This is a certified, tested, brand new, drop-in replacement for service part numbers. This drive is guaranteed to work with any T1200 or T770 plotters, including the following models. HP Designjet T770 44-in Printer (CH539A). HP Designjet T770 44-in Printer with Hard Disk (CN375A).
HP Designjet T770 24-in Printer (CQ305A). HP Designjet T770 24-in Printer with Hard Disk (CQ306A). HP Designjet T1200 44-in Printer (CH538A).
HP Designjet T1200 44-in PostScript Version Printer (CK834A). After your new hard drive is installed, you can use the flash drive to upgrade your plotter to latest firmware rev TT6-TTAJ_8_02_03.3. Simply install the new hard drive, boot up the plotter, plug in the flash drive, and follow the on-screen instructions on the printer to upgrade its firmware.