Connect the Sharp AR 5620 SL to your PC using the USB cable. Turn the printer on. Windows will likely attempt—and fail—to find a driver automatically. This is normal.
The wizard will ask how the printer is connected. driver sharp ar 5620 sl
Use VueScan (paid) or NAPS2 (free) – they support legacy Sharp scanners via generic TWAIN. Connect the Sharp AR 5620 SL to your PC using the USB cable