Specifications

DUPLEXER REMOVAL AND
REPLACEMENT
The following procedures should be followed to remove
and replace the duplexer.
1. Turn off the Unit and unplug the AC Cord.
2. Disconnect the TX and RX coaxial cables from the
rear panel.
3. Remove the 8 black Phillips head screws that fas-
ten the wrap to the chassis.
4. Remove the wrap by sliding it off towards the rear
of the Unit.
5. Remove the top cover, using a T9 TORX screw-
driver for the 16 screws that hold the cover in
place.
6. Remove the following cable connectors from the
Main Board Assembly:
a.
P401
, 2-conductor, black, white wires.
b.
P501
, 4-conductor, red brown orange. yellow
wires. This connector has a locking latch
which must be released before removal.
c.
P502
, 1 pin 1 with orange wire.
d.
P503
, 15-conductor; pin 1 with green wire.
e.
P504
, 1 pin 1 with green wire.
f.
P505
, 4-conductor; pin 1 with purple wire.
g.
P401
, miniature coax; at front of Main Board.
h.
P501
, miniature coax; at rear of Main Board.
7. Remove the 6 TORX (T9) screws that fasten the
Main Board Assembly in the chassis.
8. Carefully lift the Main Board Assembly out of the
chassis.
9. Remove the crossbrace (retaining bracket) by first
removing the 1 black Phillips screw from the chas-
sis’ side. Lift up the end of the brace that was held
in by the screw and remove the brace from the
chassis.
10. Disconnect the following coax cables:
a.
P401’s
miniature coax from rear panel’s lower
BNC connector labeled ANTENNA.
b. PA Module’s RG-58 coax from rear panel’s
upper BNC connector labeled TX ANTENNA.
11. Place the Duplexer on the chassis bottom with its
BNC connectors towards the rear panel.
12. Fasten the Duplexer to the chassis bottom, using
the two supplied 8-32 black Phillips screws and
kepnuts. The screw heads go on the outside bot-
tom.
13. Re-install the retaining bracket removed in Step 9.
Use the two holes in the center wall located to-
wards the front of Unit The sponge rubber pad on
the bracket should be down on the Duplexer.
14. Install the supplied RG-58 coax cable.
a. Connect one BNC end to the Duplexer’s cen-
ter port labeled ANTENNA.
b. Connect the other BNC end to the Unit’s
lower rear panel connector labeled AN-
TENNA.
15. Connect the PA Module’s RG-58 coax cable to the
Duplexer’s port labeled LOW PASS.
16. Connect the
P401’s
miniature coax cable BNC end
to the Duplexer’s port labeled HIGH PASS. Dress
the miniature coax cable over the Duplexer with its
P401
end near the Unit’s front panel.
17. Carefully position the Main Board Assembly back
on the mounting flanges (feet) located on the cen-
ter and right side walls. The proper orientation for
the Assembly is with the small heatsink and elec-
trolytic capacitor- area located next to the side
wall.
Typically, the TX frequency is lower than
the RX Frequency. Thus, the normal con-
nections to a Duplexer are: TX coax cable
to Low Pass Port; RX coax cable to High
Pass Port.
NOTE
AE/LZB 119 1882 R1B
32