Nautel GV60, Troubleshooting Manual

Page: 52 / 477

GV60 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
PAGE 4.1.44 VERSION 1.0 2018-01-01
RF Power Module Replacement
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
number (1-24) that is not identified on the RF power module. See Figure 4.1.13 on page
4.1.45 to determine the location for a given RF power module (1-24).
2. Open the transmitter’s front door.
3. Set the
ENABLE/DISABLE
switch on the front of the suspect RF power module to its
DISABLE
(down) position. This inhibits the module’s associated pair of power supply modules.
4. Remove and retain the two M5 securing screws in the front of the module. If necessary, remove the
M8 shipping screw in the back of the module (the shipping screws do not need to be reinstalled,
and may have already been removed during installation or previous maintenance).
5. Grasp the handle on the front of the RF power module and carefully pull the RF power module out
of the transmitter, noting that there are catches on the transmitter tray that will prevent the rear of
the RF power module from being fully extracted. When the module reaches these catches, lift the
rear of the module over the catches by tilting the module’s front down and then lift by the rear
handle. The module weighs 14.5 kg (32 lbs).
Installing an RF Power Module
1. Grasp the front and rear handles on the RF power module and insert it into the transmitter,
ensuring that the rear of the module clears the catches in the transmitter tray.
2. Carefully push the RF power module into place so that its edge-card connector mates with the
transmitter.
3. Install both M5 securing screws in the RF power module’s front panel.
4. Set the
ENABLE/DISABLE
switch on the front of the RF power module to its
ENABLE
position (see
Figure 4.1.13 on page 4.1.45 ). This activates the module and its two associated power supplies.
5. With RF off and the system interlock circuit intact (closed), use the controller’s front panel UI to
initiate a
Xmtr PA Bias
routine (see
Main Menu
->
System Settings -> Factory Settings ->
Calibration
; refer to the Operations and Maintenance Manual for more detail).
6. Close the front door.
WARNING! Fans with rotating blades are present at the bottom of the RF
power module. Take care when removing the module.