printers

Question 1

laser printer

Answer 1

Combine a laser, high voltage, charged ions,
powdered ink, heat, and paper.
pros: very high quality, fast printing speeds
cons: very complex, many moving parts, requires on printer memory and messy inside

Question 2

imaging drum

Answer 2

Image is drawn onto a photosensitive drum
Picks up toner - Transfers toner to the paper
Can be separate from the toner cartridge or combined

Question 3

fuser assembly

Answer 3

Heat and pressure - Melt plastic toner powder
Permanently bond toner to paper

Question 4

Transfer belt and roller

Answer 4

Color laser printers. CYMB
Four separate toner cartridges
Image is transferred from all cartridges to the single belt and then to a single transfer roller

Question 5

Pickup rollers

Answer 5

Pickup paper - Should be a single page at a time
Problems if no paper is picked up or multiple sheets are picked
Should be periodically cleaned or replaced

Question 6

Separation pad

Answer 6

Pull just the top sheet from the paper tray
Not multiple sheets
Small and inexpensive - Easy to clean or replace

Question 7

Duplexing assembly

Answer 7

Printers usually print on a single side not both sides simultaneously
Printing on both sides is a two step process
You need mechanisms to “flip” the page automatically
Can be built-in to the printer or available as an add-on

Question 8

laser printing steps

Answer 8

1. processing 2. charging 3. exposing 4. developing 5. transferring 6. fusing 7. cleaning

Question 9

Processing

Answer 9

build the entire page in memory

Question 10

Charging

Answer 10

prepare the drum with a negative electrostatic charge

Question 11

Exposing

Answer 11

write the image with the laser

Question 12

Developing

Answer 12

add toner to the charged areas of the imaging drum to the paper

Question 13

Fusing

Answer 13

heat and pressure

Question 14

Cleaning

Answer 14

remove excess toner

Question 15

Replacing the toner cartridge

Answer 15

Look for the messages
– Low doesn’t mean empty
The toner can also contain the OPC (Organic Photoconductor) drum
Power down printer and remove packing strips from the new drum and replace it with the old

Question 16

Laser printer maintenance kit

Answer 16

replacement feed rollers, new fuser unit, etc. check the printer’s page counter to see when to perform maintenance. power down and replace components, reset the page counter when done

Question 17

Laser printing calibration

Answer 17

different toner cartridges print with different densities, laser printer calibration can adjust the density, can be automated or a manual process

Question 18

Laser printer cleaning

Answer 18

water + IPA
outside: damp cloth
inside: wipe dust, dont use normal vacuum or compressed air, clean rollers with IPA

Question 19

Inkjet (ink-dispersion) printer

Answer 19

Relatively inexpensive technology, Quiet, High-resolution
Expensive ink, Proprietary, Eventually fades, Clogs easily

Question 20

Ink cartridge

Answer 20

Place drops of ink onto a page
CMYK - Cyan, Magenta, Yellow, Key (black)

Question 21

Print head

Answer 21

Some consumer printers integrate the print head
into the ink cartridge
Others separate the ink cartridge from the print head

Question 22

Feed rollers

Answer 22

Pick up and feed paper through the printer
Duplexing

Question 23

Carriage and belt

Answer 23

Ink cartridges are moved over the paper
Belt moves the carriage back and forth

Question 24

Inkjet printer calibration

Answer 24

Align nozzles to the paper
Printer includes a calibration option

Question 25

Cleaning print heads

Answer 25

Small droplets of ink - And small holes in a print head Clogged heads is a big issue – Output has streaks or sections of missing color Some print heads/cartridges can be removed

Question 26

Replacing inkjet cartridges

Answer 26

Usually separate colors Takes seconds to replace Recycle the empty cartridge - All plastic

Question 27

Clearing jams

Answer 27

Remove tray paper Remove paper from the path Check for any scraps of paper