Compaq Deskpro AP550, AP550 - Professional - 128 MB RAM, Professional Workstation AP550 Maintenance And Service Manual

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Addenda #1, 2, and 3 to Compaq Professional Workstation AP550 Maintenance & Service Guide

Compaq Professional Workstation AP550

Part number 135618-003

Spare part number 158279-001

The complete MSG follows these addenda.

These addenda contain changes to the original document.

registered in the U. S. Patent and Trademark Office. Product names

mentioned herein may be trademarks and/or registered trademarks of their

respective companies. First Edition (July 2000).

135618-001 1

Spare Part Numbers

Spare Part

Description

Intel Pentium III processor with heatsink (154293-001) and clip (120891-001)

600 MHz/133-MHz 162996-001 A 800 MHz/133-MHz 174768-001 A 867 MHz/133-MHz 180221-001 A

Intel Pentium III processor with heatsink (210720-001), air bafle (167373-001) and clip (120891-001)

1 GHz/133 MHz 210403-001 A

Memory Modules

64-MB ECC Direct Rambus Inline Memory Module (RIMM) 800-MHz

512-MB ECC (100-MHz SDRAM) 317748-001 A

Graphics Controllers

Matrox MGA-G400A, AGP 2x/4x 163361-001 A Intense3D Wildcat 4110, AGP 2X, 166013-001 A Intense3D Wildcat 4210, AGP Pro 202996-001 A Nvidia TNT2 PRO, 16-MB SGRAM 179997-001 A ELSA Gloria II AGP, 64 MB 174641-001 A

Matrox G200 MMS 171975-001 A Graphics adapter, DVI-i to VGA 202997-001 A Hard Drives

10-GB Ultra ATA Hard Drive, 7200 RPM 330520-001 A

20-GB Ultra ATA Hard Drive, 7200 RPM 157403-001 A

20-GB Ultra ATA Hard Drive, 7200 RPM 180475-001 A

30-GB Ultra ATA Hard Drive, 7200 RPM, Quiet Drive 180477-001 A

36.2-GB Wide-Ultra 160 SCSI Hard Drive 192197-001 A

Other Drives

48X Max CD-ROM Drive 187263-001 A

32X Max R-W CD-ROM Drive 173747-001 A

DVD-ROM Drive, 6x/32x, Opal 120417-001 B

DVD-ROM Drive, 10x/40x, Opal 161430-001 B

LS-120 SuperDisk 209938-001 A

Number

157108-001 A

Warranty Tier

Continued

2 Addenda to MSG 135618-001

Spare Part Numbers (continued)

Spare Part

Description

Fast Ethernet NIC PCI, 10/100, Wake-On-LAN 116188-001 A NIC 10/100 PCI card with Wake-On/Alert-On LAN 118042-001 A Miscellaneous Cable Kit

CD-ROM data, 12.5” (179048-001) CD-ROM data, 12.5” (105876-001) Diskette drive, 15.5” (179049-001) CD-ROM audio, 12” (288489-001) Thermal sensor (166785-001) Hard drive/CD-ROM drive data, 14” (242947-001) Hard drive data, 7” (247116-001) Hard drive/CD-ROM drive data, 14.25” (242947-008) Diskette drive data, 12” (247176-003) Hard drive, CD-ROM drive data, 10” (247116-002) Y-adapter, hard drive data (296563-001)

Number

179182-001 D

Warranty Tier

135618-001 3

Specifications – Graphics Controllers

Matrox MGA-G400A Graphics Controller

Graphics

memory Color palette*

64 K colors (16-bit) 2048 x 1536 1800 x 1440 1600 x 1200

16 MB

16 M colors (32-bit) 1600 x 1200 1280 x 1024 1280 x 1024 64 K colors (16-bit) 2048 x 1536 2048 x 1536 2048 x 1536

32 MB

16 M colors (32-bit) 2048 x 1536 2048 x 1536 1800 x 1440

* 3D acceleration is only available with a 16- or 32-bit color palette.

Intense3D Wildcat 4110 Graphics Controller

Supported Resolutions Without Multisampling

Aspect Ratio 96 128 160 192

Double-buffering

without Z-buffering

Maximum display resolution

Double buffering

with 16-bit Z-

buffering

bits per pixel

Double buffering

with 32-bit Z-

buffering

4 x 3 1824x1368

(65 Hz)

5 x 4

16 x 9

16 x 10

5 x 4 Frame Sequential Stereo

4 x 3 Frame Sequential Stereo

1280x1024

(85 Hz)

2048x1152

(70 Hz)

1920x1200

(70 Hz)

1280x1024

(52 Hz)

1280x960

(60 Hz)

1600x1200

(75 Hz)

1280x1024

(85 Hz)

1920x1080

(75 Hz)

1824x1128

(75 Hz)

N/A 1280x1024

1152x864

(60 Hz)

1824x1368

1280x1024

2048x1152

1920x1200

1280x960

(65 Hz)

(85 Hz)

(70 Hz)

(52 Hz)

(60 Hz)

1600x1200

(75 Hz)

1280x1024

(85 Hz)

1920x1080

(75 Hz)

1824x1128

(75 Hz)

N/A

1152x864

(60 Hz)

Supported Resolutions with Multisampling

Aspect Ratio 128 bits per pixel 192 bits per pixel

4 x 3 1152x864 (85 Hz) 1024x768 (85 Hz)

5 x 4 16 x 9 16 x 10

N/A N/A

1360x766 (85 Hz) 1280x720 (85 Hz)

1280x800 N/A

4 x 3 Frame Sequential Stereo

4 Addenda to MSG 135618-001

800x600 (60 Hz) 800x600 (60 Hz)

Specifications – Graphics Controllers (continued)

Intense3D Wildcat 4210 Graphics Controller

Supported Resolutions Without Multisampling

bits per pixel

Aspect Ratio 96 128 160 192

4 x 3 1920 x 1440

(60 Hz)

5 x 4

16 x 9

16 x 10

5 x 4 Frame Sequential Stereo

4 x 3 Frame Sequential Stereo

1600 x 1280

(76 Hz)

2048 x 1152

(75 Hz)

1920 x 1200

(75 Hz)

1280 x 1024

(60 Hz)

128 0x 960

(60 Hz)

1920 x 1440

(60 Hz)

1600 x 1280

(76 Hz)

2048 x 1152

(75 Hz)

1920 x 1200

(75 Hz)

1280 x 1024

(60 Hz)

1280 x 960

(60 Hz)

1920 x 1440

(60 Hz)

1600 x 1280

(76 Hz)

2048 x 1152

(75 Hz)

1920 x 1200

(75 Hz)

1280 x 1024

(60 Hz)

1280 x 960

(60 Hz)

1920 x 1440

(60 Hz)

1600 x 1280

(76 Hz)

2048 x 1152

(75 Hz)

1920 x 1200

(75 Hz)

1280 x 1024

(60 Hz)

1280 x 960

(60 Hz)

Supported Resolutions with Multisampling

Aspect Ratio 128 bits per pixel 192 bits per pixel

4 x 3 1600 x 1200 (85 Hz) 1360 x 1024 (85 Hz)

5 x 4 16 x 9 16 x 10

1600 x 1280 (76 Hz) 1280 x 1024 (94 Hz) 1920 x 1080 (85 Hz) 1600 x 900 (85 Hz) 1824 x 1128 (75 Hz) 1600 x 1024 (76 Hz)

4 x 3 Frame Sequential Stereo

1280 x 960 (60 Hz) 1280 x 960 (60 Hz)

135618-001 5

Specifications – Graphics Controllers (continued)

Matrox G200 Quad MMS Graphics Controller

Refresh Rate/Display

Graphics

Memory Aspect Ratio Resolution Vertical Horizontal

32 MB 4:3/5:4 640 x 480

800 x 600 1024 x 768 1152 x 864 1280 x 1024 1600 x 1200 1800 x 1440

32 MB 16:9/16:10 856 x 480

1280 x 720 1600 x 1024 1920 x 1080 1920 x 1200

60 - 200 Hz 60 - 200 Hz 30 - 140 Hz 60 - 120 Hz 60 - 100 Hz 60 - 90 Hz 60 - 70 Hz

60 – 200 Hz 60 – 100 Hz 60 - 100 Hz 60 - 80 Hz 60 - 76 Hz

31 – 102 kHz 38 – 114 Khz 48 - 113 kHz 54 - 110 kHz 64 - 107 kHz 75 - 13 kHz 89 - 1 04 kHz

30 – 108 kHz 44 – 76 kHz 64 – 108 kHz 70 – 94 kHz 75 – 95 kHz

ELSA Gloria II AGP Graphics Controller

Graphics

Memory

64 MB 16.7M 640 x 480

* Refresh rate may function but may not be officially supported by Compaq.

