This board is a complete redesign of the 10 opto switch PCB used on many Williams WPC pinball machines.

Revolutionary technology that reduces power consumption by over 65% Less heat and better efficiency will improve the longevity of your optos! Full LED diagnostics for all ten IR transmitters and receivers will help you track down faulty optos or intermittent wiring harnesses. Auxillary 12V power port for your game mods! No more hacking! NEW! Improved LED diagnostics now detects ground shorts and opto sensor overloads!

Older version of product shown below.

Below are a couple of pictures from a Revenge From Mars with the new board installed. Note that in the bottom picture, there are a few LEDs off. The bottom red and green LEDs are off because one switch isn't used (note the empty connector on the right). The other 4 green LEDs that are off are the receivers for the ball trough.

Below is a picture of the OSB-10A in a Bally Corvette. Note that all 10 opto switches are used!

Watch a video of the new board in action! As each opto switch is triggered, the opto receiver's LED will go out. Hover over image below for play controls.

Great Lakes Modular offers a 6-month limited warranty for this product against all workmanship defects! This warranty does not cover any damage caused from installation, modification, or use!

Liability Information

This product was designed as an aftermarket retro-fit into specific pinball machines only! Because Great Lakes Modular has no control over the conditions surrounding the installation and use of this product, the end user shall assume all liability and agrees to fully indemnify Great Lakes Modular and its agents, for any and all damages resulting from the installation and/or use of this product.

Should you encounter any problems with the opto board, please email us first! We will try to help as best we can to get the board installed and working!