(Topic ID: 278370)

BSD - Confusing Problem - Ballsearch, Opto-error

By Saddath

1 year ago


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  • 14 posts
  • 2 Pinsiders participating
  • Latest reply 1 year ago by PinballManiac40
  • Topic is favorited by 2 Pinsiders

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#1 1 year ago

Ok I'm kind of stuck with getting my BSD back to working and hoping for the pinside hivemind to come up with some ideas.
First of I'm still learning the ropes of repairing games. So i might need some further help as I can not 100% read and understand the schematics.

Ok what has happened and what has been done so far in a short summary:

- Working BSD was in Attract mode. Suddenly a ballsearch went off with solenoids firing and it smelt burned.
-> Machine turned off.
- When turning back on again, ballsearch goes on and the game is showing error on the optos #53 Top right Lane and #73 L Ramp entry
- Found a burnt C10 condensator on my 24 Switch opto assembly.
-> Replaced C10 and C7 with new condensators
-> Problem remains
- Noticed acid damage on the CPU from a former Battery damage (Has been this way when bought, had no clue what to look for back then, BSD worked for a year with it up to the problem)
-> Replaced almost all of the components of the CPU from the height of U12 downwards including IC's Resistors, diodes etc.
- Furthermore I noticed the missing LED light on 24 switch opto assembly, found a blown F116 fuse
-> Replaced fuse, Problem remains.
- Tested the switch Matrix on the CPU with a jumper cable from J207 to J209.
-> All switches showing off correctly
- Run a switch test on the game with everything plugged in
-> All switches register normally. I can even open and close switch #53 T R lane and #73 L Ramp entry. So I got no clue why I still get them as an error message.

This is about it. Any ideas or help for a fellow beginner

#2 1 year ago

Good work so far, especially with rebuilding the MPU. I suggest upgrading to 6264 NVRAM to remove the batteries forever.

Quoted from Saddath:

- Found a burnt C10 condensator on my 24 Switch opto assembly.
-> Replaced C10 and C7 with new condensators
-> Problem remains

This same thing happened to mine. Did you repair the damaged traces to the solder leads of both C7 and C10 capacitors on both sides of the board? Without the LED being lit, power will not get to the LM339 parts.

The electrolyte that leaks from these electrolytic capacitors is just as bad as the alkaline leakage from alkaline batteries. In both cases it eats up traces. The burning smell was the capacitor when the electrolyte crossed between the + and - shorting out the capacitor.

#3 1 year ago
Quoted from PinballManiac40:

Good work so far, especially with rebuilding the MPU. I suggest upgrading to 6264 NVRAM to remove the batteries forever.

This same thing happened to mine. Did you repair the damaged traces to the solder leads of both C7 and C10 capacitors on both sides of the board? Without the LED being lit, power will not get to the LM339 parts.
The electrolyte that leaks from these electrolytic capacitors is just as bad as the alkaline leakage from alkaline batteries. In both cases it eats up traces. The burning smell was the capacitor when the electrolyte crossed between the + and - shorting out the capacitor.

Thanks. Was my first solder job on boards but I'm pretty sure it turned out good.
I made an external battery holder that is placed on the side of the backboard.

Damn I'm sure I checked the leads on one side. But not sure if on both (edit: I checked pictures. Should be ok damage was not that big, pic attached)

The LED is lit on the 24 switch opto board after changing F116.

IMG_20200727_131524 (resized).jpgIMG_20200727_131532 (resized).jpg
#4 1 year ago
Quoted from Saddath:

The LED is lit on the 24 switch opto board after changing F116.

Ok. Good. That is not how it read to me at 2am after a bathroom wakeup call.

I will have to review your notes again tomorrow.

#5 1 year ago
Quoted from PinballManiac40:

Ok. Good. That that not how it read to me at 2am after a bathroom wakeup call.
I will have to review your notes again tomorrow.

No Problem. Appreciate your help. Have a good sleep.

#6 1 year ago

My game has been working for 2 months now once I got my 12V power rail returned to the switch opto board.

You recently posted a picture which looks like the mist motor board to me. Were you calling this the 24 switch opto board?

Did you already fix this issue on that board?

Screenshot_20200930-033300_Samsung Internet (resized).jpg
#7 1 year ago

I am a bit wired since waking up so I could not resist responding. Haha

#8 1 year ago
Quoted from PinballManiac40:

My game has been working for 2 months now once I got my 12V power rail returned to the switch opto board.
You recently posted a picture which looks like the mist motor board to me. Were you calling this the 24 switch opto board?
Did you already fix this issue on that board?
[quoted image]

Yes this is the 24 switch opto board acrding to the manual and that was what I was referring to.

There i changed both capacitors and got the LED back on. But still got the ballsearch and switcherrors.

#9 1 year ago

That's right. It is definitely for the mist optos, not for the motor as I was originally thinking.

I think you may want to do a factory reset to clear out the error messages and retest

The C1 was the capacitor that leaked and burnt on the 7 opto board in my game. I think you should replace it as well since it will be a matter of time. When C1 leaked, it ate up part of a trace under it. I need to see if I still have pictures of it.
Screenshot_20200930-034731_Hancom Office S Viewer (resized).jpg

#10 1 year ago

C2 on the power driver board is the other capacitor that likes to leak as well.

#11 1 year ago
Quoted from PinballManiac40:

That's right. It is definitely for the mist optos, not for the motor as I was originally thinking.
I think you may want to do a factory reset to clear out the error messages and retest
The C1 was the capacitor that leaked and burnt on the 7 opto board in my game. I think you should replace it as well since it will be a matter of time. When C1 leaked, it ate up part of a trace under it. I need to see if I still have pictures of it.
[quoted image]

Ok will change this one too. Has the same specs as the others.
Will also check C 2 on the PDB

I will report back some time later when I did a reset.

#12 1 year ago

You can go higher on the voltage rating. Just remember, the higher you go, the larger the capacitor is and the lead spacing may also increase.

#13 1 year ago
Quoted from PinballManiac40:That's right. It is definitely for the mist optos, not for the motor as I was originally thinking.
I think you may want to do a factory reset to clear out the error messages and retest
The C1 was the capacitor that leaked and burnt on the 7 opto board in my game. I think you should replace it as well since it will be a matter of time. When C1 leaked, it ate up part of a trace under it. I need to see if I still have pictures of it.

Ok did a factory reset game starts up normal now.

Wow. If it was really that...

#14 1 year ago

Guess we will see if any of it returns. Hopefully not.

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