Maximum Colors

Supported Resolution

800 x 600 1024 x 768 1152 x 864 1280 x 800 1280 x 960

1280 x 1024 1600 x 1000 1600 x 1000 1600 x 1200 1600 x 1280 1600 x 1280 1900 x 1080 1920 x 1080 1920 x 1200 1900 x 1200 2048 x 1536

Maximum Refresh

Rate

120 Hz 120 Hz 120 Hz 100 Hz 100 Hz 100 Hz 100 Hz 100 Hz* 85 Hz 85 Hz 85 Hz 75 Hz 85 Hz 75 Hz 85 Hz* 75 Hz 75 Hz

Memory Dedicated to Texture Support

60 MB 58 Mb 54 MB 52 MB 52 MB 49 MB 48 MB 45 MB 45 MB 41 MB 40 MB 40 MB 39 MB 39 MB 37 MB 37 MB 27 MB

6 Addenda to MSG 135618-001

Air Baffle Assembly

135618-001 7

Compaq Professional Workstation AP550

Maintenance and Service Guide

Professional Workstation AP550

Maintenance and Service Guide

First Edition (October 1999) Part Number 135618-001 Spare Part Number 158279-001 Compaq Computer Corporation

Notice

The information in this publication 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 INFORMATION IS PROVIDED “AS IS” AND COMPAQ COMPUTER CORPORATION DISCLAIMS ANY WARRANTIES, EXPRESS, IMPLIED OR STATUTORY AND EXPRESSLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE, GOOD TITLE AND AGAINST INFRINGEMENT.

This publication contains information protected by copyright. No part of this publication may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation.

The software may be used or copied only in accordance with the terms of the agreement. Compaq, Compaq Insight Manager, ROMPaq, QVision, NetFlex, QuickFind, PaqFax, registered United

States Patent and Trademark Office. Fastart, Netelligent and SoftPaq are trademarks and/or service marks of Compaq Computer Corporation. Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of Microsoft Corporation. Pentium is a registered trademark and Xeon is a trademark of Intel Corporation. Other product names mentioned herein may be trademarks and/or registered trademarks of their respective

companies.

Compaq Professional Workstation AP550 Maintenance and Service Guide First Edition (October 1999) Part Number 135618-001 Spare Part Number 158279-001

About This Guide

Symbols in Text.........................................................................................................vii

Compaq Technician Notes........................................................................................viii

Where to Go for Additional Help ...............................................................................ix

Telephone Numbers.............................................................................................ix

Chapter 1

Illustrated Parts Catalog

Overview.................................................................................................................. 1-2

Mechanical Parts............................................................................................... 1-2

System Components ......................................................................................... 1-3

Spare Parts List ........................................................................................................ 1-4

Mechanical Components................................................................................... 1-4

System Components ......................................................................................... 1-5

Memory............................................................................................................. 1-6

Mass Storage Devices....................................................................................... 1-7

Cable Kits ......................................................................................................... 1-8

Graphic Controllers........................................................................................... 1-9

Network Controllers ....................................................................................... 1-10

Input/Output Devices...................................................................................... 1-11

Software and Miscellaneous........................................................................... 1-12

Documents...................................................................................................... 1-12

Chapter 2

Service Preliminaries

Overview.................................................................................................................. 2-1

Preliminary Warnings and Cautions ........................................................................ 2-2

Electrostatic Discharge Information ........................................................................ 2-3

Equipment Symbols................................................................................................. 2-3

Tools and Software Requirements........................................................................... 2-4

Warranty Information .............................................................................................. 2-4

iv Compaq Professional Workstation AP550 Maintenance and Service Guide

Chapter 3

Removal and Replacement Procedures

Introduction.............................................................................................................. 3-1

Serial Number.......................................................................................................... 3-2

Service Preparations................................................................................................. 3-3

Cable Lock............................................................................................................... 3-3

Workstation Access Panel........................................................................................ 3-4

Front Bezel............................................................................................................... 3-6

Subpanel and Bezel Blanks...................................................................................... 3-7

Mass Storage Devices.............................................................................................. 3-9

Drive Positions.................................................................................................. 3-9

3.5-Inch Hard Drive........................................................................................ 3-11

3.5-Inch Drive with 5.25-Inch Drive Adapter................................................. 3-13

5.25-Inch Drive............................................................................................... 3-16

Installing Optional SCSI Devices .......................................................................... 3-18

Important Guidelines for Installing Optional SCSI Devices .......................... 3-18

Using the Multi-Mode (SCSI) Cable.............................................................. 3-20

Drivelock................................................................................................................ 3-21

Expansion Boards .................................................................................................. 3-23

Removing an Expansion Board ...................................................................... 3-24

Installing an Expansion Board........................................................................ 3-25

Serial Port Cover Connector.................................................................................. 3-27

Card Guide............................................................................................................. 3-28

Memory Modules................................................................................................... 3-29

Overview......................................................................................................... 3-29

RIMM Slot Locations and Configurations ..................................................... 3-30

Removing and Installing RIMMs ................................................................... 3-31

DIMM Location and Configurations.............................................................. 3-34

Removing and Installing DIMMs................................................................... 3-35

Processor................................................................................................................ 3-40

Removing a Processor .................................................................................... 3-40

Installing an Additional Pentium III Processor............................................... 3-41

Removing the Heatsink from the 733-MHz Processor................................... 3-43

Processor Guide Rails (URM)........................................................................ 3-45

Speaker................................................................................................................... 3-46

System Board Fan.................................................................................................. 3-47

Power Supply......................................................................................................... 3-48

Power Switch ......................................................................................................... 3-50

System Board......................................................................................................... 3-51

I/O Panel ................................................................................................................ 3-53

Lithium Battery...................................................................................................... 3-54

Converting a Minitower to a Desktop Configuration ............................................ 3-56

Converting a Desktop to a Minitower Configuration ............................................ 3-59

Chapter 4

Diagnostic Tools

Overview.................................................................................................................. 4-1

Power-On Self-Test (POST).................................................................................... 4-2

POST Messages ....................................................................................................... 4-3

Troubleshooting Minor Problems............................................................................ 4-9

Power Problems.............................................................................................. 4-10

Diskette Drive Problems................................................................................. 4-11

Display Problems............................................................................................ 4-12

Printer Problems ............................................................................................. 4-13

Hard Drive Problems ...................................................................................... 4-14

Hardware Installation Problems...................................................................... 4-15

DVD-ROM and CD-ROM Drive (IDE) Problems......................................... 4-16

Memory Problems........................................................................................... 4-17

SCSI Problems................................................................................................ 4-17

Network Problems .......................................................................................... 4-18

Audio Hardware Conflicts.............................................................................. 4-20

Computer Setup and Diagnostics Utilities............................................................. 4-21

Accessing the Computer Setup Menu............................................................. 4-22

Clearing Configuration Memory..................................................................... 4-25

Diagnostics Utilities........................................................................................ 4-26

Error Codes..................................................................................................... 4-31

SCSI Error Codes................................................................................................... 4-39

Upgrading the ROM............................................................................................... 4-42

Local ROM Flash............................................................................................ 4-42

Remote ROM Flash ........................................................................................ 4-43

FailSafe Boot Block ROM..................................................................................... 4-43

Fault Management.................................................................................................. 4-45

SMART III Hard Drive Fault Prediction........................................................ 4-45

Ultra ATA Integrity Monitoring..................................................................... 4-45

Compaq Insight Manager....................................................................................... 4-46

Compaq Management Agents for Workstations.................................................... 4-46

Compaq Restore CD .............................................................................................. 4-47

Compaq Diagnostics for Windows NT.................................................................. 4-48

Contents v

Chapter 5

System Security

Security Features...................................................................................................... 5-1

Setup Password................................................................................................. 5-2

Windows NT Workstation Password................................................................ 5-6

National Keyboard Delimiter Characters.......................................................... 5-7

Advanced Security Management ............................................................................. 5-8

Reenabling Diskette Boot or Diskette Write..................................................... 5-8

Reenabling a Serial Port or Parallel Port .......................................................... 5-9

Cable Lock Provision........................................................................................ 5-9

vi Compaq Professional Workstation AP550 Maintenance and Service Guide

Chapter 6

Jumper and Switch Information

Overview.................................................................................................................. 6-1

Mass Storage............................................................................................................ 6-3

9.1-GB Ultra3 SCSI Hard Drive....................................................................... 6-3

18-GB Ultra3 SCSI Hard Drive........................................................................ 6-4

CD-ROM or DVD-ROM Drive........................................................................ 6-5

Zip Drive........................................................................................................... 6-5

Chapter 7

Physical and Operating Specifications

Overview.................................................................................................................. 7-1

System Unit.............................................................................................................. 7-2

375-W Power Supply............................................................................................... 7-8

Diskette Drive.......................................................................................................... 7-9

Zip Drive................................................................................................................ 7-10

CD-ROM Drive ..................................................................................................... 7-14

DVD-ROM Drive .................................................................................................. 7-16

Hard Drives............................................................................................................ 7-18

Audio System......................................................................................................... 7-21

Keyboard................................................................................................................ 7-21

Mouse..................................................................................................................... 7-22

Graphics Controllers.............................................................................................. 7-23

Network Controller................................................................................................ 7-25

RJ-45 Network Cable Specifications.............................................................. 7-25

Chapter 8

External Connectors

Overview.................................................................................................................. 8-1

Physical Location..................................................................................................... 8-1

Pin Assignments....................................................................................................... 8-3

Index

About This Guide

This maintenance and service guide is a troubleshooting guide that can be used for reference when servicing Compaq Professional Workstation AP550.

