Removing the Bass Contact Board
1. Disconnect the small ribbon cable that connects the Bass and Treble Contact Boards.
2. Remove the screws that secure the four stiffening brackets (three screws per bracket) to the
Bass Contact Board and remove the brackets.
3. Remove the remaining 18 screws that secure the board to the keyboard chassis, and
remove the Bass Contact Board.
Replacing the Bass Contact Board
1. Position the Bass Contact Board on the keyboard chassis. Be sure that the rubber key
contacts line up properly through the holes in the keyboard chassis.
2. Install the 18 screws that secure the board to the keyboard chassis.
3. Position a stiffening bracket over the board and install the three screws to secure it to the
keyboard chassis. Repeat for the other three brackets.
4. Connect the small ribbon cable that connects the Bass to the Treble Contact Board.
Connecting the Keyboard Contact Boards
1. Turn the keyboard over to its normal playing position.
2. Tilt the keyboard up (front of the keys facing down), and connect the at ribbon cables that
connect the Treble and Bass Contact Boards to the Interface Board. Be sure to reapply the
tape to secure the connectors. Lower the keyboard.
Removing the Keyboard Contact Strips
1. Place the keyboard upside down on a at soft surface. Be sure that the keys are resting on a
soft surface to avoid scratching or other damage.
2. Follow the procedure to remove the Bass and Treble Keyboard Contact Boards.
3. Examine the keyboard contact strips and look at the design of an individual contact. The
top portion of the contact has two indentations. One indentation is deeper than the other.
When replacing the keyboard contact strips, the deeper indentation is always positioned
toward the rear of the key.
4. The keyboard contact strips have mounting pegs that secure the contact strips to the
keyboard contact boards.
5. To remove a keyboard contact strip, gently lift and free the strip from its position. Be
careful not to rip or damage any contact in the process.
Disassembly/Assembly
Keyboard Assembly
4-20
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