Fit 6 A diodes at CR5-CR8 on the -54 module
The -54 power module's CR5-CR8 can be upgraded from 3 A to 6 A diodes, as on the -132, for better heat handling.
Systems
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part One, Clay Harrell (pinrepair.com)