IMPORTANT:

who are knowledgeable of the procedures, precautions, and hazards associated with equipment containing hazardous energy circuits.

Symbols in Text

These symbols may be found in the text of this guide. They have the following meanings.

IMPORTANT:

NOTE:

Text set off in this manner presents commentary, sidelights, or interesting points of information.

WARNING:

levels, only authorized service technicians should attempt to repair this equipment. Improper repairs could create conditions that are hazardous.

WARNING:

could result in bodily harm or loss of life.

CAUTION:

damage to equipment or loss of information.

To reduce the risk of personal injury from electrical shock and hazardous energy

The installation of options and servicing of this product shall be performed by individuals

Text set off in this manner indicates that failure to follow directions in the warning

Text set off in this manner indicates that failure to follow directions could result in

Text set off in this manner presents clarifying information or specific instructions.

viii Compaq Professional Workstation AP550 Maintenance and Service Guide

Compaq Technician Notes

WARNING:

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 wiring board modifications may void any warranty.

WARNING:

levels, do not exceed the level of repair specified in these procedures. Because of the complexity of the individual boards and subassemblies, do not attempt to make repairs at the component level or to make modifications to any printed wiring board. Improper repairs could create conditions that are hazardous.

WARNING:

■

CAUTION:

clearance at the front and back of the computer.

Only authorized technicians trained by Compaq should attempt to repair this

To reduce the risk of personal injury from electrical shock and hazardous energy

To reduce the risk of electric shock or damage to the equipment:

If the system has multiple power supplies, disconnect power from the system by unplugging all power cords from the power supplies.

Do not disable the power cord grounding plug. The grounding plug is an important safety feature.

Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all times.

To properly ventilate your system, you must provide at least 12 inches (30.5 cm) of

CAUTION:

plug the AC power cord into a properly grounded AC outlet only.

The computer is designed to be electrically grounded. To ensure proper operation,

Where to Go for Additional Help

In addition to this guide, the following information sources are available:

■

User documentation

■

Compaq Service Quick Reference Guide

■

Service Training Guides

■

Compaq Service Advisories and Bulletins

■

Compaq QuickFind

■

Compaq Insight Manager

■

Workstation Reference Library CD

NOTE:

The Workstation Reference Library CD contains detailed product information on the graphics

controller, certain options, and the safety and comfort guide. All documents are presented in PDF file format with an easy-to-use graphical interface. When the CD is inserted into the CD-ROM, the CD automatically detects the operating system language and loads the corresponding language files (if available).

About This Guide ix

■

Compaq Download Facility: Call 1-281-518-1418

Telephone Numbers

For the name of your nearest Compaq authorized reseller:

■

In the United States, call 1-800-345-1518

■

In Canada, call 1-800-567-1616

For Compaq technical support:

■

In the United States and Canada, call 1-800-386-2172

■

For Compaq technical support phone numbers outside the United States and Canada, visit the Compaq website:

http://www.compaq.com

Chapter

Illustrated Parts Catalog

This chapter provides an illustrated parts breakdown and a reference for spare parts for the Compaq Professional Workstation AP550.

1-2

Compaq Professional Workstation AP550 Maintenance and Service Guide

Overview

Mechanical Parts

Figure 1-1. Exploded view for the Compaq Professional Workstation AP550 mechanical parts

System Components

Illustrated Parts Catalog

1-3

Figure 1-2. Exploded view for the Compaq Professional Workstation AP550 system components

1-4

Compaq Professional Workstation AP550 Maintenance and Service Guide

Spare Parts List

Mechanical Components

Figure 1-3. Mechanical components for the Compaq Professional Workstation AP550

Table 1-1

Mechanical Components Spare Parts List

Item Description Spare Part #

1 Workstation access panel 137384-001

2 Chassis 164540-001

3 Front bezel 158268-001

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

System Components

Illustrated Parts Catalog

1-5

Figure 1-4. System components for the Compaq Professional Workstation AP550

Table 1-2

System Components Spare Parts List

Item Description Spare Part #

1 Intel Pentium III Processor, 600EB-MHz with a 133-MHz front-side bus 152818-001

2 Intel Pentium III Processor, 733-MHz with a 133-MHz front-side bus 163363-001*

3 Battery 153099-001

4 System board for the Compaq Professional Workstation AP550 158272-001

5 Terminator board for secondary processor slot 158271-001

6 Lock security bracket 199109-001*

7 Loud speaker 164416-001

8 Power switch and LEDs with cable 166925-001

9 375-W power supply with Power Factor Correction (PFC) 128399-001

10 Auxiliary fan (standard) on the Compaq Professional Workstation AP550 158275-001

11 Processor power module connector for optional processor 329267-001

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

1-6

Compaq Professional Workstation AP550 Maintenance and Service Guide

Memory

Figure 1-5. Memory for the Compaq Professional Workstation AP550

Table 1-3

Memory Spare Parts List

Item Description Spare Part #

1 64-MB ECC Direct Rambus Inline Memory Modules (RIMM) 600-MHz 157107-001

2 64-MB ECC Direct Rambus Inline Memory Modules (RIMM) 800-MHz 162995-001*

3 128-MB ECC Direct Rambus Inline Memory Modules (RIMM) 600-MHz 158264-001*

4 128-MB ECC Direct Rambus Inline Memory Modules (RIMM) 600-MHz 164539-001*

5 128-MB ECC Direct Rambus Inline Memory Modules (RIMM) 800-MHz 157112-001*

6 256-MB ECC Direct Rambus Inline Memory Modules (RIMM) 600-MHz 161453-001*

7 256-MB ECC Direct Rambus Inline Memory Modules (RIMM) 800-MHz 161454-001*

8 Continuity RIMMs (CRIMMs) 158265-001

9 SDRAM expansion board 158273-001

10 SDRAM expansion board stabilizer card 158276-001

11 64-MB ECC memory modules (Registered 100-MHz SDRAM) 329340-001

12 128-MB ECC memory modules (Registered 100-MHz SDRAM) ) 329341-001*

13 256-MB ECC memory modules (Registered 100-MHz SDRAM) ) 329343-001*

14 512-MB ECC memory modules (Registered 100-MHz SDRAM) ) 329344-001*

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

Mass Storage Devices

Illustrated Parts Catalog

1-7

Figure 1-6. Mass storage devices for the Compaq Professional Workstation AP550

Table 1-4

Mass Storage Device Spare Parts List

Item Description Spare Part #

1 DVD-ROM drive (6X is available on select models) 105771-001*

2 9-GB Ultra3 SCSI hard drive (10,000 rpm) 160062-001

3 18-GB Ultra3 SCSI hard drive (10,000 rpm) 160063-001

4 10-GB Ultra ATA/66 IDE hard drive (7,200 rpm) 135364-001*

5 18-GB Ultra3 SCSI hard drive (7,200 rpm) 153650-001*

6 72 TrueX CD-ROM drive (optional) 134195-001*

7 1.44-MB diskette drive 158266-001

8 40X CD-ROM drive 400807-001

9 250-MB Zip Drive (optional) 125776-001*

10 100-MB Zip Drive 401624-001*

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

1-8

Compaq Professional Workstation AP550 Maintenance and Service Guide

Cable Kits

Figure 1-7. Cable kits for the Compaq Professional Workstation AP550

Table 1-5

Cable Kits Spare Parts List

Item Description Spare Part #

1 Miscellaneous Cable Kit (166838-001, 288489-002, 247116-001, 242947-001) 166879-001

2 SCSI LVD 3-device twisted pair cable 158277-001

3 Serial port cover connector 158274-001

4 NIC Wake-on-LAN cable 166974-001*

5 Power cord 121258-001*

6 Video cable, 60 POS 164415-001*

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

Graphic Controllers

Illustrated Parts Catalog

1-9

Figure 1-8. Graphic controllers for the Compaq Professional Workstation AP550

Table 1-6

Graphics Controllers Spare Parts List

Item Description Spare Part #

1 Matrox Productiva G100 Multi-Monitor 101239-001

2 Matrox G400 16-MB 4X AGP (2D) 400437-001

3 ELSA Synergy II 32-MB 4X AGP (entry-3D) 146140-001

4 3Dlabs Oxygen GVX1 AGP (mid-3D) 146141-001

5 3Dlabs Oxygen GVX1 PCI (mid-3D) 159629-001*

6 PowerStorm 600 (enh-3D) 122926-001

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

1-10

Compaq Professional Workstation AP550 Maintenance and Service Guide

Network Controllers

Figure 1-9. Network controllers for the Compaq Professional Workstation AP550

Table 1-7

Network Controllers Spare Parts List

Item Description Spare Part #

1 Compaq NC3121 Fast Ethernet NIC PCI, 10/100, Wake-on-LAN 323556-001

2 Netelligent 16/4 TR PCI UTP/STP Controller 268010-001

3 Compaq NC3120 Fast Ethernet NIC PCI, 10/100 317606-001*

4 Compaq NC3123 Fast Ethernet NIC PCI, 10/100, Wake-on-LAN 174831-001*

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

Input/Output Devices

Item Description Spare Part #

Keyboard and Mouse

1 Keyboard, space saver 269513-001*

2 3-button mouse 327716-001*

3 Spaceball 4000 3D motion control input device (optional) 118029-001*

Monitors

4 P75 307806-xxx*

5 P1610 color monitor (Beach) 305708-xxx*

6 P1610 color monitor (Opal) 325500-xxx*

7 P110 monitor 325600-xxx*

8 TFT5000 flat panel monitor TC099 opal, touch screen, NA 325700-xxx*

Table 1-8

Input/Output Devices Spare Parts List

Illustrated Parts Catalog

1-11

9 TFT8000 flat panel monitor Opal, without protective panel, TC095,WW 307906-001*

10 TFT8000 flat panel monitor Opal, with protective panel, TC095,WW 307931-xxx*

11 TFT8000 flat panel monitor Carbon, without protective panel, TC095,WW 307932-xxx*

12 TFT8000 flat panel monitor Carbon, with protective panel, TC095,WW 307935-xxx*

13 TFT5000S Flat Panel Color (EMEA) 104751-021*

14 TFT5000S Flat Panel Color (outside EMEA) 122729-xx1*

15 V1000 Color Monitor 351756-xxx*

16 V900 Color Monitor 303500-xxx*

17 V700 Color Monitor 325800-xxx*

18 S900 Color Monitor 360512-xxx*

19 S700 Color Monitor 360512-xxx*

20 TFT 500:

Note:

