Gottlieb System 1 Power Supply Repair

Power supply board overview.

Gottlieb system 1 power supply repair.

The gottlieb system 1 power supply is a fairly robust device. Remove the original power supply board from the heatsink plate and install this board using the same mounting holes and screws. New redesigned power supply for gottlieb system 1 plug and play. New design uses new components and runs much cooler.

Untested gottlieb pinball system 1 power supply 12 21 2188 00 parts repair 1978. But it certainly is not perfect. However it is one of the trickier boards to work on because of the way the regulator is mounted through the heatsink and onto the pcb. In order to get to the solder side of the board to remove any suspect components the power supply must be taken apart.

A simple cure for the system 1 and 80 x regulator supply ground problems is to connect the ground plane of the regulator circuit board to one or two of the studs that the securing screws use to hold the circuit board to the regulator s heat sink and then making sure that the heat sink frame is connected to the cabinet ground plane. The first picture below is the system 1 power supply with voltage notations plus other info. 4 3 3 recommended power supply updates repairs. I also include a pdf of the schematic.

Gottlieb system 1 sound board original. You can click on the image to see the full size view of the schematic which can be saved or printed. Heck it s not easy to work on either.