Compaq 1256, 1275, 1266, 1272, 1267, 1274, 1273, 1262, 1260 Electrostatic Discharge, Generating Static

Page 39

Presario 1200 Series

Models: 1255, 1256, 1260, 1262, 1266, 1267, 1272, 1273, 1274, and 1275

Before You Begin

 

Specifications

 

Parts Catalog

 

 

 

 

 

 

 

 

 

 

Removal Sequence

 

Troubleshooting

 

Battery Operations

 

 

 

 

 

 

 

 

 

Index

Product Description

 

Pin Assignments

 

 

 

 

 

 

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 an electrostatic discharge (ESD) may not be affected at all and will work perfectly throughout a normal cycle. Although it may function normally for a while, it is possible for the exposed device's internal layers to degrade, reducing its life expectancy considerably.

●Networks built into multiple integrated circuits provide some protection, but in many cases, the discharge can contain enough power to alter device parameters and melt silicon junctions.

Generating Static

This table shows the different electrostatic voltage levels generated

by various activities.

NOTE: 700 volts can degrade a product.

Typical Electrostatic Voltages

 

 

 

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

 

2,000 V

 

 

700 V

400 V

plastic tubes

 

 

 

 

 

 

 

 

Removing DIPS from vinyl

 

11,500 V

 

 

4,000 V

2,000 V

trays

 

 

 

 

 

 

 

 

Removing DIPS from

 

14,500 V

 

 

5,000 V

3,500 V

Styrofoam

 

 

 

 

 

 

 

 

Removing bubble pack

 

26,000 V

 

 

20,000 V

7,000 V

from PCBs

 

 

 

 

 

 

 

 

Packing PCBs in foam-lined

 

21,000 V

 

 

11,000 V

5,000 V

box

 

 

 

 

 

 

 

 

Return to Removal & Replacement Procedures

Page 38 Page 40
Image 39
Page 38 Page 40
Contents Index Before You BeginIndex Preface SymbolsProduct Description CompaqModels & Features Controls and Lights Front Panel ComponentsLeft Side Components Right Side Components Battery Compartment CD Drive CD Drive Eject ButtonRubber feet Bottom of UnitUSB Keyboard/Mouse Port Rear ConnectorsPower Management for Windows Power Management Settings Power Management PropertiesDisplay Properties Sleep Time Out Default Hibernation ModeBattery Operating Time Rebooting After a Lockup Servicing Your Computer Full Off Mode Troubleshooting If the problem is intermittent, checkFollow the Preliminary Steps Preliminary Steps Recommended Action Power-On Self Test PostRunning Post Probable CauseRemove the Palmrest Clearing the Power-on PasswordAudio Compaq DiagnosticsPerform Computer Checkup Test View System Information InspectSelect error codes by number or type Diagnostic Error CodesBefore Replacing Parts Troubleshooting Without DiagnosticsSolving Minor Problems Solving Power Problems Solving PC Card ProblemsShipping Preparation Contacting Compaq SupportIllustrated Parts Catalog System Unit Place cursor over each device to obtain its part numberBoards BoardsDisplay Assembly Number Mass Storage DevicesPlace cursor over each device for a description of that item Miscellaneous Cables KitFrontPage Save Results Component Power CordModem Cables DescriptionMiscellaneous Hardware and Plastics Kit Miscellaneous Hardware and Plastics KitMiscellaneous Parts Documentation and Software Description Spare Part NumberQuickFind Part Number Suffix Suffix Month Suffix Month Serial Number Location Removal and Replacement ProceduresGenerating Static Electrostatic DischargeTo service the computer, you need the following Service ConsiderationsPlastic Parts Cables and ConnectorsRemoving a Cable from a ZIF Connector Select the desired illustrationZIF Connectors Models 1255, 1256, 1260, 1262, 1266, 1267, 1272, 1273, 1274, Ribbon cable position for the CD drive Ribbon cable position for the diskette drive Back to Cables and Connectors Preparing the Computer for Disassembly Preparing the Computer for DisassemblyBattery Pack Removing the Battery PackReturn to Removal Replacement ProceduresPalmrest Cover with Touch Pad Removing the Palmrest Cover with Touch PadWhen replacing the palmrest cover, ensure Return to Removal Removing the Heatspreader HeatspreaderTo remove the heatspreader, complete the following steps Removing the Keyboard KeyboardTo remove the keyboard, complete the following steps Removing the Processor ProcessorTo remove the processor, complete the following steps To replace the processor complete the following steps Index Hard Drives Removing the Hard DriveRemoval Sequence Replacement Procedures CD Drive Removing the CD DriveNext Step To replace the CD drive, reverse the previous procedures Removing the Battery Charger Board Battery Charger BoardWhen replacing the battery charger board, ensure Modem Removing the ModemDisconnect the modem cable from the modem Display Panel Assembly Removing the Display Panel AssemblyIndex Index Index When removing the display panel assembly Return to Removal Upper CPU Cover Removing the Upper CPU CoverSpeaker Assembly Removing the Speaker AssemblyTo remove the diskette drive, complete the following steps When replacing the diskette drive, ensure thatRemoving the Diskette Drive Diskette DriveReplacement Procedures Fan Assembly Removing the Fan AssemblyTo replace the fan assembly, reverse the previous procedure System Board Removing the System BoardRemove three standoffs from the system board Index Remove three screws from the system board To replace the system board, reverse the previous procedures Memory Module Removing the Memory ModuleReplacement Procedures Physical and Environmental SpecificationsSystem Interrupts System InterruptsHardware System Function System DMA System DMAHardware DMA System Function System Function Shipping Configuration System I/O AddressSystem I/O Address Address Hex System board extension for PnP System Memory CatalogSystem Memory Catalog Texas Instruments PCI-1131 CardBrightness Overall DimensionsActive Area Contrast Ratio64-MB Memory Expansion System Memory Expansion Board Memory16-MB 32-MBEnvironmental Requirements Battery PackWeight Energy Battery Pack Nickel Metal Hydride NiMH Lithium IonRead/Write Number of Drives Supported Average ms Setting Time msDiskette Drive Capacity per Diskette Diskette SizeHard Drives Spin Up time Data Buffer Capacity 24× CD DriveRotational Speed Typical Transfer RateClick on a link Connector Pin AssignmentsDisposing of a Used Battery Pack Battery Pack Operating TimeIncreasing Battery Pack Operating Time Conditioning a Battery Pack