Parts or components marked with an asterisk (*) are

Order TFT 500 spare part from the TFT 500 guide (PN 285012-001)

not

illustrated.

1-12

Compaq Professional Workstation AP550 Maintenance and Service Guide

Software and Miscellaneous

Table 1-9

Software and Miscellaneous Spare Parts List

Item Description Spare Part #

Software

1 Microsoft Windows NT Workstation 4.0 CD 275573-xx1*

Miscellaneous

Documents

2 3.5- to 5.25-inch diskette drive mounting bracket with screws and brace for

use in bay 3 only

3 3.5- to 5.25-inch hard drive mounting bracket 243231-001*

4 3.5- to 5.25-inch ½ height mounting bracket for use in bays 1 and 2 only 243230-002*

5 Shipping box with buns (US) 166990-001*

6 Shipping box with buns (INTL) 166990-002*

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

166923-001*

Table 1-10

Document Spare Parts List

Item Description Spare Part #

1 Maintenance and Service Guide 158279-001*

2 Illustrated Parts Map 158280-001*

3 Service Quick Reference Guide (revision 040) 162212-001*

Note:

Parts or components marked with an asterisk (*) are

not

illustrated.

Overview

Service Preliminaries

This chapter identifies the following service considerations:

■

Preliminary warnings and cautions

■

Electrostatic discharge information

■

Equipment symbols

■

Tools and software requirements

Chapter

■

Warranty information

IMPORTANT:

proper service.

Adherence to the procedures and precautions described in this chapter is essential for

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Preliminary Warnings and Cautions

The following should be noted when operating or servicing the Compaq Professional Workstation AP550:

WARNING:

■

WARNING:

service technicians should attempt to repair this equipment. 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

CAUTION:

power section. This section is always active as long as the unit is plugged into a live AC outlet. Be sure to turn off the switch and unplug the power cord before performing any service work.

CAUTION:

clearance at the front of the workstation and 3 inches (7.6 cm) at the back.

CAUTION:

plug the AC power cord into a properly grounded AC outlet only.

To reduce the risk of electric shock or damage to the equipment:

If the system has multiple power supplies, disconnect power from the system by unplugging all power cords from the power supplies.

Do not disable the power cord grounding plug. The ground plug is an important safety feature.

Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all times

To reduce the risk of personal injury from hazardous energy levels, only authorized

The power supply in the Compaq Professional Workstation AP550 has an auxiliary

To properly ventilate the system, you must provide at least 6 inches (15 cm) of

The workstation is designed to be electrically grounded. To ensure proper operation,

CAUTION:

should be excised whenever removing or replacing these components.

IMPORTANT:

any warranty.

RIMMs can reach a temperature of 212° F (100° C) in a matter of minutes. Caution

Any indications of component replacement or printed wiring board modifications may void

Electrostatic Discharge Information

A discharge of static electricity can damage static-sensitive devices or microcircuitry. Proper packaging and grounding techniques are necessary precautions to prevent damage. To prevent electrostatic damage:

■

Transport products in static-safe containers such as conductive tubes, bags, or boxes.

■

Keep electrostatic-sensitive parts in their containers until they arrive at static-free stations.

■

Cover workstations with approved static-dissipating material. Provide a wrist strap connected to the work surface and properly grounded tools and equipment.

■

Keep work area free of non-conductive materials such as ordinary plastic assembly aids and foam packing.

■

Always be sure you are properly grounded when touching a static-sensitive component or assembly.

■

Avoid touching pins, leads, or circuitry.

■

Always place drives PCB assembly–side down.

■

Use conductive field service tools.

Service Preliminaries

2-3

Equipment Symbols

The following symbols are located on applicable components of the workstation and should be observed when servicing the workstation to avoid personal injury or damage to the components:

WARNING:

Connection. To reduce risk of electrical shock, fire, or damage to the equipment, do not plug telephone or telecommunications connectors into this receptacle.

WARNING:

indicates the presence of a hot surface or hot component. If this surface is contacted, the potential for injury exists. To reduce risk of injury from a hot component, allow the surface to cool before touching.

WARNING:

indicates the presence of electrical shock hazards. The enclosed area contains no operator-serviceable parts. To reduce risk of personal injury from electrical shock hazards, do not open this enclosure.

Any RJ-45 receptacle marked with this symbol indicates a Network Interface

Any surface or area of the equipment marked with these symbols

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Tools and Software Requirements

To service the workstation, you might need the following:

■

Torx T-10 screwdriver

■

Torx T-15 screwdriver

■

Flat-blade screwdriver

■

Diagnostics diskette

IMPORTANT:

workstation SSD for Windows NT are installed. See Chapter 4 for installation procedures.

Before servicing the workstation, be sure that the drivers from the latest Compaq

Warranty Information

The workstation comes

Standard Warranty

■

Pre-Failure Warranty

■

warranty by applying it to critical system components before they fail. This warranty ensures that when you receive notification of a prefailure condition through Compaq Insight Manager or the Windows NT Event Log, the component is replaced under warranty.

NOTE:

For more information about Compaq Insight Manager, see Chapter 4.

The Pre-Failure Warranty covers the following workstation components:

SCSI hard drives

Error Correcting Code (ECC) memory

Pentium III processor

In addition to the above warranties, an optional Extended Warranty is available through CarePaq. A post warranty contract is also available on this product. If purchased, this warranty extends the Standard Warranty’s one-year coverage for labor and on-site service by two additional years.

standard

with the following warranties:

–Refer to the warranty card included with the unit.

–A special warranty that extends the Compaq three-year limited

IMPORTANT:

damaged components.

Observe all warnings and cautions provided herein. Failure to do so may void warranty for

Introduction

This chapter provides subassembly/module-level removal and replacement procedures for the Compaq Professional Workstation AP550.

After completing all necessary removal and replacement procedures, run the Compaq Setup and Diagnostics program to verify that all components are operating properly.

Chapter

Removal and Replacement Procedures

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Serial Number

Provide the computer serial number to Compaq whenever you request information or order spare parts. The serial number is located on the top corner of the workstation 1 and on the rear of the chassis 2.

For asset control, the serial number is embedded in the EPROM on the system board. If the system board is replaced with a spare part from Compaq, an invalid serial number condition will be reported during Power-On Self-Test (POST). To clear the condition, reenter the original serial number through Computer Setup.

NOTE:

POST recognizes the serial number as a valid number if a system board from another workstation

is installed.

Figure 3-1. Identifying serial number locations

Service Preparations

Removal and Replacement Procedures

3-3

Before beginning any of the removal and replacement procedures, complete the following steps:

Cable Lock

The workstation comes standard with a cable lock provision for attaching a padlock and/or cable lock. If installed, the locks must be removed before you can access internal components.

To remove the lock (199109-001):

CAUTION:

properly grounded before beginning any installation procedure. See “Electrostatic Discharge Information” in Chapter 2 for more information.

Electrostatic discharge can damage electronic components. Be sure you are

1. Turn off the workstation.

2. Disconnect the power cord from the grounded AC outlet and then from the workstation.

IMPORTANT:

AC outlet.

On a power-managed system, the power cord

must

be disconnected from the grounded

3. Turn off all peripheral devices and disconnect cables from the rear of the workstation.

NOTE:

See Chapter 2 for more information on preparing the workstation for service.

1. Unlock and remove the cable lock and/or the padlock.

2. Remove the security bracket (plate) 1, which is seated over the cable lock bracket 2.

3. Unfasten the retaining screw 3 to free the cable lock bracket and to release the screw

security bracket 4.

Figure 3-2. Removing the cable lock

To replace the cable lock, reverse the above procedure.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Workstation Access Panel

To remove the workstation access panel (137384-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet

2. Loosen the two thumbscrews that secure the workstation access panel to the workstation

chassis.

