Replacing An Antenna Relay - Motorola ASTRO 25 GTR 8000 Manual

MN003286A01-E
Chapter 9: GTR 8000 Base Radio FRU Procedures
a Label and disconnect the Rx output, Tx input, antenna output, and ground cables from the
duplexer.
b Using a T20 bit, remove the four screws which secure the duplexer to the rack.
5 Install the duplexer to the rack as follows:
a Using a T20 bit, secure the duplexer to the rack using the four screws removed in step
b.
b Reconnect the Rx output, Tx input, antenna output, and ground cables from the duplexer.
6 Set the rocker switch on the front of the power supply to the On (I) position.
7 Place the base radio in Normal Mode, as follows:
a From the menu, select Service → Test and Measurement Screen.
b Click Change to Normal Mode.
c At the confirmation screen, click OK.
The base radio halts activity in the current mode and switches operation to the requested
mode.
9.16

Replacing an Antenna Relay

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 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 antenna relay from the base radio, as follows:
a Mark all cables and remove. RX (NC) position, TX (NO) position, Antenna (C) connection
position, and power connection position.
262
140.
step 4
Connecting Through