Ryobi BTS20 Operator's Manual page 19

Blade alignment with the riving knife can be adjusted for
different blade thickness. Refer to Settings and
Adjustments in the Operations Section. Before continuing,
read To Check, Replace or Adjust the Blade Guard
Assembly on page 23 to make sure of proper riving knife
alignment.
THROAT PLATE
ASSEMBLY
Check the blade guard assembly for clearances and free
movement. Lower the blade, reinstall the throat plate into
the opening, and secure the attachment screw. Tighten
the screw securely.
REPLACING THE THROAT PLATE
Page 19
Fig. 17