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Arcade Collecting => Restorations & repair => Topic started by: Mike A on October 10, 2017, 07:31:52 am

Title: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: Mike A on October 10, 2017, 07:31:52 am

Well it looks like my luck turned a little sour. The graphical glitches came back. They come and go now. I am going to start by removing the PCB and attaching 5V and Ground to every test lead I can find. A couple of the edge connector pins are burned which I found out is relatively common with Pole Position. The guy before me only attached an additional 5V to one spot on each PCB.

I am going to power the PCB with a modern switching power supply to see if that and the additional power distribution wires calm things down. If that works I can clean up and refurbish the original power supply at my leisure.

Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: jennifer on October 10, 2017, 07:14:46 pm

  Not quite sure what your working on, But that sounds more like a bad ground , faulty cap, or transistor given the burnt pins... If it did work something has changed in terms of draw.

Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: HaRuMaN on October 10, 2017, 07:20:08 pm

Or you could just wait for this...

http://forums.arcade-museum.com/showthread.php?t=209988 (http://forums.arcade-museum.com/showthread.php?t=209988)

Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: jennifer on October 10, 2017, 07:34:55 pm

   Or this since you tricked me to that wet fish Klove...http://www.ratemyvomit.com/ (http://www.ratemyvomit.com/)

Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: Mike A on October 10, 2017, 08:08:58 pm

There is a design flaw on Pole Position boards. The power distribution is uneven I guess because of the physical size of the boards. More power gets dumped in to compensate. Eventually the edge pins fry. That is what I read so far.

Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: Mike A on October 11, 2017, 05:27:55 pm

Well I started pulling, cleaning, and reseating chips one at a time. It appears this guy was causing problems. I have a good solid picture again. We will see how long that lasts.(https://uploads.tapatalk-cdn.com/20171011/e639a4fd0909e47b0008c4142d865137.jpg)(https://uploads.tapatalk-cdn.com/20171011/751a656afd874e87bc9b1e8c51056784.jpg)

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Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: Mike A on November 06, 2017, 10:25:44 am

I am starting to work on my spare Pole Position 2 board. This chip is garbage. Two legs are broken. How do I go about getting a new ROM chip? It is 52XX.bin I think. is there a professional service that flashes ROM chips or is the equipment cheap enough that people do it on their own? I don't know anything about this.(https://uploads.tapatalk-cdn.com/20171106/2f6f04e4ccb265ae38b534eb1c714252.jpg)

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Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: yotsuya on November 06, 2017, 10:55:38 am

If that's a Namco custom, you're SOL. You'll need to find a board to harvest one from, or just get on the Multi Pole Position waiting list. You could also try resoldering new legs onto the chip as well.

Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: Mike A on November 06, 2017, 11:12:10 am

My board has the Atari Pinout.

Could you point me to instructions for soldering new legs onto a chip?

Thanks Yotsuya.

Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: Mike A on November 06, 2017, 11:19:17 am

I checked out a video showing how to replace a broken leg. It looks straightforward enough. I am going to give it a try when I get home from work.

Title: Re: Pole Position II -Glad I Didn't Buy a Lottery Ticket
Post by: yotsuya on November 06, 2017, 11:20:38 am

Quote from: Mike A on November 06, 2017, 11:19:17 am

I checked out a video showing how to replace a broken leg. It looks straightforward enough. I am going to give it a try when I get home from work.

It's pretty easy. I've done it before. You should be cool. :cheers: