Balboa GS501Z Printed circuit board.
Looks different to original PCB from the SCS501 controllers but still fits and has the same functions.
PCB can have the following set up functions:
1.
1x Circ Pump, 1x 1 Speed Pump, 1x Blower, Ozone, Light.
2.
1x 2 Speed Pump, Blower, Light, Ozone.