Pay attention to the position of the spring so that it can be put back later.

Look at pictures four and five.

2) As shown in Figures 6 and 7 (uncut) and Figures 8 and 9 (cut), drill a shallow hole on both sides of the ink cartridge.

3) Push out the nail lock with a jeweler's screwdriver. Push the screwdriver into the hole at this position and the nail lock will be pushed out. Remove the locking nail.