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56 Cards in this Set
- Front
- Back
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What are the primary factors that motivate printer technology?
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Speed and Resolution
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What are three process components of printers and scanners?
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Memory, Drivers, and Firmware
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What are the most common types of printers?
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Impact or dot-matrix
Inkjet Laserjet Dye-sublimation Thermal Solid Ink |
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What are two types of Thermal printers?
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Direct thermal
Thermal wax transfer |
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What is the defining technology process that laser printers use to output text and graphics on paper?
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Electro-photographic Imaging
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What are the more common printer languages for consumer printers?
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ASCII
PostScript PCL GDI |
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What are the more common physical methods for connecting a printer to a computer?
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Parallel port - IEEE1284
Serial port USB Firewire Local Area Network |
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IEEE1284 defines what five modes of operation?
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Nibble
Byte EPP ECP Compatibility |
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What are the six Electo-photographic Imaging processing steps a laser printer performs?
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Clean the Drum
Charge the Drum Write the Image Develop the Image Transfer the Image Fuse the Image |
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What are the two primary steps performed during the Drum Cleaning process in a laser printer?
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Remove all residual toner
Remove any electrical charge |
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How is the Drum Charging process performed in a laser printer?
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The Primary Corona wire applies a uniform negative charge between 600 and 1000 volts to the surface of the drum.
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Describe the Write and Develop process of a laser printer.
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The laser writes a positive charge image, ≈ 100 volts negative, on the drum surface. The charged image on the drum will attract the more negatively charged toner particles, ≈ 200 to 500 volts negative, to develop an image on the drum surface.
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Describe the Image Transfer process in a laser printer.
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The Transfer Corona wire applies a positive charge to the paper. The negative charged toner image on the drum is transferred to the paper by electrostatic attraction.
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Describe the Fuser process in a laser printer
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The fuser process fixes the toner to the paper by passing the paper with the toner image between a pressure roller and heat roller. The pressure roller presses the paper from the bottom and the non-stick heat roller from the top to melt the toner to the paper. Then, a static charge eliminator removes the charge on the paper.
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Describe the function of the Raster Image Processor chip (RIP) in a laser printer.
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RIP takes the digital information from the computer about the fonts and graphics for a page and converts it to a rasterized image of dots to be printed.
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In terms of a laser printer, what is RET?
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Resolution Enhancement Technology. Enables the printer to insert smaller dots among characters to smooth out jagged curves to create a better quality image.
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What does the Microsoft Windows operating system consider a "printer"?
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The Windows operating system considers a "printer" to be a program that controls one or more print devices.
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How do you open the Add Printer Wizard?
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From the desktop select;
>Start >Settings >Printers and Faxes >Add Printer |
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What is the function of a printer driver?
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Interprets printing command made by the operating system
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What is the function of printer memory?
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Stores pending print task from the computer to include page information and associated elements.
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What is the purpose of firmware in printers and scanners?
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To control the hardware
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What materials are used to make toner for a laser printer?
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A polymer bonded to Iron Oxide particles.
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What is the purpose of the iron oxide particles in toner?
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Give the toner the ability to take on a negative charge as part of the laser printing process.
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Where is the photosensitive drum usually located in a laser printer?
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In the toner assembly
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To setup a cleaning procedure for a laser printer, what is the primary source of information?
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The Manufacturer's maintenance guidelines.
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What type of alcohol can be used to clean the fuser assemply or - if necessary - the transfer corona?
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90% or better denatured alcohol
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What is one of the most important troubleshooting steps you can perform in evaluating poor print output from a printer?
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Perform a diagnostic print page
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How can a diagnostic print page be generated from a printer?
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Usually by holding down the On Line button dur
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If a laser printer printout is blank, what is the most likely problem.
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The printer is out of toner.
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If a laser printer printout is blank and the printer does have toner, what would be the next logical step(s)?
