GT2560 V4.0 motherboard wiring diagram

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Joined: Sat Mar 21, 2020 6:04 am

Re: GT2560 V4.0 motherboard wiring diagram

Post by Mortega » Fri May 22, 2020 1:54 am

Hey @hardsmar yes I did make lots of progress in fact, and solved the issues. Sorry I just saw your message. I found out about all pins connected to the AVR mega by just opening up the printer, and going pin by pin with a multimeter, and changing everything on the Marlin code.

What do you need, where are you stuck? I am happy to help.

On my post here, I explain how I solved this error: viewtopic.php?f=120&t=70170&start=10
However, I had a few more along the way, but now everything is fine.

Posts: 3
Joined: Wed Jul 08, 2020 9:03 am

Re: GT2560 V4.0 motherboard wiring diagram

Post by Ydt175 » Wed Jul 08, 2020 9:14 am

I think we still need a wiring diagram for not only this gt2560 v4.0 board I currently have here infront of me, and the extruded expansion card that I’ve seen people refer to as the v 3.1 or 4.0. Long story short I bought a new geeetech a10 and got about 60-80 hours of print time into it then decided to upgrade to marlin 1.1.9 so I could only upgrade the steppers to tmc 2208’s and not buy anything else.... well I somehow made the board stop communicating with my laptop and I went with an SKR 1.4 turbo 32 bit upgrade. Well I fried a portion of the turbo board from not knowing how this extruder expansion slot AND this motherboard are wired because the back side of the board is labeled with just a few letters and no real user manual to explain what that pin does.

This is like an engine swap, I’m the mechanic and I’ve got all the tools and knowledge right here to make things work, I just need you to release your Haynes manual so I can get back to using this geeetech a10 in 32 bit.

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Joined: Wed Jul 08, 2020 9:03 am

Re: GT2560 V4.0 motherboard wiring diagram

Post by Ydt175 » Wed Jul 08, 2020 9:25 am

Now with these photos attached, let’s look at the situation, I’m gonna send my old gt2560 v4.0 to my teen nephew so he can make his first 3d printer from scratch. I’m gonna need not only a key of this plug for me to fix my printer, but he’s going to need the key as well to start his journey of learning. Can you help me with a proper wiring diagram? I just thought we would’ve had this by now with how old this new version 4.0 is and the new extruder adapter plate.
B0C7E09C-B571-4063-8667-56C7AAF53B2B.jpeg (393.11 KiB) Viewed 484 times
12D41CCF-7B72-4EA1-B86B-9FAA0E8F90DC.jpeg (641.31 KiB) Viewed 484 times

Posts: 3
Joined: Wed Jul 08, 2020 9:03 am

Re: GT2560 V4.0 motherboard wiring diagram

Post by Ydt175 » Sun Jul 12, 2020 5:25 am

Okay I’ve got an update, I still need geeetech to release what pins do what on the extruder plug. I’ve connected almost everything and here’s my current views. It’s weird that for my thermistor to work, all I needed was a single thin white wire to go back to my signal. Odd. So this other thin black wire must just be like a secondary thermistor for the same hot end is my guess?...

The actual problem, why when I use the ground wire to the hot end fan, the fan goes from 50% speed up to 100% speed, that’s okay, so I plugged that into the same port as turning on the power to my hot end, problem is now when I turn the machine on, the hot end gets hot. I only let it go up to 40 celcsius before I was like, no that’s definitely not right and shut the machine off to wait for a reply here. Well I can just unplug that one wire and try to run it except problem #2

Problem #2 I have no idea how to get the part cooling fan to turn on, no idea which pins or wires it is. Cannot start printing without this.

Just to recap what’s going I just want to know what pins are for the part cooling fan, if you can supply me with this info I would be very happy and could post info to help people do what I’m doing including replacing my old posts with just the answers people need to know. Thank you

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Joined: Thu Jul 23, 2020 2:26 pm

Re: GT2560 V4.0 motherboard wiring diagram

Post by Haemmma » Thu Jul 23, 2020 2:29 pm

Hi yes would like to get hands on a full schematic / wiring diagram for the V4 also.

I'm interested in installing a MMU2 on the A10, but would need to know where the serial pins go with upgrade to Marlin 2.0.

Thanks in advance

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