mvs jamma to cga to hdmi converter shaky picture?

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    • mvs jamma to cga to hdmi converter shaky picture?

      Sort of a shot in the dark here -

      On both my cga to hdmi converter and cga to vga converter the following boards have a jumpy scrambled picture

      mvs jamma
      taito pcb
      arpicade

      however atomiswave and cps2 work fine. all boards work fine in a regular jamma cab.

      I read somewhere these scalers like 3.3+ volt on the vsrgb input and some boards put out 5v+. Is it possible I should put some resistors in? if so what ohm?

      or am I way off and theres something else wrong?
      Multi: DS CPS2, NEO-GEO MVS
      Cabs: Viewlix C, Vewlix L x2, G-Balance, SQ Multi x2, MVS BR4S, Capcom Dynamo H5, Atomiswave US, Virtua Fighter 1&3
      FPGA: Super NT, Mega SG
      Chips: Midwest GBC LCD, SNES/64 RGB, SS Rhea, DC USBGDROM DCHDMI