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Williams System 11 CPU Board

  • Post author By pinheadspinball
  • Post date May 23, 2020
  • Categories In Board Repair

Issue: Client reports switch errors and solenoid issues. Diagnosis confirms bad special solenoid channels, bad switch input and control outputs.

Fix: Replace Q11 and Q12 with IRL530N.

  • Tags Special Solenoid, Williams System 11
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