Printers Flashcards by Daming Huang

Image is drawn onto a photosensitive drum
– “Painted” with a laser
Picks up toner - Transfers toner to the paper
Can be separate from the toner cartridge or combined

Imaging drum

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Main Component that creates the image to be applied to the paper.

Imaging drum

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During the ___, look for extra pieces, cables, documentation, or driver disks

These can be large devices
– Make sure you have enough room
– Stay out of walkways
Check the area
– Power
– Network
– Accessibility

unboxing

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– Created by Hewlett-Packard
– Commonly used across the industry

PCL (Printer Command Language)

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– Created by Adobe Systems
– Popular with high end printers

PostScript

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– The most common connector
– USB Type B on the printer, USB Type A on the computer

USB type B

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Bluetooth
– Limited range
802.11 Infrastructure mode
– Many devices using an access point
802.11 Ad hoc mode
– No access point
– Direct link between wireless devices

Wireless device sharing

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[ ] allows to control, configure, and troubleshoot the devices remotely from a network.

Use mainly on corporates environment.

Print servers are suitable for SOHO with up to 50 servers.

Centralized Printer Server

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Embedded print servers support [ ] at a time

one printer

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A dedicated ____-handles printers across the entire network.

MMC allows to share network printers and centralizes the print server from the centralized Windows server. This will hep you to monitor the print queues, receive notifications when the print queue stop processing jobs, and troubleshoot issues that arise.

Windows or Linux based print sever

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– Print directly to the printer
– Jobs are queued on the printer
– Jobs are managed on the printer
– Web-based front-end
– Client utilit

Print server

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– Printer is connected to a computer
– The computer shares the printer
– Computer needs to be running

Printer share

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– Save paper
– Print on both sides of the page without manually
flipping over the paper
– Not all printers can do this

Duplex

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– Portrait vs. Landscape
– The paper doesn’t rotate
– The printer compensates

Orientation

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A user wants to print a spreadsheet horizontally on a piece of paper instead of vertically to fit more columns on a single page.

Orientation

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– Printers can have multiple trays
– Plain paper, letterhead, etc.
– Choose the correct tray in the print dialog

Tray settings

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set who can print, who can use the printer on the security tab at properties in printer and scanners setting

User authentication
– Everyone can print
– Set rights and permissions
– Printing vs. managing the printer

Printer security

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– Authenticate when using the printer
– Your job doesn’t print until you use your employee badge
– Quick and easy

Badging

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– Cost management
– Security monitoring
– Event Viewer / System Events
– May be built into the printer or print server

Audit logs

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Record of jobs that have been sent and printed on a particular device

Audit Logs

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– Printer must support secure printing
– Define a passcode
– Use the passcode at the printer

Device held on the printer until the user’s authentication

Will not print until you are at the printer

Secured prints

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If you are working in a large office building, and there’s one large printer for the entire floor ,you dont want to print out something sensitive, like corporate accounting data or sales figures or customer contact details and things like that to the printer all the way down the hall, and have it immediately print out. Because somebody could grab it before you got to the printer.

A lot of large office printer will support a function known as secured print. Job is going to help at the print device and its not going to print out until you get there.

You will authenticate with
- unique pin (pin)
- Badge reader
-user name and password

Secured prints

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When you open up the top of the multifunction device, you will see a large glass panel. You’ll put the document on that, you’ll close the lid and then it will scan across that glass in order to convert that document into a digital file.

This works by using a system of mirrors and lights to be able to illuminate that image and capture that image onto the lens, that can be converted into ones and zeros representing the different red, green, blue components of that image.

Flatbed scanner

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Different form factors
– All-in-one multifunction device
– Standalone flatbed
May include an ADF
– Automatic Document Feeder
– Multiple pages

Flatbed scanner

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– Scans are sent to your inbox – Large scans can fill up your mailbox

* Scan to email

If you work in the office environment and you have a network based multifunction device. It will usually send it either to email ,to a folder , or to the cloud using [SMTP] server. When you scan the document, you can enter your email, and it will then create a PDF,and then send that PDF directly to your inbox.

* Scan to email

– Using SMB (Server Message Block) – Send to a Microsoft share

* Scan to folder

Cloud storage account Google Drive, Dropbox, etc.

* Scan to cloud

is a type of electro-photographic printer,and it uses mechanical, electrical, and optical technologies.

