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External Hardware - Part 3
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- 1Laser Printer Characteristics Part 1Speed (pages per minute) - more expensive printer = higher PPM
Memory - can be upgraded with modules. Hard drives can store fonts and documents
Resolution (dots per inch) - higher resolution = better quality - 2Laser Printer Characteristics Part 2Duplexing - printing on both sides.
All-In-One Printers - fax, copy, scan, print
Media Support - matte/satin/glossy finished paper; cover and card stock; transparencies
Consumables - toner cartridges, print drums and fusers - need to be replaced occasionally - 3Laser Printer PurposeTo print media (e.g. text or pictures) onto paper in such a way that it doesn't come off; more advanced machines can scan, copy and fax
- 4Laser Printer SuitabilityLarger, free-standing models with multiple trays are best suited for commercial use or in education. Smaller printers can be used domestically, but toners are often expensive and can run out quite quickly if the printer is used every day
- 5Laser Printer Principles of Operation Part 1Stream of data into printer from computer
An electronic circuit in printer sorts out data and makes sure it'll be printed correctly
Circuit activates a corona wire (high-voltage wire giving static charge to everything around it)
Corona wire charges photoreceptor drum positively - 6Laser Printer Principles of Operation Part 2Simultaneously, circuit activates laser which 'draws' image of page onto drum.
Laser is fixed, but beam bounces off a moving mirror that scans it over drum
Where laser hits drum, positive charge is negated
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- A level Computing Fichas sobre External Hardware - Part 3, creado por Jeffrey Stanley el 27/04/2017.
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- Jeffrey Stanley
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