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1
Q

What are two major types of impact printers?

A

Dot Matrix and Daisy Wheel p.. 448

2
Q

What does the print head do in a daisy wheel printer?

A

It rotates teh daisy wheel p. 448

3
Q

What is a major disadvantage of dot matrix printers?

A

THe quality of print. p. 450

4
Q

What does the maintenance station do in buble jet printers?

A

The print head (small nozzles) rests when the printer isnt printing and it keeps the print head in working order. p. 451

5
Q

What are the major components of a Bubble JEt printer?

A

Print Head(Ink cartridge), head carriage,carriage belt and stepper motor and stabelizer bar. p. 451 Control, interface, and power circuitry p. 457

6
Q

What is the function of printer control circuits?

A

To run the stepper motor on Bubble jet printers. P. 457

7
Q

Describe print buffer memory.

A

A small amount of memory (512K to 16MB) p. 457

8
Q

What do power circuits do in Bubble Jet printers?

A

Converts 110 or 220V into voltages the printer uses (usualy 5 or 12V) p. 457

9
Q

What are two examples of printers that are considered page printers?

A

Bubble Ink Jet and Laser p. 458

10
Q

DEscribe the EP process.

A

The process uses a combination of static electric charges, laser light, and black powder ink (toner) p. 459

11
Q

What does the High Voltage Power Supply do?

A

The HVPS provides the high voltages used during the EP process in a laser printer. P. 460.

12
Q

What are the two types of rollers used in laser printers?

A

Registration Roller and feed roller (paper pickup) p. 461

13
Q

What does the transfer Corona Assembly do?

A

It puts the toner on the paper. After the laser writes the images on the drum the toner sticks to the exposed areas. The transfer corona assembly is given a high voltage charge which is transferred to the paper. p. 462

14
Q

What are two types of Transfer Corona Assemblies?

A

Those that contain a corona wire and those that contain a transfer corona roller. p.462

15
Q

What does the fuser do?

A

EP printers used two rollers that apply pressure and heat to fuse the plastic toner particles to the paper. p. 463

16
Q

Define Rasturizing.

A

When the circuit board converts signals from teh computer into signals for the various assemblies in the laser printer. p. 463

17
Q

What are some reasons a transfer corona wire is not used anymore?

A

Ozone buildup. p. 464 and slower speeds p. 463

18
Q

What are the 6 steps in the EP process?

A

cleaning, charging, Writing, Developing, Transferring Fusing p. 464

19
Q

Describe the writing step in the EP process.

A

The laser is turned on and scans the drum form side to side flashing on and off according to the bits of info the printer controller sends it. as it comunicates with the bits of the image. Whereever the laser touches thedrums charge is reduced from -600v to -100v. p. 465

20
Q

Describe the Developing Step in the EP process.

A

The toner is transferred to the areas that were exposed int he writing step. p. 466

21
Q

What does the developing roller do in the EP process.

A

In the development step the roller acquires a -600v charge from the HVPS. The toner sticks to the roller because it had been reduced to -100 volts. p. 467

22
Q

Describe the transferring step in the EP process.

A

The corona wire/roller acquires a strong positive charge 600v and applies the charge to the paper. The paper being charged pulls the toner from the photosensitive drum. p. 467

23
Q

How do thermal printers work?

A

By using a print head the width of the paper. They print on special waxy paper that turns black when heat is passed over it. p. 469 Another type uses a heat sensitive ribbon instead of heat sensitive paper.

24
Q

What is a printer’s interface?

A

A collection of hardware and software that allows the printer to comucate with a computer. (commonly called a port) p. 470

25
Q

What are some types of interfaces?

A

Serial, parallel, USB, Ethernet, and wireless. p. 471