Reset Fix Board WPC Power Driver.

Plug in Reset Fix Board with voltage indicator LEDs for the Bally / Williams WPC pinball System part No. A-12697-1, A-12697-3, A-12697-4 power / driver boards.

The Reset Fix Board prevents and diagnoses intermittent game shutdown problems on Bally/Williams WPC (Williams Pinball Controller) System pinball machines. Easy plug and play, 5 minute, no tool installation.

How it works: When a game suddenly shuts off, goes dark and reboots itself after a few second delay, an MPU board reset has occurred. Unwanted resets occur on WPC pinball machine MPU boards because the Power Driver Board's (PDB) 5 volt power supply is marginally designed for the many circuits it drives.

The Reset Fix Board creates a unique 5 volt power source for the WPC System MPU board and adds 5v and 12v circuit monitor LEDs to your Power Driver Board.

WPC series MPU boards have a watchdog circuit that shuts down the board if the 5 volt power supply drops below a cutoff voltage (~ 4.7 volts). This happens more frequently as game circuitry ages, and the machine unexpectedly turns off and ends any active games. Ironically, the watchdog circuit shut down often reduces the 5 volt load, the voltage quickly recovers, and the machine restarts normally.

Unfortunately, the problem persists and re-energizing the MPU board quickly loads down the 5 volt power supply and the watchdog again resets the MPU. This creates an endless on/off reset cycle about every two seconds. Even if the machine doesn't enter this rapid "reset loop", there will be more intermittent resets - often within minutes, hours or longer intervals.

The Reset Fix Board eliminates watchdog circuit resets by removing the MPU load from the PDB 5 volt circuit and re-routing it to the more powerful 12 volt circuit. The Reset Fix Board omits connector pins from the wire-side connector and eliminates the PDB 5 volt connection to the MPU board. Instead, a new switched regulator circuit generates a stable 5 volt power supply used exclusively by the MPU board. This satisfies the watchdog circuit and the MPU board will not unnecessarily reset.