BLT421S Product Manual
18
A.3 Replace the lower protective window
1. Loosen the screws of the drawer door;
2. Pull out the lower protective mirror drawer;
3. Close the protective door of the lower protective mirror drawer to prevent dust
from entering;
4. Remove the pressure ring on the protective window;
5. Replace the lower protective window;
6. Open the protective door of the lower protective mirror drawer;
7. Insert the lower protective mirror drawer with window into the inside of the
cutting head.