The Summer of Chuff 2015

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wp34:

--- Quote from: harveybirdman on May 26, 2015, 07:18:47 pm ------smurfing--- rain!

Humidity is the devil when you want paint to dry. The only thing keeping me going is the payoff of posting the final results here.

--- End quote ---

Dude you are so right. I didn't wait long enough to sand and ruined a long-weekend's worth of painting. :banghead:

yotsuya:
As the Summer of Chuff begins, I've started a minor project, but one I really want to see to fruition. I bought a non-working NHL Open Ice board running on a Midway Wolf Unit board. Open Ice is a pretty hard to find board, and I got a good deal on it, but once I got it, I could see what the issue probably was - corroded sockets. The blue-green corrosion could be cleaned off of chips, but the sockets were a different story. I removed the EPROMS to do a rom swap with a UMK3 board that I had for testing purposes, and it was clear that the sockets were so badly corroded that they caused some of the legs on the EPROMS to break off. I loaded the roms on my UMK3 board and saw that there were issues, but at least they booted. The NHL board just went to a black screen and did nothing.

During the course of looking and and reseating all the chips back on to the NHL board, I noticed the graphics chip was in there the wrong way. The chip has a cut corner, yet it was loaded incorrectly. I popped it out, reloaded it into the socket the correct way, booted the board - and instead of a black screen, I got the same graphics that I got on the UMK3 board with the NHL EPROMS! So the board DID work, but the issue was clearly with the EPROMS.

I put in an order for some clean pulls of the EPROMS on ebay (to replace the ones with the bad legs). I also got my EPROM burner in today, so I'll use that to test and replace the bad chips. But the sockets was still going to be an issue. I didn't want to put clean new chips in those dirty, corroded sockets, so tonight I whipped out my trusty Hakko desoldering gun and I removed all the bad sockets that I would be needing to use and ordered replacements off eBay. After an hour and a half, I was here:

You can see the empty spaces on the board where the sockets were, and said bad sockets off to the left.

The goal is to take my time replacing all the sockets, then burn the EPROMs and finally have a working NHL Open Ice board, which I will then throw into my NBA Jam cab using a switcher, or I will sell it to Malenko for an obscene amount of cash. Either way, it's a pretty good learning experience.

Slippyblade:
That is cool, I need better tools. Good luck on this one! Think you'll have it done by the 6th?

yotsuya:

--- Quote from: Slippyblade on May 29, 2015, 05:46:06 pm ---That is cool, I need better tools. Good luck on this one! Think you'll have it done by the 6th?

--- End quote ---
Thanks. It all depends on when all the parts come in. The sockets are coming from Thailand, and the chips are coming from China. So who knows when I'll get everything together. All I know is I'm going to take my time on this, because I really want to be one of those guys that says, "Yeah I can fix my own stuff."

The ROM burner has been fun to play with. It was kind of neat verifying the ones that were working on it, and seeing how many bad chips I really have.

wp34:
That's a really cool project yotsuya. You will have a shingle out to fix boards in no time. :cheers:

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