System 80 games have no surge protection on the line input

Power runs from the line cord to a line filter, a line fuse and outlet, then to two transformers. Unlike other makers, Gottlieb fitted no MOV on the line filter, so there is no surge protection.

The bottom panel carries 120 V AC from the wall; unplug the game before touching the line filter, fuse block or transformers.

Systems

• Gottlieb System 80
• Gottlieb System 80A
• Gottlieb System 80B

Related tips

• Quick diode test of a bottom-panel bridge rectifier
• Telling the logic filter cap from the coil filter cap
• Check the 80B bottom-cabinet 10,000 mfd filter capacitor
• Identifying the leads of a bottom-panel bridge rectifier
• System 80B ground lost at the transformer panel plugs
• First power-up, step 1: check the bottom-panel fuses
• Bottom-panel bridge rectifiers and fuses
• Game resets during play from a failing logic filter capacitor

Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part One, Clay Harrell (pinrepair.com)