Double EOS switches drive the upper flipper

Where one cabinet button runs a lower and an upper flipper (such as the lower right and upper flipper on Eight Ball Champ), the lower flipper has two EOS switches. The normally closed one works as a normal EOS; the normally open one closes at the end of the lower flipper's stroke and only then lets the upper flipper's power winding energize. This saves current at the transformer.

Systems

• Bally 6803

Games

• Eight Ball Champ

Related tips

• Upper right flipper completely dead: failing EOS switch
• One flipper sometimes locks on: cabinet switch contacts pitted and sticking
• Keypad keys are switch matrix crossings
• No ball served and flippers dead after start: tilt switch closed, tilt lamp out

Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)