Figure 3-3. Loosening the side workstation access panel thumbscrews

Before removing the workstation access panel, ensure that the workstation is

Removal and Replacement Procedures

3. Slide the workstation access panel back about 1 inch (2.5 cm), then lift it off the

workstation.

Figure 3-4. Removing the workstation access panel

3-5

To replace the workstation access panel, reverse the above procedure.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Front Bezel

To remove the front bezel (158278-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Press in on the two release tabs 1, then rotate the front bezel away from the chassis to

remove it from the workstation 2.

Figure 3-5. Removing the front bezel

To replace the front bezel, reverse the above procedure.

NOTE:

When replacing the front bezel, be sure the bottom hinge points are properly placed in the

chassis before rotating the front bezel back into its original position.

Subpanel and Bezel Blanks

NOTE:

The subpanel and bezel blanks must be removed from the front bezel if you are installing a

mass storage device for the first time, or if you are converting the unit from a minitower to a desktop configuration or from a desktop to a minitower configuration.

To remove the bezel blank from the front bezel:

1. Perform the steps in the “Service Preparations” section as previously shown.

Removal and Replacement Procedures

3-7

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the side workstation access panel.

3. Remove the front bezel.

4. Gently pull the subpanel, with the bezel blank secured in it, away from the front bezel, and

then remove the bezel blank.

CAUTION:

angle could damage the pins that align the subpanel within the front bezel.

Hold the subpanel straight when you pull it away from the front bezel. Pulling at an

Figure 3-6. Removing the subpanel and bezel blanks

To replace the subpanel and bezel blanks, reverse the above procedure. Be sure the subpanel and front bezel align properly with the alignment tabs. See Figure 3-7 for the subpanel keyed-alignment positions.

NOTE:

When switching from minitower to desktop orientation, the bezel blank should be switched out

with the replacement provided to ensure that the Compaq logo is properly oriented.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

CAUTION:

When replacing the subpanel, be sure the aligning pins and any remaining bezel

blanks are in the proper orientation to prevent damage to the alignment pins.

DESKTOP

TOWER

Figure 3-7. Identifying the subpanel keyed-alignment positions

DESKTOP/TOWER KEY

Mass Storage Devices

This section discusses removal and replacement procedures for the mass storage devices supported on the Compaq Professional Workstation AP550.

Drive Positions

The Compaq Professional Workstation AP550 can house up to five mass storage devices. The following illustration identifies the physical drive locations. See the table below for a list of recommended drive configurations.

Removal and Replacement Procedures

1 2 3 4 5

3 2 1

3-9

Figure 3-8. Identifying drive positions. The bay numbers are stamped on the chassis.

Table 3-1

Drive Positions

Bay Bay Width Bay Height Device Configurations

* You may install either a third-height or half-height drive into a half-height bay.

† Use a drive adapter to mount a high-density diskette drive into a 5.25-inch bay.

NOTE:

replacing a hard drive in bay 4 or 5, install the same type drive as you remove. If you are replacing the Ultra ATA hard drive in bay 4 or 5 with a SCSI hard drive, you will need a SCSI device option kit and the SCSI controller option kit. The controller option kit contains the SCSI controller and cable that supports multiple SCSI devices. See “Installing Optional SCSI Devices” later in this chapter for more information.

5.25-inch bay Half-height Optional drive*

5.25-inch bay Half-height CD-ROM/optional drive (1.6-inch)

3.5-inch bay Third-height Standard 1.44-MB diskette drive (1.0-inch) †

3.5-inch bay Third-height Optional hard drive (1.0-inch)

3.5-inch bay Third-height Standard hard drive

Compaq does not support mixing Ultra ATA and SCSI hard drives in the same system. If you are

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Compaq Professional Workstation AP550 Maintenance and Service Guide

IMPORTANT:

Compaq has provided extra guide screws, installed in the front of the workstation chassis behind the front bezel. Some options use 5.25 M3 metric screws, and some use HD 6-32. The Compaq-supplied metric screws are black.

NOTE:

devices, such as IDE CD-ROM, tape, and diskette drives, to the secondary controller.

You must install guide screws to ensure that the drives line up correctly in the drive cage.

For optimal performance, connect hard drives to the primary controller. Connect expansion

6-32

Figure 3-9. Identifying the metric (M3) screws

3.5-Inch Hard Drive

To remove a 3.5-inch hard drive:

1. Perform the steps in the “Service Preparations” section as previously shown.

Removal and Replacement Procedures

3-11

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Remove the front bezel.

4. Disconnect the power 1 and data 2 cables from the back of the hard drive.

Figure 3-10. Disconnecting the hard drive cables

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Compaq Professional Workstation AP550 Maintenance and Service Guide

5. Raise the drivelock to unlock the hard drive.

Figure 3-11. Releasing the hard drive by raising the drivelock

6. Hold the drivelock up while you push the drive from the rear and remove it from the front

of the drive bay 1.

Figure 3-12. Removing a 3.5-inch hard drive

7. Remove the two guide screws from each side of the drive 2.

Removal and Replacement Procedures

To replace the 3.5-inch hard drive:

1. Install two guide screws on each side of the replacement drive, making sure the guide

screws line up with the guide slots.

2. Slide the hard drive into the drive bay until it snaps into place.

3-13

IMPORTANT:

80-conductor Ultra ATA cable for optimal performance. This cable is included in the hard drive option kit.

When installing a second Ultra ATA hard drive on the primary controller, you must use an

3.5-Inch Drive with 5.25-Inch Drive Adapter

To remove a 3.5-inch drive with a 5.25-inch drive adapter (166923-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

2. Remove the workstation access panel.

3. Remove the front bezel.

4. Disconnect the cables from the back of the drive.

5. Raise the drivelock to unlock the drive.

Before removing the workstation access panel, ensure that the workstation is

Figure 3-13. Releasing the hard drive by raising the drivelock

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Compaq Professional Workstation AP550 Maintenance and Service Guide

6. Hold the drivelock up while you push the drive from the rear and remove it from the front

of the drive bay.

Figure 3-14. Removing a 3.5-inch drive from a 5.25-inch drive bay

Removal and Replacement Procedures

7. To remove the bracket brace from the top of the drive adapter, squeeze in on both sides of

the brace 1, then rotate the brace up and out 2.

8. Remove the drive bezel 3.

9. Remove the screws that secure the hard drive to the drive adapter 4.

10. Remove the hard drive from the drive adapter 5.

3-15

Figure 3-15. Removing a 3.5-inch drive from the 5.25-inch drive adapter

To replace the drive, reverse the above procedure.

IMPORTANT:

NOTE:

use a special adapter bracket. (See Chapter 1 for the spare part number.)

If you are installing a 3.5-inch diskette drive into bay 3, you must use a special adapter bracket. (See Chapter 1 for the spare part number.)

The primary 3.5-inch diskette drive should only be installed into bay 3.

If you are installing a second 3.5-inch diskette drive into bay 1 or 2 for the first time, you must

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Compaq Professional Workstation AP550 Maintenance and Service Guide

5.25-Inch Drive

To remove a 5.25-inch drive:

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Remove the front bezel.

4. Disconnect the power 1, data 2, and audio 3 cables from the back of the hard drive.

Figure 3-16. Disconnecting the cables

Removal and Replacement Procedures

5. Raise the drivelock to unlock the drive.

Figure 3-17. Releasing the hard drive by raising the drivelock

6. Hold the drivelock in its elevated position while you push the hard drive from the rear and

remove it from the front of the drive bay.

3-17

Figure 3-18. Removing a 5.25-inch drive

To replace the hard drive:

1. Install two M3 guide screws (Figure 3-9) into the bottom holes on each side of the

replacement drive, making sure the guide screws line up with the guide slots.

2. Slide the drive into the drive bay until it snaps into place.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Installing Optional SCSI Devices

Select models of the Compaq Professional Workstation AP550 have a preinstalled internal SCSI hard drive. You can install additional SCSI devices using the external SCSI connector located on the rear panel of the workstation.

Important Guidelines for Installing Optional SCSI Devices

If you are installing additional SCSI devices, you

Table 3-2

Installing Optional SCSI Devices

Guidelines Comment

A narrow SCSI controller allows you to daisy-chain up to seven additional SCSI devices.

A single Ultra SCSI, Ultra-Wide SCSI, or Wide-Ultra SCSI controller allows you to daisy-chain up to 15 additional SCSI devices.

The SCSI controller requires a unique SCSI ID (0-7 or 8-15) for each SCSI device installed. The controller identifies a SCSI device by its SCSI ID number rather than its location.

SCSI ID 0 is reserved for the primary hard drive. SCSI ID 7 is reserved for the controller.

If only one SCSI hard drive is used, install it in the lowest-numbered bay (bay 1).

Every SCSI chain or circuit must be terminated (closed) at both ends. Termination can be accomplished in one of several ways:

MUST

adhere to the following guidelines:

Counting the controller, that amounts to eight total SCSI devices

Counting the controller, that amounts to 16 total SCSI devices.

Moving a SCSI device from one position to another on the SCSI chain does not affect communication between the controller and the device.

SCSI IDs 1 through 6 and 8 through 15 are available for all other SCSO devices.

Some system boards have both ends of the SCSI cable connected to, and terminated by, the system board.