Laser printer

How laser printers work ? 1) Toner is placed on electrically charged rotating drum called the___ 2) Toner is transferred onto paper as it moves through the system Main Component that creates the image to be applied to the paper

imaging drum

* Image is drawn onto a photosensitive drum – “Painted” with a laser * Picks up toner - Transfers toner to the paper * Can be separate from the toner cartridge or combined

imaging drum

* Heat and pressure - Melt plastic toner powder – Permanently bond toner to paper Heats up and melts the toner onto the page to adhere properly to the page

Fuser assembly

* Color laser printers – Cyan, yellow, magenta, black * Four separate toner cartridges * Image is transferred from all cartridges to the single belt – And then to a single transfer roller

Transfer belt and roller

Used as a way to transfer the image from the image drum and become fused

Transfer belt and roller

* 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

Pickup rollers

Used to pick up the paper from the feed tray and feed it through the system

Pickup rollers

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

Separation pad

Helps the pickup rollers to ensure they only pick up a single piece of paper at a time

Separation pad

* Printers usually print on a single side – Not both sides simultaneously * Printing on both sides is a two step process – Print side one, print side two * You need mechanisms to “flip” the page – Automatically * Can be built-in to the printer * Or available as an add-on

Duplexing assembly

Moves the paper from the front to back

Duplexing assembly

A plastic housing that contains toner powder

toner cartridge

Bitmap of the final page is stored in memory. * Build the entire page in memory

Step 1. **Processing the image:**

Drum surface is charged to -600 V. Prepare the drum with a negative electrostatic charge

Step 2. **Charging or conditioning:**

Laser beam writes -100 V image to drum surface. Write the image with the laser

Step 3. **Exposing or writing:**

Toner is applied to the surface of the drum. Add toner to the charged areas of the imaging drum

Step 4. **Developing:**

The transfer roller puts a positive charge on the paper to pull the toner from the drum and onto the paper. Move the toner from the drum to the paper

Step 5 . **Transferring:**

Fuser assembly uses heat and pressure to fuse toner to paper. Heat and pressure

Step 6. **Fusing:**

Drum is cleaned of residual toner and charge. Remove excess toner

Step 7. **Cleaning:**

* Look for the messages – Low doesn’t mean empty * The toner can also contain the OPC drum – Organic Photoconductor drum – Sensitive to light; keep it in the bag * Power down the printer – Safety first * Remove packing strips from the new drum – Replace it with the old

Replacing the toner cartridge

* Laser printers wear out – All those moving parts – Heat and pressure * Standard maintenance kits – Replacement feed rollers, new fuser unit, etc. * When to perform maintenance? – Check the printer’s page counter * Power down and replace the components – Fuser units are HOT * Reset the page counter when you’re done!

Laser printer maintenance kit

* Look for the messages – Low doesn’t mean empty * The toner can also contain the OPC drum – Organic Photoconductor drum – Sensitive to light; keep it in the bag * Power down the printer - Safety first * Remove packing strips from the new drum – Replace it with the old

Replacing the toner cartridge

– All those moving parts – Heat and pressure * Standard maintenance kits – Replacement feed rollers, new fuser unit, etc. * When to perform maintenance? – Check the printer’s page counter * Power down and replace the components – Fuser units are HOT * Reset the page counter when you’re done!

* Laser printers wear out

* Different toner cartridges print with different densities – Some dark, some light * Laser printer calibration can adjust the density – Makes it looks perfect * Can be automated or a manual process – Every printer is different – Check the printer manual

Laser printer calibration

* Laser printers are dirty - All that toner and paper dust * Check the manufacturer’s recommendations – Water, isopropyl alcohol (IPA) – Don’t use harsh chemicals! * Outside - Damp cloth * Inside - Wipe dust away – Don’t use a normal vacuum cleaner or compressed air – Wash off skin with cold water – Clean rollers with IPA

Laser printer cleaning

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

Inkjet (ink-dispersion) printer

* Place drops of ink onto a page – Pulled from a set of cartridges * CMYK - Cyan, Magenta, Yellow, Key (black)

Ink cartridge

* Some consumer printers integrate the print head into the ink cartridge – Change the cartridge, get a new print head * Others separate the ink cartridge from the print head

Print head

* Pick up and feed paper through the printer – Must be clean and not worn * Duplexing – Print on both sides of the paper – Included with some printers

Feed rollers

* Ink cartridges are moved over the paper – Carriage may include its own print head * Belt moves the carriage back and forth – Another moving part

Carriage and belt

* Align nozzles to the paper – Lines should be crisp – Colors should align * Printer includes a calibration option – May need to make minor adjustments

Inkjet printer calibration

* Small droplets of ink - And small holes in a print head * Clogged heads is a big issue – Many printers automatically clean every day – Output has streaks or sections of missing color * Cleaning process can be started manually – Only takes a few minutes * Some print heads/cartridges can be removed – Manually cleaning may help

