AC windings from the transformer

Besides the bridge feeds, the transformer gives 95 VAC and 58 VAC to the dot matrix controller, 12.6 VAC to the A5 aux supply for the sound board's +/-12 V, and 6.3 VAC for general illumination.

95 VAC and 58 VAC are present on the display controller wiring.

Systems

• Gottlieb System 3

Related tips

• Bulbs burn out fast: 110 V jumper plug fitted
• Which bridge rectifier is which
• A12 transformer panel fuses F3 to F7
• A12 transformer panel fuses F8 to F11
• Boots to game over, then lamps and switches are dead
• Game won't boot: failed vertical fuse holder
• Erratic faults from a poor ground at the A18 board
• Playfield GI out

Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)