Use a cable with a built-in terminator.

■

Use a cable with a terminating resistor plug in

■

the last connector.

Connect a SCSI device with its termination

■

enabled into the last connector.

Connect an external SCSI device with its

■

termination enabled to the external SCSI connector on the rear panel of the computer.

continued

Table 3-2 Installing Optional SCSI Devices

Guidelines Comment

continued

Removal and Replacement Procedures

3-19

Turn on all external SCSI device power to the workstation.

All SCSI hard drives must be either internal or external, but never both.

Do not mix Wide-Ultra and narrow SCSI devices on the same SCSI chain or the same controller.

Do not mix Wide-Ultra2 and Ultra3 with other types of SCSI devices.

If two controllers are installed, each may use SCSI devices having widths and speeds different from the other.

CAUTION:

manner may block airflow to the power supply, causing it to overheat.

Do not route cables near the intake to the power supply. Cables routed in this

before

turning on the

This enables the system board controller to recognize the external SCSI device.

The system accommodates a combination of other external and internal SCSI devices, such as tape and CD-ROM drives.

Wide-Ultra can only be mixed with Wide-Ultra SCSI devices. Narrow can only be mixed with narrow SCSI devices.

Wide-Ultra2 and Ultra3 SCSI devices can only be mixed with each other and can coexist in any combination.

If a 68-pin data cable is used on a controller having a 50-pin SCSI devices, use an internal cable adapter (Compaq number 199618-001) or an external cable adapter (Compaq number 270187-B21).

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Using the Multi-Mode (SCSI) Cable

The workstation ships standard with a three-device multi-mode (SCSI) cable that supports both low voltage differential (LVD) and single ended (SE) devices and has a terminator 1 on one end. The cable end connects to the internal LVD/SE connector on the system board, with the remaining three connectors connecting to the devices in the drive bays.

Figure 3-19. Multi-mode cable (SCSI) with terminator

NOTE:

The multi-mode cable included with your workstation may differ from the one pictured.

For additional information about installing optional SCSI devices, refer to the documentation included with the device option kit.

Drivelock

Removal and Replacement Procedures

The workstation chassis drivelocks secure the drives in both the minitower and desktop configurations.

To remove the drivelocks:

1. Perform the steps in the “Service Preparations” section as previously shown.

3-21

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Remove the front bezel.

4. Remove all drives from the computer.

5. Lift the side of each drivelock nearest you and push it toward the front of the drive

cage 1, then snap the tabs out of the holes in the drive cage 2.

CAUTION:

The spring under the drivelock may pop out unexpectedly.

6. Remove the drivelock from the drive cage.

7. Remove the spring from the drivelock 3.

Figure 3-20. Removing the drivelock

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Compaq Professional Workstation AP550 Maintenance and Service Guide

To reinstall the drivelocks:

1. Insert the left side of the drivelock (with the rounded tabs) into the slots on the

drive cage 1.

2. Place the washer on the middle tab on the underside of the drivelock.

3. Compress the spring 2, and then lower the drivelock onto the drive cage until it snaps into

place 3.

Figure 3-21. Reinstalling the drivelock

Expansion Boards

The following illustration identifies the physical location of expansion slots. All connectors populate full-length boards. See the corresponding table for component names.

1 2 3 4

Removal and Replacement Procedures

3-23

Figure 3-22. Overview of the expansion board slots

Table 3-3

Expansion Board Slots

Reference Description

PCI expansion board slot

Accelerated Graphics Port (AGP) 4X Pro slot

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Removing an Expansion Board

To remove an expansion board:

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Disconnect any cables from the expansion board.

4. Remove the expansion board retaining screw.

5. Hold the board at each end and carefully rock it back and forth until the connectors pull

free from the slot. Be sure not to scrape the board against other components.

Figure 3-23. Removing an expansion board

6. Store the board in antistatic packaging.

7. Install an expansion slot cover to close the open slot.

8. Replace the workstation access panel.

9. Plug the network cable back into the system. Plug the power cord back into the grounded

AC outlet, and reconnect external devices.

Installing an Expansion Board

If the expansion board comes with jumper or switch settings, be sure to follow the setting instructions that have been provided with the board.

To install a PCI expansion board:

1. Turn off the workstation and disconnect the power cord from the grounded AC outlet and

the back of the workstation. Disconnect the network cable and any external devices from the system.

2. Remove the workstation access panel and locate the correct vacant slot in the workstation

chassis.

3. Remove the screw securing the expansion slot cover, and then remove the slot cover as

illustrated.

Removal and Replacement Procedures

3-25

Figure 3-24. Removing the screw and expansion slot cover

To replace an expansion slot cover, reverse the above procedure.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Refer to the following illustration to install a PCI expansion board.

1. Slide the expansion board into the expansion slot and press it firmly into place.

Figure 3-25. Installing an expansion board

IMPORTANT:

connector seats properly in the expansion board slot.

NOTE:

card guide.

When you install an expansion board, press firmly on the board so that the whole

If you are installing a full-length PCI expansion board, make sure the board is engaged with the

2. Replace the screw at the side of the expansion slot.

3. Replace the workstation access panel.

4. Connect external cables to the installed board, if needed.

5. Plug the network cable back into the system. Plug the power cord back into the grounded

AC outlet. Reconnect external devices.

Serial Port Cover Connector

To remove the cover plate for serial ports Com1 and Com2 (158274-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

Removal and Replacement Procedures

3-27

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Rotate the workstation to the desktop position.

4. Unplug the serial port cover connector from the system board.

Figure 3-26. Removing the serial port cover connector

5. Remove the screw holding the serial port cover connector to the chassis, and lift the plate

out of the chassis.

To replace the serial port cover connector, reverse the above procedure.

NOTE:

The connector is keyed; therefore, locate the key pin header on the system board when

reattaching the serial port cable.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Card Guide

To remove the card guide:

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Remove any full-length expansion boards.

4. Push down on the two tabs on the top of the card guide 1.

5. While holding the tabs down, remove the card guide from the chassis 2.

Figure 3-27. Removing the card guide

To replace the card guide, reverse the above procedure.

Memory Modules

Overview

The Compaq Professional Workstation AP550 supports the following memory modules:

RIMMs

■

Correcting (ECC) Direct Rambus Inline Memory Modules (RIMMs). Additional RIMMs are available to upgrade the memory. A maximum of 32-count Direct RDRAMs is supported. The workstation memory includes Dual Direct RDRAM channels with 32-line cache to store prefetched information.

NOTE:

600-MHz represents the total data transfer rate with a 300-MHz bus.800-MHz represents the

total data transfer rate with a 400-MHz bus.

The workstation has four RIMM sockets on the system board (two per memory channel) to support a maximum of 2-gigabyte of memory with 256-megabit Direct RDRAM technology. RIMM modules must be installed in pairs across both channels, for example, one module in socket XMM1 and the other module in socket XMM3. Each pair of memory modules must be of the same type, speed, and size. This information can be found on the label affixed to the RIMM. Continuity RIMMs (CRIMMs) must populate empty RIMM slots. If CRIMMs are not installed in the empty RIMM sockets, the system will not boot.

Removal and Replacement Procedures

—The workstation supports 600-MHz and 800-MHz Error Checking and

3-29

DIMMs

■

—Some workstation models come with a synchronous dynamic random access memory (SDRAM) expansion board installed that supports at least 64-megabyte of Error Checking and Correcting (ECC). The SDRAM expansion board allows the use of up to four dual inline memory modules in a RIMM-based system.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

RIMM Slot Locations and Configurations

Your workstation supports four RIMM sockets on two Dual Direct RDRAM channels. Both channels support 32-line cache, which stores prefetched information. A maximum of 32 Direct RDRAM devices is supported per channel.

The four RIMM sockets are numbered XMM1 and XMM2 (Channel A) and XMM3 and XMM4 (Channel B).

1 3 42

Figure 3-28. RIMM sockets must be populated in pairs

Table 3-4

RIMM Slot Locations

Identifier Component Memory Channel

RIMM Slot XMM2 Channel A

RIMM Slot XMM1 Channel A

RIMM Slot XMM4 Channel B

RIMM Slot XMM3 Channel B

Table 3-5

RIMM Installation Configurations

Memory Channel A Memory Channel B

RIMM Pairs RIMM Slot XMM1 RIMM Slot XMM2 RIMM Slot XMM3 RIMM Slot XMM4

Pair 1 RIMM CRIMM RIMM CRIMM

Pair 2 RIMM RIMM RIMM RIMM

NOTE:

CRIMMs (Continuity RIMMs) must be installed in unpopulated RIMM slots.

Removing and Installing RIMMs

Important Guideline for RIMM Installation

Removal and Replacement Procedures

3-31

When installing RIMMs, you

MUST

follow these guidelines:

Table 3-6

RIMM Guidelines

Guideline Comment

Use only 64-, 128-, or 256-MB, 600-MHz or 800-MHz Error Checking and Correcting (ECC) RIMMs.

Do not mix 600- with 800-MHz RIMMs. Each RIMM pair must be the same type, size, and

Do not exceed 32-count Direct RDRAM devices on each Direct Rambus channel.

