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

Replacing the Right Front Panel Board

1. Place the Right Front Panel Board in position on the mounting bracket and line up the
screw holes.
Note: Verify that the rotary potentiometers and switch button caps are correctly
positioned through their openings in the front panel faceplate. Turn the rotary
potentiometers to be sure that they move freely; and push the switch button caps to be
sure that their corresponding switches click.
2. Install the three screws that secure the board to the mounting bracket.
3. Install the two screws that secure the front panel faceplate.
4. Connect the flat ribbon cable from the Connector Board to Right Front Panel Board,
location J601. Be sure to install the cable locking clip.
5. Connect the flat ribbon cable from the Left Front Panel Board to the Right Front Panel
Board, location J602.
Caution: The side walls of the picoflex header are different. The Pin 1 side is slightly
wider than the other side; and the corresponding sides of the connector incorporate the
differences. When you connect the cable, be sure to orient the marking (red or black) on
the cable that indicates the connection to Pin 1 on the board to prevent damage to the
header or a failure caused by an improper connection.
6. Follow the procedure on page 3-8 to install the Front Panel Assembly.

Removing the LCD Board

1. Remove the Front Panel Assembly, as described on page 3-8. It is not necessary to
disconnect all the cables that connect the Front Panel Assembly boards to boards located
on the bottom enclosure.
2. Disconnect the stranded wire cable soldered to the LCD Board from location J405 on the
Engine Board.
3. Remove the locking cable clip and disconnect the flat ribbon cable soldered to the LCD
Board from location J406 on the Engine Board. If the unit you are servicing has a PCX-1
Board installed, this cable is routed underneath the PCX-1 Board.
After you disconnect the cable, carefully slide it so that it is positioned close to the left
edge of the PCX-1 Board (left edge as viewed standing at the front panel). Gently pull the
cable toward the Front Panel Assembly to completely free it from underneath the PCX-1
Board.
4. It is not necessary to remove the front panel faceplate to remove the LCD Board. One
screw that secures the faceplate to the Front Panel Assembly is located above the LCD
Board. Refer to Figure 3-5 and remove the screw.
5. Remove the two screws that secure the LCD Board to the mounting bracket, and remove
the LCD.
PC2R Disassembly/Assembly
Front Panel Assembly
3-11