HYS3C210-CS refers to a specific power supply board used in high-end audio equipment, most notably subwoofers from brands like Harman Kardon (e.g., HKTS 200, HKTS 210) and Key Specifications & Function
Secondary Low-Power Rails: Outputs +/- 7V DC, which supply power to the pre-amplifier, crossovers, and standby logic circuits. hys3c210-cs
Auxiliary Rails: +7V, -7V, and Ground (GND) for low-voltage circuitry. HYS3C210-CS refers to a specific power supply board