From Pinbits website.
The locking software is very sensitive to hardware errors in the game. A few typical malfunctions and their fixes are as follows:
Diverter does not load the ring when planet lock is available
- Check ramp entrance opto
- Check diverter
Multiball does not have all 6 balls
- Insufficient balls in the machine
- Trough divots holding up the balls (gently file and sand the trough ball lane to remove them)
- Bad opto transmitters or receivers in the trough (check trough optos in swicth test)
Game keeps shooting extra balls in multiball, and ends ball with balls still on the playfield
- Check crane exit opto
- Check that the ball exits through the crane exit opto
The crane opto has a relatively long gap; cleaning the transmitter and receiver can help.