
VX150 TO VX2 TROUBLESHOOTING MANUAL
RESPONDING TO ALARMS
VERSION 2.0 2023-04-20
PAGE 3.1.1
SECTION 3.1: RESPONDING TO ALARMS
This section provides instructions you need when performing troubleshooting on the VX150 to VX2
transmitter. This section includes the following topics:
Electrostatic Protection - see page 3.1.3
Identifying and Troubleshooting an Alarm - see page 3.1.4
PA Resistance Checks - see page 3.1.35
Replacement Procedures - see page 3.1.36
If none of the procedures and alarms described in this section address your problem, contact Nautel for
assistance. See “Technical Support” in the Installation Manual.
Corrective Maintenance
Corrective maintenance procedures consist of identifying and correcting defects or deficiencies that
arise during transmitter operation. Local and/or remote alarm signals are generated when a
malfunction occurs. If an alarm condition is caused by a malfunction in the RF power stage, the
transmitter may maintain operation at a reduced RF output level. The nature of the fault – and station
policy – will dictate whether an immediate maintenance response is necessary. Fault analysis and
rectification may be conducted from three different levels, with a different technical competence level
required for each: on-air troubleshooting, remote or local, and off-air troubleshooting.
On-Air Troubleshooting
On-air troubleshooting can be performed from a remote location, or locally at the transmitter site.
CAUTION!
The transmitter contains many solid state devices that may be damaged
if subjected to excessive heat or high voltage transients. Take every effort to ensure
that circuits are not overdriven or disconnected from their loads while turned on.
Summary of Contents for VX150
Page 2: ......
Page 4: ......
Page 8: ...VX150 TO VX2 TROUBLESHOOTING MANUAL PAGE VIII VERSION 2 0 2023 04 20...
Page 42: ...RESPONDING TO ALARMS VX150 TO VX2 TROUBLESHOOTING MANUAL PAGE 3 1 34 VERSION 2 0 2023 04 20...
Page 132: ......
Page 136: ...VX150 TO VX2 TROUBLESHOOTING MANUAL WIRING INFORMATION PAGE 3 3 4 VERSION 2 0 2023 04 20...
Page 142: ...VX150 TO VX2 TROUBLESHOOTING MANUAL ELECTRICAL SCHEMATICS PAGE 3 4 6 VERSION 2 0 2023 04 20...
Page 168: ...VERSION 2 0 2023 04 20 MD 6 Figure MD 6 NAPI189 Analog Audio PWB...
Page 169: ...VERSION 2 0 2023 04 20 MD 7 Figure MD 7 NAPI187A System Interface PWB...
Page 171: ...VERSION 2 0 2023 04 20 MD 9 Figure MD 9 NAPI188 Power Supply Interface PWB VX1 VX1 5 VX2...
Page 172: ...VERSION 2 0 2023 04 20 MD 10 Figure MD 10 NAPI193 Front Panel User Interface PWB...
Page 173: ...VERSION 2 0 2023 04 20 MD 11 Figure MD 11 NAPA41 Pre Amp IPA PWB...
Page 174: ...VERSION 2 0 2023 04 20 MD 12 Figure MD 12 NAPA40A Power Amplifier PWB...
Page 175: ...VERSION 2 0 2023 04 20 MD 13 Figure MD 13 NAPF16A Low Pass Filter PWB...
Page 176: ...VERSION 2 0 2023 04 20 MD 14 Figure MD 14 NAPP15A Directional Coupler Bottom PWB...
Page 177: ...VERSION 2 0 2023 04 20 MD 15 Figure MD 15 NAPH15 2 Way Splitter PWB VX1 5 VX2...
Page 178: ...VERSION 2 0 2023 04 20 MD 16 Figure MD 16 2 Way Combiner PWB Nautel Part PU03B VX1 5 VX2...
Page 180: ...VX LP TROUBLESHOOTING MANUAL LIST OF TERMS PAGE 3 6 2 VERSION 2 0 2023 04 20...
Page 181: ......