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 diagnosing and rectifying faults in display circuits

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies

KSEHA Electronic displays faults

Evidence shall show an understanding of electronic displays faults applying safe working practices and relevant Standards Codes and Regulations to an extent indicated by the following aspects

T Cathode ray tube displays encompassing

Operation and characteristics of various types of cathoderay tubes including delta inline and precision inline

Voltages statics and xrays around CRTs

Set up and adjustment techniques

Rear and front projection TV systems

Typical faults

T Plasma displays and their circuit control operation encompassing

Advantages of flat panel displays over conventional CRTs Raster geometry etc

Theory of plasma gas discharge and phosphor excitation

Scanning techniques columnrow addressing

Luminancecolour aspects the need to readdress pixels to control light output

Gamma correction considerations reversal of the gamma correction that is carried out at the TV studio to compensate for the nonlinearity of light output of a conventional CRT

Plasma flat panel construction and handling

T Liquid crystal displays and the control circuit operation encompassing

Principles of transmissive LCD displays as opposed to reflective types

Light polarisation polarisation twisting characteristics of liquid crystal and the

need for polarisation filters in display panel

Voltagecurrent requirements and need for electric field

Fluorescent back light need for high frequency operation and power requirements

Scanning techniques colourrow addressing and thin film transistors

Light attenuation caused by the many layersfilters the back light has to pass through

Construction and handling

T Display circuit diagnostics encompassing

Subsystem components ie functional blocks and their operating parameters

Factors effecting system performance

Typical faults their symptoms and cause

Fault diagnosis procedures and testing

Subsystem adjustments

T Advance electronic measuring instruments encompassing

Testmeasuring devices and their application Examples are frequency counters and synthesisers spectrum analysers noise and distortion meters and RF communications service monitor

T Connection of testmeasuring devices into a circuit encompassing

safety procedures

loading and matching

storage and delay

circuit arrangement of testmeasuring devices

T Taking and interpreting readings

T Notion of decibels including dBm dBr dBu dBo

T OHS enterprise responsibilities encompassing

Provisions of relevant health and safety legislation

Principles and practice of effective occupational health and safety management

Management arrangements relating to regulatory compliance

Enterprise hazards and risks control measures and relevant expertise required

Characteristics and composition of workforce and their impact on occupational health and safety management

Relevance of enterprise management systems to occupational health and safety management

Analysis of working environment and design of appropriate occupational health and safety management systems

Analysis of relevant data and evaluation of occupational health and safety system effectiveness

Assess resources to establish and maintain occupational health and safety management systems

The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria Required Skills and Knowledge the Range Statement and the Assessment Guidelines for this Training Package

The Evidence Guide forms an integral part of this unit It must be used in conjunction with all parts of the unit and performed in accordance with the Assessment Guidelines of this Training Package

Overview of Assessment

Longitudinal competency development approaches to assessment such as Profiling require data to be reliably gathered in a form that can be consistently interpreted over time This approach is best utilised in Apprenticeship programs and reduces assessment intervention It is the Industrypreferred model for apprenticeships However where summative or final assessment is used it must include the application of the competency in the normal work environment or at a minimum the application of the competency in a realistically simulated work environment It is recognised that in some circumstances assessment in part or full can occur outside the workplace However it must be in accord with industry and regulatory policy

Methods chosen for a particular assessment will be influenced by various factors These include the extent of the assessment the most effective locations for the assessment activities to take place access to physical resources additional safety measures that may be required and the critical nature of the competencies being assessed

The critical safety nature of working with electricity electrical equipment gas or any other hazardous substancematerial carries risk in deeming a person competent Sources of evidence need to be rich in nature to minimise error in judgment

Activities associated with normal everyday work influence decisions about howhow much the data gathered will contribute to its richness Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package

Critical aspects of evidence required to demonstrate competency in this unit

Before the critical aspects of evidence are considered all prerequisites shall be met

Evidence for competence in this unit shall be considered holistically Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the Assessment Guidelines UEE Evidence shall also comprise

A representative body of work performance demonstrated within the timeframes typically expected of the discipline work function and industrial environment In particular this shall incorporate evidence that shows a candidate is able to

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation regulations polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below

Diagnose and rectify faults in display circuits as described in and including

Applying logical diagnostic methods

Using fault scenarios to test the source of circuit faults

Identifying the cause faults using logical diagnostic methods

Rectifying faults effectively

Verifying that the display operates correctly

Documenting fault rectification

Dealing with unplanned events by drawing on essential knowledge and skills to provide appropriate solutions incorporated in a holistic assessment with the above listed items

Note

Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

Context of and specific resources for assessment

This unit should be assessed as it relates to normal work practice using procedures information and resources typical of a workplace This should include

OHS policy and work procedures and instructions

Suitable work environment facilities equipment and materials to undertake actual work as prescribed by this unit

These should be part of the formal learningassessment environment

Note

Where simulation is considered a suitable strategy for assessment conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy

The resources used for assessment should reflect current industry practices in relation to diagnosing and rectifying faults in display circuits

Method of assessment

This unit shall be assessed by methods given in Volume Part Assessment Guidelines

Note

Competent performance with inherent safe working practices is expected in the industry to which this unit applies This requires that the specified essential knowledge and associated skills are assessed in a structured environment which is primarily intended for learningassessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit

Concurrent assessment and relationship with other units

There are no concurrent assessment recommendations for this unit

The critical aspects of occupational health and safety covered in unit UEENEEEA and other discipline specific occupational health and safety units shall be incorporated in relation to this unit

The critical aspects of occupational health and safety covered in unit UEENEEE101A and other discipline specific occupational health and safety units shall be incorporated in relation to this unit.