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Servicing Satellite TV Equipment

Book Description

This is the definitive practical guide to fault-finding, troubleshooting and servicing satellite television equipment, both indoors and outdoors. It will take you through all areas of satellite television system servicing from the simplest fixed dish to fully motorised systems. From PAL to Mac to MPEG all contemporary systems are covered.

Satellite TV systems have been installed in a wide variety of locations, using a bewildering range of equipment. That equipment is beginning to need maintenance and repair. To cope with the volume and variety of work, Nick Beer has written the first guide to satellite TV which concentrates on what to look for and what to do when it goes wrong. This book is up to date and crammed with real-life experience, not theoretical data or manufacturer's ideal specs.

Nick Beer has already written the best-selling Servicing Audio and Hi-fi Equipment and is a technical correspondent for many UK and international journals such as Television. He also works as an engineer and teaches satellite servicing to technicians.

  • A practical guide to a new and important area for service engineers
  • Covers indoor and outdoor equipment
  • Written by an experienced author, teacher and engineer

Table of Contents

  1. Cover image
  2. Title page
  3. Table of Contents
  4. Copyright
  5. PREFACE
  6. ACKNOWLEDGEMENTS
  7. Chapter 1: INTRODUCTION
    1. Service necessities
    2. Workshop conditions
    3. Field operations
    4. The fault
    5. The repair
    6. Intermittent faults
    7. Adjustments
    8. Repair estimates
    9. Equipment lifespan
    10. Service information
    11. Spare-part ordering
  8. Chapter 2: TOOLS AND TEST EQUIPMENT
    1. Hand tools
    2. Ladders
    3. Signal strength meter
    4. Field monitor
    5. Spectrum analyser
    6. Test equipment for digital signals
    7. Multimeter
    8. Oscilloscope
    9. Signal generators
    10. Bench power supply
    11. Frequency counter
    12. Portable appliance tester
    13. Infra-red output detector
    14. Infra-red handset tester
  9. Chapter 3: DISHES AND FEEDS
    1. The dish reflector
    2. Reflector constructions
    3. Non-metallic dishes
    4. When is it necessary to replace a dish?
    5. Painting dishes
    6. Dish antennae configurations
    7. Dish alignment
    8. Weak signals
    9. Booms and feed mounts
    10. Cables
  10. Chapter 4: DEPOLARISERS AND LOW NOISE BLOCKS
    1. Depolarisers
    2. Types of depolariser
    3. Voltage switching (Marconi)
    4. The low noise block (LNB)
  11. Chapter 5: DISTRIBUTION SYSTEMS
    1. Signal distribution methods
    2. Safety
    3. Depolarisation control
    4. I.f. distribution
    5. Powering systems
  12. Chapter 6: ACTUATORS AND POSITIONERS
    1. The actuator arm
    2. Actuator feedback
    3. Positioners
  13. Chapter 7: TUNERS AND TUNING SYSTEMS
    1. The tuner
  14. Chapter 8: VIDEO PROCESSING CIRCUITS
    1. Demodulators
    2. Video de-emphasis, amplifiers and filters
    3. Teletext
  15. Chapter 9: RECEIVER AUDIO CIRCUITS
    1. Digital audio via satellite
    2. Typical symptoms
    3. The audio path
    4. The modern approach to audio processing
    5. Audio switching
    6. Muting
    7. Dolby Surround and Pro-Logic
    8. Audio power amplifiers
    9. Interfacing with the outside world
  16. Chapter 10: POWER SUPPLY CIRCUITS
    1. Safety
    2. Mains filtering
    3. Fuse types
    4. Linear PSUs
    5. Rectifiers
    6. Smoothing/reservoir capacitors
    7. Split supplies
    8. Transistor regulators
    9. IC regulators
    10. D.c.–d.c converters
    11. Protection Zener diodes
    12. Power indicators
  17. Chapter 11: SYSTEM CONTROL CIRCUITS
    1. Fault finding system control circuits
    2. Input problems
    3. Output problems
    4. Data buses
    5. Memory circuits
    6. Displays
    7. Electronic variable resistors (EVRs)
  18. Chapter 12: R.F. MODULATORS AND AMPLIFIERS
    1. What?
    2. Conventional modulators/amplifiers
    3. Voltage supplies
    4. Signal inputs
    5. Broadband modulators
    6. Setting r.f. outputs
    7. Internal modulator failures
    8. R.f. amplifiers
    9. Dealing with interference pick-up
    10. R.f. amplifier problems
    11. Amplifier/modulator problems
    12. Fault finding in general
  19. Chapter 13: DECODERS AND DESCRAMBLERS
    1. Security
    2. Decoder interfacing
    3. Videocrypt
    4. Security process
    5. Pirate Videocrypt hacks
    6. Videocrypt faults
    7. Lock-ups
    8. Vision faults
    9. Random operation of Videocrypt decoder
    10. Radiation
    11. D2MAC decoders
  20. Chapter 14: DIGITAL TELEVISION AND MPEG-2
    1. Principles of digital video
    2. Source image coding
    3. Application of redundancy
    4. Transmission modulation methods
    5. Receivers
    6. Data and communications
    7. Servicing
  21. Chapter 15: REPAIR TECHNIQUES
    1. Printed circuit boards
    2. Surface mounted devices
    3. Desoldering
    4. Resoldering
    5. Anti-static precautions
    6. Use of variac, bulbs and dummy loads
    7. Thermal faults
  22. Appendix 1: REFERENCE DATA
  23. Appendix 2: SAFETY, BEAB AND BS 415: 1990
  24. Appendix 3: ADDRESSES
  25. INDEX