HP 1050c Service Manual - Page 291

Functional Overview menus: Back, Enter, Up, Down and Menu. (You can print a demo plot called Menu to get the complete menu tree). n 1 key on the upper right corner is used to switch the power ON and OFF. This key is called soft power ON/OFF in contrast to the hard power ON/OFF switch located at the back of the printer. The beeper is used to provide audible feedback to the user. Ink Delivery System (IDS) The Ink Delivery System (IDS) delivers ink under pressure from the large capacity off-axis ink cartridges via permanently connected tubes to the high throughput printheads for the HP DesignJet 1050C and 1055CM Printers The IDS consists of five major subsystems: n The Ink Supply Station (ISS). n The Tubes System. n The Air Pressurization System (APS). n The Ink Level Sensing (ILS). n The Leak Detect System (LDS). Ink Supply Station (ISS) In the Printer, the ink cartridges reside inside the ink supply station (ISS). This module is situated on the left side of the machine. The ISS includes the plastic housing that surrounds the supplies, the latch mechanism, and the fluid and electrical connections to the Ink Cartridges. It also supports the Air Pressure System (APS), with an air pump and associated tubing, an air relief valve, and a pressure sensor. The APS forms a replaceable module clipped under the ISS. These are the key functions of the ISS: n Ink Cartridges support and location. n Limit creep of cartridge side walls. n Avoid incorrect insertion of colors and inks. n Contain ink from leaks. n Support the Air Pressurization System (APS). HP DesignJets 1050C and 1055CM Printers Service Manual 10-5