Nautel NX15, Руководство по устранению неисправностей

Страница: 53 / 274

NX25/NX15 Troubleshooting Manual Responding to alarms
Issue 5.0 2016-05-06 Page 1-45
Removing and reinstalling RF power modules
Removing an RF power module
1. Confirm the location of the RF power module that is being removed. Note the alarm text
includes a Module serial address that is also identified on the front panel of each RF power
module. See
Figure 1.3 on page 1-47 to determine the location for a given RF power module
(A15 through A24).
2. If possible, turn off the transmitter before removing an RF power module. If you need to
remove a module while “on air”, disable the RF power module to be removed using the AUI.
From the Meters page, click on the Rack information (i) button. The Power Module status
screen (see
Figure 1.2 on page 1-46 ) should appear. Click on the associated RF power
module’s Front Panel Inhibit icon. The icon colour should change from green to red,
indicating the RF power module is disabled.
3. After the RF power module is disabled, you should hear a relay in the back of the cabinet
drop out (de-energize). If you do not hear the relay de-energize (click),
DO NOT
CONTINUE
to Step 4 . Try re-enabling and disabling a few times while trying to hear the
relay de-energize. If you do not hear the sound,
DO NOT
remove the RF power module
while the transmitter is on-air.
4. Disconnect the RJ45 cable from the front of the RF power module. If the module was not
disabled in Step 2 , you should now hear a relay in the back of the cabinet drop out (de-
energize)
5. Remove both mounting screws from the RF power module’s front panel.
6. Grasp the handle on the front of the RF power module and carefully pull the RF power
module out of the transmitter.