Canon PIXMA TS3500 Series Online Manual page 291

If it is not, change the channel set on the wireless router.
Make sure security software's firewall is off.
Check8
If your security software's firewall is on, a message may appear warning you that Canon software is attempting
to access the network. If this warning message appears, set security software to always allow access.
If you are using any programs that switch between network environments, check their settings. Some
programs use a firewall by default.
If printer is connected to an AirPort Base Station via LAN, make sure you use
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alphanumeric characters for network name (SSID). (macOS)
If the problem is not resolved, click here and redo setup.
• • Positioning:
Place the printer and wireless router where there are no obstacles between them.
Cannot Connect to a Printer through Wireless Direct
Check printer settings.
Check1
Make sure the icon is displayed on the LCD.
If not, press the Wireless select button to enable Wireless Direct.
Check the settings of your device (smartphone/tablet).
Check2
Make sure Wi-Fi is enabled on your device.
For details, refer to your device's instruction manual.
Make sure printer is selected as connection for device (e.g. smartphone or
Check3
tablet).
Select the network name (SSID) for Wireless Direct specified for the printer as the connection destination for
devices.
Check the destination on your device.
For details, refer to your device's instruction manual or visit the manufacturer's website.
To check the network name (SSID) for Wireless Direct specified for the printer, print out the network setting
information of the printer.
Printing Network Settings
Have you entered the proper password specified for the Wireless Direct?
Check4
To check the password specified for the printer, print out the network setting information of the printer.
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