3.4 Exciter Operation
3.4.1 Controls and Indicators
Refer to Figure 3-23 for the location of controls and indicators
associated with day-to-day standard operation of the HX-1V
exciter. The function of each control and indicator is listed in
Table 3-4.
3.5 PA Cabinets
3.5.1 Circuit Breakers
Circuit breakers are located behind the lower panel of each
amplifier cabinet.
CB-1: Logic breaker
CB-2: Fan breaker
3.5.2
Slave Controller
The slave controller is located in the upper left corner of each PA
cabinet.
Refer to Figure 3-24.
3.5.2.1 Green Bar LED
Indicates AC power present to cabinet and controller, and +12 V
supply is operating.
3.5.2.2 Red Bar LED
Summary fault indicator is illuminated when any one or more of
the slave controller faults in sensed. Opening the front panel
reveals LED indicators for the various types of faults.
3.5.2.3 Door Open
Rear cabinet door is open or SCR crowbar is firing.
3.5.2.4 Air Loss
Fan is not running, or air pressure is below the threshold of the
air pressure sensing switch.
3.5.2.5 PS-1 Fault
The power supply controller for 50 volt supply PS-1 has sensed
a fault within the supply.
3.5.2.6 PS-2 Fault
The power supply controller for 50 volt supply PS-2 has sensed
a fault within the supply.
3.5.2.7 Cabinet Select
In transmitters with multiple amplifier cabinets, this LED should
blink indicating the monitor board has accessed the slavecontrol-
ler for data. In transmitters with only a single amplifier cabinet,
the monitor board only monitors one slave controller; it does so
continuously, and the LED should remain lighted continuously.
3.5.2.8 Cabinet ON Switch
This is a local ON switch for emergency and troubleshooting
purposes. A local ON command is not possible while the control
cabinet main controller is in the OFF state and sending this OFF
command to the slave controller. Removing the cable at J-2
disables the main controller’s authority over the slave controller,
allowing independent control.
3.5.2.9 Cabinet ON LED
Indicates cabinet ON status.
3.5.2.10 Cabinet Off Switch
A local OFF switch for emergency use and troubleshooting. It
will shut the cabinet down only momentarily if the main control-
ler is connected and in the ON state.
Removing the cable at J-2 gives the cabinet slave controller
independent control, but external interlock protection to the
cabinet is lost.
Figure 3-23. Slave Controller
Section III - Operation, Controls, and Indicators
Rev. B: 1/11/1999 888-2365-001 3-17
WARNING: Disconnect primary power prior to servicing.
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