(Topic ID: 203064)

Black Hole startup issues

By itsab67

6 years ago


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  • 41 posts
  • 6 Pinsiders participating
  • Latest reply 6 years ago by itsab67
  • Topic is favorited by 5 Pinsiders

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#6 6 years ago

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.

#8 6 years ago

Yes, 99 means that all swithes are open, but you need to verify if the SW25 is correctly detected:
- remove the apron to access to the charger.
- remove the three balls, so that, you can see the SW25 located under the charger.
Now enter the switch test mode and manually press the SW25 switch. If it is detected the display should show "25". Release the switch and the display will show "99".
If SW25 is not detected, the problem is mainly mechanical. Check the switch itself and the wire that press on it.

If the SW25 is well detected, then the problem is the solenoid command itself.
As F16 fuse is OK, in this case, the source of the problem can be transistor on the driver (command of L15 lamp) or the underplayfield transistor (Q2).

#15 6 years ago
Quoted from itsab67:

ok, so i attempted to follow your last instructions tonight. i turned on the game and ran a switch test expecting to see 99 like before, instead it said 4 and 15.

Don't worry, it may be normal.
When you launch the test mode, the pinball is frozen : if a ball stay in the outhole, it is not ejected, and if a drop target is downed, the bank is not reseted.
So you can have some drop target detected (the contact is maintained, as long as the target is down).

On BH, the SW04 is the "left #4 drop target 'C' " so, if this one is down it is detected !
The SW15 is the "outhole", so if a ball stay in it, it is also normal.

The switch matrix can indeed have a problem, but usually, a full row or column fail and not only one or two contacts. So, I doubt that the issue is a switch matrix on the CPU board.

#24 6 years ago

As ChrisHibler said, I'm affraid that something is burned on your CPU board. Note that, the switch matrix is directly connected to the CPU board, using the A1J6 connector and don't use the driver board. If you have re-seated the A1J6, then a bad contact can be exclude.

I think that the issue is not with rows, but columns (returns).
Considering that SW15 and SW25 are not responding, the return signal R5 is probably out. Using the test procedure, check if the SW35 - "RIGHT RETURN ROLLOVER" is detected or not. If not, sure that the R5 is faulty.

On the CPU board, the R5 signal arrive at pin 15 of A1J6. Then it enter a 7400 IC (Z14) and a RIOT (U4).
Most of the time, the problems with the switch matrix are cause by high-voltage entering the logic circuits and destroying them (no more than 7 volts allowed here). This may happen when the switch are located near a coil, and when the 24v is accidentally connected to the matrix.
matrix2.jpgmatrix2.jpg
Usually, only the 7400 burn and not the RIOT (U4). But sometimes, both burn.

If you have some skill in electronic, you can try to replace the Z14 by yourself. Of course, the IC must be replaced and mounted on a socket. It is not very complicated, but you have to be very careful because it is easy to damage the board.
Otherwise, it is best to have your card tested by a professional and have it repaired.

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