System 6/7 speech boards take 2532 EPROMs
System 9 speech boards look the same but are jumpered for 2732 EPROMs; System 6 and 7 speech boards use 2532s.
Systems
Related tips
- System 6/7 sound and speech board ROMs
- Sound and speech board sockets need checking too
- Recapping the speech board: C26 really is fitted the 'wrong' way round
- Sound effects work but speech is missing or very quiet: replace the speech board op amps
- System 9 sound and speech boards fit System 6/7
- System 6/7 sound board can take a 6802 in place of the 6808 and 6810
- No speech? Check the speech board pot
- Setting up a sound board for speech
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)