Special Solenoid Saver Board with LED indicators - Version 4.1 Williams Sys 9-11, Data East, Sega Header Height:Standard 18mm header always verify that board components—especially

always verify that board components—especially the transistors—are not dead-shorted

or slingshot

even if it's the IDC type

Volume control is scratchy

1/4W resistors

Special Solenoid Saver Board with LED indicators - Version 4.1 Williams Sys 9-11, Data East, Sega Header Height:Standard 18mm header always verify that board components—especiallySpecial Solenoid Saver Board version 4. 1 ***Note*** The Williams System 3 7 requires the 30mm variant Functionally identical to version 4. 0, but a bit more streamlined The Special Solenoid circuit is protected by a single, 4A fuse. If a switch that drives a Special Solenoid gets stuck on, that corresponding coil locks on, and heats up. After several minutes, the coil gets so hot, that the insulation around the winding begins to burn and the coil