NV5LT/NV3.5LT TROUBLESHOOTING MANUAL
RESPONDING TO ALARMS
PAGE 4.1.40
VERSION 3.3 2016-03-10
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 (1-2) that is not identified on the RF power module. See
to determine the location for a given RF power module (1 - 2).
2.
Remove the front filter panel by loosening its eight (8) quarter-turn fasteners (see
) and lifting it out of its two bottom slots.
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
). This activates the RF power module and its two associated power
supplies.
5.
Install the front filter panel by positioning it in its two bottom slots and tightening its eight (8)
quarter-turn fasteners (see
).
WARNING! Fans with rotating blades are present at the bottom of the RF
power module. Take care when removing the module.
Summary of Contents for NV3.5LT
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Page 8: ...NV5LT NV3 5LT TROUBLESHOOTING MANUAL PAGE 4 VIII VERSION 3 3 2016 03 10 ...
Page 294: ...VERSION 3 3 2016 03 10 SD 32 Figure SD 32 NAFP109B Output Power Probe and Sample PWBs ...
Page 307: ...VERSION 3 3 2016 03 10 MD 8 Figure MD 8 NAPA31C Power Amplifier PWB Q1 ...
Page 322: ...NV5LT NV3 5LT TROUBLESHOOTING MANUAL LIST OF TERMS PAGE 4 6 2 VERSION 3 3 2016 03 10 ...
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