North Star DIMENSION Service Manual page 187

SUBASSEMBLY REMOVAL
Installing a New Bus Board
Introduction The bus board is more difficult to replace than other circuit
boards because its replacement involves more than a simple
reversal of the removal procedure. Follow the steps below,
and do not attempt to replace the board before reading the
entire procedure.
WARNING
Be sure all power is disconnected from the central
module before performing the procedure.
Procedure: Installing a New Bus Board
1. Be sure that all sheet metal plates are removed from the central
module rear panel.
2. Place the bus board so that the standoffs that fasten the front edge
of the bus board to the central board are aligned and gently press the
connector on the disk drive side of the board into the socket on the
central board. Press the board down over the standoffs to lock the
board in place.
3. Place the plastic spacer on the flat of the copper sheet metal ground
spring strip and align the holes.
DIMENSION Service Manual 4-21