A12 transformer panel fuses F8 to F11

F8 10 A fast-blow, 6.3 VAC backbox GI; F9 7.5 A fast-blow, 6.3 VAC playfield GI; F10 and F11 3 A slow-blow, the two 12.6 VAC feeds to the A5 aux supply.

Systems

• Gottlieb System 3

Related tips

• DC supplies from the transformer panel
• Boots to game over, then lamps and switches are dead
• AC windings from the transformer
• Bulbs burn out fast: 110 V jumper plug fitted
• Erratic faults from a poor ground at the A18 board
• Which bridge rectifier is which
• Playfield GI out
• Backbox GI out

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