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Pin-Tek 3 opto PCB (also referred to as a ramp opto board) used on many Williams WPC pinball games
This opto ramp switch board assembly is a substitute for the following part numbers:
Reference:
Pin-Tek (PTK): PTK-13901
Bally (BLY): A-13901
Bally (BLY): A-17042
Williams (WMS): A-13901
Williams (WMS): A-17042
Williams (WMS): 5768-12686-00 pcb
Williams (WMS): 5010-12733-00 (3) resistor 220 ohm 1w 5%
Williams (WMS): 5040-12298-00 (1) capacitor 100M 40V-10+50 axial
Williams (WMS): 5370-12272-00 (1) LM339 quad comparator
Williams (WMS): 5791-12273-04 (1) 4h str sq lck .156
Williams (WMS): 5791-12273-05 (2) 5h str sq lk .156
Williams (WMS): 5791-12273-07 (1) 7h str sq lck .156