Harris DX 25U - Page 84

PossibleCauses.......................................................................... 6-8
Modulation not reaching transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Analog Input Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
ColorStat™ panelOvercurrentFaultIndication.................................................... 6-8
Random Faults With Program Audio. Possible Causes: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Faults With Tone Modulation. Possible Causes:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
OverloadsonTurnOn.PossibleCauses:...................................................... 6-9
ColorStat™ panelOvervoltageFault............................................................. 6-9
PossibleCauses.......................................................................... 6-9
SupplyVoltageTooHigh.............................................................. 6-9
ColorStat™ panelSupplyFault................................................................ 6-10
PossibleCauses......................................................................... 6-10
InputAC3PhaseLineImbalance ...................................................... 6-10
Open+115VDCSupplyRectifierFuse.................................................. 6-10
Failed PA Power Supply Transformer T1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
LowFrequency,HighLevelModulation................................................. 6-10
OverloadSettings.................................................................... 6-10
ColorStat™ panelUnderdriveFault............................................................ 6-10
PossibleCauses......................................................................... 6-10
HighVoltageSupplyShort............................................................ 6-10
Failed Driver Supply (+115 VDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
FailedPredriverSupply(+60VDC)..................................................... 6-10
NoDriveToTheDriverStage......................................................... 6-11
Driver Module Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
ExcessiveRFAmplifierFailures ....................................................... 6-11
Driver Supply Regulator Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Driver Supply Regulator Loop Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
DefectiveDriverEncoderSignals....................................................... 6-11
SevereDriverMistuning.............................................................. 6-11
ColorStat™ panelOverdriveFault ............................................................. 6-11
PossibleCauses......................................................................... 6-11
HighACLineVoltage ............................................................... 6-11
DefectiveDriverEncoderSignals....................................................... 6-11
RFAmplifierON/OFFCircuitry ....................................................... 6-11
Driver Supply Regulator Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
ColorStat™ panelDoorInterlock.............................................................. 6-12
PossibleCauses......................................................................... 6-12
DefectiveInterlockSwitch............................................................ 6-12
deleted03-01-96 .................................................................... 6-12
BadConnectionatDCRegulator....................................................... 6-12
ColorStat™ panelExternalInterlock............................................................ 6-12
PossibleCauses......................................................................... 6-12
ExternalInterlockTerminalsOpen...................................................... 6-12
ExternalInterlockFuseF24 ........................................................... 6-12
ExternalInterlockRelayK3........................................................... 6-12
DC Regulator Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
ColorStat™ panelAirInterlock................................................................ 6-12
Possiblecauses......................................................................... 6-12
Fans Not Operating Properly, Failed/Running Backward . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
DirtyFilters........................................................................ 6-12
TopAirExhaustRestricted............................................................ 6-12
Rear Access Panel Open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
AirInterlockSensingCircuitry......................................................... 6-12
AirInterlockDetectorU17............................................................ 6-12
ColorStat™ panelOscillatorFault.............................................................. 6-13
ColorStat™ panelBufferFault................................................................ 6-13
DX-25U
6-2 888-2297-002 Rev. R: 11-11-96
WARNING: Disconnect primary power prior to servicing.