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.
