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MAINTENANCE
& SERVICE GUIDE
Compaq Deskpro 2000
Series of Personal Computers
Pentium Processor with MMX Technology
and Pentium II Processor
September 1997 Edition
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278041-001 278785-002
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Notice The information in this guide is subject to change without notice. COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN; NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL. This guide contains information protected by copyright. No part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation. © 1997 Compaq
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CPS
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CONTENTS preface About this Guide Symbols and Conventions............................................................................................ ix Technician Notes........................................................................................................... x System Serial Number................................................................................................... x Locating Additional Information ...................................................................
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1.4.1 Front Panel Controls and LEDs .......................................................... 1-14 1.4.2 Drive Positions....................................................................................1-15 1.4.3 Rear Panel Connectors ........................................................................ 1-16 1.5 Minitower Computer Features.......................................................................... 1-17 1.5.1 Front Panel Lights and Controls....................................
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chapter 3 Illustrated Parts Catalog 3.1 System Unit........................................................................................................3-2 3.2 Mass Storage Devices ........................................................................................ 3-6 3.3 Cables.................................................................................................................3-8 3.4 Standard and Optional Boards................................................................
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5.8.2 Outboard Expansion Board ................................................................. 5-11 5.9 System Board Components ............................................................................. 5-12 5.9.1 Memory Modules................................................................................5-12 5.9.2 System Board Graphics Memory Module Upgrade............................ 5-13 5.9.3 Microprocessor..............................................................................
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6.16 Front Bezel Assembly..................................................................................... 6-25 6.16.1 Front Bezel..........................................................................................6-25 6.16.2 Power Button.......................................................................................6-26 6.16.3 Bezel Blank.........................................................................................6-27 6.16.4 Compaq Logo..............................
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appendix A Connector Pin Assignments......................................................................................................... A-1 appendix B Power Cord Set Requirements General Requirements............................................................................................... B-1 Country-Specific Requirements................................................................................ B-2 appendix C Hard Drives Device 0/Device 1 Relationship............................
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preface ABOUT THIS GUIDE This Maintenance and Service Guide is a troubleshooting and repair guide that can be used for reference when servicing the Compaq Deskpro 2000 Series of Personal Computers. Only authorized technicians trained by Compaq should attempt to repair this equipment. Compaq Computer Corporation reserves the right to make changes to the Compaq Deskpro 2000 Series of Personal Computers without notice. Symbols and Conventions The following text and symbols mark special messages thr
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Technician Notes WARNING: Only authorized technicians trained by Compaq should attempt to repair this equipment. All ! troubleshooting and repair procedures are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies, no one should attempt to make repairs at the component level or to make modifications to any printed wiring board, Improper repairs can create a safety hazard. Any indications of component replacement or printed w
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chapter 1 PRODUCT DESCRIPTION This chapter describes the model offerings and features of the Compaq Deskpro 2000 Series of Personal Computers. Figure 1-1. Compaq Deskpro 2000 Series Personal Computer Compaq Deskpro 2000 Series of Personal Computers 1-1
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1.1 Compaq Deskpro 2000 Series of Personal Computer Models The Compaq Deskpro 2000 Series of Personal Computers is available in both desktop and minitower configurations. This series of personal computers uses the Intel family of Pentium processors consisting of the Intel Pentium processor and the Intel Pentium II processor. Both processors utilize MMX technology. These configurations are described in the following sections. 1.1.1 Desktop Models Table 1-1 Desktop Models Configuration Maximum Int
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1.2 Features The Compaq Deskpro 2000 Series of Personal Computers have the following standard features: 1.2.1 Pentium System Feature Summary ■ Intel Pentium Processor with MMX technology running at speeds of 166, 200, and 233 megahertz ■ 256-KB (L2) cache secondary standard, expandable to 512-KB ■ 16- or 32-megabyte synchronous dynamic random access memory (SDRAM) standard depending on the model, expandable to 384 megabytes of SDRAM installed in dual inline memory modules (DIMMs) ■ One Enhanced
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1.2.3 Features Common to Both ■ One 1.44-megabyte, 3.5-inch high-density diskette drive installed ■ Peripheral Components Interconnect (PCI) chipset used for PCI/ISA, two USB ports, memory, and peripheral control ■ Super I/O controller which integrates a serial port, parallel port, diskette drive interface, real- time clock, CMOS RAM, and mouse and keyboard controller ■ PCI and ISA peripheral connectors on the expansion riser board ■ BIOS in a flash memory device which supports PCI auto-configur
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■ Mouse ■ Keyboard and mouse connectors on the back panel ■ Internal piezo speaker mounted on system board ■ Intelligent Manageability and security features, including password and cable lock provision ■ Compaq Diagnostics and Configuration utilities, support software, and device drivers 1.3 System Design This section presents a design overview and functional descriptions of the key components of the Compaq Deskpro 2000 Series of Personal Computers. All replaceable components are identified in C
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1.3.2 System Board The desktop and minitower models of the Compaq Deskpro 2000 Series of Personal Computers have a single system board configuration. The Pentium system board uses an Intel Pentium processor. The Pentium II system board uses the Intel Pentium II processor. The processors are designed using MMX technology. The desktop units of both systems have the I/O panel mounted to the system board and is spared with the I/O panel. On the minitower, the system board is attached to a sliding tr
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L2 cache memory for all Pentium II models is integrated in the processor module with a capacity of 512 KB and is not upgradable. 1.3.6 Graphics Controllers The purpose of a graphics controller is to generate the text and graphics images for the monitor screen. The quality of the picture you see depends on the resolution of the monitor, the number of colors the graphics controller can display, and the amount of graphics memory available. High resolution graphics with many colors require that the
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1.3.8 System I/O The onboard I/O controller integrates the functions for the serial and parallel ports, diskette drives, the keyboard and mouse. This component provides support for the following: ■ Multimode bidirectional parallel port ❏ Standard mode: Centronics-compatible operation ❏ High-speed mode with support for an enhanced capabilities port (ECP) and enhanced parallel port (EPP) ■ One RS-232C compatible 9-pin serial port ■ Integrated real-time clock ■ 242-byte, battery-backed CMOS RAM ■ I
