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CompTIA A+ 220-1101 > Printers (Chapter 4) > Flashcards

Printers (Chapter 4) Flashcards

1
Q

Which two types of printers are referred to as page printers and why?

A

Inkjet and laser
They receive their print jobs one page at a time instead of one line at a time.

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2
Q

Electrophotograpic (EP) printers

What is toner?

A

A black carbon substance mixed with polyester resin that is sensitive to electrical charges in laserjet (EP) printers

The photosensitive drum attracts the toner

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3
Q

Electrophotograpic (EP) printers

What happens to toner during the printing process?

A

It becomes attracted to the print drum and melts onto the paper

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4
Q

Electrophotograpic (EP) printers

What is the role of the developer (or carrier) in a toner cartridge?

A

Holds and transfers toner

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5
Q

Electrophotograpic (EP) printers

What is a(n) (EP) print drum?

A

A drum coated with photosensitive material

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6
Q

Electrophotograpic (EP) printers

What happens to leftover toner on the drum?

A

Its scraped off the drum by the cleaning blade

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7
Q

Electrophotograpic (EP) printers

How does the laser scanning assembly help produce an image?

A

It scans light (exposes) onto the drum as it rotates causing toner to stick to those areas

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8
Q

Electrophotograpic (EP) printers

What kind of power does EP require?

A

High-voltage
The HV power supply (HVPS) energizes the charging corona and the transfer corona.

Other components can’t use this high of power

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9
Q

Electrophotograpic (EP) printers

Besides the HVPS, what other kind of power supply does EP use?

A

DC power supply (DCPS)
Converts house current into the voltages:
+-5VDC (for circuitry)
+23VDC (for motors)

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10
Q

Electrophotograpic (EP) printers

What is the purpose of registration rollers?

A

They sync the paper movement with the cartridge so that its only fed when the cartridge is ready

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11
Q

Electrophotograpic (EP) printers

What is the purpose of the stepper motor?

A

Moves accurately in small increments, powers/operates rollers (paper transport and fuser)

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12
Q

Electrophotograpic (EP) printers

How does toner go from the drum to the paper?

A

The transfer corona assmebly transfers a HV charge to the paper which pulls off the toner.

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13
Q

Electrophotograpic (EP) printers

What does a fuser do?

A

Uses two rollers to apply pressure and heat to fuse the toner to the paper

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14
Q

Electrophotograpic (EP) printers

What is the role of the printer controller?

A

Converts signals from the computer into signals the assemblies in the printer can use. This is called rasterizing.

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15
Q

Electrophotograpic (EP) printers

Why is an ozone filter necessary and where might it be found?

A

High-voltage coronas create ozone gas that can damage the printer over time. Mostly present in older printers that have corona wires isntead of rollers.

Rollers work via direct contact instead of an ionized field with a wire

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16
Q

Electrophotograpic (EP) printers

What happens during the charging step of the EP process?

A

The charging corona applies a strong negative charge to the drum.

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17
Q

Electrophotograpic (EP) printers

What are the seven major steps in the EP process?

A
  1. Processing - Receive and generate/raster image into memory
  2. Charging - Charging corona charges drum
  3. Exposing - Laser scans the drum w/ info from controller
  4. Developing - Toner is transferred from developing roller to drum
  5. Transferring - Corona roller applies charge to paper, pulls toner from drum
  6. Fusing - Fuser melts and presses toner into paper
  7. Cleaning - Docotor blade scrapes off remaining toner on drum and into waste box. A lamp clears the charge from the drum.
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18
Q

Electrophotograpic (EP) printers

Where is the developing roller located and what does it do?

A

Inside the toner cartridge. It picks up toner from the reservoir and transfers it to exposed areas (less strong negative) on the drum.

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19
Q

What happens during the cleaning (final) step of the EP process?

A

A rubber blade scrapes off remaining toner from the drum which is disposed into a waste receptacle. Then, a lamp removes the charge from the drum.

20
Q

Are all types of filament compatible with all 3D printers?

A

No. PLA and ABS have different characteristics. To prevent ABS from shrinking, heated plates are recommended.

21
Q

What are the two types of 3D printers?

A

Filament (FDM) and resin (SLA/DLP)

22
Q

How does a resin 3D printer create objects?

A

It uses a reservoir of liquid resin and hardens it with a UV light.

23
Q

How does resin 3D printer quality and speed compare to filament?

A

It prints finer details but is slower.

24
Q

What is a printer interface?

A

The hardware and software that allows the printer to communicate with a computer. The hardware interface can also be called a port (USB, ethernet).

25
Q

What two things is an interface compromised of?

A

Interface type/hardware (USB, WiFi) and software (print driver)

26
Q

What are the three most common printer communication languages?

A

PostScript, Printer Control Language (PCL) and Graphics Device Interface (GDI)

27
Q

What is the purpose of a page-description language?

A

To describe the page being printed by sending to commands to the printer controller. This includes the text, margins and other settings.

28
Q

What is a possible result of using the wrong page-description language?

A

Prints garbage or nothing

29
Q

What are the different application uses for PS and PCL?

A

PostScript is more graphics-focused (developed by Adobe).
PCL is used for standard office printing and is text-focused.

30
Q

Where and how is GDI processed?

A

By a Windows computer CPU. It’s a component of the OS. The image is rendered to a .bmp and then sent to the printer.

This allows the printer to have less power requirements and be cheaper

31
Q

What is the main advantage of page-description languages?

A

It transfers some processing load to the printer instead of the computer. This is especially helpful for graphics heavy and large documents (its faster that way).

32
Q

Which type of printer will sometimes need to be calibrated?

A

Inkjet

33
Q

Which printer can print on multipart forms (ex. triplicate)?

A

Dot-matrix or daisy-wheel since they are impact printers

34
Q

What is the polarity of the following components?
Drum (exposed areas)
Toner particles
Transfer corona roller

A

Drum (exposed areas): Positive
Toner particles: Negative
Transfer corona: High positive charge

The primary corona roller applies a negative charge to whole drum first.

35
Q

What does a printer spooler do?

A

It stores print jobs in a queue and sends them to the printer in the correct order

36
Q

What protocol does scan to folder use?

A

SMB (Server Message Block)

37
Q

Can jams be caused by the type of paper used?

A

Yes.

38
Q

What is the cause/solution to white stripes with a laser printer?

A

Transfer corona roller
May have debris resulting in toner missing in certain areas.

39
Q

What is the cause/solution to a blank page with a laser printer?

A

Corona assemblies
Toner didn’t get moved to the paper or the drum
The feeder mechanisms are functioning

40
Q

What is the cause/solution to smearing toner with a laser printer?

A

Fuser
The toner has not been properly heated and compressed onto the paper.

41
Q

What is the cause/solution to a backed-up print queue?

A

Caused by a large number of print jobs/out of memory. Enable print spooling.

42
Q

What does collate mean?

A

All the pages in the document print first. Then the second copy begins.

43
Q

Which category of printer is the quietest?

A

Thermal

Yes, even quieter than modern laser

44
Q

What is the final step in using a maintenance kit on a laser printer?

A

Reset the page counter

45
Q

What voltages does a printer use?

A

-5V, +5V, +24V

CompTIA A+ 220-1101 (11 decks)

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