4078-00X
Test Page
This test prints the test page.
To run a complete test page of black and color patterns, be sure the print cartridge is in good condition. Install a black print cartridge.
To enter the test:
•Press and hold the Paper Feed 
button while turning the printer on. Paper feeds from the sheet feeder and prints the test page. Pages continue to print until you turn off the power or unplug the printer.
The test page prints the following lines.
Line 1 - Code level.
Line 2 - Manufacturer name.
Line 3 - Model name.
Line 4 - US or EMEA defaults.
Line 5 - Page count followed by the last error.
The next line is the black print cartridge nozzle pattern. The next three lines are the purge pattern where all nozzles are printing. This action cleans (purges) the nozzles. Another nozzle test pattern follows.
These test patterns are used to verify all print cartridge nozzles are working. There should be no breaks in the diagonal line. A break in the diagonal line indicates one or more nozzles are not working.
The rest of the page contains the user defaults followed by a printout of the printer resident fonts.
Diagnostic Aids