This unit describes the knowledge and skills required to conduct fault finding and repairs to the simulator image generator and visual display systems. This includes analysing fault reports, identifying and rectifying faults, conducting functional tests and the documentation and certification processes. In the context of this unit, simulators are used to replicate land, air, sea and undersea systems to facilitate training and development. Both software and hardware components may be involved. Image generator hardware components include commercial off-the-shelf systems, proprietary designed systems and high-end rack mount personal computers with engineering graphic cards installed. Image generator software components include proprietary software to process visual databases stored on the information gateway, under direction of simulators’ host computing system, to produce drive signals for the visual display, and/or commercial software.Maintenance tasks include fault finding hardware to line replacement at unit level, image and backup of software installation, configuration and updating.Visual display systems include liquid crystal display, digital light processing, liquid crystal on silicon, light emitting diode, organic light emitting diode, cathode ray tube and/or laser.Mechanisms include projection (direct and/or rear, including optics and display surfaces), and/or direct display (television, monitor). Maintenance tasks may include setup, fault finding, alignment of projectors, optics alignment and colour matching and balance.This unit was developed in a Defence environment but may be relevant to others who work in this field. The skills and knowledge described in this unit must be applied within the legislative, regulatory and policy environment in which they are carried out. Organisational policies and procedures must be consulted and adhered to.Those undertaking this unit would work independently, or as part of a team, with minimal supervision, while performing complex tasks, including complex problem solving, in a limited range of contexts. They would use discretion and judgement and take responsibility for the quality of their outputs.No licensing, legislative or certification requirements apply to this unit at the time of publication.