Motorola ASTRO 25 GTR 8000 - Replacing a Duplexer (UHF); Figure 113: Duplexer Module (UHF)

b Using the T20 bit, secure the replacement duplexer to the tray using the screws removed in
step 5.
7 Re-install the duplexer tray in the rack as follows:
a Slide the tray in the front of the rack.
b Using a T30 bit, secure the tray to the rack with the two screws removed in step 4 b.
c Reconnect the Rx output, Tx input, Antenna output, and ground cables to the duplexer.
8 Set the rocker switch on the front of the power supply to the On (I) position.
9 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.
9.14
Replacing a Duplexer (UHF)
Figure 113: Duplexer Module (UHF)
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.
MN003286A01-E
Chapter 9: GTR 8000 Base Radio FRU Procedures
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