How System 11 switch numbers map to rows and columns
Switches are numbered 1 to 64 in column order: switches 1-8 are column 1 rows 1-8, 9-16 are column 2 rows 1-8, and so on to 57-64 in column 8. Unlike WPC, the number does not spell out the row and column digits.
Systems
Related tips
- A bad SR14 can short switch rows on System 11A and later
- Using the System 11 switch tests
- System 11 switch matrix differences
- Row or column error: CPU board or playfield?
- Testing the switch columns with a clip lead
- Testing the switch rows with a clip lead
- A whole switch row or column is dead
- System 11 switch matrix: connectors and chips
Source: Repairing Williams System 11 Pinball 1986 to 1990, Part Three, Clay Harrell