This is advanced skilled technical work in the inspection, repair, installation and maintenance of train control equipment.

Employees in this class are responsible for inspecting, repairing, troubleshooting, installing and maintaining train control equipment on as assigned shift in a public transportation system. Work involves the advanced application of the principles and techniques of electrical and electronic repairs and adjustment to modern train control equipment including mini-bonds, rail connections, signals, track switching machines and motor circuit controls. Employees exercise some independent judgment in the various technical phases of repair, installation, modification and adjustment. Supervision is received from a technical superior who reviews work in progress and upon completion for satisfactory performance of equipment installed, repaired or maintained.

ILLUSTRATIVE TASKS

Performs preventive or emergency maintenance of train control equipment on an assigned shift.

Inspects, tests, troubleshoots, repairs and replaces mini-bonds and rail connections.

Inspects, tests, troubleshoots, repairs and replaces signals for dim-outs and black-outs.

Inspects, tests, troubleshoots, repairs and replaces track switching machines for loose and broken bolts and switch adjustments; adjusts track switching machines and motor circuit controls.

Inspects, tests, troubleshoots, repairs and replaces power frequency and loop track circuits for continuity of wiring.

Uses oscilloscopes and frequency counters to identify specific areas of deficiency; uses voltmeters to determine circuit trouble on hard-wire logic circuits.

Observes established safety practices and procedures applicable to the electrical trade and to work in a public transportation system.

Performs related work as required.

KNOWLEDGES, ABILITIES AND SKILLS

Considerable knowledge of the principles and theories of electricity and electronics as applied to train control equipment.

Considerable knowledge of the mechanical and electrical functioning of train control equipment.

Considerable knowledge of the standard practices, methods, tools and materials of the electronic trade.

Considerable knowledge of the occupational hazards and safety precautions of the electrical trade and of work in a public transportation system.

Knowledge of precision test equipment such as oscilloscopes and frequency counters.

Ability to diagnose and repair defects on hard-wire logic circuits.

Ability to diagnose and repair defects on audio frequency electronic track circuits.

Ability to read and understand the positioning of relays.

Ability to work a variety of hours and emergency shifts as required.

Ability to inspect, install, repair and maintain a variety of train control equipment.

Ability to follow verbal and written instructions.

Skill in the diagnosis of electrical and mechanical malfunctions.

Physical strength and agility sufficient to perform assigned duties.

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