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Evidence Guide: UEENEEH176A - Diagnose and rectify faults in electronic display circuits

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

UEENEEH176A - Diagnose and rectify faults in electronic display circuits

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare to diagnose and rectify faults

  1. OHS procedures for a given work area are identified, obtained and understood.
  2. Established OHS risk control measures and procedures are followed in preparation for the work.
  3. Safety hazards, which have not previously been identified, are documented and risk control measures devised and implemented in consultation with appropriate personnel.
  4. The extent of faults is determined from reports and other documentation and from discussion with appropriate personnel.
  5. Appropriate personnel are consulted to ensure the work is co-ordinated effectively with others involved on the work site.
  6. Tools, equipment and testing devices needed to diagnose faults are obtained in accordance with established procedures and checked for correct operation and safety.
OHS procedures for a given work area are identified, obtained and understood.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Established OHS risk control measures and procedures are followed in preparation for the work.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safety hazards, which have not previously been identified, are documented and risk control measures devised and implemented in consultation with appropriate personnel.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The extent of faults is determined from reports and other documentation and from discussion with appropriate personnel.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Appropriate personnel are consulted to ensure the work is co-ordinated effectively with others involved on the work site.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Tools, equipment and testing devices needed to diagnose faults are obtained in accordance with established procedures and checked for correct operation and safety.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnose and rectify faults

  1. OHS risk control measures and procedures for carrying out the work are followed.
  2. The need to test or measure live is determined in strict accordance with OHS requirements and when necessary conducted within established safety procedures.
  3. Circuits/machines/plant are checked as being isolated where necessary in strict accordance OHS requirements and procedures.
  4. Logical diagnostic methods are applied to diagnose display circuits faults employing measurements of circuit operating parameters referenced to display operating specifications.
  5. Suspected fault scenarios are tested as being the source of display circuit problems.
  6. Faults in the electronic components of the display circuits are rectified to raise display circuits to its operation standard.
  7. Circuits are tested to verify that the display operates as intended and to specified requirements.
  8. Decisions for dealing with unexpected situations are made from discussions with appropriate persons and consistent with job specifications and requirements.
  9. Diagnosis and rectification activities are carried out efficiently without waste of materials or damage to apparatus and the surrounding environment or services and using sustainable energy practices.
OHS risk control measures and procedures for carrying out the work are followed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The need to test or measure live is determined in strict accordance with OHS requirements and when necessary conducted within established safety procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Circuits/machines/plant are checked as being isolated where necessary in strict accordance OHS requirements and procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Logical diagnostic methods are applied to diagnose display circuits faults employing measurements of circuit operating parameters referenced to display operating specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Suspected fault scenarios are tested as being the source of display circuit problems.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Faults in the electronic components of the display circuits are rectified to raise display circuits to its operation standard.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Circuits are tested to verify that the display operates as intended and to specified requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Decisions for dealing with unexpected situations are made from discussions with appropriate persons and consistent with job specifications and requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnosis and rectification activities are carried out efficiently without waste of materials or damage to apparatus and the surrounding environment or services and using sustainable energy practices.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete and report fault diagnosis and rectification activities

  1. OHS work completion risk control measures and procedures are followed.
  2. Work site is made safe in accordance with established safety procedures.
  3. Rectification of faults is documented in accordance with established procedures.
  4. Appropriate person or persons notified, in accordance with established procedures, that display circuit faults have been rectified.
OHS work completion risk control measures and procedures are followed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Work site is made safe in accordance with established safety procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Rectification of faults is documented in accordance with established procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Appropriate person or persons notified, in accordance with established procedures, that display circuit faults have been rectified.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

9) 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

9.1)

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 Industry-preferred 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 substance/material 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 how/how 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

9.2)

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 – UEE11’. 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 8) 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

9.3)

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 learning/assessment 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

9.4)

This unit shall be assessed by methods given in Volume 1, Part 3 ‘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 learning/assessment 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

9.5)

There are no concurrent assessment recommendations for 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.

Required Skills and Knowledge

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 diagnosing and rectifying faults in display circuits.

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

KS01-EH176A 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:

T1. Cathode ray tube displays encompassing:

Operation and characteristics of various types of cathode-ray tubes including delta, in-line and precision in-line

Voltages, statics and x-rays around CRTs

Set up and adjustment techniques

Rear and front projection TV systems

Typical faults

T2. Plasma displays and their circuit control operation encompassing:

Advantages of flat panel displays (over conventional CRT’s, Raster geometry etc)

Theory of plasma gas discharge and phosphor excitation

Scanning techniques (column/row addressing

Luminance/colour aspects (the need to re-address 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 non-linearity of light output of a conventional CRT)

Plasma flat panel construction (and handling)

T3. 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)

Voltage/current requirements and need for electric field

Fluorescent back light (need for high frequency operation and power requirements)

Scanning techniques (colour/row addressing and thin film transistors)

Light attenuation (caused by the many layers/filters the back light has to pass through)

Construction and handling

T4. Display circuit diagnostics encompassing:

Sub-system components (i.e. functional blocks) and their operating parameters

Factors effecting system performance

Typical faults, their symptoms and cause.

Fault diagnosis procedures and testing

Sub-system adjustments

T5. Advance electronic measuring instruments encompassing:

Test/measuring devices and their application - Examples are frequency counters, and synthesisers, spectrum analysers, noise and distortion meters and RF communications service monitor.

T6 Connection of test/measuring devices into a circuit encompassing:

safety procedures

loading and matching

storage and delay

circuit arrangement of test/measuring devices

T7 Taking and interpreting readings

T8 Notion of decibels including dBm, dBr, dBu, dBo

T9. 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.

Range Statement

10) This relates to the unit as a whole providing the range of contexts and conditions to which the performance criteria apply. It allows for different work environments and situations that will affect performance.

This unit shall be demonstrated using a representative range of display circuits by diagnosing and rectifying at least four circuit faults in two different types of displays.

Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated. The definition of these and other terms that apply are given in Volume 2, Part 2.1.