Interfacing HP printer cartradge with Microcontroller LPC1768

Hi,
I want to interface HP2570 print cartridge with LPC1768. I have read some articles on net but for this i didn't find any information.
As per my knowledge Printer cartridge has nozzles which we have to activate by giving activation voltage to it. so it will throw the ink through that nozzles.
Also it requires dot matrix font stored in micro controller for character printing.
But I am not able to identify its connection details. Can any one help me out for getting those connections and guiding me.

thanking you

Don't know, myself, but perhaps this will give you some ideas about how to reverse engineer it:

* http://spritesmods.com/?art=inker

BTW: I found this by Googling "electronically firing an inkjet cartridge"

thank you.... I think It will give me idea for reverse engineering.....