Figure 112: Duplexer Module (700/800 Mhz) - Motorola ASTRO 25 GTR 8000 Manual

MN003286A01-E
Chapter 9: GTR 8000 Base Radio FRU Procedures

Figure 112: Duplexer Module (700/800 MHz)

WARNING: Shock hazard. The GTR 8000 Base Radio contains dangerous voltages which can
cause electrical shock to personnel or damage to equipment. Set the power supply switches for
the affected equipment to the Off (O) position when servicing this component in the base radio.
IMPORTANT: Powering down the base radio causes any affiliated subscribers to relocate to
another channel at the site or another channel at an adjacent site. Place the base radio in
Service Mode before powering down so that the system does not attribute the loss of channel to
a failure. Placing a base radio in Service Mode is performed using either the Unified Event
Manager (UEM) or Configuration/Service Software (CSS).
Procedure:
1 Wear an Electrostatic Discharge (ESD) wrist strap and connect its cable to a verified good
ground.
CAUTION: Wear the ESD strap throughout this procedure to prevent ESD damage to
any components.
2 Place the base radio with the duplexer module being replaced in Service Mode, as follows:
a Connect to the device modules Ethernet service port using CSS. See
an Ethernet Port Link on page
b From the menu, select Service → Test and Measurement Screen.
c Click Change to Service Mode.
d At the confirmation screen, click OK.
The base radio halts activity in the current mode and switches operation to the requested
mode.
3 Set the rocker switch on the front of the power supply to the Off (O) position.
4 Remove the duplexer tray from the rack as follows:
a Label and disconnect the Rx output, Tx input, antenna output, and ground cables from the
duplexer.
b Using a T30 bit, remove the two screws which secure the tray to the rack.
c Slide the tray out the front of the rack.
5 Using a T20 bit, remove the duplexer from the tray by removing the screws that attach it to the
tray.
6 Install the new duplexer in the tray, as follows:
a Place the new duplexer in the tray in the same location and orientation as the module that
you removed.
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