Humax usually includes power adapter details within the primary user manual of the receiver (e.g., the Humax HDR-1100S or FVP-5000T). Check the "Package Contents" or "Technical Specifications" section of your specific receiver's manual.
If you own a Humax HV100-03, you likely already know that this device is a workhorse. Whether you are using it for digital signage, hospitality TV solutions, or as a reliable set-top box, getting it configured correctly is key to a smooth experience. humax hv100-03 manual