HP 110c-1105DX manual Grounding guidelines, Electrostatic discharge damage, Event 10% 40% 55%

Page 49

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 device when you are removing or installing internal components, observe these precautions:

Keep components in their electrostatic-safe containers until you are 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

 

 

 

 

Preliminary replacement requirements 39

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Contents Maintenance and Service Guide Page Revision history Iv Revision history Safety warning notice Vi Safety warning notice Table of contents Setup Utility Screw listing Recycling Chipset ProcessorGraphics PanelsMass storage MemoryDevices Optical driveEthernet WirelessExternal Media cardsServiceability End-user replaceable parts Operating Preinstalled SystemRequirements SecurityTop components External component identificationTouchPad Component DescriptionComponent Description Caps lock light On Caps lock is on LightFn key KeysExecutes frequently used system functions when pressed Front components External component identification Right-side components Left-side components Display components Bottom components Wireless antennas Illustrated parts catalog Service tagDescription Spare part number Device major componentsKeyboard Device major components Illustrated parts catalog Mass storage devices Power/battery pass-through boardFan USB/audio board includes cableWireless modules Wlan module Wwan module RTC batteryBattery Display bezel Description Spare part number Hinge coversDisplay Hinge Kit Display panelDisplay Screw Kit not illustrated Display enclosure includes logoItem Description Spare part number Mass storage devicesPower cords Bluetooth adapterDescription Spare part number UMA AC adapter High-definition video decoderSpare part Description Number Sequential part number listingYemen, Zaire, Zambia, and Zimbabwe Compaq 110c-1000 Illustrated parts catalog Sequential part number listing 571417-001 Compaq 110c-1100 Feet Preliminary replacement requirements Removal and replacement proceduresService considerations Plastic parts Cables and connectorsDrive handling Electrostatic discharge damage Grounding guidelinesTypical electrostatic voltage levels Event 10% 40% 55%Packaging and transporting guidelines Material Use Voltage protection level Equipment guidelinesService tag Component replacement proceduresDescription Spare part number Rubber Kit 537618-001 Device feetBattery SIM Memory module Page Keyboard For use only on models with Mobile Mi installedFor use with white HP models only For use on pink models onlyDescription Spare part number Page Page Description Spare part number RTC battery 537616-001 RTC batterySolid-state drive Mass storage devicesSolid-state drive Hard drivePage Top cover Page Page Broadcom 4312 802.11/b/g Wlan module Broadcom 4312 802.11/b/g/n Wlan modulePage Wwan module Page USB/audio board Page Power/battery pass-through board Page Description Spare part number Fan 537613-001 FanPage Fan see Fan on Heat sink assemblyPage System board Page Page For use with blue HP models only For use with pink HP models onlyFor use with HP Mini 110 by Studio Tord Boontje models only For use with Compaq models onlyDescription Spare part number Display Hinge Kit Page Page Page Page Page Page Starting the Setup Utility Setup UtilityUsing the Setup Utility Changing the language of the Setup UtilityExiting the Setup Utility Restoring default settings in the Setup UtilityDisplaying system information System Configuration menu Setup Utility menusMain menu Security menuDiagnostics menu Device specifications SpecificationsTotal power consumption Viewing angle Pixel resolutionNumber of colors Contrast ratioInch, WSVGA, AntiGlare display specifications GB to 320-GB Operating temperatureInterface type Transfer rateSolid-state drive specifications Hardware DMA System function System DMA specificationsHardware IRQ System function System interrupt specificationsAddress hex System function shipping configuration System I/O address specificationsSystem I/O address specifications Memory address System function System memory map specificationsPhillips PM1.5×1.0 screw Screw listingColor Quantity Length Thread Head diameter Silver Page Color Quantity Length Thread Head diameter Black Phillips PM2.0×3.0 screwPage Phillips PM2.0×3.0 captive screw Phillips PM2.0×4.0 screw Phillips PM2.0×5.0 screw Phillips PM2.5×5.0 screw Page Phillips PM2.5×7.0 screw Color Quantity Length Thread Head diameter Black 10.0 mm Phillips PM2.5×10.0 captive screwPhillips PM3.0×4.0 screw Backup and recovery When to back up Mobile Mi backup and recoveryBacking up your information Restoring your informationUsing HP Mi Restore Image Creator Using System RestoreRestoring using a Linux computer Select Download restore image/HP Mi Restore Image Creating a copy of the hard drive Backing up and recovering using Roxio BackOnTrackUsing the Disaster Recovery utility Performing a recoveryRestoring your hard drive image Using the Instant Restore utilityUsing system restore points Using Windows Backup and RestoreWhen to create restore points Creating a system restore pointRestoring to a previous date and time Backing up and recovering using HP Recovery ManagerBacking up your information Creating a set of recovery discs Recovering using the recovery discs Performing a recoveryPage Windows Vista backup and recovery Performing a recovery Using the Windows recovery tools Using f11 Windows XP backup and recovery Recovering the operating system and programs Recovering your informationPin Signal Connector pin assignmentsAudio-in microphone Audio-out headphone External monitor RJ-45 network Universal Serial Bus Requirements for all countries and regions Power cord set requirementsCountry/region Accredited agency Applicable note number Requirements for specific countries and regionsRecycling BatteryDisplay Page Page Page Page Page Index Jacks SIM Wwan module removal Spare part number Index
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