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Perform a diagnostic print page. If that is blank, remove the toner cartridge and examine the drum for an image. If present, suspect a bad HV power supply or transfer corona. Then, consult the manufacturer's guide for assistance.
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What does a dirty appearence printout from a laser printer usually indicated?
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A dirty fuser roller
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What is the most likely cause of ghosting images on a laser printer printout?
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Imaging drum did not fully discharge, or the cleaning bar my be worn.
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What action(s) could correct undesired vertical white lines in a laser printout?
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Try shaking the toner cartridge to evenly disperse the toner, especially if its low. Or, replace the toner cartridge.
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What action(s) could correct for a blotchy printout?
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Try shaking the toner cartridge, side-to-side, to evenly disperse the toner. Verify the printer is level or if blotch is consistant or regulay, chack the fusing roller or drum for foreign objects.
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What action(s) could correct for spotty laser printouts at regular intervals?
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Check the drum for surface damage and replace it if necessary or check the fuser roller for stuck toner and wipe it of if possible.
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What action(s) could correct for embossed effect on laser printouts?
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Check the pressure roller for a any foreign object. Use 90% denatured alcohol or water and a soft cloth remove it. If the foreigh object is on the drum - replace the toner cartridge. Also, check the contrast control setting - check the manufacturer's guide.
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What action(s) could correct for incomplete characters on laser transparency printouts?
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Try adjusting the the print density.
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What action(s) could correct for a paper jam in a laser printer?
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Refer to the manufacturer's guide for paper jam correction procedures.
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What action(s) could correct for a laser printer that pulls multiple sheet at a time?
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Try replacing the paper with new paper - if this corrected the problem then there may be a humidity problem. Check the separation pad for shiny and well worn - this pad separates the sheets as they are pulled from the tray.
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What are some generaly guidelines for print media for a laser printer?
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Avoid too rough or too smooth paper.
Do not open paper bundles until they are actually needed. Always fan the paper before loading into the tray |
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1). What mechanism is used by most inkjet printer to push ink onto the paper?
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Tiny resistors or electroconductive plates.
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2). In a laser printer, what creates the image on the photosensitive drum?
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The Laser imaging unit
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3). What is the order of the laser printing process?
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Clean, Charge, Write, Develop, Transfer, Fuse
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4). On a dot-matrix printer, what physically strikes the ribbon to form the print image?
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Printwires
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5). What items would be considered the most common consumables for a dot-matrix printer?
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Ribbon
Printer papaer |
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6.) What part in a laser printer must be vacuumed or replaced periodically to prevent damage as result of the action of the corona?
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Oxone filter
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7.) What are the most commonly supported printer connection ports?
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Paralley
USB |
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8.) A standalone printer prints a test page just fine, but your printout is garbled and unreadable what is the probable cause?
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Faulty software configuration
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9.) What printing process technology uses heat sensitive plastic film embedded with various color dyes?
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Dye-sublimation
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What utility would help determine why a print job did not print?
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Print Spooler
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What are the most common major systems/components in a Electro-photographic Imaging printer?
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Toner cartridge
Toner Photosensitive Drum Laser Erase Lamp Primary Corona Transfer Corona Fuser Assemply Power Supplies Gear system or Gearbox System Board Ozone Filter Sensors & Switches |
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Which Electro-photographic imaging print process uses a laser to discharge selected areas of the photosensitive drum to prepare the drum for image development?
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Writing process
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What document provides detailed information about the environmental hazards and disposal methods for replaced consumables & parts?
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( MSDS )
Material Safety Data Sheet |
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What is the essential meaning of "21 ERROR" from an HP LaserJet printer?
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The print image (data) is too complex for the Raster Image Processor (RIP) to handle.
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Why are Laser printers referred to as "Page Printers"?
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They receive their print job instructions one page at a time to form a complete page image on the photosensitive drum.
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In a Electro-photographic Imaging printer, which power supply usually supplies power to the Primary Corona
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The High-voltage power supply
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