98 Replacing Modules TB8100 Installation and Operation Manual
© Tait Electronics Limited June 2005
6.9 Replacing the Subrack Interconnect Board
There are two types of subrack interconnect board available, as described in
the following table.
Figure 6.2 on page 99 shows the two types of board, and “Switch Settings”
on page 100 explains the settings for the switches on the dual base station
board.
Removal 1. If you have not already done so, carry out the instructions in
“Preliminary Disassembly” on page 88, and remove the control
panel, as described in “Replacing the Control Panel” on page 89.
2. Disconnect any system control bus cables.
3. Remove the M3 nuts and spring washers
b securing the
interconnect board to the subrack, as shown in Figure 6.2.
4. Remove the board. If you are changing the type of board, also
remove the insulator
c.
Refitting 1. If previously removed, replace the insulator. If you are changing the
type of board, you must fit the matching insulator.
2. Refit the board and secure with the M3 nuts and spring washers.
3. If you have fitted a dual base station interconnect board, set the
switches of S1
d as described in “Switch Settings” on page 100.
4. Reconnect the system control bus cables as shown in Figure 6.2.
Note The system control bus connections shown in Figure 6.2 apply to
all single and dual base station systems.
Interconnect Board Description
single base station for single base stations with PMU
dual base station
■ for dual base stations with PMU
■ for single and dual base stations with 12V PA
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