Williams WPC Driver Board

Issue: Client reports game resetting. Bench test of drive board shows the following voltages, all of which are OK.

  • TP1 = 12.6VDC
  • TP2 = 5VDC
  • TP3 = 12VDC
  • TP8 = 19.3VDC

Fix: Suspect bad grounding connection in game (screws, connectors, etc.) – replaced BR2, C5, and Q1 (with improved ground connection) anyways.