kone pcb problem km KM713720G11

SORRY I HAVE A KONE ELEVATOR WHERE THE CAB BUTTONS HAVE BEEN DISCONNECTED AND THE WIRES ARE ALL CUT. ALL CONNECTIONS, BUTTONS, LIGHTS, DISPLAYS MUST BE REPAIRED. I WAS LOOKING FOR THE SCHEME TO BE SURE I WON'T WRONG. SOMEONE HAS THE CONNECTION DIAGRAM OF THIS BOARD TO HELP ME.
MY EMAIL: paolodangelo76@gmail.com