Replacing GT2560 A+

[IulianM]

Hi,

I own an i3 Pro B printer. At a certain point I shut it off in the evening and very next day did not start at all.
I bought a new GT2560 rev A+ board (identical with the original one).
To upload the firmware I have used the Firmware Toolkit For Geeetech Printer to up-load I3proB_G02_V1.0.04_01.hex.
The display was looking ok. But trying to home the extruder nothing happens. In fact besides the correct information display the printer does nothing.
Then I was thinking to up-grade it to dual extruder so I have changed the PSU, I have added a driver and loaded the I3proC firmware. Nothing again.

I really do not know how to start debugging it. The only idea I have is to change all motor drivers. Do you have any suggestion what should I check and where can I start?

Thank you!

[William]

I think you should check the PSU output voltage at first.
Then check the fuse of the motherboard.
Try to use the multimeter check it.

[IulianM]

Hi,

I have checked the PSU and I get 12V.
The fuses look ok (measured for continuity).

Anything else I can check?

Thank you!

[William]

Do you mean the extruder won't work?
You should heating it to 180C or more then control it move.
It won't move until the temp of it lower than 170C.

[William]

If the all the motor won't move then you should check the endstop wires at first.

[IulianM]

Hi,

I was re-taking yesterday all the measurements. It looks something is bad with either the PSU or with the board. After couple of power-on/power off one of the fuses get burned (the same one). I was trying to connect one by one each connector, powering on and check the fuse; I burned like 10 fuses but still not able to say what is causing this.

Any idea or suggestion?

Thank you!

[William]

I think you should check the A4988 at first.
Try to remove all of it off then check it again

[William]

I have changed the driver and the hotend move !!! =)
I have reverse the LCD and SD cable and my screen work !
Now the printer is not calibrate ... For the X Y axis.

Hi, You can check the tightness of your belt;
Check your driver board voltage (0.8-1.2V).