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Elements and Performance Criteria

1. Determine requirements
   • Audio and video system and reproducer component defect reports (removal tags) or customer order are correctly interpreted and matched by part and serial numbers
   • Circuitry is correctly prepared and connected to the applicable test equipment and is functionally tested or cycled through the prescribed test procedures in accordance with the maintenance documentation for evidence of serviceability or malfunction
   • Modification status is clearly established to assist in determining the overhaul requirements for the components
   • Extent of overhaul or repair is correctly identified and documented
2. Dismantle and inspect audio and video system and reproducer components
   • Component parts are dismantled in accordance with maintenance manuals while observing all relevant work health and safety (WHS) requirements
   • Component parts are assessed for serviceability in accordance with the relevant maintenance documentation
   • Parts requiring specialist repair are tagged and repair instructions are accurately specified
   • Parts lists are compiled and processed in accordance with standard enterprise procedures
3. Repair and/or modify audio and video system and reproducer
   • Component parts are repaired or replaced in accordance with the relevant maintenance documentation
   • Modification of components or parts is undertaken, where required, by relevant manufacturers’ bulletins or procedures
4. Assemble, test and adjust audio and video system and reproducer components
   • Assembly of component parts is carried out in accordance with specified tolerances and the applicable maintenance documents
   • Assembled components are tested and adjusted in accordance with the applicable maintenance documentation using the appropriate test equipment
   • Required maintenance documentation and modification records are completed and processed in accordance with standard enterprise procedures

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.
Audio and video systems and reproducers include:	Video cassette recorders (VCRs) Video display systems Cathode ray tube (CRT) display systems Symbol generators Audio amplifiers Audio and video selectors Voice recorders Microphones Head sets Passenger control units (PCUs) Tape reproducers (and tape reproduction)
Procedures and requirements include:	Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

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Performance Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria under the specified conditions of assessment, and must include:

applying relevant WHS practices

using approved repair/overhaul procedures and processes relating to analogue and digital circuitry

recognising the serviceability state and repair or overhaul requirements for digital electronic interface systems:

VCRs

video display systems

CRT display systems

symbol generators

audio amplifiers

audio selectors

voice recorders

microphones

head sets

PCUs

tape reproducers (and tape reproduction)

applying logic processes, and using test equipment and appropriate wiring diagrams and manuals to isolate component faults

performing component testing to isolate/confirm component fault and assess post-repair/overhaul serviceability.

It is essential that component testing procedures, cleanliness requirements and safety precautions applicable to the components being maintained are fully observed, understood and complied with. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice across a range of inspection, testing and troubleshooting applications (including the timely involvement of supervisors or other trades) is critical.

Evidence of transferability of skills and knowledge related to repair, modification and overhaul is essential. This may be demonstrated through application across a range of components listed in the Assessment Conditions.

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Knowledge Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

component and system operation

the basic function and operation of audio and visual and reproducer components to enable testing for fault isolation/confirmation to determine repair or overhaul requirements, and serviceability status post-repair or overhaul

basic principles/functions relating to audio and visual and reproducer components and associated with:

advanced analogue fundamentals

basic logic and semiconductor theory

digital fundamentals

electrostatic discharge (ESD) precautions

alternating current (AC) and direct current (DC) electrical systems

video display theory

video recorder theory

cleaning and maintenance techniques for video and recorder heads

aircraft display systems

symbol generation

vector and raster graphics

audio circuit theory

sound measurement

decibel (dB) level standards

audio tape control signals and recording techniques

basic logic and semiconductor theory

cleaning and maintenance techniques for audio recorder heads.

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