(Topic ID: 32480)

Gottlieb System 80b MPU question SOLVED

By Natetheviking

11 years ago


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#4 11 years ago

If you don't have significant experience repairing boards with delicate traces, you should strongly consider sending it to a pro.

What you are seeing is most likely flux residue. Since you've already identified pulled traces, the job will be a bit tougher than normal. I absolutely love this reproduction board from GPE...
http://www.greatplainselectronics.com/proddetail.asp?prod=140-101

The reason I like it is that you can solder two quality machine pin sockets into the U2/U3 position while attached to the repro board. This ensures that the pins line up. The repro board is engineered to include redundent connections between all of the pins possible. Awesome product.

If you want the board repaired professionally, I can take care of that for you. I've done dozens of these, along with just about any other pinball circuit board. Send a PM if you'd like me to help.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#6 11 years ago

Yes. From the factory, it was soldered to the main board. Is your daughter card in a socket?
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#10 11 years ago
Quoted from Natetheviking:

I'm not entirely sure how to answer this. Yes, it plugs into something that holds it into place on the board. It's seems like a loose fit. Do you mean that the socket would be a post-factory modification?

Post a picture of where the daughter card meets the main PCB. Do it's legs solder to the board, or do the legs insert into a socket?
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#14 11 years ago

That's a hack.
Clean that up with one of Ed's repro boards.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

2 weeks later
#16 11 years ago

Thanks for closing the loop. Nice to see another pin brought back!
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

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