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Printers
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Printers

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  1. Printers Unit objectives: • Compare and contrast printing technologies • Install printers • Optimize printing and perform routine maintenance tasks for printers • Troubleshoot printer problems

  2. Topic A • Topic A: Printing technologies • Topic B: Printer installation • Topic C: Printer optimization and maintenance • Topic D: Printer troubleshooting

  3. Dot-matrix printer • Can print multipart forms • Slow and noisy compared to other printer types • Impact printer • Use mechanical means to press ink onto a page • Near letter quality (NLQ)

  4. Dot-matrix printer components • 9- or 24-pin print head • Pins pushed forward in patterns to strike ink ribbon • 9-pin quality not as good as 24-pin • Tractor feed and friction feed • Horizontal and vertical perforations in paper • Banners • Preprinted forms require careful alignment • Friction feed primarily for envelopes and single-sheet papers

  5. Dot-matrix printer connections • Serial • Parallel • Rare network interface • Some have both serial and parallel

  6. Dot-matrix options • Font card slots • Memory • Paper feeders

  7. Other impact printers • Daisy wheel • Band printer

  8. Activity A-1 Examining the dot-matrix printing process

  9. An inkjet printer • Ink dispersion • Forces ink through nozzles • Nozzles are 50 to 60 microns in diameter • Two methods: • Thermal bubble • Piezoelectric bubble

  10. Inkjet process • Thermal bubble technology • Piezoelectric technology • Ink cartridges

  11. Inkjet cartridge print heads • Print head part of cartridge • New ink cartridge = new print head • Makes cartridge more expensive

  12. Inkjet print quality • Standards • Laser printer for text • Darkroom photographs for graphics • Affected by: • Resolution (dpi) of printer • Quality of paper • Quality of ink if printed page gets wet • Dithering, also known as half-tones

  13. Straight-through paper path

  14. Curved paper path

  15. Photo printers • Good print quality • Quality not quite as good as that of chemically produced prints • Use special photo paper • Some printers allow you to print CD/DVD labels

  16. Printing onto a CD

  17. Activity A-2 Examining how inkjet printers work

  18. Laser printer • Standard of quality for other printer types • High-quality, high-volume • Black-and-white, and color • Dropping in price • Consumables can cost as much as printer

  19. Laser printer components • Toner cartridge • Laser scanning assembly • Power supplies • Paper control and transport assembly • Transfer corona assembly • Fusing assembly • Electronic control package

  20. Toner cartridge components • Hopper filled with toner • EP drum • Blade to remove used toner • Corona charging assembly

  21. Laser scanner assembly • Laser • Mirror • Lens, or lenses

  22. Power supplies • High-voltage power supply (HVPS) • Converts standard 120 volt AC to high-voltage electricity used by EP process • DC power supply (DCPS) used to power components that don’t require high voltages • For example, laser & fuser • +5V and -5V for the printer’s logic circuitry • +24V for the paper transport motors

  23. Paper control and transport assembly • Paper moves through series of rollers • Rollers • Some guide paper • Some apply pressure to fuse toner

  24. Transfer corona assembly • Primary charge roller charged by HVPS • Primary charge roller charges paper to accept toner • Static charge eliminator strip drains charge • Creates ozone – can cause respiratory illness • Laser printers employ ozone filters

  25. Fusing assembly • Composed of rollers and heating lamp • Applies heat and pressure to adhere toner to page

  26. Electronic control package • Also known as “printer control circuitry” or “main logic assembly” • Communicates with • Printer memory • Control panel • Computer

  27. Laser printing process continued

  28. Laser printing process, continued • Cleaning and erasing • Charging or conditioning • Writing or exposing • Developing • Transferring • Fusing • Note: Some sources place the cleaning and erasing stage at the beginning of the process. Others place it at the end of the process. In either case, it prepares the drum for receiving and printing the next image.

  29. Activity A-3 Examining how laser printers work

  30. Other printer types • Solid-ink • Dye sublimation • Thermal • Thermal wax transfer • Direct thermal • Thermal autochrome

  31. Plotter • Creates line images • Uses pens • Often available in large format for CAD drawings • Draws smooth lines and curves

  32. Additional printer types • Snapshot printers • Large-format printers

  33. Activity A-4 Identifying other printer technologies

  34. Topic B • Topic A: Printing technologies • Topic B: Printer installation • Topic C: Printer optimization and maintenance • Topic D: Printer troubleshooting

  35. Main Windows print processes • Client – includes GDI • Spooler • Printer – print language is translated to hardware directions for printing the job

  36. Activity B-1 Examining the Windows printing process

  37. Inkjet printer installation • Most local printers connect via USB • Windows autodetects and installs drivers • Can install additional software from manufacturer

  38. Ink-level monitoring utility

  39. Printer interfaces • USB • Parallel • SCSI • Serial • Wired or wireless Ethernet network connections

  40. Inkjet communications interfaces Parallel interface USB interface

  41. Configure the connection type • SCSI — Assign a unique device ID • Parallel — Specify the correct LPT port • Usually LPT1 • Serial — Specify the correct COM port • Usually COM2 • COM1 used for modem

  42. Port identified for the printer

  43. Installing an inkjet printer • Connect the printer to a computer, using the correct interface • Plug the printer in • Power it up • Windows will probably recognize the new device and install drivers for it • If drivers aren’t installed automatically, do it manually with materials that shipped with the printer

  44. Upgrading a device driver • Use Device Manager utility • Follow prompts in wizard or use printer installation file • Configure options for best performance

  45. Laser printer setup • Unpack from packaging • Remove all packaging materials and tape • Install toner cartridge • Remove tape insert from toner • Rock from side to side • Might need to install drum or other components

  46. Printer interfaces • Parallel • SCSI • USB • Serial • IEEE 1394/FireWire • Wired or wireless Ethernet network

  47. Communications interfaces

  48. Installing a printer • Connect the printer to the network or a computer, using the correct interface • Plug the printer in • Power it up • Windows will probably recognize the new device and install drivers for it • If drivers aren’t installed automatically, do it manually with the materials that shipped with the printer

  49. Installing a network printer in Windows 7 • In Windows 7, open Devices and Printers • Click Add a printer • Click Add a network, wireless or Bluetooth printer • Select the desired printer and click Next, or click The printer that I want isn’t listed • If prompted, click Install driver • Enter a name for the printer and click Next • If desired, set as the default printer and print a test page • Click Finish

  50. Installing a network printer in Vista • Open Printers • Click Add a printer • Click Add a network, wireless or Bluetooth printer • Select the desired printer and click Next, or click The printer that I want isn’t listed. • If the printer isn’t listed, you can: • Browse for it • Enter its share name • Enter TCP/IP address • Enter host name • If the print drivers are available on the network, Windows will prompt you to install them. Click Install driver. • Enter a name for the printer and click Next • If desired, set as the default printer and print a test page • Click Finish