Canon iB4100 series Online Manual page 586

Make sure printer is not too far away from wireless router.
Check5
Locate the printer close enough to communicate with the wireless router.
Check for obstructions.
Check6
Wireless communication between different rooms or floors is generally poor. Move the printer and wireless
router as necessary.
Make sure there is no source of radio wave interference nearby.
Check7
If a device like a microwave oven that emits radio waves of the same frequency bandwidth as a wireless router
is nearby, it may cause interference. Place the wireless router as far away from the interference source as
possible.
Cannot Communicate with Printer while It Is in Direct Connection
If your smartphone/tablet cannot communicate with the printer in the direct connection, check the
following.
Make sure printer is turned on.
Check1
Set Change LAN in LAN settings under Device settings to Direct
Check2
connection.
Check settings of your smartphone/tablet.
Check3
Make sure your smartphone/tablet can use the wireless LAN.
For more on performing setting of the wireless LAN, refer to the instruction manual provided with your
smartphone/tablet.
Have you selected printer as destination of your smartphone/tablet?
Check4
Select the access point name (SSID) of the printer with your smartphone/tablet.
Have you entered proper password specified for direct connection?
Check5
If the security setting of the direct connection is enabled, you need to enter the password to connect your
smartphone/tablet to the printer.
Make sure printer is not too far away.
Check6
Locate your smartphone/tablet close enough to communicate with the printer.
Check for obstructions.
Check7
Wireless communication between different rooms or floors is generally poor. Move the printer as necessary.
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