What it is
OpenKSK is an open source hardware (OSHW) project creating a faithful reproduction of the Sony KSK-1200A CD-ROM laser board from the Sega CD Model 1. The original boards are notorious for fragile capacitor pads and are frequently damaged in the field, so OpenKSK provides a durable, drop-in replacement and repair part.
The reference board is a faithful reproduction, and anyone can create a derivative of the PCB under the CERN-OHL-S license.
Why you’d want one
- Repairing damaged originals. The KSK-1200A’s capacitor pads are single-sided eyelets with no plating, attached by weak glue, and in many cases ride a single thin trace with no teardrop — so they’re often destroyed during a recap. Boards are also wrecked by leaked capacitors, liquid spills, flooded basements and warehouses, humidity, and failed mod attempts. OpenKSK boards provide a cleaner repair with stronger pads, and work as a direct replacement part.
- Learning. Building one by hand is a great way to understand how a CD-ROM drive system actually works.
- Customization. OSHW parts are ideal when restoring a beat-up unit. Choose a rustic board so we don’t deplete the supply of originals in good condition.
- Integrating fixes and mods. Because it’s a faithful reproduction, you can remix a custom board that bakes your own mods or fixes into the design.
Build and installation steps are covered in the project documentation, including community install videos (e.g. 1up Restorations).
Gallery notes
Swap the placeholder images for renderings, prototypes, manufacturing photos, and finished installation examples as the product matures.
