Every CPU controlled lamp is dim.
All CPU controlled lamps are dim
Cause: The lamp bridge rectifier is weak.
Fix
- Replace it with a 35 A lug bridge (MB3502 or MB3504).
The bottom panel carries 120 volt line power; unplug the game before touching the transformers, line filter or fuse block.
Systems
Related tips
- None of the CPU controlled lamps light
- How CPU-controlled lamps are driven
- Coil, CPU lamp and GI supplies
- Backbox or playfield GI always off
- Bottom panel fuse keeps blowing
- Spare diodes, capacitors and other parts for System 1
- What is on the System 1 bottom panel
- How power reaches a System 1 game
Source: Gottlieb System 1 Pinball Repair from 1977 to 1980, Clay Harrell (pinrepair.com)