System 11 switch matrix differences
System 11 has no help screens and an alphanumeric display, so you cannot see the whole matrix at once. Switches are numbered 1 to 64 and the number does not give the row and column; look them up in the switch matrix table.
Systems
Related tips
- System 11 switch matrix: connectors and chips
- How the Williams switch matrix is scanned
- Use the switch matrix table in the manual
- Entering the System 11 switch tests
- Testing the switch matrix with a logic probe
- Switch matrix resistor networks and their values
- How System 11 switch numbers map to rows and columns
- A bad SR14 can short switch rows on System 11A and later
Source: Pinball Machines: How They Work & Troubleshooting, Norbert Snicer