CANOGA PERKINS 2270 Fiber Optic Modem - Manual (Page 48)

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Canoga Perkins
3.11 Interface Reconfiguration
Figure 3-14 shows how the interface circuit board fits into the larger main modem board opening.
A header-type connector is provided to connect the two circuit boards together. The interface
board may be removed by loosening the two retaining screws and nuts, then pulling the board
outward from its connector.
Once a replacement board is in position, the two flanged lock nuts and bolts are secured with
built-in flat washers above and below the board junctures. It may be desirable to select a new data
rate at this time using the front panel switch.
Figure 3-14.
Inteface Card
Installation
3.12 Standalone Reconfiguration
To access the circuit board on a standalone unit, the enclosure cover must first be removed by
loosening the six screws on the sides of the unit. Next, unplug the power supply connector from
the PC board, and remove the two screws holding the rear panel in place.
The entire circuit board may now be removed by loosening the eight mounting screws. The inter-
face board may now be changed as outlined in Section 3.11, "Interface Reconfiguration."
The rear panel supplied with the new interface must also be exchanged with the original rear panel.
Simply slip the power cord strain relief grommet out of its mounting slot and fit it to the new rear
panel. The unit may then be assembled in the reverse order of the disassembly.