22 Aug 2009 7 Preventive Maintenance. For information about Using this Manual, please refer to the next page. HP Designjet T1120 Printer 24 inch (Model CK837A) . See Line. Sensor (T1120/T1120ps/T620) on page 6-161. Do not remove an IC or a printed circuit assembly (PCA) from its conductive foam pad or.Read these instructions carefully What you will need for this procedure. • Because the printer is heavy, you may need three people to unpack it. When. Manuals or user guides for your HP DesignJet T1120 HD Multifunction Printer series. HP Designjet T1120 Printer Assembly Instructions: English. HP Designjet T1120 Printer Series User's Guide: English. Note: Use the most current version of the reader for viewing these PDF user guides by clicking the "Adobe" link below.