Use #47 bulbs, never #44, in these games
The #47 draws 150 mA against 250 mA for a #44. With around 75 bulbs in a game, #44s add roughly 50 W of load and heat to a power supply and connectors that are already stretched. Change every playfield bulb to #47.
Systems
Related tips
- A playfield target lamp never turns off
- Alltek lamp driver, one lamp dead: replace the bad SMD SCR with a 2N5064
- One controlled lamp dead even after a new SCR: lamp driver board fault
- Three playfield lamps never light though bulbs and wiring are good: bad SCRs
- Baby Pac-Man playfield GI never comes on for pinball mode
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part One, Clay Harrell (pinrepair.com)