HP V6801AU, V6903TU, V6905TU, V6705TU, V6703AU Grounding guidelines, Electrostatic discharge damage

Page 44

Grounding guidelines

Electrostatic discharge damage

Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine the degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many cases, ESD contains enough power to alter device parameters or melt silicon junctions.

A discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or microcircuitry. Even if the spark is neither felt nor heard, damage may have occurred.

An electronic device exposed to ESD may not be affected at all and can work perfectly throughout a normal cycle. Or the device may function normally for a while, then degrade in the internal layers, reducing its life expectancy.

CAUTION: To prevent damage to the computer when you are removing or installing internal components, observe these precautions:

Keep components in their electrostatic-safe containers until you area ready to install them.

Use nonmagnetic tools.

Before touching an electronic component, discharge static electricity by using the guidelines described in this section.

Avoid touching pins, leads, and circuitry. Handle electronic components as little as possible.

If you remove a component, place it in an electrostatic-safe container.

The following table shows how humidity affects the electrostatic voltage levels generated by different activities.

CAUTION: A product can be degraded by as little as 700 V.

Typical electrostatic voltage levels

 

 

Relative humidity

 

 

 

 

 

Event

10%

40%

55%

 

 

 

 

Walking across carpet

35,000 V

15,000 V

7,500 V

 

 

 

 

Walking across vinyl floor

12,000 V

5,000 V

3,000 V

 

 

 

 

Motions of bench worker

6,000 v

800 V

400 V

 

 

 

 

Removing DIPS from plastic tube

2,000 V

700 V

400 V

 

 

 

 

Removing DIPS from vinyl tray

11,500 V

4,000 V

2,000 V

 

 

 

 

Removing DIPS from Styrofoam

14,500 V

5,000 V

3,500 V

 

 

 

 

Removing bubble pack from PCB

26,500 V

20,000 V

7,000 V

 

 

 

 

Packing PCBs in foam-lined box

21,000 V

11,000 V

5,000 V

 

 

 

 

36 Chapter 4 Removal and replacement procedures

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Contents Compaq Presario V6500, V6600, and V6700 Notebook PCs Page Safety warning notice Iv Safety warning notice Table of contents Setup Utility Screw listing Recycling Product description Intel Core Duo processorsIntel Celeron processors AMD processorsChipset Graphics Intel Extreme Graphics MobileUMA nVidia MCP67M with shared PanelHard drives Optical drivesDiskette drive MicrophoneModem EthernetExternal media card PortsPower requirements Operating system PreinstalledServiceability End-user replaceable parts DockingExternal component identification Top componentsDisplay components Component DescriptionButtons and speakers Control Panel System and MaintenancePower Options Keys Component FunctionLights TouchPad Front components Left-side components Rear component Right-side componentsBottom components Illustrated parts catalog Serial number locationComputer major components Illustrated parts catalogKeyboards ExpressCard assemblyItem Description Spare part number Description Spare part number Processor bracket not illustratedWlan modules BatteriesOptical drives include bezel Item Description Spare part number Computer major components Display assembly components Plastics Kit Item Description Spare part number Plastics Kit 438669-001Cable Kit Item Description Spare part number Cable Kit 446520-001Mass storage devices Miscellaneous parts Sequential part number listing Spare part Description NumberIllustrated parts catalog Sequential part number listing Venezuela, Vietnam, Yemen, Zaire, Zambia, and Zimbabwe With AMD processors Cable Sequential part number listing Removal and replacement procedures Preliminary replacement requirementsService considerations Tools requiredCables and connectors Grounding guidelines Electrostatic discharge damagePackaging and transporting guidelines Equipment guidelines Material Use Voltage protection levelUnknown user password Component replacement procedures Serial numberBattery Hard drive Page Computer feet Memory modulePage RTC battery Wlan module Description Spare part number Page For use in computer models with AMD processors Optical driveFor use in computer models with Intel processors Page Switch cover Page Keyboard Description For use Spare part NumberPage Power button board Page Display assembly Switch cover see Switch cover on Keyboard see Keyboard onPage Page Page Page Page Top cover Page Page Bluetooth module ExpressCard assembly Page USB/power connector board System board Page Page Audio board Fan/heat sink assembly Page Page Processor Processor bracketPage Setup Utility Starting the Setup UtilityUsing the Setup Utility Changing the language of the Setup UtilityNavigating and selecting in the Setup Utility Displaying system informationRestoring default settings in the Setup Utility Select Exit Load Setup Defaults, and then press enterSetup Utility menus Using advanced Setup Utility featuresClosing the Setup Utility Main menuSystem Configuration menu Diagnostics menuSecurity menu Primary Hard Disk Self TestMetric SpecificationsComputer specifications Inch, WXGA, BrightView display specifications Hard drive specifications 250-GB 200-GB 160-GB 120-GB 80-GBAccess time Transfer modeApplicable disc Read WriteApplicable disc Read Write CD-ROM, CD-ROM XA, Mixed Mode Blu-raySystem DMA specifications, Intel Hardware DMA System functionSystem DMA specifications, AMD Direct memory access controllerSystem interrupt specifications, Intel Hardware IRQ System functionSystem interrupt specifications, AMD System I/O address specifications, Intel Address hex System function shipping configurationVGA System I/O address specifications, AMD Specifications System memory map specifications, Intel Size Memory address System functionSystem memory map specifications, AMD Color Quantity Length Thread Head width Black Screw listingPhillips PM2.0×5.0 captive screw Phillips PM3.0×3.0 screw Color Quantity Length Thread Head width SilverPhillips PM2.0×3.0 screw Page Phillips PM2.5×7.0 screw Page Page Phillips PM2.5×10.0 screw Color Quantity Length Thread Head width Black 10.0 mmPhillips PM2.5×4.0 screw Page Page Where used Phillips PM2.5×3.0 screw Hex HM5.0×9.0 standoff Phillips PM2.0×2.0 screw Phillips PM2.0×7.0 screw Phillips PM2.5×5.0 captive screw Phillips 2.5×4.0 captive screw Creating recovery discs Backup and recoveryRecovering system information When to back up Backing up your informationUsing system restore points Performing a recovery Recovering from the recovery discsConnector pin assignments Pin SignalAudio-out headphone Audio-in microphoneExternal monitor RJ-11 modem RJ-45 networkVideo-out Universal Serial BusPower cord set requirements Requirements for all countries or regionsRequirements for specific countries or regions Country/region Accredited agency Applicable note numberDisplay BatteryRecycling Page Page Page Page Page Symbols/Numerics IndexHard drive self test Left-side components System board
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V6501XX, V6600, V6715TU, V6803TU, V6701XX specifications

HP has long been a trusted name in the world of laptops, consistently delivering devices that cater to a variety of user needs. Among their diverse offerings, the HP V6617AU, V6904TU, V6804TU, V6513TU, and V6620US stand out for their distinctive features and specifications that appeal both to casual users and professionals.

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