Printers and MFD's Flashcards
Do laser printers use toner cartridges?
Yes.
What is a spooler in printing and what is it for?
Computer software that manages the print queue and tells the printer what to do.
Which type of printer provides the best quality?
Lazer printer. They are fast and reliable also.
How do laser printers work?
The image is lasered onto a photosensitive drum, the charged image on the drum then picks up/attracts toner where it has been lasered. The toner is then heated/melted by a FUZER and then permanently bonded to the paper through pressure (hot melted plastic toner powder being melted onto the paper via the transfer roller).
Which is the fastest type of printer?
Laser printers are the fastest by using laser beams to provide output onto paper. They have a lot of moving parts which means there are a lot of potential faults.
What are two positives and two negatives of laser printers?
Pros:
-Very High Quality
-Fast Printing Speeds
Cons:
-A lot of moving parts, a high propensity for a multitude of faults means they can be difficult to troubleshoot.
-Higher cost than other printer types as they require onboard memory.
-Can get very messy on the inside, hard to clean out
What are the 4 common colours (toner cartridges) used by an Inkjet/Colour printer?
Black, Yellow, Magenta, Cyan
How do Inkjet/Colour printers work?
The image is transferred from all 4 cartridges (colours) to a single belt and onto a transfer roller which rolls the ink/image onto the page.
What is the purpose of pickup rollers in printers?
In combination with Separation Pads they are responsible for “taking” one sheet of paper at a time from the paper tray into the printer mechanism. If they are faulty no paper or multiple pages of paper at once may be taken through.
What is a duplexing assembly in a printer?
Mechanism responsible for flipping paper over so you can print duplex pages (on both sides of a sheet).
Define duplexing.
Printing to both sides of a sheet.
What are the 7 steps involved in the laser printing process?
- Processing - build the printing page in the laser printer onboard memory unit.
- Drum charging - the corona wire or charge roller negatively charges the photosensitive drum a negative electrostatic charge. (clears the drum/prepares it to receive an image from the laser)
- Exposing (painting) - draw the image onto the drum with a laser (positive charge) that neutralises the negative charge on the drum where the laser hits it and gives that exposed area a positive charge.
- Developing - add negatively charged toner to the neutralised areas on the imaging drum from the developer roller. Sticks negatively charged toner to the drum where the image has been lasered to have a positive charge.
- Transferring - move (jump) the toner from the drum onto the paper via the transfer roller as the paper is moved by. Static charge eliminator removes any excess charge.
- Fusing - the FUSER heats the toner on the paper which melts it and presses it onto the paper via heat and pressure.
- Cleaning - excess toner is removed from the imaging/photosensitive drum so that the printer is ready to start the process again. It can take multiple steps 2-7 to completely print a whole page. (cleaning blade)
What are some pros and cons of Inkjet printers?
Pros:
Low cost.
Good quality.
Easy to use.
Reasonably fast.
No warm up time.
Cons:
Quality not as good as laser printers.
Not as fast as laser printers.
Not good for high volume printing.
Expensive ink cartridges.
Sensitive to water even a drop can cause blurred images.
Print heads clone to clogging and damage.
Ink fades.
SNMP Ports?
Simple Network Management Protocol (network device statistic monitoring) uses ports udp/161 to Query the devices (ask for their stats.) and udp/162 for traps/alerts (for if a stat goes outside a set range the network manager gets an alert).
What is a MFD?
Multi-Function Device (MFD) such as a all in one scanner, printer and copier.
