working with printers chapter 15 release 22/10/2010powered by dj
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Working With Printers
Chapter 15
Release 22/10/2010 powered by dj
Slide 2 of 44Chapter 15
Objectives Differentiate between impact printers and non-impact
printers Identify the different parts of a printer Explain the working of dot matrix printers Explain the working of inkjet printers Explain the working of laser printers and all-in-one
printer Assemble a printer Connect a printer to a computer Troubleshoot printers
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Slide 3 of 44Chapter 15
Printers Prints text documents and images on paper Different types of printer are:
Printers
Impact Printers Non-Impact Printers
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Slide 4 of 44Chapter 15
Dot Matrix Printer (DMP) - I
Prints documents as well as graphics Uses a matrix of metal pins on print head to create
dotsPhysical contact is established between print head,
ribbon cartridge and paperDot matrix printer is a type of Impact PrinterUses electromagnet print head and tends to be
noisy Can not produce high quality document or graphics
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Slide 5 of 44Chapter 15
Dot Matrix Printer (DMP) - II
Best useful in creation of multi-part document like invoices
No. of metal pins in printer head varies form 9 to 24
Speed varies from 30 to 550 cpsGenerally connected to LPT port Can achieve high resolutions by moving print
head slowly
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Slide 6 of 44Chapter 15
Dot Matrix Printer
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Slide 7 of 44Chapter 15
DMP Mechanism
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Slide 8 of 44Chapter 15
DMP Subassemblies
Power Supply – supplies DC voltage to all other assemblies Logic Board – carriage motor control, PF motor control,
print head control and control panel Carriage Mechanism – carriage motor, timing belt, driving
pulley Paper Feed Mechanism – friction feed and sprocket feed Sensors – home position, paper, tractor or manual feed and
head gap lever DIP Switches – setting paper length, print direction and print
quality modes
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Slide 9 of 44Chapter 15
Components of DMP - I
Head Mechanism• Head• Head Cable
Carriage Mechanism• Carriage unit• Carriage belt• Carriage motor• Belt driver pulley• Ribbon gear assembly• Carriage rod
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Components of DMP - II
Paper feed mechanism• Paper feed motor• Paper feed gears• Platten rod Tractor mechanism Sensors – home position, paper, head gap,
tractor/friction Levers – head gap, friction/tractor
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Slide 11 of 44Chapter 15
Question for GD Time Limit – 2 Mins
What is the difference between impact and non impact printer?
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Slide 12 of 44Chapter 15
Thermal Printer
Uses heated pins to burn images onto heat sensitive paper.
Mainly used in calculators and fax machines; since they are inexpensive but they print slowly and produce relatively low resolution print jobs.
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Slide 13 of 44Chapter 15
Types of Thermal Printer
Thermal Wax Transfer - Printer uses a wax-based ink to paper. A thermal print head melts wax ink from the transfer ribbon to the paper. When the wax is cooled it leaves the impression permanently on the paper.
Direct Thermal - A printer that uses to print image by burning dots to coated paper when the paper passes through the lines of heating elements.
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Slide 14 of 44Chapter 15
Non-impact Printers
Known for quite operation as physical contact is not established between head, cartridge and paper
Different types of non-impact printers are:
Non-Impact Printers
Inkjet Printers Laser Printers
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Slide 15 of 44Chapter 15
Inkjet Printers
Places extremely minute amount of electrically charged ink on paper to create images or text
Drops of ink are sprayed through a series of nozzles
Uses the piezoelectric crystal to introduce continuous ink jet method.
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Slide 16 of 44Chapter 15
Question for GD Time Limit – 2 Mins
How does an inkjet printer work?
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Slide 17 of 44Chapter 15
Structure of Printer - I Contains parts that accept, support and move
paper during the process of printing
PrinterParts
Feeder SupportEdge
GuidesCover
Output Try
Output Try
Extension
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Slide 18 of 44Chapter 15
Structure of Printer - II
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Feeder
Support
Edge Guides
Cover
Output Tray Output Tray Extension
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Internal Parts of DeskJet Printer
Sensors – paper sensor, head home position sensor and cover sensor
Logic Board Cartridge Print Head Adjustable lever Control Panel – power, resume Service Station – caping, wiping and spitting
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Slide 20 of 44Chapter 15
Practical Activity Time Limit – 8 Mins
Explain the internal parts of a deskjet printer.
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Slide 21 of 44Chapter 15
Laser Printers
Uses a beam of laser for printing
Uses static electricity to combine ink powder and paper
Consists of a revolving drum/cylinder that is made up of photoconductive material
Drum is charged with the help of a charging wire called the charge corona wire
Laser Printer
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Slide 22 of 44Chapter 15
Working of Laser Printer - I
First, drum is positively charged and laser beam from laser scanning unit creates a laser etched area on the drum with negatively charged.
Thereafter, a fine ink powder called toner is sprinkled on the paper which has to be positively charged.
As the drum rolls, the toner adheres to the laser-etched area of the drum
After this, the drum rolls over a paper.
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Slide 23 of 44Chapter 15
Working of Laser Printer - II
The paper is given a negative charge. This negative charge must be stronger than the charge of the laser-etched electric image.
