Nautel XR6, Troubleshooting Manual, Page: 40 / 291

XR6/XR3 Troubleshooting Manual Responding to alarms
Page 1-20 Issue 3.0 2009-07-15
Removing and reinstalling RF power modules
Removing an RF power module
Refer to Figure 1.4 on page 1-21 , and Figure 1.5 on page 1-23 for this procedure.
1. An RF power module must be inhibited prior to its removal from the transmitter.
Press and then release the module’s
INHIBIT
switch on the bottom of the module’s front
panel.
• Make sure that the module’s
INHIBIT/TEMP
alarm LED at the top of the module’s front
panel turns on.
2. Disconnect the cable from J1 at the bottom of the module’s front panel. You should hear a
relay in the rear of the transmitter drop out (turn off). If the module is a spare module that
was not selected for operation, no relay dropout will be heard.
3. Remove both mounting screws from the top of the module’s front panel.
4. Remove the mounting screw behind J1 at bottom of the module’s front panel.
5. If the packing bolt at the rear of the module has not already been removed, press
RF Off
,
switch off ac power, remove the upper transmitter cover, then remove the packing bolt.
Make sure to replace the cover before restoring ac power and
RF On
status.
6. Grasp the handle on the front of the module, carefully pull the module forward, and grasp
the cutout in the top of the module’s rear panel. Carefully lift the module out of the
transmitter.
NOTE:
The RF power module will shut down when the
RF FAIL
or
INHIBIT/TEMP
alarms are
registered on its front panel.
WARNING:
The RF power module weighs approximately 20 kg (42 lbs.). Use care
when lifting the module.