HP Designjet 2800/3800cp Service Manual - Page 323

D Service Station Interconnect: This small PCA provides connectivity between the main PCA and the sensors and stepper motors on the right hand side. It is located underneath the service station. D Refill Station Interconnect: This small PCA provides connectivity between the main PCA and the sensors and stepper motors on the left hand side. It is located on the left hand side plate. Y-Axis Assembly The Y-axis Assembly provides accurate left and right motion to the printheads. It aligns the printheads to the refill assembly and the service station. The Y-axis assembly contains the following: D Carriage Assembly. D Y-axis Belt. D Y-axis Belt Tensioner Holder. D Y-axis Motor Assembly. D Encoder Strip. D Trailing Cable Carriage The carriage assembly is installed onto slider rods with three bushings, these are located underneath the carriage assembly. The carriage assembly holds the four printheads. D It warms the printheads and fires the nozzles. D It regulates the distance between the printheads and the media by means of a screw and nut system located at the rear. It also contains the carriage PCA, temperature and air humidity sensors, the line sensor, encoder strip sensor and the trailing cable. The carriage assembly also pulls the media cutter across the media. Y-axis belt and Y-axis belt tensioner The Y-axis belt is secured to the carriage assembly by routing it through a labyrinth located under the carriage assembly. The Y-axis belt is tensioned with a spring and wedge clip system located at the right side of the printer. The belt is driven by the Y-axis motor assembly Y-axis motor assembly The Y-axis motor assembly is secured to the slider rods on the left side of the printer and contains a dc motor. The grounding of the encoder strip is provided by a metal strip which is secured to the Y-axis motor assembly. 10-4 HP DesignJet CP Series printers Functional Overview