(Topic ID: 213254)

Opto 24-Switch PCB Assembly confrontation


By Pesmerga

2 years ago



Topic Stats

  • 8 posts
  • 4 Pinsiders participating
  • Latest reply 2 years ago by barakandl
  • Topic is favorited by 1 Pinsider

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There have been 5 images uploaded to this topic. (View topic image gallery).

BSD2.JPG
BSD1.JPG
SH BOM (resized).png
BSD BOM (resized).png
NBA BOM (resized).png

#1 2 years ago

Hello to everyone, my BSD opto board is suspected faulty and has some strange reparations from previous owners.
I wanted to fix it and looked on the manual BOM for indetifying the parts.

I have seen that also NBA fastbreak and shadow share this board with BSD but some resistor (see R9, R12, L1) values on the BOM seems to differ from manual to manual.

Is this some kind of update that bally/williams did to the board through the years?

what do you think? Which BO should i use for my final fix?

Thanks!

NBA BOM (resized).png

BSD BOM (resized).png

SH BOM (resized).png

#2 2 years ago

bump!

#3 2 years ago

might be different setup for BSD because of the long range opto?

Part numbers have unique suffix which might mean they are setup specifically for certain games.

#4 2 years ago

Check the schematic vs the parts list. I have found errors on the parts list before and tend to trust the schematic. On the resistors just decode the color bands and you'll know what's been installed. The inductor should be 10mh, not as it is labeled on the parts list.

#5 2 years ago

Here are photos from two different BSD 24-switch opto assembly boards. I agree with terryb in that I've seen errors or ambiguities in the parts list versus the schematic. The schematic is often (if not always) correct.

The schematic shows:

R9=470 1/2W
R12=10 (1/4W)
L1=10mH

On the board (if I interpret the colors correctly):

R9=470 1/2W
R12=0 (1/4W)
L1=?? (I don't have enough electronics knowledge to be able to figure this out)

Hope this helps.

BSD1.JPG

BSD2.JPG

#6 2 years ago
Quoted from DumbAss:

Here are photos from two different BSD 24-switch opto assembly boards. I agree with terryb in that I've seen errors or ambiguities in the parts list versus the schematic. The schematic is often (if not always) correct.
The schematic shows:
R9=470 1/2W
R12=10 (1/4W)
L1=10mH
On the board (if I interpret the colors correctly):
R9=470 1/2W
R12=0 (1/4W)
L1=?? (I don't have enough electronics knowledge to be able to figure this out)
Hope this helps.

The greasy spot around your C7 makes me think it might be leaking. I had a few opto boards in my BSD with leaking caps.

#7 2 years ago
Quoted from barakandl:

The greasy spot around your C7 makes me think it might be leaking. I had a few opto boards in my BSD with leaking caps.

Hmmm. That BSD does have problems with the long beam opto. Reports interference in the test. I haven't bothered to diagnose it further but this might very well be a starting point and (relatively) easy to fix.

Thanks!!

#8 2 years ago

103 inductor code would be 10,000uH or 10mH

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