Troubleshooting Manual
Table Of Contents
- Contact Information
- RELEASE CONTROL RECORD
- SECTION 3.1: Responding to alarms
- SECTION 3.2: Parts Information
- SECTION 3.3: Reading Electrical Schematics
- Figure SD-14: NAPF16 Low Pass Filter PWB
- Figure SD-15: NAPP15 Directional Coupler Bottom PWB
- Figure SD-1: VX150/VX300/VX600 and VX1 Transmitter - Control/Monitor Stage
- Figure SD-2: VX150/VX300/VX600 and VX1 Transmitter - Ac and RF Power Stages
- Figure SD-3: VX1.5/VX2 Transmitter - Control/Monitor Stage
- Figure SD-4: VX1.5 Transmitter - Ac and RF Power Stages
- Figure SD-5: NAPI189 Analog Audio PWB (Sheet 1 of 2)
- Figure SD-7: NAPI187 System Interface PWB (Sheet 1 of 2)
- Figure SD-8: NAPI187 System Interface PWB (Sheet 2 of 2)
- Figure SD-9: NAPI188/01 Power Supply Interface PWB, 2 kW (VX150/VX300/VX600)
- Figure SD-10: NAPI188 Power Supply Interface PWB, 3.5 kW (VX1/VX1.5/VX2)
- Figure SD-11: NAPI193 Front Panel User Interface PWB
- Figure SD-12: NAPA41 Pre-Amp/IPA PWB
- Figure SD-13: NAPA40 Power Amplifier PWB
- Figure SD-16: NAPH15 2-Way Splitter PWB (VX1.5/VX2)
- Figure SD-6: NAPI189 Analog Audio PWB (Sheet 2 of 2)
- SECTION 3.4: Mechanical Drawings
- Figure MD-1: VX150/VX300/VX600/VX1 Transmitters
- Figure MD-4: NAPI187 System Interface PWB
- Figure MD-5: NAPI188/01 Power Supply Interface PWB (VX150/VX300/VX600)
- Figure MD-11: NAPP15 Directional Coupler PWB
- Figure MD-12: NAPH15 2-Way Splitter PWB (VX1.5/VX2)
- Figure MD-7: NAPI193 Front Panel User Interface PWB
- Figure MD-6: NAPI188 Power Supply Interface PWB (VX1/VX1.5/VX2)
- Figure MD-13: 2-Way Combiner PWB (Nautel Part # PU03A) (VX1.5/VX2)
- Figure MD-8: NAPA41 Pre-Amp/IPA PWB
- Figure MD-9: NAPA40 Power Amplifier PWB
- Figure MD-10: NAPF16 Low Pass Filter PWB
- Figure MD-2: VX1.5/VX2 Transmitter
- Figure MD-3: NAPI189 Analog Audio PWB
- SECTION 3.5: List of terms
- Blank Page
VX150 TO VX2 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
VERSION 0.1 2020-12-01 PAGE 3.1.15
SWR Shutback This alarm occurs if the transmitter's reflected power suddenly exceeds the SWR shutback
threshold, which is the reflected power that is equivalent to a 2:1 VSWR at max power (??
W) due to a transient SWR condition (arc or lightning) within the output transmission line or
antenna system. Attempt to reset the latched condition by clicking the remote AUI’s Reset
Latched Alarms button in the Alarms page or using the local front panel display (see
“Resetting Alarms” on page 2-96 of the Operations and Maintenance Manual)]. Inspect the
output transmission line for punctures or damage. If no damage can be found, suspect the
Combiner Interface PWB (A12) (see “Combiner Interface PWB Replacement” on page 1-50)
or the Output Power Probe PWB (A7) (see “Output power probe PWB replacement” on page
1-45). See also SWR Cutback alarm
Thermal Shutdown
Unsigned DSP Image This alarm indicates that the exciter is operating with ‘unsigned code’, but is otherwise
operational. This alarm may only be displayed if the transmitter is operating with a ‘beta’
version of factory software.
Unsigned FPGA Image This alarm indicates that the exciter is operating with ‘unsigned code’, but is otherwise
operational. This alarm may only be displayed if the transmitter is operating with a ‘beta’
version of factory software.
Unsupported Audio Mode This alarm indicates that the user has selected a preset configuration for the audio
processing in the exciter that cannot be implemented. This may be due to attempting to use
the same physical input for multiple purposes, or because two incompatible modes have
been selected.
Very Low Forward Power This alarm occurs if the transmitter's average forward power falls below the very low forward
power threshold (defaulted to 12.5% of the preset power level and is user adjustable) due to
PA failures, fan failures, or SWR foldback. The transmitter takes no action on this alarm. See
Low Forward Power for troubleshooting tips.
Alarm Name Description and Troubleshooting Action