HP m300 manual Removal and Replacement Preliminaries, Electrostatic Discharge

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chapter 4

REMOVAL AND REPLACEMENT

PRELIMINARIES

This chapter provides general service information for the Compaq Expansion base. Adherence to the procedures and precautions described in this chapter is essential for proper service.

4.1 Electrostatic Discharge

A sudden discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not be affected at all and will work perfectly throughout a normal cycle. Or it may function normally for a while, then degrade in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

Removal and Replacement Preliminaries

4-1

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Contents Compaq ArmadaStation EM Maintenance and Service Guide Contents Appendix Using this Guide SymbolsTechnician Notes Serial Number Locating Additional InformationArmadaStation EM Features Product DescriptionSecurity Features External ConnectorsArmadaStation EM Components ArmadaStation EM Front ComponentsDescription Function Volume control switch ArmadaStation EM Right Side ComponentsArmadaStation EM Rear Panel Components ArmadaStation EM Rear Panel ComponentsActivity Lights MultiBaysMultiBay/Device Compatibility DeviceHalf-Height Bay Security LockPCI Expansion Boards Troubleshooting Before Replacing PartsProblems and Solutions Solving Docking and Undocking ProblemsSolving Expansion Board Problems Problem Probable Cause Recommended ActionsSolving External Keyboard Problems Solving External Mouse ProblemsSolving Expansion Device Installation Problems Solving External Monitor Problems Press any key or click the mouseIllustrated Parts Catalog Serial Number LocationCompaq ArmadaStation EM Components Compaq ArmadaStation EM ComponentsSpare Parts Compaq ArmadaStation EM Components DescriptionPlastics Kit Components Plastics Kit Components Spare Part NumberItem Description MultiBay Option Cable Kit MultiBay Option Cable Kit Components Spare Part NumberMiscellaneous Spare Parts Miscellaneous not illustratedSpare Part Number Removal and Replacement Preliminaries Electrostatic DischargeGenerating Static Preventing Electrostatic Damage to EquipmentTypical Electrostatic Voltages Relative Humidity Event 10% 40% 55%Preventing Damage to Drives Grounding MethodsStatic Shielding Protection Levels MethodGrounding Workstations Grounding EquipmentRecommended Materials and Equipment Service Considerations Tool and Software RequirementsScrews Cables and Connectors Plastic PartsRemoval and Replacement Procedures Disassembly Sequence Chart Expansion Base Disassembly SequencePreparing the Expansion Base for Disassembly Disconnecting the Expansion BaseExternal Components Expansion Base FeetTray Removing the TrayConnector Cover Removing the Connector CoverRear Bezel Removing the Rear BezelSliding the Manual Release Lever PCI Expansion Boards Locating the Expansion Slots10.Removing the Expansion Slot Cover 11.Installing an Expansion Board Top Cover 12.Removing the Top Cover ScrewsSwing the top cover up and forward to remove it Figure Installing a Half-Height Drive Half-Height Bay15.Removing the Half-Height Bay Blank Bezel Cover 16.Removing the Half-Height Drive Screws 17.Attaching the Bezel Cage to the Half-Height Drive 18.Connecting the Power Cable 19.Connecting the Diskette Drive Cable 20.Connecting the Hard Drive Cable 21.Connecting the CD-ROM Drive/Audio Cable 22.Installing a Half-Height Drive Left Speaker 23.Removing the Left Speaker24.Disconnecting the Half-Height Bay and Left Speaker Cables MultiBay25.Removing the MultiBay and Control Panel Control Panel 26.Removing the Control PanelMechanism Assembly 28.Removing the Mechanism Assembly Power Supply 30.Removing the Power Supply Backplane 31.Removing the BackplaneExpansion Base Physical and Environmental Specifications PecificationsMetric 2Specifications Connector PIN Assignments Table A-1 Headphone JackTable A-2 Microphone Jack Table A-5 Serial Connector Table A-3Table A-4 Table A-6 Table A-7 Stereo Line-out JackTable A-8 Stereo Line-in Jack Table A-13 Docking Connector Signal PinPDATA6 LD14 Pin Signal Power Cord SET Requirements Conductor Power Cord SetGeneral Requirements Conductor Power Cord Set Requirements-By Country Country-Specific RequirementsCountry Accredited Agency Applicable Note Numbers Index PCI Index

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