Hello All,
I was playing my Pinbot the other day when I smelled a little smoke so I shut it down and opened up the head cabinet and the wires had gotten a little crispy around the lower board rectifier.

Looking at the where the wires run, it looks like they run down to the power supply. The rectifiers, capacitor and the power supply are original.

My question primarily is have any of you experienced this with your machine? And what was the culprit/where should I be looking? I'm somewhat new to pins but have a technical background in cars and electronics.

Thank you in advance for your help.

BTW, Having read a little on the topic now, I plan to add some inline fuses to each of these rectifiers to prevent this kind of wire melting fire hazard. https://creditdotpinball.com/2014/04/21/mods-fireproofing-pinbot-and-other-early-system-11-games/

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For sure it could have been worse. I was lucky enough to have been standing there and smelled the wiring almost immediately and shut the system down.

I'd like to replace both the bridge rectifiers with these bridge boards mentioned in this thread. What I'm not sure of is the capacitor. Does this come with the updated bridge boards or is this a second component?

Also thanks to everyone for the speedy replies.

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Actually I found my answer in this doc: http://home.kpn.nl/p.koch3/Inkochnito_Bridge_Board.pdf

They are built onto the boards.

Well the rectifier board is in place but sadly upon further inspection it looks like the brown wires beyond the connector got crispy in some areas too. I'm thinking I'm going to have to rebuild harness from the from the connector up by the bridge board all the way down to the power supply.

Is there anyone in the community who builds harnesses? That would be my first choice. Alternatively, I'd also appreciate any advice on the rebuilding process or where specifically to source the parts.

Thanks everyone.