HP Designjet 250c Service Manual - Page 53

330 350C Color Plots on Glossy Paper The characteristics for color plots on glossy media are the same as for color plots on paper, except for the passes per swath (#), pass advance (swaths) and bidirectional abilities: Passes per Swath (#) Pass Advance (swaths) Bidirectional Fast 4 ∼ 0.25 No Normal 4 ∼ 0.25 No Best 6 ∼ 0.167 No Servicing the Cartridges Service Station The service station is based on that of the DesignJet 650C, with some differences. D The service station is easier to access and remove, and is replaceable as one unit. D The absence of a drop detector implies a different cartridgeĆmaintenance algorithm to guarantee correct nozzle conditions. The plotter warms the nozzles and spits ink: - Before each plot. - After each cartridge change. - While printing, depending on: cartridge, humidity, temperature, and plot ink density. D The ventilation holes, which were located on the serviceĆstation sled on the DesignJet 650C, are now located on the ink separator to prevent them from becoming clogged. Spittoon A single, redesigned spittoon is located on the right side of the plotter. Primer The plotters feature a manual primer, based on that of the DeskJet 1200, instead of the automatic one of the DesignJet 650C. (See ' User's Guide, w Cleaning the cartridge nozzles.) D A bellows assembly provides a vacuum to suck ink from the nozzles. The suction tubes have a wider diameter than those of the DesignJet 650C, to help prevent clogging. D An ink separator isolates the bellows from the cartridges, preventing ink contamination of the bellows. Although the primers for the DesignJet 230/250C and DesignJet 330/350C look identical, their characteristics are different. Installing the incorrect primer can damage the cartridges or reduce the servicing of the cartridges. For the correct part numbers for the primers ' chapter 10. C4699Ć90000 Functional Overview 5Ć11