Install RIMMs correctly. Be sure to match the two

Populate unused RIMM sockets with a Continuity RIMM (CRIMM).

Install RIMM modules in pairs across both channels. RIMM sockets must be populated in the following

DO NOT INSTALL RIMMS THAT DO NOT SUPPORT ERROR CHECKING AND CORRECTING (ECC).

speed.

A factory label on the RIMM indicates the type, size, speed, and number of RDRAMS contained on the RIMM.

key slots

the tab on the RIMM socket. Push the RIMM down into the RIMM socket, ensuring that it is fully inserted and properly seated.

If CRIMMs are not in the empty RIMM sockets, the system will not boot.

order: XMM1 and XMM3 then XMM2 and XMM4.

on the RIMM with

Do not mix RIMMs and DIMMs on the same system board.

CAUTION:

the workstation will not function.

CAUTION:

use RIMMs with gold metal contacts (not tin-lead) to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.

CAUTION:

so may damage the module.

NOTE:

The workstation will support up to 2-gigabyte of memory with 256-megabit DRAM technology.

The above guidelines must be followed when installing RIMM modules; otherwise,

RIMM sockets have gold metal contacts. When upgrading memory, it is important to

When handling a memory module, be careful not to touch any of the contacts. Doing

The system will not boot if RIMMs and DIMMs are mixed on the same board.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

RIMM Removal

To remove a RIMM memory module:

IMPORTANT:

RIMM Installation.”

Before installing additional RIMMs, read the previous section, “Important Guidelines for

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

WARNING:

should be exercised whenever removing or replacing these components.

RIMMs can reach a temperature of 212°F (100°C) in a matter of minutes. Caution

3. Press outward on both latches of the RIMM at the same time 1. This releases the module

and pushes it partially out of the socket.

4. Lift the module from the socket 2.

Figure 3-29. Removing a memory module

NOTE:

The system recognizes memory upgrades and automatically reconfigures the workstation.

Removal and Replacement Procedures

RIMM Installation

To install a RIMM memory module:

1. Perform the steps in the “Service Preparations” section as previously shown.

3-33

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

WARNING:

should be exercised whenever removing or replacing these components.

CAUTION:

damage the module.

3. A RIMM can be installed only one way. Be sure to match the two

RIMMs can reach a temperature of 212° F (100° C) in a matter of minutes. Caution

When handling a RIMM, be careful not to touch any of the contacts. Doing so may

key slots

on the RIMM with the tab on the RIMM socket. Push the RIMM down into the RIMM socket, ensuring that it is fully inserted and properly seated.

IMPORTANT:

(CRIMMs) must be installed in all unpopulated RIMM slots.

Do not combine different Direct Rambus speeds and capacities. Continuity RIMMs

4. Press both latches inward to secure the module in the socket.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

DIMM Location and Configurations

SDRAM Expansion Boards

DIMM-based workstation models come with a synchronous dynamic random access memory (SDRAM) expansion boards installed that supports at least 64-megabyte of Error Checking and Correcting (ECC) Dual Inline Memory Modules (DIMMs).

Figure 3-30. Overview of two SDRAM expansion boards installed in alternating RIMM sockets containing one DIMM on each board

The following configuration guidelines must be followed when replacing SDRAM expansion boards.

Table 3-7

SDRAM Expansion Boards Configurations

Memory Channel RIMM Slot XMM1 RIMM Slot XMM2 RIMM Slot XMM3 RIMM Slot XMM4

Channel A SDRAM CRIMM

Channel B SDRAM CRIMM

NOTE:

CRIMMs must populate Empty RIMM slots on a system board.

Removal and Replacement Procedures

Table 3-8

DIMM Configurations on SDRAM Expansion Board

3-35

SDRAM Expansion Board 1 (RIMM Socket XMM1)

DIMM Pair Installation Upper DIMM Slot Lower DIMM Slot Upper DIMM Slot Lower DIMM Slot

Pair 1 DIMM DIMM

Pair 2 DIMM DIMM DIMM DIMM

Removing and Installing DIMMs

Important Guidelines for DIMM Installation

When installing DIMMs, you

Guideline Comment

Use only 64-, 128-, 256-, or 512-MB, Registered 100-MHz Error Checking and Correcting (ECC) DIMMs.

SDRAM expansion boards must be installed in pairs, populating the RIMM sockets in the following order: XMM1 and XMM3.

MUST

follow these guidelines:

Table 3-9

DIMM Guidelines

SDRAM Expansion Board 2 (RIMM Socket XMM3)

DO NOT INSTALL DIMMs THAT DO NOT SUPPORT ERROR CHECKING AND CORRECTING (ECC).

Only two SDRAM expansion boards are supported.

Each SDRAM expansion board supports up to two DIMMs.

A SDRAM expansion board can only be installed one way.

Total system support is up to four DIMMs providing up to 2-GB total memory when four 512-MB DIMMs are installed.

Be sure to match the two expansion board with the tab on the RIMM socket. Push the SDRAM expansion board down into the RIMM socket, ensuring that it is fully inserted and properly seated.

key slots

on the SDRAM

continued

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Table 3-9 DIMM Guidelines

continued

Guideline Comment

DIMMs must be installed in pairs, alternating between the two SDRAM expansion boards.

RIMMs and DIMMs can not be mixed on the same system board.

CRIMMs (Continuity RIMM) must populate the empty RIMM sockets (XMM2 and XMM4).

When replacing the workstation access panel, the stabilizer card (attached to the access panel) must engage the SDRAM expansion boards to balance the boards.

CAUTION:

or the workstation will not function.

CAUTION:

use SDRAM expansion boards with gold metal contacts (not tin-lead) to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.

CAUTION:

so may damage the module.

The above guidelines must be followed when installing SDRAM expansion boards,

RIMM sockets have gold metal contacts. When upgrading memory, it is important to

When handling a memory module, be careful not to touch any of the contacts. Doing

DIMM Removal

Compaq recommends populating the lower DIMM slot on each SDRAM board first, then populating the upper DIMM slots to upgrade memory.

The system will not boot if RIMMs and DIMMs are mixed on the same board.

If CRIMMs are not installed in the empty RIMM sockets, the system will not boot.

To remove a DIMM memory module:

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Lay the chassis on its side and remove the workstation access panel.

WARNING:

should be exercised whenever removing or replacing these components.

DIMMs can reach a temperature of 212° F (100° C) in a matter of minutes. Caution

Removal and Replacement Procedures

3. Press outward on both latches of the RIMM at the same time 1. This releases the

SDRAM expansion board and pushes it partially out of the socket.

4. Lift the expansion board from the socket 2.

3-37

Figure 3-31. Removing a SDRAM expansion board

5. Remove the DIMM module from the SDRAM expansion board by pressing outward on

the latches that hold the DIMM to the expansion board.

DIMM Installation

To install a DIMM memory module:

IMPORTANT:

Guidelines for DIMM Installation.”

1. Perform the steps in the “Service Preparations” section as previously shown.

2. Remove the workstation access panel.

Before installing a SDRAM expansion board, read the previous section, “Important

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

WARNING:

should be exercised whenever removing or replacing these components.

Before removing the workstation access panel, ensure that the workstation is

DIMMs can reach a temperature of 212° F (100° C) in a matter of minutes. Caution

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Compaq Professional Workstation AP550 Maintenance and Service Guide

CAUTION:

contacts. Doing so may damage the module.

When handling a SDRAM expansion board, be careful not to touch any of the

3. Insert the DIMM at a 25-degree angle 1 into the slot on the SDRAM expansion board,

ensuring that it is fully inserted and properly seated.

4. Press both latches inward 2 to secure the DIMM in the SDRAM expansion board.

Figure 3-32. Inserting a DIMM to a SDRAM expansion board

5. Install the SDRAM expansion board in the appropriate RIMM socket on the system board.

Follow the correct configuration guidelines in Table 3-8.

NOTE:

The SDRAM expansion board with an attached DIMM can be installed only one way. Be sure to match the two SDRAM expansion board down into the RIMM socket, ensuring that it is fully inserted and properly seated.

IMPORTANT:

(CRIMMs) must be installed in all unpopulated RIMM slots.

key slots

Do not combine different Direct Rambus speeds and capacities. Continuity RIMMs

on the SDRAM expansion board with the tab on the RIMM socket. Push the

6. Press both latches inward to secure the SDRAM expansion board in the socket.

Removal and Replacement Procedures

Figure 3-33. Side access panel with stabilizer card

7. When attaching the workstation access panel, assure the SDRAM expansion board

stabilizer card (attached to the side access panel) engages with the SDRAM expansion boards, holding the boards in an upright position.

3-39

NOTE:

The system recognizes memory upgrades and automatically reconfigures the workstation.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Processor

Removing a Processor

WARNING:

components to cool before touching.

To reduce the risk of personal injury from hot surfaces, allow the internal system

To remove the processor:

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

CAUTION:

secondary processor may cause damage to the primary processor.

If two processors are installed and the primary processor needs replacing, the

must

be removed before removing the primary processor. Failure to do so

3. Pull out the retaining tabs on each side of the processor 1, and then lift the processor out

of the socket 2.

Figure 3-34. Removing the processor from the system board

To install a new processor, reverse the above procedure.

