Konami 054986A chip by Caius

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    • edwin128 wrote:

      hi Caius. Thx for the update. I see the two ram palettes and the two chips from the below the custom in your reproduction.
      are the long components in your reproduction resistors? did you get them from somewhere in the pcb?

      do you need to provide new ram palettes for the reproduction? because i think that is the reason the custom fails.

      could you elaborate more in the steps? :)

      cheers, edwin.
      The three components mounted vertically are the Konami ''052325' RGB DAC.I took them from another PCB but I could also use my reproduction instead:

      jammarcade.net/konami-052535-reproduction/

      Or implement the circuit directly on my repro but I chose a modular solution so I can replace them if they ever fail.

      The original custom contains the two RAMs but all other ICs are in form of bare die.Hence for my reproduction I didn't do any decapping (it would have been useless since I'm not able to identify bare die) but I studied the color circuit design on other Konami PCBs
      Anyway if I ever sell this reproduction (only fully assembled, no DIY kit) it will be not really cheap since it's made of many parts.Plus you have to consider the time spent for engineering.
      Now my question.Are you trying to steal info to repair your faulty module or do your own reproduction? :)
    • caius wrote:

      edwin128 wrote:

      hi Caius. Thx for the update. I see the two ram palettes and the two chips from the below the custom in your reproduction.
      are the long components in your reproduction resistors? did you get them from somewhere in the pcb?

      do you need to provide new ram palettes for the reproduction? because i think that is the reason the custom fails.

      could you elaborate more in the steps? :)

      cheers, edwin.
      The three components mounted vertically are the Konami ''052325' RGB DAC.I took them from another PCB but I could also use my reproduction instead:
      jammarcade.net/konami-052535-reproduction/

      Or implement the circuit directly on my repro but I chose a modular solution so I can replace them if they ever fail.

      The original custom contains the two RAMs but all other ICs are in form of bare die.Hence for my reproduction I didn't do any decapping (it would have been useless since I'm not able to identify bare die) but I studied the color circuit design on other Konami PCBs
      Anyway if I ever sell this reproduction (only fully assembled, no DIY kit) it will be not really cheap since it's made of many parts.Plus you have to consider the time spent for engineering.
      Now my question.Are you trying to steal info to repair your faulty module or do your own reproduction? :)
      Hi Caius. Thx for your reply. I don't have the skills to make a repro like yours :( . I was just curious how you got that amazing result ;) .

      Keep up your marvelous preservation job.
    • edwin128 wrote:

      Hi Caius. Thx for your reply. I don't have the skills to make a repro like yours :( . I was just curious how you got that amazing result ;) .
      Keep up your marvelous preservation job.
      Nobody born with the skills, you can have talent but it's nothing without assiduous dedication.
      Anyway, I successfully reproduced also the Konami '007327' (used on many PCBs like Jackal, Super Contra, Haunted Castle, etc..), it's very similar to the '007593' so it took few time to do it.The two wires you can see are to fix a mistake made by me during design (I swapped two signals).
      Here's testing on a Jackal PCB:

      Images
      • DSCN4706 - Copia.JPG

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      • 007327.jpg

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      The post was edited 1 time, last by caius ().