Voltage Regulator for Williams WPC pinball games. TO3 case, 5 volt, 5 amp. The main cause of intermittent reset problems. Also used on older Bally/Williams power supplies. This fixes Intermittent reset problems in Twilight Zone, STNG and other over complicated pinballs made in the late 1990's. If flapping both flipper buttons fast causes a reset, you may need this. Check for loose diode on all flippers first. This replaces the 3 amp LM323K. Note: the 78H05 is no longer available as a new part. These are New Old Stock. There are many fakes on Ebay. We test them in our shop before selling them. The internal junctions are compared against a known good unit, with a Ring Tester on an oscilloscope. You can also find these in old Bally/Stern MPU type pinball machines, in the Solenoid/Driver board heat sink. The Bally stern games can operate on the LM323K, so swap them when you can.
Replaces - PN: E-00710 Bally MPU, PN: 5250-12634-00 Williams/Bally WPC