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- Notebooks, PDAs, and Printers
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- How to support, upgrade, and add peripheral devices to notebooks
- About technologies relating to personal digital assistants (PDAs)
- How printers work and how to troubleshoot them
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- Use same technology as PCs, but with modifications
- Use less power
- Take up less space
- Can withstand movement and jars
- Use thin LCD panels for display
- Use small memory modules and CPUs
- Cost more than comparable PCs
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- Power sources
- AC adapter
- DC adapter
- Battery pack
- Types of batteries
- Ni-Cad (nickel-cadmium)
- NiMH (nickel-metal-hydride)
- Lithium Ion
- Future battery solution
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- Notebooks
- Generally purchased as a whole unit; not likely to upgrade hardware and
OS
- Tend to be proprietary
- Have some universal support issues, but procedures vary between brands
- PCs
- Highly modular
- Components can be interchanged, upgraded, and enhanced
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- Hard drive
- LCD panel
- Motherboard
- CPU
- Keyboard
- PC Card socket assembly
- CD-ROM drive
- Floppy drive
- Sound card
- Pointing device
- AC adapter
- Battery pack
- DC controller
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- Port on notebook itself
- Port replicator
- Docking station
- PC Card
- Also called PCMCIA (Personal Computer Memory Card International
Association) Card
- USB port
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- Once intended only for memory cards, PC Card slots are now used by many
devices
- Four standards
- Latest specification: CardBus
- Improves I/O speed
- Increases bus width to 32 bits
- Supports lower-voltage PC Cards while maintaining backward
compatibility
- Three types (Type I, Type II, and Type III), which vary in thickness
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- OS must provide two services
- Socket service
- Card service
- Might contain a data cable to an external drive, or might be
self-contained
- Other smaller slots include one for a Secure Digital (SD) Card and one
for a Compact Flash Card
- Can be hot-swapped
- Can interface with a network
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- Popular way of adding devices to notebooks
- Easy installation
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- Apply same troubleshooting guidelines as for desktop PCs
- Be aware of warranty issues
- Loaded OS and hardware configuration are specific; see documentation for
details
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- Small, handheld computers with their own OS and applications
- Battery powered
- Use either a grayscale or color active matrix or dual-scan passive
matrix display
- Can sometimes benefit from additional memory
- Include a stylus
- Might use an AC/DC adapter
- Might have fold-out keyboard option
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- What applications come with it; what can be added later?
- Easy to use? Thorough documentation?
- Is synchronization easy?
- What support is available from manufacturer?
- Type of batteries? Battery life?
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- Can it use e-mail and the Web? Extra hardware or software required?
- Can additional devices be purchased?
- What OS does it use? How easy to use?
- What is the warranty?
- What is the price?
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- Short battery life is the one largest complaint; risk losing data and
applications if battery runs all the way down
- Use cradle and adapter
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- Some come with all application software preinstalled
- Some require user to download applications at additional cost
- Some support applications that come preinstalled and cannot download
others
- Some allow downloading e-mail or Web site content
- Some can access Internet directly by way of a modem or wireless
connection
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- Synchronization
- Process by which PDA and PC “talk” to each other through universal
cradle, cable, and USB or serial connection
- Capabilities
- Backup information from PDA to PC
- Work with PDA files on PC and download applications from Web
- Some PDAs synchronize with a desktop or notebook computer through
wireless technology
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- Principal difference between the two main OSs for PDAs is in the
applications they support
- Pocket PC
- Palm OS
- Less complex
- Easier to use
- Best choice for simple tasks
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- Local printers connect directly to computer via parallel port, serial
port, USB port, infrared connection, wireless connection, IEEE 1394
port, SCSI port, or PC Card connection
- Network printers are accessed over the network
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- Laser
- Ink-jet
- Dot-matrix
- Thermal printers and solid ink printers
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- Use electrophotographic process
- Range from small, personal desktop models to large network printers
capable of handling and printing large volumes continuously
- Require interaction of mechanical, electrical, and optical technologies
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- Places toner on electrically charged rotating drum
- Deposits toner on paper as paper moves through the system at same speed
