Casio YM-81 User Manual page 12

2. Install the adjuster unit onto the arm unit.
1.
Remove the bracket from the adjuster unit.
 The adjuster unit is packed with the bracket attached. Remove the bracket as shown in the
illustration.
Adjuster unit
2.
Loosen the arm unit hex head screw indicated in the illustration and then pull out
the inner arm. Next, orient the adjuster unit as shown in the illustration and insert it
into the inner arm.
Adjuster unit
Installing the Wall Mount Bracket
Arm unit
Hex head screw
Inner arm
EN-11
Bracket (with projector anchor plate)
Outer arm