(1) Turn off the main power switch and unplug the main power cord of the backplate;
(2) The fuse box is in the main power socket of the backplate.There is a concave parts on both sides of the fuse box. Pull the lock pin to the middle with a small taper, and the fuse box will pop out and pull out;
(3) Remove the fuse from the fuse box and replace it;
(4) Insert the fuse box and push hard to lock the two locking pins.
