Compaq 1255, 1256, 1260, 1262, 1266, 1267, 1272, 1273, 1274, 1275 System DMA

United States January 3, 2003

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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

Product Description Pin Assignments Index

Specifications

System DMA

System DMA

Hardware DMA System Function

0ES1869 Plug and Play AudioDrive

1ES1869 Plug and Play AudioDrive

2Standard Floppy Disk Controller

3(free)

4Direct memory access controller

5(free)

6(free)

7(free)

Return to the index list of Specifications.

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Contents

Main Before You Begin Notice Preface Symbols Technician Notes Serial Number Locating Additional Information Compaq Models & Features Compaq Presario 1200 Series Portable Computer Models Controls and Lights Front Panel Components NOTE: or a shopping cart. Left Side Components Right Side Components Bottom of Unit Rear Connectors Page Power Management Settings Display Properties Sleep Hibernation Mode Models: 1255, 1256, 1260, 1262, 1266, 1267, 1272, 1273, 1274, and 1275 Battery Operating Time Battery operating time is affected by variables, such as the following: Rebooting After a Lockup Servicing Your Computer - Full Off Mode Troubleshooting Preliminary Steps Power-On Self Test (POST) Running POST Power-On Self-Test Messages 102-System Board Failure 162-System Options Not Set XX000YZZ 201-Memory Error 301-Keyboard Error Clearing the Power-on Password Compaq Diagnostics Perform Computer Checkup (TEST) View System Information (INSPECT) compaq.gif (932 bytes) top_nav.gif (991 bytes) Diagnostic Error Codes Return to the top or return to the Troubleshooting index page. Troubleshooting Without Diagnostics Solving Minor Problems Solving Audio Problems Solving Battery Pack and Battery Gauge Problems Solving CD Drive Problems Solving Diskette and Diskette Drive Problems Solving PC Card Problems Solving Power Problems Contacting Compaq Support Shipping Preparation Illustrated Parts Catalog System Unit Place cursor over each device to obtain its part number. Boards Place cursor over each device to obtain its part number. Display Assembly Mass Storage Devices Place cursor over each device to obtain its part number. Miscellaneous Cables Kit Place cursor over each device for a description of that item. Cables Power Cord Modem Cables compaq.gif (932 bytes) top_nav.gif (991 bytes) Miscellaneous Hardware and Plastics Kit Miscellaneous Hardware and Plastics Kit Miscellaneous Parts Documentation and Software Removal and Replacement Procedures Serial Number Location Generating Static Typical Electrostatic Voltages Service Considerations Tool and Software Requirements Screws Cables and Connectors Select the desired illustration. Plastic Parts ZIF Connectors Page Page Page Page Preparing the Computer for Disassembly Before beginning removal and replacement procedures, complete the following procedures: Removing the Battery Pack Page Removing the Palmrest Cover with Touch Pad Page Removing the Heatspreader Removing the Keyboard Removing the Processor To replace the processor complete the following steps: Page Removing the Hard Drive Page Page Removing the CD Drive Page Page Removing the Battery Charger Board Removing the Modem Page Removing the Display Panel Assembly Page Page Page Page Removing the Upper CPU Cover Removing the Speaker Assembly Removing the Diskette Drive Page Removing the Fan Assembly Page Removing the System Board Page Page Page Page Removing the Memory Module Page Physical and Environmental System Interrupts System DMA System I/O Address System Memory Catalog Display Memory Expansion Battery Pack Diskette Drive Hard Drives CD Drive Connector Pin Assignments Battery Pack Operating Time Increasing Battery Pack Operating Time Minimizing the Energy Required Maximizing the Energy Stored Conditioning a Battery Pack

Compaq System DMA

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