Term
| Describe what an impact printer does. |
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Definition
| Pins on the printhead pokes an image into the paper. |
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Term
Describe how an inkjet printer works.
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Definition
| The print head goes back and forth and sprays ink, in a controled way, to form the print. |
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Term
| Describe how a laser printer works. |
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Definition
| The paper travels over the transfer corona wire and pulls the ink down to the paper. The paper then goes through the fuser and melts to the paper. |
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Term
Describe how a thermal printer works.
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Definition
| When thermal paper passes over the thermal print head, the paper turns black where it was heated, turning it black and makes the image. |
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Term
| Describe how a plotter works. |
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Definition
| It drags a pen across the paper and makes an image. It is very slow. |
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Term
| Name and describe the six components in a bubble jet printer. |
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Definition
Print head - what puts the ink on the paper Carriage - what holds the ink, moved by a belt and motor Paper feeder - brings paper into the printer Pickup rollers - grabs the paper Separator pads - makes sure that only one paper goes in at a time Pickup stepper motor - pulls the paper to the paper tray |
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Term
Describe what the following circuits do. Printer control circuit Printer power circuit Printer interface circuit |
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Definition
Power circuits - connects the printer to electricity Control circuits - circuit board that tells the printer what to do Interface circuit - connects the printer to the USB connector or LAN |
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Term
Describe what the following laser printer componets do: Toner catridge Developer Drum Cleaning blade Laser scanning assembly HVPS |
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Definition
Toner cartridge - holds toner Developer - located inside toner, carries the toner Drum - Holds a static charge when not exposed to light Cleaning blade - scrapes off useful toner to be reused and keeps the drum clean Laser scanning assembly - laser shines on particular areas of the drum to discharge the toner from the drum HVPS - high voltages are needed to energize the charging and transfer corona |
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Term
Describe what the following laser printer componets do: DCPS Paper transport assembly Stepper motor Fusing assembly (or fuser) Primary controller circuitry Ozone filter |
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Definition
DCPS - powers other components of the printer Paper transport assembly - moves paper through the printers Stepper motor - turns the rollers Fusing assembly (or fuser) - fuses plastic toner particles to paper Primary controller circuitry - converts computer data to a language the printer can understand Ozone filter - a chemically reactive gas created by the coronas |
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Term
Name the six steps of the electrophotographic print process and what happens in each step?
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Definition
cleaning - cleans the drum for the next line of printing charging - gives the drum a negative charge to hold the toner writing - a laser writes on the drum, neutralizing the charge developing - the step where the toner gets pulled to the drum transferring - the step where the tone is pulled to the paper fusing - melts the toner to the paper at about 400 degrees F |
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Term
| What are some printer consumables? |
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Definition
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Term
| Name the seven interfaces for a printer and scanner? |
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Definition
1) SCSI
2) Wireless
3) NIC
4) Parallel
5) USB
6) Firewire
7) Serial |
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Term
| How do you calibrate a scanner? |
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Definition
| With calibration software |
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Term
| What are three main types of scanners and how are they different? |
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Definition
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Term
| What are the four steps that technicians use to gather info for printers and scanners? |
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Definition
1) Identify 2) Review device error codes, computer error messages & history 3) Print or scan test page 4) use appropriate generic or vendor specific diagnostic tools including web-based utilities |
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Term
| What are the three steps that a technician should do to analyze collected data for a printer or scanner? |
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Definition
1) Establish probable causes 2) Review service documentation 3) Review knowledge base & define & isolate the problem |
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Term
How would you resolve the following printer problems for a laser printer? Paper jam Blank pages Black pages Frequent black marks Vertical black lines Vertical white lines Output is garbage |
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Definition
Paper jam - find out where the paper got stuck and remove it Blank pages - check the ink, clean the corona wires, check the HVPS Black pages - change the toner cartridge Frequent black marks on paper - clean the rollers or replace the toner cartidge Vertical black lines on paper - clean the corona wire or replace the toner cartridge Vertical white lines on paper - clean the corona wires Output is all garbage - incorrect driver or bad printer interface card |
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Term
| What is the difference between Engine Self Test, Half Self Test, and Secret Self Test? |
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Definition
Engine self-test - tests the print engine but bypasses the printer formatter card Half self-test - performs the engine test but stops half way through to try and help narrow down the problem Secret self-test - puts the printer into maintenance mode |
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Term
| What is print pooling? and What do you need to do print pooling? |
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Definition
| Using multiple printers to print a document. You need a software program called print distributor. |
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Term
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Definition
| The order of the documents that are printing |
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Term
| What is GDI and how is it used? |
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Definition
A microsoft standard for displaying and transmitting graphics. The processing of the graphics to be printed on the printer is offloaded onto the windows GDI system. |
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Term
| What is PCL and how is it used? |
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Definition
Page decription language, developed by HP as a printer protocol and has become a de facto standard for printing. The windows printer driver simply passes through GDI commands with very little modification. |
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Term
| What is Postscript and how is it used? |
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Definition
Is a PDL and programming language used primarily in the electronic and desktop publishing areas. Reduces the CPU workload involved in printing documents by transferring the work from the computer to the printer. |
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Term
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Definition
| What You See Is What You Get, used in computing to describe a system in which contect during editing appears very similar to the final poduct. |
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