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"Rio" is an electro-mechanical pinball machine released by Playmatic in June 1977. Designed for up to four players, it features three flippers, two pop bumpers, two slingshots, nine standup targets, a captive ball mechanism, and a kick-out hole.
We don’t have rules or a tutorial for Rio yet.
On the floor at 1 location
Rectifier voltage table at 32, 30 and 28 V
Four layout views plus relay function table
Score thresholds up to 900,000 with wire color pairs
Switch diagrams for 1-coin and 2-coin setups
Jumper settings for 1 to 9 on relays D and B
Written step-by-step of relays, switches and cam contacts
Annotated playfield photo, shared with Carnival
Cams 1 to 7 with index and impulsion tracks
Redrawn in 2008 with CD4069 stages and output transistors
Large-format 4-player sheet with relay and coil tables
