Figure 5-2. Power Supply, Module LED Indicators.
(3) On the power amplifier (PA) place the
Testing and Fault Isolation
MONITOR switch to the appropriate range position and
observe the MONITOR meter for an indication of correct
The following procedures are based upon observation of
operating power. Use the upper watts range scale (black
an indication. Each procedure is based on the kind of
fault indicated and it is not necessary to perform other
procedures unless an applicable fault indication has
The range position (X1, X10, X100) to
Power Amplifier FAULT Indication (Signifying
be used will depend on the operating
low power output).
power as follows:
(1) On the power supply, check that the
Up to 15 watts-X1
FAULT lamp or the STATUS display WG/ANTENNA
15 to 150 watts-X10
INHIBIT lamp is not illuminated and that there is no
Over 150 watts-X100
blown fuse indication.
(2) Check that no fault (FAULT lamp
(4) If the indication in step (3) above is
illuminated) is indicated on the upconverter,
correct, the problem is in the power amplifier RF low
amplifier/mixer and/or modem.
power alarm module A1; remove and replace the module