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Compaq 1257 System DMA, Standard Floppy Disk Controller, (free), Direct memory access controller, Notice, (free), (free), (free), Preface, Home Page, System DMA

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Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1255, 1257, 1260, 1262, 1266, and 1267


		United States June 27, 104
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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal & Replacement Procedures Specifications Pin Assignments Battery Pack Operations

Specifications

System DMA


		System DMA

	Hardware DMA			System Function

	0			ES1869 Plug and Play AudioDrive

	1			ES1869 Plug and Play AudioDrive

	2			Standard Floppy Disk Controller

	3			(free)

	4			Direct memory access controller

	5			(free)

	6			(free)

	7			(free)

Return to the index list of Specifications.

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Revised: 25 February 1999

file:///C/SERVICE%20MANUALS/COMPAQ%20_%20checked...255%201257%201260%201262%201266%201267/spec2.html6/27/2004 2:37:22 AM

Contents

Page Welcome to the Maintenance & Service Guide for the Presario through 1267 series Notice Preface Product This online guide is designed to serve the needs of those whose job it is to repair Compaq products Maintenance & Service Guide This Guide will be periodically maintained and updated online as needed For content comments or questions, contact the Editor Notice First Edition (February 1999) Compaq Computer Corporation Maintenance & Service Guide Preface Maintenance and Service Guide Symbols The following words and symbols mark special messages throughout this guide Serial Number Locating Additional Information The following documentation is available to support this product: ●Compaq Presario 1200 Series Portable Computer documentation set ●Introducing Windows 95 Guide Product Description Models and Features Controls and Lights Left Side Pentium- based portable computer allows full desktop functionality Troubleshooting If the problem is intermittent, check the NOTE: computer several times to verify that the problem is solved NOTE: Illustrated Parts Catalog System Unit Cables Boards Miscellaneous Hardware & Removal and Replacement Procedures Battery Charger Board Display Panel Assembly Memory Module Specifications Systeminterrupts Memory Expansion System DMA Battery Pack Weight Model Stand-Alone(Battery Pack) Power Requirements Nominal Operating Compaq Home Search Products Service Worldwide Connector Pin Assignments Rear Connectors Click on a link: ●Parallel Connector ●Serial Connector Pin Signal Strobe Acknowledge Data Bit Keyboard/Mouse Data Ground Clock External VGA Monitor Data Data + Ground Page Battery Pack Operating Time ●Increase battery pack operating time ●Conditioning a battery pack ●Disposal of a used battery pack Increasing Battery Pack Operating Time Maximizing the Energy Stored To maximize the energy stored in the battery pack, follow these guidelines: ●Store the battery pack in a cool, dry place when not in use Return to the top of this page Conditioning a Battery Pack Disposal of a Used Battery Pack Models & Features Page Controls and Lights Controls and Lights Bottom of Unit 9. Instant Internet Access 10. Instant Search Page Left Side Components Page Right Side Components Models and Features Controls and Lights Left Side Components Right Side Components Bottom of Unit Rear Connectors Power Management for Windows 1.AC Adapter 2.Parallel Printer Port 3.Serial Port 9. Security Slot Power Management for Windows Preliminary Steps Return to Troubleshootingindex page Return to preliminary stepspage Return to Troubleshootingindex page Page Running POST RAM failure 1. Replace the memory modules 2. Replace the system board Memory test data error 2. Replace the system board 605-DisketteDrive Error Mismatch in drive type 1780-PrimaryHard Drive 0 Failure Disk 0 failed to respond Replace the hard drive Computer Checkup (TEST) Return to top of this page View System Information (INSPECT) or to Preliminary stepspage or to the Troubleshootingindex page Diagnostic Error Codes 501 through Hard Drive Test 2402 through Video Test 2458 through Keyboard Test Error Codes Failed ID Test Check the keyboard connection. If disconnected, turn off the computer Failed Selftest/Interface Test Serial Test Error Codes Serial port test failed 1. Check port configuration 2. Replace the system board and retest Hard Drive Test Error Codes Video Test Error Codes Video controller test failed Video memory test failed Video attribute test failed Video character set test failed Audio Test Error Codes Audio System Internal Error TouchPad/Pointing Device Interface Test Error Codes Mouse test failed 1. Replace the TouchPad and retest Interface test failed CD Drive Test Error Codes Return to the Troubleshootingindex page Page Solving Minor Problems Solving Audio Problems Some common audio problems and solutions are