Nautel NV5LT Troubleshooting Manual

Contents

Nautel NV5LT Troubleshooting Manual Manual pdf 9 page image

NV5LT/NV3.5LT TROUBLESHOOTING MANUAL RESPONDING TO ALARMSVERSION 3.3 2016-03-10 PAGE 4.1.1SECTION 4.1: RESPONDING TO ALARMSThis section provides instructions you need when performing troubleshooting on the NV5LT/NV3.5LTtransmitter. This section includes the following topics: Corrective Maintenance Electrostatic Protection - see page 4.1.3 Identifying an Alarm - see page 4.1.4 Accessing the Inside of the Transmitter - see page 4.1.28 Troubleshooting Tips - see page 4.1.30 Replacement Procedures - see page 4.1.39If none of the procedures and alarms described in this section address your problem, contact Nautel forassistance. See “Technical support” on page ix.Corrective MaintenanceCorrective maintenance procedures consist of identifying and correcting defects or deficiencies thatarise during transmitter operation. Local and/or remote alarm signals are generated when amalfunction occurs. If an alarm condition is caused by a malfunction in the RF power stage, thetransmitter may maintain operation at a reduced RF output level. The nature of the fault – and stationpolicy – will dictate whether an immediate maintenance response is necessary. Fault analysis andrectification may be conducted from three different levels, with a different technical competence levelrequired for each: on-air troubleshooting, remote or local, and off-air troubleshooting.On-Air TroubleshootingOn-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 damagedif subjected to excessive heat or high voltage transients. Take every effort to ensurethat circuits are not overdriven or disconnected from their loads while turned on.