Stop trough optos from breaking with vibration

When replacing a trough opto, stand it slightly off the board and put a dab of RTV silicone behind it so vibration does not crack it. Rubber grommets under the board mounts may also help.

Systems

• Bally 6803

Games

• Blackwater 100
• Dungeons & Dragons

Related tips

• Get at the trough opto boards for testing
• NTE replacement emitters fit the opposite way round
• Trough opto numbering is backwards
• Dungeons & Dragons and Blackwater 100 use trough optos
• Fitting new trough optos on D&D and Blackwater 100
• Ball missing or balls stacking in the shooter lane

Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)