Harris DX 25U - Page 8

Type5Faults..................................Q-4
Type6Faults..................................Q-4
RFSenseCircuits...............................Q-4
ResetCircuit...................................Q-4
CircuitDescriptions...............................Q-5
ResetCircuit...................................Q-7
Type1FaultCircuits............................Q-7
Type2FaultCircuits...........................Q-10
Type3FaultCircuits...........................Q-12
Type4FaultCircuits...........................Q-16
Type5FaultsCircuit...........................Q-18
Type6FaultCircuit............................Q-18
“RFSense”CircuitsontheLEDBoard............Q-18
OSCTESTswitchS1 ..........................Q-20
Maintenance....................................Q-20
PrintedCircuitBoardMaintenance................Q-20
Adjustments..................................Q-20
Section R
Switch Board/meter Panel (A31)
Introduction ..................................... R-1
PowerControl.................................. R-1
MultimeterCircuit(M1) ......................... R-1
SupplyCurrentMeterCircuit(M2)................. R-1
PowerMeterCircuit(M3)........................ R-1
Maintenance.....................................R-2
Adjustments....................................R-2
Troubleshooting ..................................R-2
Symptom:IncorrectMeterIndications...............R-2
Section S
Driver Encoder/Temp Sense Board (A19)
GeneralDescription ...............................S-1
TheoryOfOperation ..............................S-1
DriverTurn-OnControl..........................S-1
TemperatureSensor/PowerFoldback ...............S-3
AirFlowDetection..............................S-4
CableInterlockMonitor..........................S-5
PowerSupplies.................................S-5
Maintenance.....................................S-5
Adjustment......................................S-5
Appendix A
Lightning Protection Recommendation
Introduction...................................... a-1
EnviornmentalHazards............................. a-1
WhatCanBeDone?............................... a-1
ACServiceProtection ............................. a-2
Conclusion....................................... a-3
8/9/2000 888-2297-002 ix
WARNING: Disconnect primary power prior to servicing.