Replacing Assemblies
To remove the system board
To remove the system board
1Remove the floppy drive.
2Using the T10 TORX driver, remove the six screws that hold the system board to the deck.
3Remove the two hex nuts and washers from the rear BNCs using the
The 54621D , 54622D, and 54624A have two rear BNCs, the 54621A and 54622A have one rear BNC.
4Using the T8 TORX driver, remove two screws from module connector and remove the rear RFI gasket.
5Remove the intensity knob and shaft by grasping the knob with one hand and the grasping the shaft behind the front panel with the other hand and pulling the shaft straight out from the front panel.
6Disconnect the three ribbon cables and the calibration cable.
Figure