Design Information

This NEW Driver Board (a.k.a., Master Driver Board, Solenoid Driver Board, Lamp Driver Board) is designed to directly replace the existing Gottlieb Master Driver board. It will mount in the same location using the existing plastic standoffs, and all the connectors are the same. Some additional items to note are that all components,  transistors, resistors and IC chip reference designators (Q1, Q2, Z1, Z2, etc. ) are the same as the old board. (With the exception of a few new components.) Making identification easy.

Compatibility; This new driver board is compatible with the original Gottlieb Main Control Board, the Ni-Wumpf replacement CPU board, and with the Pascal PI-1 replacement CPU board. More information on these can be found at www.ni-wumpf.com or pascalpi1@aol.com or their website at www.flippp.fr also info here; www.pinball.ch/replay/pascal-pi-1.html

Design features of the board included, improved layout, new state of the art Darlington transistors to replace those old obsolete, over priced transistors (MPS-U45's). Dual transistor footprints that allow the use of older transistors (if for some reason you want to.) Thermal pads for the new transistors. Ground wire to correct ground reference problem with old driver board.

These boards have all NEW components! Remember, that used board on Ebay or a tested or reconditioned board you may find at a pinball sales web site is going to be 30+ years old, it's been used for many thousands of hours. It's life is almost up, or is going to be up shortly after you install it in your machine. Don't waste $50-$100 on a used board when you can get a BRAND NEW one! Electronic components do ware out, especially those transistor.  Have a spare on hand, or get one so that when your does go bad, you can install the NEW one and keep playing!!!

Troubleshooting Existing Boards

Our new driver board can correct problems ranging from dim lamps, not working lamps, not working chimes, or drop targets that won't reset. You can test some of these features with the self test mode on the CPU control board. See your manual for instructions on how to test the outputs of the driver board. If you find that some of your lamps still don't work even after you have replaced the lamp, the problem could be in the driver board. If your drop targets don't always reset, the problem could be a transistor on the driver board.

System 1 machines have been known to have problems with CPU boards that have leaky batteries that have caused corrosion to the cable between the CPU board and the driver board. You should check the pins on the connectors to see if any pins are broken, corroded or weak spring force. If you have replaced your CPU board with a new version because of battery corrosion, you should definitely check the connector pins. Order a new cable with our diver board.

 There is also some good information on connector problems located here: Connector Problems ( www.marvin3m.com/sys1/index.htm#connect )

An excellent web site that describes problems in great detail is www.PinballHQ.com.