Canon MX520 series Online Manual page 38

Cannot Detect the Machine with the Wireless LAN: Check 6
Check the settings of the access point.
Check the settings of the access point for the network connection such as IP address filtering, MAC
address filtering, or DHCP function.
For details on how to check the settings of the access point, refer to the instruction manual supplied with
the access point or contact its manufacturer.
After checking the settings of the access point, click Redetect on the Check Printer Settings screen.
When the machine is detected, follow the instructions on the screen to continue to set up the network
communication.
If the problem is not resolved, select the Set up the network connection via USB check box on the
Check Printer Settings screen and click Next to set up the network communication via USB.