Harris DX 25U - Page 86

Improper Overload Settings 6-17
Improper Air Flow 6-17
Transmitter Mistuning 6-17
OtherTroubleshootingTechniques............................................................. 6-18
Handling MOSFET’s.................................................................... 6-18
Testing MOSFET’s...................................................................... 6-18
FindingAMissingStep.................................................................. 6-18
Using FlexPatch™ forBypassingaFailedPAModule......................................... 6-18
Using FlexPatch™ for Isolating Modulation Encoder/RF Amplifier Problems. . . . . . . . . . . . . . . . . . . . . . . 6-19
MeasuringDriveLevel................................................................... 6-19
MeasuringDrivePhasing................................................................. 6-19
ExcessiveDrivePhaseDifference ...................................................... 6-20
RFAmplifierDrainPhasing............................................................... 6-20
ExcessiveDrivePhaseDifference ...................................................... 6-20
MeasuringSteps50-123:TESTSWITCH................................................ 6-21
DX-25U
6-4 888-2297-002 Rev. R: 11-11-96
WARNING: Disconnect primary power prior to servicing.