● The Ink Cartridge Cover Sensor senses whether the Ink Cartridge Cover is open or closed. Opening the Ink Cartridge Cover starts ink cartridge replacement automatically. The sensor is hosted in the printer chassis. ● The Central Cover hosts the Top Cover Sensor to sense whether the Top Cover is open or closed. IMPORTANT: Be careful to avoid damaging the sensor while removing the Central Cover. See Central Cover on page 166 . ● The Output Tray Sensor senses whether the Output Tray is open or closed. To avoid paper jams while printing on roll paper, the tray should be closed. IMPORTANT: Damage to the covers can cause the sensors to malfunction.
Removal and installation In order to proceed with the removal and installation of the covers its important to bear in mind their cosmetic aspects, some surfaces of the covers have a glossy finish, which requires maximum attention as they are very delicate and susceptible to scratches and finger marks. It is recommended that you use gloves for any service operation involving the covers. Due to the layout of the covers, it is important to bear in mind that some parts require removal before you can remove a specific cover. ● Right Cover requires Front Cover removal. ● Left Cover requires Front and Ink Cartridge Cover removal. ● Roll Cover requires Right and Left Cover removal.
● Top Cover requires Front Panel assembly removal. ● Central Cover requires Right Cover and Left Cover removal. Related tests Sensor tests for the Top Cover, Ink Cartridge Cover, and Output Tray operation. See Diagnostics menu on page 100 . Electronics Other than the sensor boards, there are no electronics related to this subsystem. Printhead health systems: Service Station, Primer system, and Left Spittoon Functionality The service station is responsible for printhead maintenance. It takes action to clean ink residues and service ink nozzles, and prevents ink from drying in critical zones by capping the printhead once printing has finished.
The Primer system provides the necessary air pressure to the printhead to perform initialization. This system also provides pressure to the necessary printhead service operations (by boosting air which pushes ink out through the printhead nozzles, cleaning residues of dried ink and other particles). The Left spittoon is a small container located to the left of the print-zone area, this is the area used by the printhead to “spit” a small amount of ink at the end/beginning of the printing swath in order to ensure correct nozzle heath for left-to-right printing. 6 Chapter 1 Printer fundamentals ENWW