and conventional and will thus not be explained in further detail herein referring to fig4 the replaceable inkjet cartridge 26 includes a housing 40 containing ink and a nozzle plate 42 nozzle plate 42 has a substantially linear array of nozzles 44 in one embodiment of the large format inkjet printer 10 the nozzle array 44 includes two substantially parallel columns of nozzles 46 however other embodiments of the large format inkjet printer 10 can have one three or more columns of nozzles 46 the replaceable inkjet cartridge 26 forms images on the media by selectively ejecting ink drops from the nozzles 46 in the nozzle array 44 as the replaceable inkjet cartridge 26 translates across the media in a direction generally perpendicular to the direction of alignment of the nozzle array 44 referring to fig5 a and 5b a silicon integrated circuit chip 48 is positioned behind nozzle plate 42 in the replaceable inkjet cartridge 26 chip 48 includes substrate heaters 50 and 52 for example embedded resistors positioned at opposite ends of the chip 48 substrate heaters 50 and 52 heat the cartridge 26 and the ink in housing 40 to a predetermined temperature chip 48 also includes a channel 54 to deliver ink past ink drop forming resistors 56 shown in fig5 b positioned in two columns 58 and 60 nozzle plate 42 is positioned so that each nozzle 44 is located proximate to a corresponding resistor 56 actuating resistor.