An upgraded -18 supply can replace a -49 in a pinch
After the upgrades, a complete -18 supply (transformer included, not just the rectifier board) can run a game meant for the -49; the plugs fit, with the -49 housing's extra J1 pin hanging past the header. Not recommended except as a stopgap.
Systems
Related tips
- Checking the pre-Xenon supply with the game unplugged from it
- How the pre-Xenon power supply works
- Route of the +12 V supply to the MPU and 5 V regulator
- Where the 43 V solenoid supply leaves the rectifier board
- Solenoid driver TP5 under 13 V
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part One, Clay Harrell (pinrepair.com)