Acrodyne NW8201E DIGITAL TELEVISION BROADCAST TRANSMITTER User Manual 32 NV8202 26 04 06 01 00

Acrodyne Industries, Inc. DIGITAL TELEVISION BROADCAST TRANSMITTER 32 NV8202 26 04 06 01 00

Users Manual Part 14

Broadcasting Division2095.7346.32 - 6.0 - E-1CHAPTER 6MAINTENANCEPrinted in Germany
Chapter 6 Maintenance2098.1190.72 - 6.01 - E-1CONTENTS1 Maintenance Information ................................................................ 11.1 Recommendation ...........................................................................................11.2 Maintenance of Subcontractor Products .....................................................1
Chapter 6 Maintenance2098.1190.72 - 6.1 - E-11 Maintenance Information1.1 RecommendationThe transmitter is designed to provide years of operation with little maintenance. Rohde &Schwarz recommends to perform the following maintenance tasks as a precaution:Software updates for the NETCCU®, the exciter and the amplifier, if required (for improved performance and for retrofitting options)Replacing the two rack fans after approx. 40000 operating hoursReplacing the two fans in the exciter after approx. 40000 operating hours1.2 Maintenance of Subcontractor ProductsSubcontractor products such as external air filters must be maintained in accordance withthe maintenance instructions of the individual manufacturer/product.
Broadcasting Division2095.7346.32 - 7.0 - E-1CHAPTER 7TROUBLESHOOTINGPrinted in Germany
Chapter 7 Troubleshooting2098.1190.72 - 7.01 - E-1CONTENTS1 Information ....................................................................................... 1
Chapter 7 Troubleshooting2098.1190.72 - 7.1 - E-11 InformationTroubleshooting information will be provided at a later date.
Broadcasting Division2095.7346.32 - 8.0 - E-1CHAPTER 8SERVICEPrinted in Germany
Chapter 8 Service2099.9595.72 - 8.01 - E-2CONTENTS1 Required Test Equipment and Tools ............................................. 12 Overview ........................................................................................... 23 Preparatory Work ............................................................................. 33.1 Safety ...............................................................................................................33.2 Rack Cabling ...................................................................................................33.3 Removing the Front Panel/Rear Panel .........................................................44 Power Distribution ........................................................................... 54.1 Replacing the Main Switch ............................................................................54.1.1 Removing the Main Switch ...........................................................................54.1.2 Installing the Main Switch .............................................................................64.2 Replacing the Motor Protection Switch ........................................................74.2.1 Removing the Motor Protection Switch ........................................................74.2.2 Installing the Motor Protection Switch ..........................................................94.3 Replacing the Power Distribution Board ....................................................104.3.1 Removing the Power Distribution Board ....................................................104.3.2 Installing the Power Distribution Board ......................................................114.4 Replacing an Automatic Line Fuse .............................................................124.4.1 Removing an Automatic Line Fuse ............................................................124.4.2 Installing an Automatic Line Fuse ..............................................................134.5 Replacing the Auxiliary Power Supply .......................................................134.5.1 Removing the Auxiliary Power Supply .......................................................134.5.2 Installing the Auxiliary Power Supply .........................................................145 Transmitter Control Unit ............................................................... 155.1 Replacing the NETCCU ................................................................................155.1.1 Removing the NETCCU .............................................................................155.1.2 Preparing the NETCCU for Installation ......................................................165.1.3 Installing the NETCCU ...............................................................................175.2 Replacing the Rack Controller ....................................................................175.2.1 Removing the Rack Controller ...................................................................175.2.2 Installing the Rack Controller .....................................................................18
