Canon PIXMA iP8750 - Manual (Page 263)

The Printer Stopped Working Suddenly
Cannot Communicate with the Printer over the Wireless LAN
Cannot Print from a Computer Connected to the Network
Cannot Communicate with the Printer over the Wireless LAN
Check1 Make sure that the printer is turned on.
Check2 Make sure that the network settings in the printer are identical with those of
the access point.
Refer to the instruction manual provided with the access point or contact its manufacturer to check the access
point settings, and then modify the printer settings.
How to Set a WEP/WPA/WPA2 Key
Check3 Make sure that the printer is not place as far away from the access point.
The access point is located indoors within the effective range for wireless communication. Locate the printer
within 164 ft. / 50 m from the access point.
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 the valid wireless channel is used.
The wireless channel to be used may be limited depending on wireless network devices installed in the
computer. Refer to the instruction manual provided with your computer or your wireless network device to
specify the valid wireless channel.
Check9 Make sure that the channel set to the access point is valid to communicate
with the computer, confirmed in Check 8.
If not, change the channel set to the access point.
Check10 Make sure that the firewall of the security software is disabled.
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