Hi,
If I understand correctly, the outhole ejector works well (sol #9), but then the balls are stuck in the charger, right?
OK. On the black hole, the balls are stored in the charger. Basically, the outhole should be always empty. As soon as a ball is detected by the SW15 (outhole contact), it is ejected to the charger using the solenoid #9 (protected by the F15 fuse).
This can be checked using the solenoid test.
The balls then, remains in the charger, as they are locked by the ball release gate ("Wireform ball gate"). When this gate open, it release a ball that roll by gravity to the launcher lane.
At game start, a startup sound is played, then the "Wireform ball gate" is activated to release one ball.
The "3rd position ball return" switch (SW25) is checked to verify if the ball has been released. If not, it try again and again. The CPU program wait until the ball is released, and then play another sound (backgound/music).
So, it appear that the ball release system doesn't works. You have the first sound, but as the ball remain locked, the process loop infinity and never play the background music. Two possibilities for this issue:
- Either the 3rd ball position is not detected - in this case check the SW25 contact - can be done using the SW test.
- Either the solenoid is not activated.
The "wireform ball gate" solenoid is driven by a lamp (L15) and a transistor located under the playfield (Q2 - 2N5875), protected by a fuse F16. This cannot be tested using the sol. test, as this one use a lamp to command the coil.
So, first check the F16 fuse (1A SB), may be this one is burned.