Chapter 8 Service2099.9595.72 - 8.02 - E-26 Exciter Components ...................................................................... 196.1 Replacing the Exciter ...................................................................................196.1.1 Removing the Exciter .................................................................................196.1.2 Installing the Exciter ...................................................................................206.2 Replacing the Exciter Switch ......................................................................216.2.1 Removing the Exciter Switch ......................................................................216.2.2 Installing the Exciter Switch ........................................................................217 Output Stage Components ........................................................... 237.1 Replacing the Amplifier ...............................................................................237.1.1 Removing the Amplifier ..............................................................................237.1.2 Installing the Amplifier ................................................................................247.2 Replacing the Absorber ...............................................................................247.2.1 Removing the Absorber ..............................................................................247.2.2 Installing the Absorber ................................................................................258 Harmonics Filter ............................................................................ 268.1 Replacing the Harmonics Filter ...................................................................268.1.1 Removing the Harmonics Filter ..................................................................268.1.2 Installing the Harmonics Filter ....................................................................279 Cooling System .............................................................................. 289.1 Replacing the Fan .........................................................................................289.1.1 Removing the Fan ......................................................................................289.1.2 Installing the Fan ........................................................................................309.2 Replacing the Starting Capacitor ................................................................309.2.1 Removing the Starting Capacitor ...............................................................309.2.2 Installing the Starting Capacitor .................................................................319.3 Replacing the Differential Pressure Gage ..................................................319.3.1 Removing the Differential Pressure Gage ..................................................329.3.2 Installing the Differential Pressure Gage ....................................................329.4 Replacing Temperature Sensors ................................................................339.4.1 Removing a Temperature Sensor ..............................................................339.4.2 Installing a Temperature Sensor ................................................................3410 Transformer .................................................................................... 35
Chapter 8 Service2099.9595.72 - 8.1 - E-21 Required Test Equipment and ToolsThe specified tools and test equipment include only those items needed for removing sys-tem components and carrying out simple checks on them. Depending on the service work to be performed, you will require the following tools: Screwdriver No. 0Screwdriver No. 1Screwdriver No. 2Phillips screwdriver No. 0Phillips screwdriver No. 1Phillips screwdriver No. 2Torx screwdriver No. 8Torx screwdriver No. 9Torx screwdriver No. 20Hexagonal socket No. 3Hexagonal socket No. 6Open-end wrench No. 7Open-end wrench No. 8Open-end wrench No. 13Multimeter
Chapter 8 Service2099.9595.72 - 8.2 - E-22 OverviewYou can remove and exchange the following instruments and transmitter components if er-rors occur: Power distribution– Main switch– Motor protection switch– Automatic line fuse– Power distribution board– Auxiliary power supplyTransmitter control unit–NETCCU®– Rack controllerExciter components–Exciter– Exciter switch (in the case of exciter standby)Output stage components– Amplifiers– AbsorberHarmonics filterCooling system–Fans– Starting capacitor– Differential pressure gage– Temperature sensorsTransformer (optional)
Chapter 8 Service2099.9595.72 - 8.3 - E-23 Preparatory Work3.1 SafetyNote Full information on the subject of safety can be found in the section "Safety".3.2 Rack CablingThe standard components of the NW820x transmitter are fully cabled together on delivery.You need to reconnect the separate replacement instruments during service work. Each cable has a yellow collar at each end, inscribed with the cable number (W...) and theintended purpose (module number A..., connector number X...). This makes it easier toconnect the cable concerned to the intended slot or connection point, since the modulesare provided with an engraved or self-adhesive circuit diagram.For easy connection of replacement instruments or devices proceed as follows:1. Find the plug (connector) number from the yellow collar on the cable.2. Find the same number on the instrument you wish to connect (by looking for the femaleconnector or circuit diagram).3. Insert the plug connector into the corresponding female connector.ATTENTION!You need to pay particular attention to safety during service work. As a matter of principle all service work must be carried out by qualified personnel on components that are free of any voltage. Heavy components such as amplifiers must always be replaced in twos.
Chapter 8 Service2099.9595.72 - 8.4 - E-23.3 Removing the Front Panel/Rear PanelTo remove the front panel/rear panel proceed as follows:)Using a Torx screwdriver, remove the front or rear panel.Fig. 1 Ground terminal of a front panel/rear panel

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