Replacing The Lcd Board; Removing The Left Front Panel Board - Kurzweil PC2 Series Service Manual

PC2R Disassembly/Assembly
Front Panel Assembly

Replacing the LCD Board

1. Place the LCD Board in position over the mounting standoffs on the mounting bracket.
2. Install the two screws that secure the LCD Board to the mounting bracket.
3. Install the screw that secures the front panel faceplate to the Front Panel Assembly.
4. Connect the stranded wire cable from the LCD Board to location J405 on the Engine
5. If the unit you are servicing has a PCX-1 Board installed, route the flat ribbon cable
6. Follow the procedure on page 3-8 to install the Front Panel Assembly.

Removing the Left Front Panel Board

1. Remove the Front Panel Assembly, as described on page 3-8. It is not necessary to
2. Disconnect the flat ribbon cable from J603. This cable uses a picoflex molex connector. To
3. It is not necessary to remove the front panel faceplate to remove the Left Front Panel
4. Remove the two screws that secure the Left Front Panel Board to the mounting bracket.
5. Refer to Figure 3-6. This illustration shows the location of a soldered connection between
3-12
Board.
beneath the board and connect it to location J406 on the Engine Board. Be sure to install
the cable locking clip.
disconnect all the cables that connect the Front Panel Assembly boards to boards located
on the bottom enclosure.
disconnect it, grip the connector and pull it out straight.
Caution: Do not wiggle the connector back and forth. Doing so, could cause damage to
the header.
Note: Be aware of the marking (red or black) on the 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
board.
Board. One screw that secures the front panel faceplate to the Front Panel Assembly is
located above the Left Front Panel Board. Refer to Figure 3-5 and remove the screw.
the Left Front Panel and Headphone/Volume/Power Switch Boards. To remove the
board, desolder this connection from the Left Front Panel Board.
Note: This illustration shows the Headphone/Volume/Power Switch Board lying flat to
indicate the connection between it and the Left Front Panel Board. In its normal position,
it is perpendicular to the Left Front Panel Board.