8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and carrying out repairs of predictable faults in audio and video replay/recording apparatus All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EH117A Audio and video recording and replaying apparatus Evidence shall show an understanding of electronic communications systems, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: T1. Sound reproduction fundamentals Sound wave propagation Timbre of sound Effects of other medium of sound waves Characteristics of the human ear Difference between mono and stereo Surround sound principles T2. Audio reproduction, electronic components Preamplifiers amplifier encompassing: Function in the reproduction chain Typical circuit arrangements Power and integrated amplifiers encompassing: Function in the reproduction chain Typical circuit arrangements Graphic equalizers encompassing: Function in the reproduction chain Typical circuit arrangements Component installation and interconnections T3. Audio reproduction, speaker fundamentals Types of speaker drives and their operating mechanism Speaker cabinet characteristics Purpose and circuit arrangement of typical cross-over networks Speaker installation and connections T4. Audio/video recording and replay components repair basics Sub-system components (i.e. functional blocks) and their operating parameters Common faults, their symptoms and cause. Fault location procedures and testing points Device adjustments - audio/video systems are compact disk players, DVD players and AV systems T5. Audio/video control equipment Types of control devices and their operating principles Control equipment arrangement in an audio/video system Safe use of electrical testing device, and Checks and storage methods for maintaining the safety of testing device T6. Technical manuals and catalogues Typical format How to read and apply information T7. Digital versatile disc (DVD) and compact disc (CD) Operational principles and standards of digital signal processing Standards and features of DVDs and CDs Operation and adjustment of DVDs and CDs, as well as Transport mechanisms Laser alignment/tracking Servo system description, operation and adjustment of servo loops System control of player On screen display including service mode set-up on adjustment T8. Digital audio Fundamentals of digital audio systems Signal processing within the encoding of a system Error checking techniques in the encoder process Modulation used in the encoding process The process for decoding digital audio signals to produce analogue stereo output Features and operation of compact disk players T9. Compact disk players Characteristics of optical digital recording Components of CD players Operation of servo loops Digital signal processing System control sections of a CD T10. Digital versatile disk processors Operating principles, characteristics, features and standards of DVD players Components and adjustment of DVD players T11. Audio/video recording and replay components repair basics Sub-system components (i.e. functional blocks) and their operating parameters Common faults, their symptoms and cause. Fault location procedures and testing points Device adjustments - audio/video systems are compact disk players, DVD players and AV systems |