Canon PIXMA E481, Online Manual, Page: 585 / 776

The Machine Stopped Working Suddenly
Cannot Communicate with the Machine over the Wireless LAN
Cannot Communicate with the Machine while It Is in the Access Point Mode
Cannot Print or Scan from a Computer Connected to the Network
Cannot Communicate with the Machine over the Wireless LAN
Check1
Make sure that the machine is turned on.
Check2
Are the network settings of the machine identical with those of the wireless
router?
Make sure that the network settings of the machine (e.g. wireless router name, SSID, network key, etc.) are
identical with those of the wireless router.
To check the settings of the wireless router, refer to the instruction manual provided with it or contact its
manufacturer.
To check the current network settings of the machine, print out the network setting information.
Printing Out Network Setting Information
If the network settings of the machine are not identical with those of the wireless router, change the network
settings of the machine to match with those of the wireless router using IJ Network Tool.
Check3
Make sure that the machine is not placed far away from the wireless router.
The wireless router is located indoors within the effective range for wireless communication. Locate the
machine within 164 ft. / 50 m from the wireless router.
Check4
Make sure that there is no obstruction.
Wireless communication between different rooms or floors is generally poor. Adjust the location of the devices.
Check5
Make sure that there is no source of radio wave interference in your vicinity.
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.
Check6
Make sure that the network settings of the computer are correct.
For the procedures to connect a network device to the computer and set them up, refer to the instruction
manual of your network device or contact its manufacturer.
Check7
Make sure that the radio status is good and adjust the installation positions
while monitoring the radio status with IJ Network Tool.
Monitoring Wireless Network Status
Check8
Make sure that a valid wireless channel is used.
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