my mistake, one of the board burnt (minor). Then I replaced with another DUET 0.6 board.

In that it was having issues with heating the heat bed. The soldering of the screw terminal was loose and one side soldering was totally removed. So, replaced with another screw terminal on the reverse side (Which was having good soldering contact. Image attached). After that bed was heating and printed successfully 2-3 prints.

Image link: https://imgur.com/a/oQkMq

One week later, now again the heat bed is not working. When giving the temperature, the terminals are not showing any Voltage. I checked for the tightness of the screws. Everything is ok. What will be the issues?

Thanks
Selvakumaran