Donkey Kong HELP

andrewuts1

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I am having verticle glitches on the screens which involve game play but don't seem to be present on the still screens. To date I have swaped power supply and pcb into another working DK and they seem to be fine. My +5v is at 5.1v. I have also put a new cap kit on as well as flyback, checked my B+ at 111 (just above 108) and still have this issue. I was convinced this is a monitor issue but am starting to have second thoughts. Could it just be coincidence the pcb worked fine in another cab? Any idea where to go from here? Thanks, Andy
 
Just tested pcb again and it worked fine in my known working cab so I'm fairly certain the pcb and ps are not the problem. The flyback I installed was purchased used but supposedly working although it looked like it had leaked previously out the top. I'm not sure this is indicative of a problem however. Any other ideas? Andy
 
The pots on the remote board on the monitor chassis are known to be flaky. Try moving them a bit and see if it helps.
 
Another vote for pots. I had to replace all the remote board pots ($5) and the B+ pot on my dk to get rid of all the problems. Screen shaking due to remote board pots, and the b+ pot would start low and go extremely high causing different sized screens.

Also replaced the pots on the gameboard
 
Yes, I have a switching ps. Is 111v at my B+ high enough to cause issues? I did crack the edge of the chassis when removing it but it appeared only one trace was affected so I ran a jumped. I assumed that would fix it. Does the width of the wire I used matter?
 
Are the pots on the remote board the 5 in a row for volume, width, etc the ones your referring to? Right under the audio board???
 
I just posted this in the other thread . . .

A word of caution with switching power supplies in DKs. . . I've got one in mine. It worked like a charm with the 4-board set I had in there (this is an early dk that originally came with a 4-board set). I bought a DJ Jr. 2-board set and that worked like a charm in there too. Then I bought a 2-board set from Anthony at quatercade (he is the only one I could find that would guarantee me a boardset that met twin galaxies' stupidly insane standards). Anyway, the first board Anthony sent did not work right in my DK. It was playable but it had lots of what I'll call, vertical sprite glitches. I told Anthony about the glitches and he said, "hm that's weird, I'm sure I tested it, but send it back." I sent it back, he tested it, and says its working fine on his end. At that point he asked about my power supply. I told him I had a switching supply currently installed. He said that he's seen compatibility issues with DK boards and switching supplies before. So, Anthony being the stand up guy he is, goes and tests a bunch of his boards using a switching supply rather than a nintendo supply, and he finds out of 3 boards he testedo 2 had issues with the switching supply. He sent me the one that worked with the switching supply. It works great with my switching power supply.

Then I try to install a DK2 kit on the board from quatercade. DK2 plays fine on it, but when I try to play DK through the kit, the game has some weird glitchy stuff going on making DK unplayble with the kit. I send my board and kit to Steve at Acade Shop for him to check it out. He replaces the z80 socket (for FREE), tests it, and says everything is working fine for him. He sends it back to me but it still does not working right in my machine. Steve also mentioned something about the power supply being a possible problem but was not sure.

Anyway, my next step is to install an original power supply and see if that changes anything. I'm not by any means saying I'm sure its the power supply causing the issues, but with Anthony's experience with the switching supplies causing problems on DKs I'm suspicious that my problem might be my power supply.

I need an original power supply to submit scores anyway.
 
That is very interesting. However, my known working cabinet has a switching power supply as well however and both my pcb's play in it and neither one work without glitches in my restoration cabinet???
 
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