TYPE 1
TURNS PA POWER SUPPLY OFF (Manual Restart Required)
EXT
External Interlock
AIR
Air Flow Fault
DOOR
Door Interlock
SUPPLY FAULT
PA Power Supply Protection
OVER VOLTAGE
PA Power Supply Overvoltage Protection
CABLE INTERLOCK
Modulation and Driver Encoder Cables
B+
DC Regulator B+ Regulated Fault
B-
DC Regulator B- Regulator Fault
+5V
Output M5V on board Regulator Fault
+15V
Output M15V on board Regulator Fault
REPEATING TYPE 2 FAULT See NOTE below
TYPE 2
TURNS PA POWER SUPPLY OFF (Recycles Back ON)
UNDER DRIVE
RF Drive Level to PA LOW
OVER DRIVE
RF Drive Level to PA HIGH
OVER CURRENT *
PA Power 230 Vdc Overload
* Transmitter will attempt to limit current first, then shut off high voltage if limiting is not sufficient.
NOTE: If Type 2 fault condition is still present when the transmitter cycles back on,or repeats within 2.4 seconds after the
transmitter cycles back on, it becomes a Type 1 fault and will require a manual restart.
TYPE 3
LOWER POWER OUTPUT
BANDPASS VSWR
Output Monitor detects sucessive VSWR’s
ANT. VSWR
Output Monitor detects sucessive VSWR’s
TEMPERATURE
Driver Encoder/Temp Sensor detects an over temperature condition
TYPE 4
PA TURN OFF ONLY (PA Kill only, High Voltage Remains ON)
BANDPASS VSWR
Output Monitor detects one shot VSWR
ANT. VSWR
Output Monitor detects one shot VSWR
+15V
A/D Converter on board +15V Regulator Fault
-15V
A/D Converter on board -15V Regulator Fault
+5V
A/D Converter on board +5V Regulator Fault
+15V
Analog Input on board +15V Regulator Fault
-15V
Analog Input on board -15V Regulator Fault
TYPE 5
CLEAR MODULATOR DIGITAL AUDIO DATA
CONVERSION ERROR
A/D Converter
TYPE 6
FAULT DISPLAY ONLY
RF AMP
PA RF Amplifier Fuse Blown
Table 6-1. DX 25U Fault Types
Section VI - Troubleshooting
Rev. R: 11-11-96
888-2297-002
6-5
WARNING: Disconnect primary power prior to servicing.