This will help the toner to leave the negative area on the drum for the negatively charged paper.
The paper is discharged as it moves out. The paper is passed through a fuser. As the
paper passes through the fuser, the toner melts due to the heat.
The toner is thus fixed on the paper.
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Slide 24 of 44Chapter 15
Question for GD Time Limit – 4 Mins
Explain the working of a LaserJet printer.
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Slide 25 of 44Chapter 15
Components of Laserjet - I
DC ControllerPower supply unitVideo control board Laser Scanning UnitPaper pickup assembly
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Slide 26 of 44Chapter 15
Components of Laserjet - II
Separation padFuser UnitSensors – paper in/out and top cover sensorTonerInput and output trayTransfer Roller
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Slide 27 of 44Chapter 15
All-in-one Printer
Now-a-days most people are going for all-in-one printer as it performs multiple functions like printing, faxing, scanning and copying.
Use USB port or wireless network to connect to the computer
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Slide 28 of 44Chapter 15
Consumables
Consumables are the products which are used or consumed by individuals and companies
It must be replaced after a particular period of time.
Examples for some consumables are printer-related goods, which consists of ribbon, cartridges, toner, and paper.
Consumer should buy consumable products regularly.
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Slide 29 of 44Chapter 15
Attributes of Printer
Speed – Defines speed at which a printer prints the documents. Measured in characters per second (cps) or pages per minute (ppm).
Dots Per Inch (DPI) – Specifies the number of pixel or dots of ink that the printer uses while printing a image or document.
Life of head and cartridge – Life of DMP printhead is 200 million dots/pin and life of ribbon cartridge is 3 million characters in draft mode of WeP LQ1050+DX DMP.
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Slide 30 of 44Chapter 15
Question for GD Time Limit – 2 Mins
What are the attributes of a printer?
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Slide 31 of 44Chapter 15
Practical
Perform the activity mentioned in Lab no. 1 in the text book:
• To assemble a Dot matrix printer.• Click on the image to run the video.
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Slide 32 of 44Chapter 15
Practical
Perform the activity mentioned in Lab no. 2 in the text book:
• To assemble the Inkjet/Deskjet printer.
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Slide 33 of 44Chapter 15
Practical
Perform the activity mentioned in Lab no. 3 in the text book:
• To assemble the LaserJet printer.• Click on the image to run the video.
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Slide 34 of 44Chapter 15
Installing a Printer – Other Activities
Setting up a Printer – Paper Loading – Loading ribbon in DMP-Printer Self-test -
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Slide 35 of 44Chapter 15
Practical
Perform the activity mentioned in Lab no. 4 in the text book:
• To setup a DMP printer.
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Slide 36 of 44Chapter 15
Practical
Perform the activity mentioned in Lab no. 5 in the text book:
• To setup a DeskJet/Inkjet/All in One printer.
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Slide 37 of 44Chapter 15
Practical
Perform the activity mentioned in Lab no. 6 in the text book:
• To setup a LaserJet printer.
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Slide 38 of 44Chapter 15
Practical
Perform the activity mentioned in Lab no. 7 in the text book:
• To load paper in a LaserJet Printer and to load ribbon in DMP.
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Slide 39 of 44Chapter 15
Troubleshooting
You may encounter different problems when working with the printer such as:• General Troubleshooting • Troubleshooting Dot Matrix Printers • Troubleshooting Inkjet Printers • Troubleshooting Laser Printers
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Slide 40 of 44Chapter 15
Summary - I A printer is a peripheral output device that prints images and
text on paper Printers are classified into two main groups such as impact
printers and non-impact printers The main characteristics of a printer that a buyer generally
looks for are:• Speed• Dots Per Inch• Life of cartridge and print head
Dot matrix printers produce low-quality text and graphics at affordable prices
Consumables are defined as goods that are used or consumed by individuals and companies
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Slide 41 of 44Chapter 15
Summary - II Thermal printer uses heated pins to burn images onto heat
sensitive paper Impact printers work by banging a print head against an ink-
soaked ribbon that is placed over paper that is being printed Carbon-copy printing is an application that requires dot matrix
printers Non-impact printers are noiseless as compared to impact
printers Inkjet printers and laser printers are the most widely used non-
impact printers An inkjet printer functions by placing minute drops of ink on
the paper that is being printed
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Slide 42 of 44Chapter 15
Summary - III Laser printers function on the basis of static electricity A fine ink powder called toner is used for printing in laser
printers We can solve different problems of a printer by performing
troubleshooting. A printer displays flashing lights to indicate some internal
problem. A printer performs a self-test to segregate the problem
between printer and system. The printer DIP switches can set the configuration of a dot
matrix printer
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Slide 43 of 44Chapter 15
Explorative Work
Refer to Internet, reference books or magazine to get the information.
Do not copy the information provided in this text book. Consult your faculty for further guidance.
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Printer
Sl. Make Type Interface PPM Memory Size dpi Approx. Cost
1
2
3
4
5
Slide 44 of 44Chapter 15
Mind Map
Draw a mind map to summarize this chapter
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