Replacement bridge rectifiers

The original VARO VK438 or VL038 bridges are obsolete. Use a 35 amp lug-lead bridge such as an MB3502 (200 V) or MB3504 (400 V); higher amp or volt ratings are fine, lower are not.

The bottom panel carries 120 volt line power; unplug the game before touching the transformers, line filter or fuse block.

Systems

• Gottlieb System 1

Related tips

• Choosing replacement bridge rectifiers
• Lowering GI voltage with a bridge rectifier
• Transistors, diodes and chips to keep for CPU and driver repairs
• No or low +5 V from the power supply
• A bottom-panel fuse blows the moment the game is switched on
• Spare diodes, capacitors and other parts for System 1
• What is on the System 1 bottom panel
• How power reaches a System 1 game

Source: Gottlieb System 1 Pinball Repair from 1977 to 1980, Clay Harrell (pinrepair.com)