The TX vertical up-kicker looks as if its coil is trying to lock on: the plunger stays up after firing. A new coil did not change it.
TX scoop kicker plunger stays up as if locked on: magnetized plunger, worn sleeve
Cause: The fault was mechanical, not electrical: the plunger had become magnetized and was sticking in a worn coil sleeve, and the return spring was too weak to pull it back down.
Checks
- Switch the game off with the plunger up: if it still doesn't drop, the problem is mechanical, not a locked-on transistor.
- Check the coil sleeve and the plunger for wear, and the return spring for length and tension.
Fix
- Fit a new coil sleeve and a full-length return spring with more tension (replace the plunger too if it is magnetized or worn).
Systems
Games
Source: Pinball Repair help group!! (Facebook group)