12-10 Maintenance Chapter 12Testing and Cleaning the BJ Cartridge Print HeadThe print head in the BJ cartridge contains nozzles through which ink is propelled onto thepaper. To maintain the best possible print quality, these nozzles need to be cleaned from timeto time. Your unit is equipped with a print head cleaning function that does this.Printing the Nozzle Check PatternBefore cleaning the print head, you may want to print the nozzle check pattern to test theprint head of the BJ cartridge installed in the unit. This test shows if each print head nozzle isoperating properly.Refer to the flow chart (→ p. 12-9) for the correct order of testing and cleaning the BJcartridge print head.Follow this procedure to print the nozzle check pattern:1 Press Function.2 Press Cleaning.3 Press Set.• The unit prints the nozzle check pattern.When the Colour BJ cartridge is installed, the pattern includes all four colours; yellow,magenta, cyan, and black. In the colour pattern you will notice that lines are missing betweenthe colours. This is normal.242464242424Ver. 1.0024 24nPrint the nozzle check pattern again after cleaning the BJ cartridge print head to check if cleaningcorrected the problem.Nozzle CheckPatternIf the pattern isbroken, missing, or aspecific colour is notprinted, clean the BJcartridge print head.(→ p. 12-11)NOZZLE CHECK
