This board (MPU and Driver) is compatible with the Williams system 7 pinball machines.
It uses classical IC components with no-proprietary chips.
The board remains very faithful to the original one. Obsolete or fragile components have been replaced by more reliable components while keeping the same behaviour. There is no emulation or proprietary component, this board can be repaired in the same way as the original one.
It has one unique Game ROM that includes all Williams system 7 games.
2 LED indicators show the 5V voltage and the Blanking.
The reset circuit is reduced to only one component.
The board uses either a CR2450 battery or a 1F Capacitor
A special game program (Clear Memory) has been written in order to clear the Memory.
MOSFET transistor (more responsive, less heat)
Pinstar Test ROM
An advance TEST ROM for this W-Combo7 board.
6 fuses to protect the switch solenoids.