| 1 | 1a. Carry out fault diagnosis on communication-electronic systems | 1.1 | Work safely at all times, complying with health and safety and other relevant regulations and guidelines |
| 1.2 | Carry out all of the following during the fault diagnostic activity: • plan the fault diagnosis prior to beginning the work • obtain and use the correct issue of company and/or manufacturer’s drawings and maintenance documentation • adhere to procedures or systems in place for risk assessment, COSHH, personal protective equipment and other relevant safety regulations and procedures to realise a safe system of work • ensure the safe isolation of equipment • provide and maintain safe access and working arrangements for the fault finding/maintenance area • carry out the fault diagnosis activities using appropriate procedures • collect equipment fault diagnosis evidence from live and isolated circuits • disconnect or isolate components or parts of circuits, when appropriate, to confirm diagnosis • identify the fault and determine appropriate corrective action • dispose of waste items in a safe and ... |
| 1.3 | ... environmentally friendly manner and leave the work area in a safe condition |
| 1.4 | Carry out fault diagnosis on four communication electronic systems, sub-systems or assemblies to LRU level, at least two of which must be selected from group A. Note: Any of the items below can be identified as a system, sub-system or assembly in its own right. Group A - communication electronics • transmitters (such as HF, VHF, UHF, microwave transmitters) • transceivers (such as HF, VHF, UHF, microwave) • receivers (such as HF, VHF, UHF, microwave receivers) • signal processing (analogue) (such as radar anti-clutter, comms audio and AGC stages) • signal processing (digital) (such as digital MTI, multiplexers, AGC) • aerial systems (such as phased arrays, long wire, and parabolic reflectors) • transmission lines (such as optical fibres, co-ax, baluns, twin wire, ... |
| 1.5 | ... waveguide) • display systems (such as CRT, plasma, TFT, TV tab) • man-machine interface (such as IS/ICT equipment or peripherals: keypads, keyboards, microphones) • electro-optical systems (such as cameras, thermal imaging, targetting systems) • hydraulic-electrical systems (such as hydraulic motors, HSUs, and actuators) • cryptographic systems (such as data encryption and de-encryption) • built-in test equipment • data network systems (such as LANs, WANs) • data network interfaces (such as switch, router, bridging networks) • any other identifiable electronic system, sub-system or assemblies Group B - associated equipment • environmental control systems (such as temperature, humidity, vibration, shock, alarm and protection) • electromechanical systems (such as servos, motors, relays, complex switches) • power generation systems (such as ... |
| 1.6 | ... fixed/transportable ac/dc generators, batteries) • power distribution systems (such as single phase/3-phase distribution panels) • power supply control systems (such as voltage/current series/shunt regulator/stabiliser) • hybrid systems (such as ADC, DAC) |
| 1.7 | Find faults that have resulted in two of the following breakdown categories: • intermittent action/system failure • partial failure or reduced performance • complete breakdown |
| 1.8 | Review and use all relevant information on the symptoms and problems associated with the products or assets |
| 1.9 | Investigate and establish the most likely causes of the faults |
| 1.10 | Select, use and apply diagnostic techniques, tools and aids to locate faults |
| 1.11 | Collect fault diagnosis evidence from four of the following sources: • person or operator who reported the fault • test instrument measurements (such as wattmeters, multimeter, earth-loop impedance testers) • circuit meters (such as voltmeter, power factor, ammeter) • equipment self-diagnostics • recording devices • sensory (such as sight, sound, smell, touch) • plant/equipment records • condition of end product or output |
| 2 | 1b. Carry out fault diagnosis on communication-electronic systems (continued) | 2.1 | Use a range of fault-diagnostic techniques, to include two of the following: • half-split • injection and sampling • six point technique • equipment self diagnostics • emergent sequence • unit substitution • function/performance testing |
| 2.2 | Use a variety of diagnostic aids, to include two of the following: • logic diagrams • flow charts or algorithms • probability charts/reports • computer-aided test equipment • fault analysis charts • manufacturers’ manuals • troubleshooting guides • electronic aids |
| 2.3 | Use all of the following fault diagnostic procedures: • inspection • operation • measurement |
| 2.4 | Use four of the following types of test equipment to aid fault diagnosis: • oscilloscope • multimeter • logic probe • current tracer • signal generator • other specific test equipment |
| 2.5 | Complete the fault diagnosis within the agreed time and inform the appropriate people when this cannot be achieved |
| 2.6 | Determine the implications of the fault for other work and for safety considerations |
| 2.7 | Use the evidence gained to draw valid conclusions about the nature and probable cause of the fault |
| 2.8 | Record details on the extent and location of the faults in an appropriate format |
| 2.9 | Provide a record of the outcome of the fault diagnosis, using one of the following: • step-by-step analytical report • preventative maintenance log/report • corrective action report • company-specific reporting procedure |
| 3 | 2a. Know how to carry out fault diagnosis on communication-electronic systems | 3.1 | Describe the health and safety requirements of the area in which the fault diagnosis activity is to take place, and the responsibility they place on the learner |
| 3.2 | Describe the isolation and lock-off procedure, or permit-to-work procedure that applies |
| 3.3 | Explain how to recognise and deal with victims of electric shock (to include methods of safely removing victims from the power source and methods of first aid resuscitation) |
| 3.4 | Describe the importance of wearing protective clothing and other appropriate safety equipment during the fault diagnostic process |
| 3.5 | Describe the hazards associated with carrying out fault diagnosis on communication-electronic systems (such as mains electricity, stored capacitive/inductive energy, misuse of tools), and how to minimise them and reduce any risks |
| 3.6 | Describe the procedure to be adopted to establish background evidence of a fault |
| 3.7 | Explain how to evaluate the various types of information available for fault diagnosis |
| 3.8 | Explain how to use the various aids and reports available for fault diagnosis |
| 3.9 | Explain how to use various items of fault diagnostic equipment to investigate the problem |
| 3.10 | Describe the various fault finding techniques that can be used, and how they are applied (such as half-split, input-to-output, emergent sequence, six point technique, function testing, unit substitution, injection and sampling techniques, and equipment self diagnostics) |
| 3.11 | Explain how to evaluate sensory conditions (sight, smell, sound or touch) |
| 3.12 | Explain how to analyse evidence and evaluate possible characteristics and causes of specific faults or problems |
| 4 | 2b. Know how to carry out fault diagnosis on communication-electronic systems (continued) | 4.1 | Explain how to relate previous reports/records of similar fault conditions |
| 4.2 | Describe the care, handling and application of electronic test instruments (such as multimeters, logic probes, oscilloscopes, etc) |
| 4.3 | Explain how to determine the calibration state of the equipment, and the actions to be taken if equipment is out of calibration |
| 4.4 | Explain how to ensure that the equipment used is free from damage or defect |
| 4.5 | Explain how to obtain and interpret drawings, circuit diagrams, physical layouts, charts, specification, manufacturers’ manuals, history/maintenance reports, electronic/electrical symbols, and other documentation needed in the maintenance process |
| 4.6 | Describe the principles of how communication-electronic or associated systems function and interact |
| 4.7 | Explain how sub-systems and assemblies function within the system |
| 4.8 | Describe the purpose of each LRU within a given system |
| 4.9 | Explain how to evaluate the likely risk to themselves and others, and the effects the fault could have on the overall process |
| 4.10 | Explain how to prepare and produce a risk analysis report, where appropriate |
| 4.11 | Explain how to complete the necessary paperwork or take follow-up action, which satisfies the company policy on concluding fault diagnosis |
| 4.12 | Describe the extent of their own responsibility and to whom they should report if they have problems that they cannot resolve |
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