listed in the following table Solving Audio Problems This is typical; it indicates successful Battery charge is low Immediately save any open file(s) icon is blinking Then do any one of the following: Connect the computer to an Solving CD Drive Problems Solving CD Drive Problems CD drive cannot read a compact disc Compact disc is upside down or is Open the CD loading tray, lay the Solving Display Problems 1.Turn off the monitor 2.Turn off the computer 3.Disconnect the monitor signal cable from the computer 4.Turn on the monitor and allow it to warm up for one minute Defective inverter board Defective display cable Defective display panel. Defective system board Defective system board Replace the display assembly Solving Hard Drive Problems Solving Hard Drive Problems Reading hard drive takes an System entered Hibernation due to Give the system time to restore the Solving Hardware Installation Problems Solving Hardware Installation Problems Solutions(s) A new device is not recognized as part Cable(s) of new external device are or return to the Troubleshootingindex page Contacting Compaq Support Shipping Preparation 4.Close the display and all exterior doors of the computer Return to Compaq Diagnosticspage or Troubleshooting Indexpage System Unit System Unit Boards Display Assembly Battery Packs: Boards System Unit Place cursor over each device to attain its part number Boards Mass Storage Page Display Panel Assembly: Page Mass Storage Devices System Unit Boards Mass Storage Devices Miscellaneous Cable Kit Page Miscellaneous Cables Kit Place cursor over each device for a description of that item Spare Part Number: Power Cord US/French Canada Modem Cables Asia Pacific w/adapter Page Miscellaneous Hardware and Plastics Kit Page Miscellaneous Parts Miscellaneous Screw Kit (Not Shown) Page Documentation and Software Page Electrostatic Discharge Generating Static Relative Humidity Event 10% 40% 55% Walking across carpet Tool and Software Requirements Screws Return to Removal & Replacement Procedures Cables and Connectors ●Handle cables by the connector whenever possible Handle flex cables with extreme care; they can tear easily Select the desired illustration ●Removing a Cable from a ZIF Connector Return to Removal & Replacement Procedures Revised: 25 February Preparing the Computer for Disassembly Electrostatic Discharge Service Considerations Cables and Connectors Preparing the Computer for Disassembly Dip Switch Settings Memory Module Return to Removal & Replacement Procedures Removing the Battery Pack Page Removing the Palmrest Cover with Touch Pad Electrostatic Discharge Considerations Cables and Speaker 2. Close the computer and turn the computer upside Diskette Drive Removing the Heatspreader heatspeader Removing the Keyboard heatspreader 5.Disconnect the flex cable from the ZIF connector on the system board 6.Disconnect the flex cable from the ZIF connector on the system board To replace the keyboard, reverse the previous procedures Return to Removal & Replacement Procedures Removing the Processor Charger Board Panel Diskette Drive Removing the Hard Drive two screws from the hard drive mounting bracket and lift up the hard drive Removing the CD Drive the back CD drive Removing the Battery Charger Board To remove the battery charger board, complete the following steps: Prepare the computer for disassembly 2.Remove the palmrest cover with touch pad To replace the battery charger board, reverse the previous procedures Removing the Modem modem off the connector on the system board COMPAQ STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | SEARCH 1.800.AT.COMPAQ Removing the Upper CPU Cover 6.Remove the display panel assembly To replace the Upper CPU cover, reverse the previous procedures Removing the Speaker Assembly drive 7.Remove the Upper CPU cover 8.Remove the charger board To replace the speaker assembly, reverse the previous procedures Removing the Diskette Drive 7.Remove battery charger board 8.Remove the screw from the diskette drive and lift up the diskette drive Ensure the diskette drive eject lever is properly NOTE: inserted in the chassis slot, when replacing the diskette drive Removing the Fan Assembly assembly 6.Remove the hard drive Removing the System Board Memory Module 10.Remove the battery charger board 11.Remove the diskette drive 12.Remove the CD drive 13.Remove the fan Page Page Removing the Memory Module door, and slide the memory module door to the System Interrupts Opti Viper Max Dual PCI IDE Controller IRQ15 Secondary IDE controller (dual fifo) Return to the index list of Specifications System DMA Standard Floppy Disk Controller (free) Direct memory access controller System I/O Address x01F0 - x01F7 x01F0 - x01F7 - x022F x02F8 - x02FF System Memory Catalog Page Display 275 mm 6.8 mm Active Area 9.56 245 mm 7.17 183.8 mm Memory Expansion Specifications Battery Pack Diskette Drive 15 (Max) Page Hard Drives 33.3 MB/S 5.0-GB 6.4-GB 5.02 GB 6.49 GB Heads CD Drive