This unit involves the skills and knowledge required to troubleshoot digital sub-systems.

It includes working safely, applying problem-solving procedures, using measuring devices, and providing solutions from measurements and calculations to provide solutions in digital components circuits.

The skills and knowledge described in this unit require a licence or permit to practice in the workplace where work is carried out on electrical installations which are designed to operate at voltages greater than 50 volt (V) alternating (a.c.) or 120 V direct current (d.c.).

Competency development activities in this unit are subject to regulations directly related to licensing. Where a licence or permit to practice is not held, skills and knowledge described in this unit require a relevant contract of training, such as an Australian Apprenticeship.

Additional and/or other conditions may apply in some jurisdictions subject to regulations related to electrical work. Practice in the workplace and during training is also subject to work health and safety (WHS)/occupational health and safety (OHS) regulations.

Permits may also be required for some work environments, such as confined spaces, working aloft, near live electrical apparatus and site rehabilitation.

No other licensing, legislative or certification requirements apply to this unit at the time of publication.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare to troubleshoot digital sub-systems

1.1

WHS/OHS processes and workplace procedures for a given work area are obtained and applied

1.2

WHS/OHS risk control work preparation measures and workplace procedures are followed

1.3

Scope of fault is obtained from documentation and/or work supervisor to determine work to be undertaken

1.4

Advice is sought from work supervisor to ensure the work is coordinated effectively with others

1.5

Sources of materials required for work are determined in accordance with workplace procedures

1.6

Tools, equipment and testing devices required for work are obtained and checked for correct operation and safety

2

Troubleshoot digital sub-systems

2.1

WHS/OHS risk control work measures and workplace procedures are followed

2.2

Need to test and measure live work is determined in accordance with WHS/OHS requirements and workplace procedures

2.3

Circuits are checked and isolated in accordance with WHS/OHS requirements and workplace procedures

2.4

Fault finding of digital components is conducted using measured and calculated values of parameters in accordance with workplace procedures

2.5

Unplanned situations are dealt with safely and with approval of relevant person/s

2.6

Fault-finding activities are carried out efficiently without waste of materials or damage to apparatus, the surrounding environment or services using sustainable energy practices

3

Complete work and document troubleshooting activities

3.1

WHS/OHS work completion risk control measures and workplace procedures are followed

3.2

Worksite is cleaned and made safe in accordance with workplace procedures

3.3

Work completion is documented and relevant person/s notified in accordance with workplace procedures

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least two separate occasions and include:

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including:

using risk control measures

calculating parameters correctly and accurately

carrying out fault-finding activities without waste and damage to materials, apparatus, environment or services

checking and isolating circuits

dealing with unplanned situations safely and with approval of relevant person/s

determining sources of material required for work

measuring and calculating values of parameters in fault finding

obtaining and checking tools, equipment and testing devices for correct operation and safety

obtaining scope of fault from documentation and/or work supervisor

preparing to troubleshoot digital sub-systems

seeking advice from work supervisor to ensure work is coordinated

testing and measuring live circuits

troubleshooting digital sub-systems

using sustainable energy practices.

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

analogue and digital signals

binary addition and subtraction

combinational logic circuits, including logic gate types and characteristics, truth tables and logic gate operation

digital building blocks, including clocks, multiplexers and demultiplexers, encoders and decoders, counters, flip-flops, latches and registers

digital displays, including liquid-crystal display (LCD) and 7-segment

digital fault-finding principles

digital numbering schemes, including binary, hexadecimal, binary-coded decimal (BCD), American Standard Code for Information Interchange (ASCII) and Unicode

digital sub-system building blocks

electrostatic precautions when handling devices,

logic families (CMOS and transistor-transistor logic (TTL)), including comparisons, input and output types, unit load and noise margin

numbering systems, including conversions

principles of analogue-to-digital and digital-to-analogue conversion

problem-solving techniques

relevant checking and isolating circuit methods

relevant circuit measurements and parameter values calculations

relevant digital sub-systems

relevant industry standards

relevant job safety assessments or risk mitigation processes

relevant manufacturer specifications and operating instructions

relevant materials, tools, equipment and testing devices

relevant testing and measuring methods

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace instructions, policies and procedures, including handling sensitive electronic components

sustainable energy principles.

Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must occur in suitable workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated suitable workplace operational situations that replicate workplace conditions.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Resources for assessment must include access to:

a range of relevant exercises, case studies and/or simulations

relevant and appropriate materials, tools, facilities, equipment and relevant industry standards currently used in industry

resources that reflect current industry practices in relation to troubleshooting digital sub-systems

applicable documentation, including workplace procedures, equipment specifications, regulations, codes of practice and operation manuals.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Troubleshooting a digital sub-system must include the following:

at least three digital components/circuits or functions

at least three faults

Electrotechnology

Electronics and Communications