MDS 05-3628A01, Rev. B
MDS 4790M (MPT 1411) I/O Guide
69
Removing the Internal
Duplexer
To remove the internal duplexer, follow these steps:
1. Disconnect the cables from the back of the duplexer as shown in
Figure 32.
Figure 32. Internal Duplexer Cabling
NOTE:
A number of different duplexers can be installed in the radio. While
the physical appearance of the duplexer may vary slightly, its oper-
ation and removal remain the same.
2. Remove the four screws that mount the duplexer to the chassis as shown in
Figure 33.
3. Carefully lift the duplexer out of the chassis.
Use care when removing the duplexer. It is fragile and can be easily damaged
which can cause de-tuning.
Figure 33. Internal Duplexer Removal
Duplexer
TX Transmit
Antennna
RX Receive
Vertical Interface
Board
CAUTION
POSSIBLE
EQUIPMENT
DAMAGE
Duplexer