1256, 1272, 1266, 1260, 1274 specifications

The Compaq series of printers, specifically the models 1273, 1267, 1275, 1262, and 1255, represents a noteworthy chapter in the realm of commercial printing technology from the 1990s. Each model was designed to cater to various user needs, ranging from high-quality document printing to efficient office use.

The Compaq 1273 is characterized by its robust performance aimed at small to medium businesses. This model is equipped with high-resolution printing capabilities which allows for sharp and vibrant output, making it ideal for presentations and marketing materials. The 1273 also supports multiple paper sizes, enhancing its versatility for different printing tasks.

Moving on to the Compaq 1267, this model bridges the gap between compact design and high efficiency. It features a user-friendly interface that simplifies the printing process, making it accessible for users with varying tech proficiency. Additionally, the 1267 incorporates a fast print speed, ensuring that tasks are completed quickly without sacrificing quality.

The Compaq 1275 is notable for integrating advanced printing technologies aimed at increasing productivity. This model offers both black-and-white and color printing options, catering to diverse printing needs. Furthermore, the 1275 supports network connectivity, allowing multiple users to share the printer effectively, fostering collaboration within office environments.

The Compaq 1262 places an emphasis on cost-effectiveness, appealing to budget-conscious consumers. It provides essential functionalities without unnecessary features, making it a solid choice for home offices. Despite its lower price point, it still upholds a commendable print quality, ensuring that users do not have to compromise.

Lastly, the Compaq 1255 offers basic printing capabilities that are particularly suited for everyday tasks. It is designed for users who require reliable performance without the bells and whistles of higher-end models. The 1255 is lightweight and compact, making it easy to fit into various spaces, ideal for smaller work areas.

In conclusion, the Compaq series 1273, 1267, 1275, 1262, and 1255 present a range of features catering to different audiences. Each model encapsulates the brand's commitment to quality, efficiency, and user-friendliness, making them attractive options for various printing needs in the business landscape of the 1990s.
Top Page Image Contents