This Avitech MCC-8001U Image Scaler/Processor comes with a correct power supply. However, it's worth noting that the fan runs louder than normal.

To use the Avitech MCC - 8001U Image Scaler/Processor, first, connect it to the correct power supply provided. Once powered on, you can start using it to scale and process images. As for the louder - than - normal fan, don't worry too much, it's a known characteristic of this product. When it comes to maintenance, keep the device in a clean and dry place. You can also periodically check the power supply for any signs of damage. If you notice any other issues, it's best to contact the manufacturer for assistance.