Which bridge rectifier is which

On the transformer panel the bridge nearest the front feeds the solenoids, the middle one the 20 V lamp matrix, and the rear one the 12 V that becomes +5 V. The big blue 33,000 uF cap filters the 20 V lamp supply; the short black 10,000 uF cap filters the logic supply.

Systems

• Gottlieb System 3

Related tips

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

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