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 finding and repairing faults in electronic apparatus. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EH118A Electronic apparatus fault finding and repair 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. Drawings and diagrams Drawing types and applications encompassing: Drawing layouts and conventions - mechanical drawings, electrical/electronic schematics, wiring diagrams, PC boards, location diagrams (architectural drawings), and cable routes and switching arrangements and building details. Drawing symbols - symbols representing electrotechnology circuit components, equipment location and cable routes and control arrangements. Freehand drawing Cable/wiring/connection and equipment/component/schedules. T2. Electronic testing and measuring devices and techniques Test/measuring devices and their application - analogue and digital multimeters, voltage and digital testers, signal generators and oscilloscopes Connection of test/measuring devices into a circuit encompassing: safety procedures circuit arrangement of test/measuring devices Taking readings Storage, maintenance and care of test/measuring devices T3. Electronic fault finding Factors to consider in clarifying the nature of a fault encompassing: Initial fault report Confirmation of symptoms of the fault Comparison of symptoms with normal operation Effect to cause reasoning — assumptions of possible causes Methods for testing assumptions encompassing: Visual inspection Sectional testing Split-half tests Component isolation Dealing with intermittent faults - causes of intermittent faults are vibration, shock, changes in temperature and electromagnetic interference. T4. Electronic Safe working practices Risk management and assessment of risk encompassing: Of the immediate environment Of the apparatus under repair Hazards associated with low-voltage, extra-low voltage and high-currents encompassing: Of the immediate environment Of the apparatus under repair Parts of an electronic systems and equipment that operate at low-voltage and extra-low voltage, Parts of an electronic systems and equipment where high-currents are likely. Risks and control measures associated with high-voltage encompassing: Of the immediate environment Of the apparatus under repair Parts of an electronic systems and equipment that operate at high-voltage, The terms used - ‘touch voltage’, ‘step voltage’, ‘induced voltage’ and ‘creepage’ as they relate to the hazards of high-voltage, and Control measures used for dealing with the hazards of high-voltage. Risks and control measures associated with low voltage encompassing: Risks associated with installation, fault finding, maintenance and repair. Control measures before, while and after working on electronic systems or equipment Isolation and tagging-off procedures. Risks and restrictions in working live. Control measures for working live. Safety, selection, use, maintenance and care of test equipment encompassing: Of the immediate environment Of the apparatus under repair Safety characteristics of electrical testing devices, Chemical cleaning solvents, glues and joining wastes used in electronics, Safe use of electrical testing device, and Checks and storage methods for maintaining the safety of testing devices. |