Canon PIXMA TR7020A Online Manual page 331

Solve the Problem, Using IJ Network Device Setup Utility
Step 2
Diagnose and repair the network connections using IJ Network Device Setup Utility.
Download IJ Network Device Setup Utility from the below page, and install it on your computer.
Checking Printer Connection Status Using IJ Network Device Setup Utility
Refer to below in regard to starting up IJ Network Device Setup Utility.
• For Windows:
Starting Up IJ Network Device Setup Utility
• For macOS:
Starting Up IJ Network Device Setup Utility
Once revised, try to set up from the beginning.
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