Operator's Manual

Installation and Operator Handbook Operating Instructions
AMX-MA-00654 Issue 0.02 (USA)
5
ENSURE ALL POWER IS SWITCHED OFF BEFORE
ATTEMPTING TO WORK ON THE DRB-25..
1. Switch off all power to the DRB-25 and disconnect the Mains lead.
2. Disconnect and remove the Interface Module from the rear of the DRB-25 cabinet.
3. Disconnect and remove the antenna system RF cables from the rear of the DRB-25.
4. Remove the four Philips head screws securing the left-hand rear panel of the DRB-25.
5. Ease the panel out from the Cabinet, disconnect the two RF cables from the inside of the bulkhead
connectors on the panel, and carefully lay the panel aside.
6. Remove the four Philips head screws from the right-hand rear panel of the DRB-25.
7. Ease the panel out from the DRB-25 Cabinet, disconnect the two RF cables from the inside of the
bulkhead connectors on the panel, and carefully lay the panel aside.
8. Locate the 4-pin DC power connector on the backplane and disconnect.
9. Locate System Power Supply DC input power leads, trace these leads to the DC power distribution
terminal block located in the area behind the right hand rear panel of the cabinet and disconnect. Note the
connection points for reference during refitting.
10. Using a 9/32 inch (7 mm) hexagonal nut driver, remove the four Nyloc nuts securing the Power Supply
Module to the studs on the rear of the left-hand panel and remove the Power Supply Module.
11. Refitting is a reversal of the removal procedure.
4.4 OPERATIONAL FAULTFINDING
If, during operation, the DRB-25 should fail to operate as expected, observe the status indicators and displays
of the modules as described in Chapter 2. Press the RESET button of the Controller Module and the
Transceiver Module and re-evaluate the condition. If this fails to clear the problem, proceed with the
faultfinding detailed in Table 4-4.
Table 4-4 Faultfinding Chart for Operational Problems
Indication Probable Cause Recommended Action
FAULT lamp on Controller
Module lit and error code
displayed
Controller Module
failure
Note displayed error code on Controller Module:
see Appendix B for recommended action.
FAULT lamp on
Transceiver Module lit and
error code displayed
Transceiver Module
failure
Note displayed error code on Transceiver Module:
see Appendix B for recommended action.
PA FAULT lamp on
Transceiver Module lit and
error code displayed
PA Module failure Note displayed error code on Transceiver Module:
see Appendix B for recommended action.
DRB-25 fails to transmit
SWR Error E08
Antenna System failure Check antenna system for damage and ensure
correct connections.
Power Amplifier Module
failure
Switch power off, substitute known good Power
Amplifier Module and re-test.