COMPONENT FUNCTION/DESCRIPTION
DS12 Indicates RED when a +5 Volt regulator fault occurs; otherwise indicates green.
DS14 Indicates RED when a -5 Volt regulator fault occurs; otherwise indicates green.
DS17 Indicates RED when a +5 Volt regulator fault occurs; otherwise indicates green.
DS18 Indicates RED when a -5 Volt regulator fault occurs; otherwise indicates green.
DS22 Indicates RED when an AIR interlock fault exists; otherwise indicates green.
DS24 Overvoltage indication. Indicates RED when high voltage is over 260 Volts; otherwise indicates green.
DS26 Indicates RED when a three-phase power supply imbalance exists, either because of primary power phase loss
or high voltage supply fault.
DS7 Indicates RED when a Cable Interlock fault exists (a cable between the Modulation encoder is off or faulty, or a
PA module is missing), otherwise indicates green.
DS4 Indicates RED when the incoming audio and modulation envelope are not the same; indicates green when they
are the same. (Detects modulator section faults or missing RF power amplifier steps).
DS28 Indicates RED when RF drive to the power amplifier is too high; otherwise indicates green.
DS27 Indicates RED when RF drive to the power amplifier is too low; otherwise indicates green.
DS25 Indicates RED when a high voltage power supply overload occurs (either a Peak current overload or an Average
supply current overload).
DS23 Indicates RED when a door is open and the door interlock circuit shuts the transmitter OFF; indicates green
when door interlocks are closed.
DS21 Indicates RED when the external interlock circuit is open and the external interlock shuts the transmitter OFF;
indicates green when the external interlock circuit is complete.
DS8 Indicates RED when an output network fault or mistuning occurs; otherwise, indicates green.
DS16 Indicates RED when a VSWR occurs because of an antenna system (load) fault or mistuning of the transmitter
Tee matching network (Tune and Load controls).
DS5 Indicates RED when a +15 Volt regulator fault occurs; otherwise indicates green.
DS6 Indicates RED when a +15 Volt regulator fault occurs; otherwise indicates green.
DS13 Indicates RED when a +5 Volt regulator fault occurs; otherwise indicates green.
DS10 Indicates RED when a -15Vvolt regulator fault occurs; otherwise indicates green.
DS11 Indicates RED when a -15 Volt regulator fault occurs; otherwise indicates green.
DS15 Indicates RED when a Conversion Error is detected on the Analog to Digital Converter board (A34), otherwise
indicates green.
DS9 Indicates RED if the VSWR Self-Test does not Pass because of a VSWR detector or logic fault; otherwise,
indicates green. (VSWR self-test is done automatically each time primary power is applied or can be done
manually at any time).
DS3 Indicates RED if the Predriver loses RF output; indicates green if Predriver RF output is normal.
DS2 Indicates RED if the Buffer Amplifier loses RF output; indicates green if Buffer Amplifier RF output is normal.
DS1 Indicates RED if the Oscillator board loses RF output; indicates green if Oscillator board RF output is normal.
DS20 Indicates that the transmitter is in the LOCAL control mode.
DS19 Indicates that the transmitter is in the REMOTE control mode, and can be controlled either from front panel
controls or by remote control.
R86 Sets high voltage power supply protection sensitivity.
R41 Sets PA Overdrive Fault sensing sensitivity.
R67 Sets PA Underdrive Fault sensing sensitivity.
R68 Sets high voltage power supply peak current overload sensitivity.
R42 Sets high voltage power supply average current overload sensitivity.
S4 Selects Local control (remote control disabled) or Remote control (remote control enabled).
Table Q-3
LED Board Controls and Indicators
Section Q - LED Board (A32)
Rev. R: 11-11-96 888-2297-002 Q-23
WARNING: Disconnect primary power prior to servicing.
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