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Printer cables

Printer cables. Maximum length for parallel cable is 15 feet. (some say 10) 25-pin DB male connector on cable connects to DB female connector on motherboard 36-pin Centronics connector on printer end of connecting cable . LPT Ports. Parts of a laser printer.

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Printer cables

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  1. Printer cables • Maximum length for parallel cable is 15 feet. (some say 10) • 25-pin DB male connector on cable connects to DB female connector on motherboard • 36-pin Centronics connector on printer end of connecting cable

  2. LPT Ports

  3. Parts of a laser printer • Photosensitive drum- reacts to light • holds a charge except where it is exposed to light • Paper transport- 4 types of rollers that move paper through printer • This is where most paper jams occur! • Primary corona- main corona • located inside toner cartridge • uniformly charges drum to -600V

  4. Parts cont. • Transfer corona- transfers image from drum to paper • transfer corona charges the paper • the charged paper pulls toner from drum to paper • Fusing roller- permanently melts toner to page • this is why laser printer pages are hot • Controller- includes printer RAM • Power supply- high-voltage AC and DC

  5. Steps in laser printing • Cleaning • Before page is printed, remnants of previous print are swept away • Rubber blade sweeps left-over toner away • Fluorescent lamp removes any remaining electrical charge on drum • Conditioning • The primary corona (AKA main corona) wire uniformly charges drum to -600V

  6. Steps cont. • Writing • image of page is created on drum • where laser beam contacts drum, the charge is reduced to -100V from -600V • the controller loads sheet of paper to the registration roller of the paper transport system • Developing • Creating print image on drum • the iron particles in toner cartridge are attracted to the areas of drum exposed by laser

  7. Steps cont. • Transferring • image transferred to paper • sheet of paper at registration roller is given a positive charge • negatively charged toner on drum is attracted onto positively charged paper • Fusing • fusing rollers apply heat and pressure to toner • toner melts and permanently bonds to paper

  8. 1. Cleaning 2. Conditioning 3. Writing 4. Developing 5. Transferring 6. Fusing California Cows Won’t Dance The Fandango! Remember…steps of laser print

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