Casio YM-81 User Manual page 15

Installing the Wall Mount Bracket
3. Install the arm unit on the wall anchor plates.
1.
Insert the M10×152mm arm vertical adjustment screw into the hole of the arm unit.
 Align the red mark of the adjustment screw as shown in the illustration.
2.
Temporarily hook the arm unit onto the two screws of the middle wall anchor plate.
You do not need to tighten the screws.
Inner arm
Important! Important! Important!
 Note that if the hex head screw of the arm unit is loose, the inner arm will tend to move too
easily.
Red mark
Arm unit
Slide the groove of the hex head end of the arm
vertical adjustment screw into the U-slot of the
middle wall anchor plate.
EN-14
Arm unit
Arm vertical adjustment screw
Groove
Middle wall anchor plate
U-slot
Hex head screw
Temporary mounting screws