Heck it s not easy to work on either.
Gottlieb system 1 power supply repair.
A gottlieb system 1 power supply can be repaired refurbished for a only a few dollars in parts.
Power supply board overview.
4 3 3 recommended power supply updates repairs.
I also include a pdf of the schematic.
New design uses new components and runs much cooler.
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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.
Gottlieb system 1 power supply schematic with voltages.
But it certainly is not perfect.
Remove the original power supply board from the heatsink plate and install this board using the same mounting holes and screws.
You can click on the image to see the full size view of the schematic which can be saved or printed.
In order to get to the solder side of the board to remove any suspect components the power supply must be taken apart.
New redesigned power supply for gottlieb system 1 plug and play.
The first picture below is the system 1 power supply with voltage notations plus other info.
The gottlieb system 1 power supply is a fairly robust device.