What happens when the T relay pulls in
On a tilt the T relay lights the backbox Tilt lamp, switches off playfield GI and removes all playfield coil power, so the ball drains. When the outhole switch closes the CPU drops the relay and play continues.
Systems
Related tips
- What the Game Over (Q) and Tilt (T) relays do
- What the Q relay contacts switch
- None of the CPU controlled lamps light
- Pop bumper or slingshot locked on or dead
- How the Tilt and Game Over lamps are switched
- No CPU controlled lamps light
- Backbox or playfield GI always off
Source: Gottlieb System 1 Pinball Repair from 1977 to 1980, Clay Harrell (pinrepair.com)