Motorola 68230 - Vanguard 300 DSU/CSU, Operator'S Manual, Page: 74 / 79

Steps to Add or Replace an ISDN Daughtercard
Follow these steps:
Step Action
1
Unplug the power cord from the primary power source and remove
interface cables and power cables.
2
Remove the top cover and front panel of the Vanguard (see Figure 4-4.)
3
Check the serial number on the surface of the daughtercard, and on the
surface of the motherboard to verify compatibility (see the "ISDN
Daughtercard Compatibility" table, above, to check compliance.)
4
Remove the daughtercard mounting screw that attaches the daughtercard
to the board.
5
Unscrew the two rear panel coverplate screws. Unplug the existing
daughtercard.
6
If you are adding a daughtercard rather than replacing it, connect the 68-
pin interface header onto the motherboard, as shown in Figure 4-18.
7
To replace the daughtercard, align the standoff on the motherboard with
the hole on the new daughtercard as shown in Figure 4-18.
8
Push the daughtercard down onto the connector, being careful to align
pins.
9
Fasten the screw that attaches the daughtercard to the motherboard, then
fasten the two rear panel coverplate screws. The daughtercard is replaced.
10
Replace the top cover and front panel, snapping them together.
11
Reinstall the front door.
12
Reconnect the interface cables and power cables; power on the unit.