You can click on the image to see the full size view of the schematic which can be saved or printed.
Gottlieb system 1 power supply repair.
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The first picture below is the system 1 power supply with voltage notations plus other info.
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.
Untested gottlieb pinball system 1 power supply 12 21 2188 00 parts repair 1978.
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.
But it certainly is not perfect.
New design uses new components and runs much cooler.
The gottlieb system 1 power supply is a fairly robust device.
Heck it s not easy to work on either.
Power supply board overview.
A gottlieb system 1 power supply can be repaired refurbished for a only a few dollars in parts.
Gottlieb system 1 sound board original.
4 3 3 recommended power supply updates repairs.
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.