Cleaning print heads

* Usually separate colors – Cyan, Magenta, Yellow, and Key (CMYK) – Some cartridges will combine these * Takes seconds to replace – Takes a few minutes to calibrate and prepare the cartridge * Recycle the empty cartridge - All plastic

Replacing inkjet cartridges

* Lots of turns and twists – A jam is inevitable * Remove tray paper – Any loose paper * Remove paper from the path – Firm pressure, don’t rip * Check for any scraps of paper * Remove all loose paper

Clearing jams

* Align nozzles to the paper – Lines should be crisp – Colors should not overlap * Printer includes a calibration option – May need to make minor adjustments

Inkjet printer calibration

* White paper – Turns black when heated – No ink! * VERY quiet – Almost silent * Paper is sensitive to light and heat – And clear tape

Thermal printer

* Paper covered with a chemical – Changes color when heated * Cash registers, credit card terminals – And quiet areas * Looks like normal paper – Feels a bit different

Thermal paper

* Full-length heating element – No moving print head

Heating element

* Pull paper through the printer – Relatively small paper path

Feed assembly

* Relatively inexpensive – But impossible to substitute * Different sizes – Not like laser printer paper - Keep a list * Actual replacement process is easy – Simple paper feed – Small device

Thermal paper replacement

* Single ribbon - Self-contained - One long circle * Replace when ink becomes too light – Ink is eventually consumed * Designed to be modular - Replace in less than a minute

Printer ribbon replacement

* Relatively small amount – Paper bits and dust – No toner! * Blow out the printer – Take it outside * Wipe it out – Damp cloth * Avoid using a vacuum – Unless it’s designed for computers – Resists static buildup/discharge

Removing debris

* Liquid cleaner – Isopropyl alcohol (IPA) – Get a cleaning pen – Check manufacturer’s recommendations * Swab gently - Usually small areas * Use a cleaning card – Cleans the head and paper pathways

Cleaning the heating element

* Paper pulled through with holes on the side of the paper – Instead of using friction * Continuous paper feed – Perforations between pages * Holes have to line up perfectly – Tractor paper can be perforated to remove holes

Tractor feed

* Fabric – One long ribbon - Never ending circle * Easy to replace - Once single unit * Proprietary size - Specific to printer model

Printer ribbon

* Moves back and forth – Pins hit ribbon and paper * One matrix - Must move across the page to print

Dot-matrix printer head

* Print head with a small matrix of pins – Presses against a ribbon to make a mark on paper * Good for carbon/multiple copies * Low cost per page * NOISY * Poor graphics * Relatively niche use cases

Dot-matrix (impact) printers

* Not as easy as a laser printer – Paper must feed perfectly into holes – Tractor feed * Forms must be positioned correctly – Text needs to fit a predefined space * Paper must feed without constraint * Make sure nothing is in the way

Replacing paper

* Single ribbon – Self-contained - One long circle * Replace when ink becomes too light – Ink is eventually consumed * Designed to be modular - Replace in less than a minute

Printer ribbon replacement

* Takes a lot of abuse – Directly hits the ribbon and paper * Gets hot - Watch your fingers – Another modular part – Look for a release lever or bar * Replace with the ribbon for the best effect – The output should look perfect

Print head replacement

* “Print” in three dimensions – Create a 3D item based on an electronic model * Additive manufacturing – Build in layers to create the object – No machining process required * Rapid prototyping – Design and create relatively quickly and inexpensively * Deploy designs anywhere in the world – Or into space

3D printers

In 3D printer , ___- * A flat adhesive surface – The foundation of a 3D print – Everything builds on that first layer * Needs to be level and clean – Prints “stick” to the bed * Filament printing – The print bed is the printing surface – Many different print bed options * Resin printing – The “bed” is the location where the resin is hardened by the UV light

The print bed

In 3D printer , ___- * Stereolithography (SLA) 3D Printing – Smooth and finely detailed 3D prints * Resin is hardened using a light source – Ultraviolet light or a laser – Layers are added to the bottom – Entire print hangs from the build platform * Resin must be handled properly – Wear protective gear – Take unused resin to your local hazardous materials disposal

Resin printing

In 3D printer , ___- * Fused Deposition Modeling (FDM) – Melt filament to print 3D objects – This is probably the printing type you’ve seen * Print a layer, move up,print another layer – Watch the printer create the object * Good all-around printer – Larger print bed than resin printers – Easy to manage filament – Minimum of mess – Fewer disposal issues

Filament printing

Printers Flashcards

(83 cards)