Addressing support code 1651 that may be displayed for the PIXMA TR4720.
The printer is unable to recognize the status of the ink cartridge. Printing functionality is disabled until successful communication is restored.
Press the printer's Stop button to cancel printing.
Check the following to restore communication with the printer.
Network Connectivity
Check the connection status between the printer and the network. Manually Solved Network Troubles
Web Service License Agreement Status
Print the network setting information of the printer and check "Web Service Status" (registration status). Printing Network Settings
If it is not "Registered", refer to the following page and re-register the service. Re-register the service
Service Engagement Status
Refer to the following page and check the service contract status. Confirm service contract