NEO-CDA board

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Audio/video and power boards in top-loading NeoGeo CD consoles.

NEO-CDA3-1

NEO-CDA3-1 power supply zone schematic

Neocda31.jpg

Carries a Chipicon.png YM3016 DAC, LC78815 CDDA DAC, 2 quad op-amps, a CXA1645 video encoder, 2 7805 regulators, a LM2930 8V regulator and various transistors.

Connectors, from left to right (need exact pinouts):

  • YM2610 to YM3016 serial data
  • CDDA left, right, clock
  • RGB video and sync
  • CD 5V, 10V CD, 5V logic, Ground

NEO-CDA4-1

Neocda41.jpg

Same as the NEO-CDA3-1, but with only one dual op-amp and a second LC78815 instead of the YM3016 (which isn't needed anymore with boards using the Chipicon.png NEO-YSA chip, capable of outputting LC78815 compatible serial streams).

24M08 regulator instead of the LM2930 ?

Connectors, from left to right (need exact pinouts):

  • CDDA left, right, clock
  • NEO-YSA left, right, clock
  • RGB video and sync
  • CD 5V, 10V CD, 5V logic, Ground