Kurzweil SP5-8, Руководство по обслуживанию, Страница: 50 / 76

Bottom Enclosure
Keyboard Contact PCBs
4-20
Caution: If you need to reposition the PCB, be careful you do not dislodge or damage the
keyboard contacts.
d. Install the ten screws to secure the Mid Contact PCB to the keyboard chassis. While
doing so, include the small flat plate that connects the Lo and Mid Contact PCBs.
Install the screw to secure the small flat plate on the Lo Contact PCB.
3. Insert the flat flex cable from the Lo Contact PCB into the connector on the Mid Contact
PCB.
4. Connect the flat ribbon cables; Bass (J6) and Treble (J7). Be sure to reapply the tape to
secure the ribbon cable(s).
Note: The Bass flat ribbon cable is longer.
Removing the Hi Contact PCB
1. Disconnect the flat flex cable that connects the Mid and Hi Contact PCBs. Gently tug on
the flat flex cable to disconnect it.
2. Remove the eight screws that secure the Hi Contact PCB to the keyboard chassis.
3. Carefully lift and remove the Hi Contact PCB.
Replacing the Hi Contact PCB
1. Position the Hi Contact PCB over the keyboard chassis. The flat flex cable connector and
the keyboard diodes should be positioned closest to the back of the keyboard chassis.
2. Refer to Figure 4-21. In addition to the eight screws that secure the Hi Contact PCB to
the keyboard chassis, there are tabs and alignment posts on the keyboard chassis that
help secure and correctly position the Hi Contact PCB.
a. Angle the PCB so that its front edge is positioned under the tabs and align the screw
holes in the PCB over their location on the keyboard chassis.
b. Apply slight pressure to the back end of the Hi Contact PCB. Doing so, lowers the
PCB so that it is laying flat on the keyboard chassis.
c. Make sure the alignment posts are positioned through the holes provided for them
on the Hi Contact PCB.
Caution: If you need to reposition the PCB, be careful you do not dislodge or damage the
keyboard contacts.
3. Install the eight screws to secure the Hi Contact PCB to the keyboard chassis.
4. Insert the flat flex cable from the Mid Contact PCB into the connector on the Hi Contact
PCB.