Canon TR7600 Series Online Manual page 324

Make sure that the printer is not placed behind an object. The printer may not be connected when placed behind a wall or on a shelf. Try to
place the printer in a location where there is no obstacle.
For details, see the instruction manual supplied with the wireless router or contact the manufacturer.
When you complete checking [Step 1] above, try to set up from the beginning.
If the printer cannot be detected after trying to set up from the beginning, proceed to [Step 2].
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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