Kurzweil PC2 Series, Руководство по обслуживанию

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4-14
PC2/PC2X Disassembly/Assembly
Top Enclosure
Replacing the Polyphony Expansion Board (PCX-1)
1. Place the PCX-1 Board over the four standoffs. This should properly position the 24-pin
connector over the 24-pin header on the Engine Board.
2. Press the PCX-1 Board down, securing the 24-pin connector, and snapping the board onto
the standoffs.
Note : If you are installing a new PCX-1 Board, check the old board for Sound ROM
options. If the unit has Sound ROM options, be sure to install them on the new board.
3. Follow the procedure described on page 4-8 to install the left enclosure support wall.
Removing the Slider Board
1. Follow the procedure described on page 4-8 to remove the left enclosure support wall.
2. If the unit you are servicing has a PCX-1 Board installed, follow the procedure on
page 4-13 to remove it.
3. The
fl
at ribbon cables connected to J101 and J102 use wire trap connectors. The shielding
has been removed from the end of these cables to expose the wires. The wires are inserted
directly into these connectors.
Lift up the sides of each connector. This unlocks the trap to free the cable wires. Gently
pull each cable up out of the connector. Note the marking (red or black) on each cable that
indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to
Pin 1 when you replace the Slider Board.
4. Two of the screws that secure the left enclosure support wall also secure the front panel
edge of the Slider Board. You have already removed the enclosure support wall, but one
screw remains securing this edge of the board. See Figure 4-9, and remove the remaining
screw.
Figure 4-9 Slider Board, screw locations
5. Remove the two screws that secure the PC board clamp and rear panel edge of the Slider
Board to the top enclosure.
6. Remove the Slider Board. The slider knobs, slider bezels, and switch button caps should
remain in place.
PC board clamp and screws
Front panel edge screw
J101
J102