Removing The Lcd Board; Replacing The Lcd Board; Removing The Polyphony Expansion Board (Pcx-1) - Kurzweil PC2 Series Service Manual

Removing the LCD Board

1. Follow the procedure described on page 4-8 to remove the right enclosure support wall.
2. Disconnect the stranded wire from location J405 on the Engine Board.
3. Remove the cable locking clip and disconnect the flat ribbon cable from J406 on the Engine
Board. Be sure to set the cable locking clip safely aside so that you can install it when you
reconnect the cable.
4. Removing the LCD Board requires cutting the tie wraps that bundle the LCD cables to
cable mounts positioned along the rear panel. Cut the tie wraps at the cable mounts that
the two LCD cables pass through.
5. Remove the four screws that secure the LCD to the front panel bezel.
6. Lift the LCD Board up and remove it.
Caution: Be sure that the LCD cables are not tangled with other cables routed along the
rear panel.

Replacing the LCD Board

1. Place the LCD Board in position face down onto the front panel bezel.
2. Install the four screws that secure it to the front panel bezel.
3. Connect the stranded wire cable to J405 on the Engine Board.
4. Connect the flat ribbon cable to J406 on the Engine Board. Be sure to install the cable
locking clip.
5. Position the LCD cables at the cable mounts on the rear panel and install new tie wraps
through the cable mounts to bundle the cables.
Caution: Be sure that you have bundled the LCD cables with the other cables positioned
at the cable mounts.
6. Follow the procedure on page 4-8 to install the right enclosure support wall.

Removing the Polyphony Expansion Board (PCX-1)

The Polyphony Expansion Board is mounted on to the Engine Board and held in place with four
nylon PC board standoffs and a 24-pin female header on the underside of the board.
1. Follow the procedure described on page 4-8 to remove the left enclosure support wall.
2. Squeeze the top of one of the four nylon PC board standoffs, and lift the corner of the
board until it clears that standoff. Repeat for the other three standoffs.
3. When the board is free of the standoffs, lift the board straight up to disconnect the 24-pin
connector from the Engine Board.
PC2/PC2X Disassembly/Assembly
Top Enclosure
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