explain the machanizam of laser printer?

Answer 1

In brief, a laser beam is turned on to MELT some of the toner module, which will then stick to the paper as a BLACK dot.

Answer 2

well...in short words...
a LASER printer is using a dry process. The toner is a powder which need to be melt/burn into the paper. The toner is NOT ink !!

in a LASER printer you have:
- LASER unit - which contain LASER diode(s), some mirros and lenses, which will create some sort of negative image on the surface of the Photoconductor Drum (located inside the Drum Unit/Imaging unit)

- Drum / Imaging Unit+Main Charger Unit -is where the image is created by the LASER unit and Main Charger Unit.

- Developing Unit - sometimes is part of Imaging Unit/ Drum Unit. Is applying the toner on the surface of that Photoconductor Drum.

- Transfer Assembly - will transfer the (toner) latent image from the Drum Unit on the paper.

- Fuser Unit - will melt/burn the toner into the paper (130 Celsius - 190 Celsius >>> this assembly is HOT)

so...the LASER is NOT burning the toner !!! This is done by the Fuser/Fusing Unit using temperature and pressure.
The toner is a powder NOT ink !!

Sometimes the design of the LASER unit is a L.E.D. LASER bar instead of a much complicated one LASER diode+a polygonal mirror motor.

A color LASER printer is using at least 4 color toner Black, Cyan, Magent and Yellow + 4 Imaging Units and a much complicate transfer unit.

for much friendly details check:
http://computer.howstuffworks.com/laser-printer.htm

Answer 3

Check out this link:

http://computer.howstuffworks.com/laser-printer.htm

Answer 4

All the info you could want, and probably more can be found at howthingswork.com

http://computer.howstuffworks.com/laser-printer.htm

Answer 5

same as the powder copier works