the drum is turning
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- Cleaning
- Conditioning
- Writing
- Developing
- Transferring
- Fusing
- Take place inside toner cartridge
- Use components that undergo the most wear
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- Conditions drum to contain a high electrical charge
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- Laser beam discharges a lower charge to only those places where toner is
to go
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- Data from PC is received by formatter (1) and passed to DC controller
(2) which controls laser unit (3)
- Scanning mirror (4) is turned clockwise by scanning motor
- Laser beam is reflected off scanning mirror, focused by focusing lens
(5) and sent to the mirror (6)
- Mirror deflects laser beam to a slit in the removable cartridge and on
to the drum (7)
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- Toner is placed onto the drum where the charge has been reduced
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- Strong electrical charge draws toner off drum onto paper; takes place
outside the cartridge
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- Heat and pressure fuse toner to paper
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- Small
- Print color inexpensively
- Tend to smudge on inexpensive paper
- Slower than lasers
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- Print head moves across paper, creating one line of text with each pass
- Shoots ionized ink at a sheet of paper in a matrix of small dots
- Several technologies are used to form ink droplets (eg, bubble-jet)
- Uses ink cartridges
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- New generation of ink-jet printers that give photo-quality results
- Mix different colors of ink to produce a new color that then makes a
single dot
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- Less expensive; lesser quality
- Impact printer; can print multicopy documents
- Print head moves across width of the paper, using pins to print a matrix
of dots on the page
- Uses a ribbon
- If print head fails, buy a new printer
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- Relatively new printer technologies
- Non-impact printers that use heat to produce printed output
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- Use wax-based ink that is heated by heat pins that melt ink onto paper
- Internal logic of the printer determines which pins get heated in order
to produce the printed image
- Popular in retail applications for printing bar codes and price tags
- Can burn dots onto special paper or use a ribbon that contains wax-based
ink
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- Store ink in solid blocks that are easy to handle; several can be
inserted in printer to be used as needed
- Solid ink is melted into the print head which spans the width of the
paper
- Head jets the liquid ink onto the paper as it passes by on a drum
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- Advantages
- Simple design
- Excellent print quality
- Easy to set up and maintain
- Disadvantage
- Time it takes (~15 minutes) for the print head to heat up
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- Physically attach printer to computer (via parallel, serial, USB, SCSI,
IEEE 1394 port; PC Card or Infrared connection; or wireless access
point)
- Install printer drivers
- Have Windows do it
- Use printer manufacturer’s installation program (best way)
- Alternately, use Windows Printer window to install
- Test the printer
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- Network printer contains a NIC and connects directly to the network or
is shared on the network by another PC
- Can use Network Neighborhood or My Network Places to install a network
printer on a remote PC
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- Printer maintenance
- General printer troubleshooting
- Problems with laser printers
- Problems with ink-jet printers
- Problems with dot-matrix printers
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- Procedures vary widely from manufacturer to manufacturer and printer to
printer
- Make sure consumables for the printer are on hand
- Research printer documentation or manufacturer’s Web site for specific
maintenance tips
- Clean inside and outside of the printer
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- Isolate the problem
- Application attempting to use the printer
- OS and printer drivers
- Connectivity between PC and printer
- Printer itself
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- Verify a printer self-page can print
- Problem with printer cable
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- Poor print quality due to low toner
- Printer stays in warm-up mode
- Paper Jam or Paper Out message is displayed
- Printer images are distorted
- Printing is slow
- A portion of the page does not print
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- Print quality is poor
- Printing is intermittent or absent
- Lines or dots are missing from the printed page
- Ink streaks appear on the printed page
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- Print quality is poor
- Print head moves back and forth, but nothing prints
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- Devices that provide for greater portability and how to support them
- Notebook computers Personal digital assistants (PDAs)
- Printers and how to support them
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