This procedure explains how to replace a stepper driver.


1. Unscrew the Internal Cover



2. Put the printer on its back and unscrew the base plate 


To do so, unscrew the 6 phillips screws (front of the printer) and the 4 allen screws (back of the printer):




 


and place the base plate as indicated on the picture below 



3. Disconnect the power button connector from its connector on the base plate



then remove all the cables from the controller board (on the right side of the printer)



4. Remove the daughter board pulling it gently on both sides






5. Remove the 3 screws of the zimboard (make sure not to unscrew the white spacers below the zimboard at the same time) 

                                                                 



6. Unplug the fan wire pushing whith a pointed tool as shown below 



7. Now that the zimboard is free, you can replace the stepper driver according to the picture below.





7. Reassemble the zimboard following the same steps in reverse order. Insert the cables as indicated below ( Note : the right cartridhe holder cables go on the left connector (E1) and vice versa.