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Free- Exam Objective 3.11 – Dumps4shared

A plus 220-1001 – Exam Objective 3.11

A+ Exam Objective 3.11

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3.11 Given a scenario, install and maintain various print technologies.

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Welcome to Exam Notes by Dumps4shared! In this article, we
will cover Core 1 objective 3.11 Given a scenario, install and maintain various
print technologies.

> Laser
 Replace toner, apply maintenance kit, perform
calibration, clean.

> Thermal
 Replace paper, clean heating element,
remove debris.

> Impact
 Replace ribbon, replace print head,
replace paper.

> Inkjet
 Clean heads, replace cartridges, perform
calibration, clear jams.

Now it’s time to cover one of the most important and exciting
topics yet! Printers!! Before we get too deep into it, we will diffuse a
potentially volatile topic that will not be appearing on your tests.

We will break down the printers by type and then for each type,
we will describe the components and troubleshoot various printer problems,
tracing them back to the component that is responsible.

Laser Printers

HP Laserjet Printer

Laser printers basically have two main areas of concern:

  • The
    printer, i.e. everything that is not the toner cartridge.
  • The
    toner cartridge

Laser unit dell visible 

Understanding the printing process step-by-step is your best
path to success in this area. All steps are occurring so fast that they appear
to happen almost simultaneously. We will look at each step, where it fits in
the process, and how it relates to other processes.

The cartridge contains all (or most) of the components needed to
create the image and to prepare it for transfer to the page.

Cartridge: This is the main replaceable item in a
Laser printer. The cartridge contains the drum, toner hopper, agitator blade, wiper
blade, and the shutter. Ever since the replaceable cartridge was introduced to
laser printing, maintenance and support needs of these printers has been
significantly reduced.

HP Cartridge

The ink cartridge, the drum, and toner, contains everything that
could be considered a consumable or wear item.

HP Drum & Toner

This includes the transfer belt, transfer roller, pickup rollers, separator pads, and duplexing assembly.

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Laser printing is a photo-electric process. 

Charging: The imaging drum has a very high negative
voltage (-600V) applied to it by a roller or a wire depending on the age.

Exposing: In this stage, the laser
writes the image onto the drum, increasing the voltage of the exposed areas
from approximately -600V to -100V.

Laser Exposing

Developing: The toner is applied to the drum by applying a light
charge, attracting the toner to the highly charged drum.

Fusing: The fusing assembly
provides both friction and heat to the paper as it passes through, melting the
toner onto the paper.

HP Fuser Kit

Cleaning: The drum is cleaned so that a new page
can be printed. This process utilizes the erase lamps which are a part of the printer
lid and are often covered with red film. Exposing the drum to this light erases
the drum completely. The scraper blade also removes any remnants, leaving a
completely clean drum ready for a new page to print.

HP Cleaner Kit

Example of preventative maintenance on an HP LaserJet:

As part of your periodic maintenance duties, you will be
assigned one or two printers to perform preventative maintenance. You have been
asked to perform preventative maintenance on an HP LaserJet.

Maintenance Kit

First, use the model number to look up the maintenance schedule
for your unit(s). After looking it up, you see the printer needs new rollers,
vacuuming, and toner cartridge replacement. In your toolkit, you have a
Datavac/2 Pro Series Toner Vac because it meets HP’s stringent requirements,
along with many other manufacturers. New printer parts are approved when they
pass the manufacturer’s requirements and are guaranteed to fit.

Datavac-2 Pro Series Toner Vac

An additional part that is becoming more popular in new printers
is the transfer belt or roller. This is used to move documents through
multicolor laser printers and scanners. Having the right tools and
documentation are crucial aspects when working on this.

Inkjet

Now to the bread and butter of SOHO printer implementations, we
have InkJet printers. These are inexpensive and an economical addition to your
Small/Home Office that will give your mailings, business cards, and pictures
that extra pop! You can use them to print decent letters too!

Whatever your design of choice, you will find inkjet printers that
are available in every price range and feature configuration. Inkjets are
compatible with most OS’s and connection types.

Ink cartridges are modular and can be replaced one at a time,
reducing the general maintenance cost. Each cartridge uses a heated nozzle to
disperse precise amounts of ink in order to produce the desired color or
pattern. The colored ink modules are driven back and forth on each line in
order to produce continuous, seamless, and high-resolution output. Many models
use belt driven ink delivery. These machines have evolved from cheap laser
alternatives into full-fledged, multifunction devices incorporating scanners, copiers,
and fax machines that can also act as standalone wireless devices. With the
addition of a duplexer, this modest little printer can play with the big boys!

Whenever you change a printer cartridge, the machine must be
recalibrated. If calibration is not performed, your print quality will suffer.

Thermal After
having paid for something at a cash register, have you ever looked at your
receipt and wondered why it looks funny and old-school and why there are two? This
is a thermal receipt and is one of the oldest cash accounting printing
technologies still in use.

Impact Printing, or Dot Matrix, was developed concurrently with thermal.
As money became more valuable, the desire to pilfer even small amounts grew
quickly. With no tracking system, companies could literally be robbed out of
solvency by its own employees. Adding machines were created to generate a hard
copy of any tabulations and to generate a record of all transactions. The current
benefit of dot matrix is its ability to print out multiple copies of the same
document, known as carbon copies.

Dot Matrix technology uses a ribbon that is impregnated with ink and a set of pins that fire independently, transferring a dot of ink on the paper at the point of impact. This point of impact has sufficient force to activate the carbon in a multi-page document so that duplicates can be generated in real-time.[

Virtual

Every computer in the world has the opportunity to create a
virtual counterpart. For the 220-1001 3.11 sub objective, you are expected
to know specifically that you can use your Operating System (OS) tools to
perform the following actions:

Print to file: The default
output saved from Print-to-file is a .prn file. Check the Print-to-file box in
the Printer Properties applet.

Print to PDF: Check the Print-to-PDF box in the
Printer Properties applet.

Print to XPS: Checking this uses the
built-in Microsoft printer.

Print to image: Installing PDFill (a 3rd party
program) will allow the Microsoft printer to print directly to an image format
such as PNG, PPG, BMP, TIF or GIF.

3D Printers

Plastic filament

The prices for 3D printers, in addition to the materials
used to print 3D objects, are beginning to drop. Once costing tens of thousands
of dollars, 3D printers can now be purchased for a thousand dollars. Printing
materials have become more affordable, with materials such as plastic filament
now costing around twenty dollars or less. That’s cheaper than inkjet
cartridges!

Looking at the 3D printing process, you’ll need good
software to create your 3D model and to transfer the digital model to the 3D printer.
You can then print the object in pretty much the same way as you would with a
standard printer, but not exactly.

Consider during standard 2D paper printing, a horizontal 1D
stripe is deposited line by line until your image or text is complete. Now with
3D printing, each pass of the printer head creates fine layers of the chosen
material, in our case plastic filament, that stack vertically. This process is
called Fused Filament Fabrication (FFF) or Fused Deposition Modeling (FDM). Both
of these processes are additive, meaning that each print layer is added on top
of the object until the object is complete. Depending on the process, the
filament can be melted with UV light or heat.

That’s all for objective 3.11 and for main domain 3. You’re over halfway there! Good luck on the test!

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