IC37 on the System 7 CPU board is a resistor pack
IC37 looks like a chip but is a 16-pin DIP resistor network. Documents disagree on its value (10k on the Black Knight drawing, 4.7k on the schematics); if it ever needs replacing, use a 4.7k 16-pin DIP resistor pack.
Systems
Related tips
- Identifying a System 3 to 7 CPU board
- System 7 CPU board test points
- A System 7 CPU board can run any System 3 to 7 game
- Run a System 6/7 CPU board on +5 V only
- Which CPU boards can run which system firmware
- System 7 CPU ROM sockets
- System 7 CPU jumpers that are the same on every game
- Obsolete chips on System 3 to 7 CPU boards
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Three, Clay Harrell (pinrepair.com)