Credit display glasses differ between six- and seven-digit games
Six-digit games use an ordinary six-digit glass for credit/ball-in-play with two digits unused. Seven-digit games use a special four-digit glass for it, which is very hard to find.
Systems
Related tips
- Six and seven digit displays
- Six- and seven-digit score displays
- Seven-digit scoring on six-digit displays for green-ROM games
- Displays show only every other digit ("0_0_0")
- Ball and credit displays show only even numbers after header work
- Digits burning or faint on players 1 and 3 (or 2 and 4)
- Display driver board versions
- Upgrade R2/R5 and check R1/R4 in the display supply
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Three, Clay Harrell (pinrepair.com)