Canon 9491B003 Online Manual page 452

Cannot Communicate with the Printer Using the Access Point Mode
Make sure that the printer is turned on.
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Is Change LAN in LAN settings under Device settings set to LAN inactive,
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Wireless LAN active, or Wired LAN active?
Select AP mode active.
Is the printer selected to connect external communication devices (e.g.
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computers, smartphones, or tablets)?
Select an access point name (SSID) specified for the printer as a destination for external communication
devices.
Enter a password if you specify it for the printer.
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Make sure that external communication devices are not placed far away from
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the printer.
Do not locate external communication devices too far away from the printer.
Make sure that there is no obstruction.
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Wireless communication between different rooms or floors is generally poor. Adjust the location of the devices.
Make sure that there is no source of radio wave interference in your vicinity.
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If a device (e.g. microwave oven) using the same frequency bandwidth as the wireless station is placed
nearby, the device may cause interference. Place the wireless station as far away from the interference source
as possible.
Are you trying to connect 6 devices or more?
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You can connect up to 5 devices using the access point mode.
Cannot Communicate with the Printer over the Wired LAN
Make sure that the printer is turned on.
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Make sure that the LAN cable is connected properly.
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Make sure that the printer is connected to the router with the LAN cable. If the LAN cable is loose, connect the
cable properly.
If the LAN cable is connected to the WAN side of the router, connect the cable to the LAN side of the router.
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