SAVE TIME AND ExPENSE WITH User-replaceable printHeads
The HP Designjet L25500 Printer series is designed to save you time and money. Printheads you can replace yourself eliminate the down-time and expense of a service call. And fully-automatic printhead testing
and maintenance systems eliminate time-consuming daily manua maintenance.
See details in this link . . http://www.hp.com/hpinfo/newsroom/press_kits/2011/graphexpo2011/HP_Designjet_L25500.pdf