(Topic ID: 248433)

Tech - BSD Mist Ball

By PinballJeff

4 years ago


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  • 29 posts
  • 11 Pinsiders participating
  • Latest reply 4 years ago by ccbiggsoo7
  • Topic is favorited by 5 Pinsiders

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#1 4 years ago

Hello Crew,

Have a strange issue going on with my Mist Ball on BSD. The game has new long range optos that have been tested out on another game. Some work has been done to the 24 opto board and all seems to be working properly. My issue is in test mode "magnet" the game operates perfectly. Game will load the ball, take it back and forth just fine & runs the magnet unloaded fine. When I play a game and get mist ball, the ball will half way across the playfield and drop off the magnet. I've also noticed that while playing it will sometimes just release the ball out of the gate.

The game isn't showing a credit dot and nothing is coming up wrong in test mode. I've gone into switch edges and tested all the switches and found no problems. What's stumping me is why it works fine in test mode (have it probably 20 times and its never dropped the ball), but yet drops it 100% in game play. I've taken a magnet and drawn the ball from one side to the other in switch edge and it doesn't seem to have a dead spot coming across the playfield.

Anyone have any ideas why it works fine in test and doesn't work in game play?

Thanks in advance.

#6 4 years ago
Quoted from hawknole:

PM sent to OP as well. Agree opto boards could be culprit. What is the long range opto part number and where to source? I have been looking for a replacement.

https://www.amazon.com/dp/B06VY25N8J

#9 4 years ago
Quoted from Billc479:

Is adjustment A.2 - 42 magnet disable set wrong?

Can you elaborate? Not sure what you're talking about.

#10 4 years ago
Quoted from PinballJeff:

Can you elaborate? Not sure what you're talking about.

Received more feedback and this isn't the problem as it's loading the ball in the gate at start and holding there until mist ball begins. My understanding is if this is disabled it won't even load a ball.

It's just odd that it works perfect in test and does the consistent drop half way across in play.

#13 4 years ago
Quoted from Dirk:

I’ve had this issue over ten years ago. I dont have the photo anymore however i glued a half inch plastic tube (maybe shorter) onto the opto . This did the trick. The tube was the same daimeter as the opto on the left.

Thanks for the response. Was your issue that the ball would fall off half way across? I'm assuming that you mounted the plastic tube to the transmitter, not the receiver correct? I don't seem to have a switch not receiving issue as it works fine in switch edge and in magnet test.

Still stumped.

#15 4 years ago
Quoted from ryan1234:

While in switch test, try smacking the playfield down with your palm. My BSD worked fine in switch test and magnet test- only while playing the flippers/vuk/pop-bummpers would trigger the switch. I found that the long opto was just barely reading because it was not pointed straight. I shimmed it slightly down and has worked flawlessly for 4 years. Unfortunately this was after I bought a new opto board, new optos, ect, ect....
Good luck

Thanks Ryan. I'll give that a shot tonight.

#16 4 years ago
Quoted from ryan1234:

While in switch test, try smacking the playfield down with your palm. My BSD worked fine in switch test and magnet test- only while playing the flippers/vuk/pop-bummpers would trigger the switch. I found that the long opto was just barely reading because it was not pointed straight. I shimmed it slightly down and has worked flawlessly for 4 years. Unfortunately this was after I bought a new opto board, new optos, ect, ect....
Good luck

Tried the pounding on the playfield and there was no change on the status of switch 82. I'm thinking it might be an alignment issue.

#17 4 years ago

Is anyone aware, if I have an alignment issue and the as the ball is coming across and the receiver receives the signal from the transmitter - does that trigger the magnet to shut off?

#20 4 years ago
Quoted from Maurice:

I agree on this solution. If I remember correctly: from factory there could be 2 opto housings inline in the left magnet opto pocket. This does the same trick as quoted earlier.

The game currently has (2) receiver housings on the left side.

#22 4 years ago
Quoted from schudel5:

When the ball is knocked off the magnet, it shuts the magnet off and mist light off. I would assume it shuts the magnet off so the balls don't get reattached to the magnet as the carriage moves a across the playfield during multiball.

So this would probably point in the direction of an alignment issue then I'm guessing. I'm thinking somehow the receiver is getting the signal as the ball comes across the playfield causing it to release the ball.

1 week later
#26 4 years ago

Life has been a little busy, so I hadn't had a chance to do more testing until now. Quick recap - game is working just fine in magnet test and not showing a credit dot. In game play it would drop the ball as it crossed right to left.

I ended up mounting a tube on the receiver (left side) and the ball has no problem going right to left. Here's where it gets weird. When transferring ball from left to right, the ball will make it about 3/4 of the way and then it drops/falls off magnet. I've tried this 3 different days and it's always the same result - ball falls off on the return left to right. Even weirder, if the game has been turned on for awhile the game plays just fine (doesn't fall off at all). At least the three times that I've tried.

I thought about putting a tube on the transmitter. Any other thoughts out there?

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