●
If the problem persists even after trying the troubleshooting methods, contact your dealer or service
representative. If the Problem Persists(P. 339)
Cannot analyze the authentication server certificate.
The certificate of the authentication server may not be correct, or it may be a format unsupported by the machine.
Check the Certificate of the Authentication Server, and Change the Setting, as Needed.
Cannot find the access point.
An error occurred, preventing the machine from detecting the wireless LAN router (access point).
Is Connection Type Configured Correctly?
Select the connection type (WPS) according to the method supported by the wireless LAN router.
Connecting to a Wireless LAN by Using the Router Button (Push Button Mode)(P. 41)
Did You Connect Within the Fixed Time?
When connecting by pressing a button on the wireless LAN router, set the connection type on the operation
panel of the machine, and then press the button on the wireless LAN router within one or two minutes.
Connecting to a Wireless LAN by Using the Router Button (Push Button Mode)(P. 41)
Are the SSID and Network Key Configured Correctly?
When entering the wireless LAN router information manually, check the SSID and network key of the wireless
LAN router, and configure the settings correctly on the machine. Connecting to a Wireless LAN by
Setting the Details (Manual Setup Method)(P. 47)
Are the Machine and Wireless LAN Router Located Appropriately?
●
The machine and wireless LAN router should be installed in a location without walls or other obstructions
between the devices and within range of 50 m.
●
Do not install near a microwave oven, digital cordless telephone, or other device that generates radio
waves.
Check the Security Settings of the Wireless LAN Router.
For details, see the manual of the wireless LAN router or contact the manufacturer.
Cannot print. A non-Canon or counterfeit cartridge may be in use. Close:
Press OK
Printing cannot be performed due to the use of a toner cartridge whose print quality cannot be guaranteed.
Replace with a New Toner Cartridge.
Replacing the Toner Cartridge(P. 257)
For optimum print quality, using Canon genuine toner cartridges is recommended. List of
Troubleshooting
326
Summary of Contents for imageCLASS LBP121dn
Page 1: ...imageCLASS LBP122dw LBP121dn User s Guide USRMA 7917 00 2023 02 en Copyright CANON INC 2023 ...
Page 7: ...Notice 358 Trademarks and Copyrights 359 Third party Software 361 VI ...
Page 47: ... Shared Key Encryption for WPA WPA2 TKIP AES CCMP IEEE 802 1X Authentication Setting Up 40 ...
Page 65: ... The settings are applied Setting Up 58 ...
Page 100: ...Paper with logo in landscape orientation Basic Operations 93 ...
Page 105: ... The custom paper is registered Basic Operations 98 ...
Page 138: ...6 Log out from Remote UI Linking with Mobile Devices 131 ...
Page 159: ...8 Log out from Remote UI Security 152 ...
Page 207: ... Off On Settings Menu Items 200 ...
Page 250: ... Off On Settings Menu Items 243 ...
Page 284: ... When you select On the printing speed may decrease Troubleshooting 277 ...
Page 353: ...Manual Display Settings 95LW 08H Appendix 346 ...