Step 1: Hold up the riser and snap on the handle. Remove the eight screws of the lower case of the display on the riser, remove the six screws on the upper side of the left and right risers from the top to the bottom, then remove the upper and lower cases of the display, unplug the communication cable terminals connected to the display on the riser.
Step 2: Unplug the communication line terminal of the safety lock core and remove the safety lock core. Then put the new safety lock core on, and plug the communication cable of the safety lock core at the communication cable terminal of the display.
Step 3: Install the lower case of the display, tighten the second screw on the left, and then tighten the screws on the inside of the upper end of the left and right risers
Step 4: Insert the riser to connect the communication line terminal of the display, cover the upper case of the display meter, and then fix it with screws.