1977 Satomi Sammy "Computer Pachinko" - Need parts!

[Brian3000]

I'm trying to repair this machine for a friend. This is my first pachinko experience. It doesn't keep score or payout when the blue Optosenser is connected. When I disconnect the sensor it does payout when I short the black wire to the blue wire, but it never keeps score. I need the Optosenser and possibly the circuit board.
Here are some pictures:
IMG_6901.jpgIMG_6902.jpg

Here's a post with the same problem: http://www.pachitalk.com/forums/vintage-pachinko/38550-older-satomi-sammy-pachinko.html
Here's some video link's to the exact same machine working properly: http://www.youtube.com/watch?v=Lwuz5j5aS3Q
http://www.youtube.com/watch?v=uwxQesuW03o

Please let me know if you have any parts or know where I can get them.
Thanks!