Donkey Kong - Low green bias after installing 3DK Multigame kit.

mattmatt

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*** UPDATED BELOW***

DK board works great, (first photos) then I added the Highscoresaves 3DK Multigame with remix and my green bias goes away (Second photos). When I turn the green all the way up, I still can't get enough green. I checked the green bias pot on the neck and it reads at 2.2k pegged. I removed and replaced original rams, board went back to working. Reinstalled multikit and the green issue came back.
Has anyone else had this issue or have a fix idea?


*** UPDATE ***
I have 2 DK machines and 3 DK boards. On one machine, when I plug in the unmodified boards, the colors are fine, but when I install the 3DK I lose the green.

  • So I tried different combinations of unmodified boards and kitted boards in the 2 cabinets
  • Based on the results of my 7th grade science project, (matrix below)I'm thinking I have some type of issue with the monitor not being able to gain enough green signal? But I don't really understand this part yet. I'm hoping this might be a known issue and someone may have more ideas
  • Transistor on neck board?
  • Someone said there is adjustment on the monitor chassis board?
  • Any help is appreciated
1747412865175.png
 

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The first thing I'd do is contact Highscoresaves since you bought the kit from them. But if I was to guess, I'd say it's something related to the color PROM board (plugs into 2E and 2F). The ROM(s) on the HSS board could be bad/wrong/etc., could have a broken pin, or something along those lines. You might be able to leave your original PROMs in and try it (colors would probably be wrong for some games, but if you had green, that'd somewhat confirm you're at the right spot)... but again, I'd check with HSS before messing with it too much.

DogP
 
The first thing I'd do is contact Highscoresaves since you bought the kit from them. But if I was to guess, I'd say it's something related to the color PROM board (plugs into 2E and 2F). The ROM(s) on the HSS board could be bad/wrong/etc., could have a broken pin, or something along those lines. You might be able to leave your original PROMs in and try it (colors would probably be wrong for some games, but if you had green, that'd somewhat confirm you're at the right spot)... but again, I'd check with HSS before messing with it too much.

DogP
Thanks, I messaged highscoresaves. I updated the description with my latest tests. check it out. Thanks!
 
I just ordered one! It'll replace my standalone d2k!

I'm glad you can set it to boot to a single game, it's so neat what high score saves has made
Yep I have mine boot to DKJr so the cab acts just like it should unless you hold the P1 button and then it goes to the menu. DK sounds perfect with the add-on sound card and the remix levels and D2K are great. Installation was really easy too. It's several individual daughter boards but the instructions are clear and I installed it in about 30 minutes going slowly and checking everything multiple times.

I ordered their topper too which looks really nice IMO.
 

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