Dragon's Lair Fans - Arcade Lifestyle

General Chat => Technical Area => Topic started by: gyruss on June 24, 2017, 09:22:20 PM

Title: Donkey Kong PCB Problem(?)
Post by: gyruss on June 24, 2017, 09:22:20 PM

Hi Guys!

Been a long time since i posted here, was busy with life and other interests but it seems that i'm slowly getting the passion back for this hobby.

One of the main things that triggered it was the totally awesome Sky Skipper project, what a beautiful machine and what a cool story!
Seeing this cab got me motivated to work on my DK again, so today i finally chanced my scratched bezel for a very clean looking one which Erik Sold me (Thnx!)...  

(http://i1069.photobucket.com/albums/u471/Gyruss99/D4F6D1E0-07AC-4B8E-BAC3-86D445462F92.jpg) (http://s1069.photobucket.com/user/Gyruss99/media/D4F6D1E0-07AC-4B8E-BAC3-86D445462F92.jpg.html)

But as you can see the machine doesn't work anymore! Its starts with displaying the high score table 2 times, then the construction where the characters move isn't visible anymore and after the game has starts I get this garbage on the screen.

(http://i1069.photobucket.com/albums/u471/Gyruss99/F8071FA4-1899-4DB5-A18E-CB32D12B7C0B.jpg) (http://s1069.photobucket.com/user/Gyruss99/media/F8071FA4-1899-4DB5-A18E-CB32D12B7C0B.jpg.html)

(http://i1069.photobucket.com/albums/u471/Gyruss99/8E06903F-0B21-40CB-B797-6FC125E26EDD.jpg) (http://s1069.photobucket.com/user/Gyruss99/media/8E06903F-0B21-40CB-B797-6FC125E26EDD.jpg.html)

(http://i1069.photobucket.com/albums/u471/Gyruss99/6371DF58-A16F-44AB-9EAD-64F6D404DCF6.jpg) (http://s1069.photobucket.com/user/Gyruss99/media/6371DF58-A16F-44AB-9EAD-64F6D404DCF6.jpg.html)

Title: Re: Donkey Kong PCB Problem(?)
Post by: gyruss on June 24, 2017, 09:24:21 PM

Already took a look at: http://www.brasington.org/arcade/tech/dk/ But can't see the problem.

So is anybody familiar with this issue and can it be fixed by getting new Eproms?

Or can you guys recommend somebody in Europe who fixes PCB's, so i don't have to send it to Mikes Arcade?

Title: Re: Donkey Kong PCB Problem(?)
Post by: Ramakers on June 25, 2017, 10:59:36 AM

Hello,
this doesn't look like a ROM problem. I suspect an address line stuck. But after reading the website you suggested you could start by cleaning the socketed chips.
Here is a nice guide on how to do this: https://www.youtube.com/watch?v=RkSCh53fO6Y (https://www.youtube.com/watch?v=RkSCh53fO6Y)
If this doesn't do the trick and you have some patience I'm willing to take a look at the PCB, I am from Belgium. Send me a PM if you are interested.

Title: Re: Donkey Kong PCB Problem(?)
Post by: Etienne MacGyver on June 26, 2017, 08:44:22 AM

I know Robin does not do this alot anymore, but did you ask him ?
It could be worth a shot  ;)

Title: Re: Donkey Kong PCB Problem(?)
Post by: Robinholland on June 26, 2017, 11:55:57 AM

Sorry no time at the moment , to much to do  :?

Title: Re: Donkey Kong PCB Problem(?)
Post by: gyruss on June 26, 2017, 02:09:29 PM

Didn't want to ask Robin because he already helped me a lot in the past..  ;)

@Ramakers: thanks, let me try that and if it doesn't work ill PM you..

Title: Re: Donkey Kong PCB Problem(?)
Post by: ckong on June 26, 2017, 11:42:20 PM

Oh, what a lovely bezel!  ;) :)

I'm sorry that I can't help you a lot, but check the obvious things like cleaning the sockets, checking voltage, check connectors and give it a whank!  ;D This game needs to be fixed of course, you didn't feed DK for quite some time, I guess.

Title: Re: Donkey Kong PCB Problem(?)
Post by: gyruss on July 03, 2017, 09:31:31 AM

Indeed, didn't turn it on for ages... anyway, will try some of the stuff that is mentioned!