We followed Taxi playfields as they advanced on conveyor belts and rollers along the playfield wiring assembly line. Technicians stood on both sides, ready to position stripped wire ends on lamp, switch, relay, or solenoid terminals, and solder the wires into place. Adjustable overhead vents sucked the dangerous solder fumes away from the area.

The playfield wiring section appeared to be the most labor intensive part of the Williams pinball machine factory. A playfield contains scores of electrical components and each requires at least two wires soldered on. I estimate that a playfield requires about 200 solder joints. There was no automation nor repetitive production of identical parts here. Instead, many skilled technicians carefully hand wired each playfield.

Near the end of the assembly line, a few playfields awaited repair after failing a quality test.

Our next stop was the cabinet assembly section.