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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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Presentation Transcript
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



Parts of a laser printer
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


Parts cont
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


Steps in laser printing
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


Steps cont
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


Steps cont1
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


Remember steps of laser print

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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