Based on repair data and technical documentation for this module and its variants (like the HYS3B210-CS), the unit typically features: Primary Output: +48V DC (used to power the main amplifier). Secondary Outputs: +/-7V DC and a Ground (GND) terminal. Control Pin:
Shut down the device and unplug it from the wall. Repeatedly press the power button for 10–15 seconds to drain the capacitors, then wait 10 minutes before plugging it back in. hys3c210cs power supply free