NOTE:

Before installing a processor, be sure the release latches are in the locked (out) position. This will cause the latches to click into place when the processor is properly seated.

Installing an Additional Pentium III Processor

You can upgrade the workstation to a multiprocessor system. When you install a second processor, it must be the same speed, cache size, and type as the existing processor. For comprehensive instructions on installing a second processor, refer to the installation card provided in the Processor Options Kit.

Removal and Replacement Procedures

3-41

WARNING:

components to cool before touching.

CAUTION:

Compaq recommends that you have a Compaq authorized reseller or service provider install the processor. If you plan to install a processor yourself, carefully read all the instructions before you begin.

IMPORTANT:

To reduce the risk of personal injury from hot surfaces, allow the internal system

Installing the processor incorrectly may cause damage to the system board.

An empty processor slot must contain a terminator board.

To install a second Pentium III processor:

1. Turn off the workstation and disconnect the power cord from the grounded AC outlet and

the back of the workstation.

2. Remove the side workstation access panel.

3. Firmly push the processor power module down into processor power module socket.

Figure 3-35. Installing the processor power module for the second processor

4. Assure the latches on the processor power module socket are closed.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

5. Pull out the retaining tabs on each side of the terminator board 1, and then lift the

terminator board out of the socket 2.

Figure 3-36. Removing the terminator board from the secondary processor slot

Figure 3-37. Installing a second processor/heatsink assembly

6. Push the processor/heatsink into the secondary processor slot until it locks firmly into

place.

IMPORTANT:

type as the existing processor.

Do not mix processors. The second processor must be the same speed, cache size, and

Reassemble the workstation, and connect the power cord to the grounded AC outlet and to the workstation.

IMPORTANT:

Be sure to tighten both thumbscrews when replacing the workstation access panel.

Removing the Heatsink from the 733-MHz Processor

Removal and Replacement Procedures

3-43

WARNING:

components to cool before touching.

To reduce the risk of personal injury from hot surfaces, allow the internal system

To remove the heatsink from the 733-MHz processor (163363-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation side access panel.

3. Push the retaining tabs on each side of the processor outward and then lift the processor

out of the socket.

4. Slide the metal clip on the back of the processor to the left 1 and remove the clip.

Figure 3-38. Removing the metal clip from the back of the processor clip

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Compaq Professional Workstation AP550 Maintenance and Service Guide

5. Lift the processor off the pins on the back of the heatsink to remove it from the

heatsink 2.

Figure 3-39. Removing the metal clip and processor from the heatsink

To install a new processor/heatsink, reverse the above procedure.

NOTE:

Before installing a processor, be sure the release latches are in the locked (out) position. This will cause the latches to click into place when the processor is properly seated.

Processor Guide Rails (URM)

Removal and Replacement Procedures

3-45

CAUTION:

beginning these procedures, be sure you are discharged of static electricity by briefly touching a grounded metal object.

Static electricity can damage the electronic components of the workstation. Before

To remove the processor guide rails:

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Remove the graphics board.

4. Remove the speaker.

5. Remove the processor.

6. Unscrew the clay nuts 1 that secure the processor guide rails to the system board using a

T15 torx drive.

7. Remove the guide rails 2.

Figure 3-40. Removing the processor guide rails from the system board

To replace the processor guide rails:

1. Align the clay nuts with the threaded studs protruding through the system board.

2. Tighten the clay nuts using a T15 torx drive.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Speaker

To remove the speaker (158267-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Disconnect the speaker cable from the system board.

4. Remove the four screws that secure the speaker to the side of the drive cage 1, and then

remove the speaker 2.

Figure 3-41. Removing the speaker

To reinstall the speaker, reverse the above procedure.

System Board Fan

To remove the system board fan (158275-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

Removal and Replacement Procedures

3-47

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Unplug the fan from the system board.

4. Remove the four screws that hold the fan to the chassis 1 and lift the fan out of the

unit 2.

5. Remove the four push lock fasteners 3 from the fan assembly.

Figure 3-42. Removing the system board fan

To replace the fan, reverse the above procedure, assuring that the fan will push air over the system board.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Power Supply

To remove the power supply (128399-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

2. Remove the workstation access panel.

3. Disconnect all power cables from the mass storage devices and the system board.

Before removing the workstation access panel, ensure that the workstation is

Removal and Replacement Procedures

4. Remove the four external screws that secure the power supply to the back of the

chassis 1.

NOTE:

The internal screw that secures the power supply to the side of the chassis may not need to be removed, only loosened.

5. Slide the power supply toward the front of the computer, then lift up, and remove it from

the chassis 2.

3-49

Figure 3-43. Removing the power supply

To replace the power supply, reverse the preceding procedure.

WARNING:

reduce the risk of electrical shock, damage to the equipment, or loss of the data, do not disable this feature. The grounding type plug is an important safety feature.

WARNING:

the computer until the computer cover is replaced. Connecting the power before replacing the computer cover can result in personal injury or equipment damage.

CAUTION:

reconnected.

This equipment is designed for connection to a grounded (earthed) outlet. To

Only qualified personnel should perform this procedure. Do not reconnect power to

Damage to the system board could result if the power cables are not properly

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Power Switch

CAUTION:

damage the switch components.

The power switch should not be removed from the switch holder. Doing so may

To remove the power switch and switch holder (166925-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Disconnect the power/LED cable from the system board 1.

4. Push the release tab toward the drive bays 2, and then remove the power switch from the

chassis 3.

Figure 3-44. Disconnecting and removing the power switch and switch holder

To reinstall the power switch, reverse the above procedure, pushing the power switch until it snaps into place.

System Board

Removal and Replacement Procedures

3-51

CAUTION:

beginning these procedures, be sure you are discharged of static electricity by briefly touching a grounded metal object.

Static electricity can damage the electronic components of the workstation. Before

To remove and replace the system board (158272-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. With the workstation in the desktop position, remove the speaker.

4. Remove all expansion boards.

5. Disconnect all cables that are attached to the system board.

6. Remove the processor, processor guide rails, and the RIMMs or SDRAM expansion

boards.

7. Remove the Terminator Board (if installed).

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Compaq Professional Workstation AP550 Maintenance and Service Guide

8. Remove the retaining screws that secure the system board to the chassis 1.

9. Slide the board 1/2-inch toward the front of the chassis to clear the I/O panel

connectors 2.

10. Tilt the rear of the board up 3, then lift the board up and out of the chassis 4.

Figure 3-45. Removing the system board from the chassis

To install a new system board, reverse the above procedure.

CAUTION:

reconnected to the system board.

NOTE:

When installing the system board, properly align the board in the chassis by inserting the screw nearest the power supply first.

Damage to the system board could result if all the power cables are not properly

I/O Panel

Removal and Replacement Procedures

To remove the I/O panel:

1. Perform the steps in the “Service Preparations” section as previously shown.

3-53

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Remove all expansion boards.

4. Remove the speaker.

5. Remove the power supply.

6. Disconnect all cables that are attached to the system board.

7. Remove the system board.

8. Remove the I/O panel from the back of the chassis.

Figure 3-46. Removing the I/O panel

To replace the I/O panel, reverse the above procedure.

CAUTION:

reconnected to the system board.

Damage to the system board could result if all the power cables are not properly

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Lithium Battery

NOTE:

When replacing a battery, use a CR2032 or equivalent 3-volt lithium coin cell battery.

WARNING:

chemical burn if the battery pack is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose of in water or fire, or expose it to temperatures higher than 140ºF (60ºC).

CAUTION:

beginning these procedures, be sure you are discharged of static electricity by briefly touching a grounded metal object.

NOTE:

It is important to make a diagnostics diskette creating and using the Compaq Diagnostic Diskette are located on the Compaq website: www.compaq.com

The system board contains a lithium-ion battery pack. There is a risk of fire and

Static electricity can damage the electronic components of the workstation. Before

before

you install a new battery. Instructions for

To replace the lithium battery (153099-001):

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Locate the battery on the system board.

NOTE:

If you have expansion boards installed, you may need to remove them to gain access to the battery.

Figure 3-47. Locating the battery on the system board

4. Lift the battery out of the holder.

Figure 3-48. Removing the battery

Removal and Replacement Procedures

3-55

To replace the battery, slide the replacement battery into position with the positive side up.

IMPORTANT:

NOTE:

Positive polarity should be positioned up.

The battery holder automatically secures the battery in the proper position.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Converting a Minitower to a Desktop Configuration

To convert a minitower to a desktop configuration:

1. Perform the steps in the “Service Preparations” section as previously shown.

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet.

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Remove the front bezel.

4. Disconnect all power and data cables from the hard drives in the 5.25-inch drive bays.

5. Remove the drives from the 5.25-inch drive bays by lifting the drivelock.

Figure 3-49. Releasing the drives by lifting the drivelock

6. Push the drives from the rear and remove them from the front of the drive bay.

CAUTION:

prevent damage to the drive bezel, push the drives from the rear to remove from the drive bay. The use of unnecessary force may result in damage to the drives.

When removing the drives, do not pull the drives from the front of the drive bay. To

Removal and Replacement Procedures

7. Rotate the drives counterclockwise 90 degrees, then reinstall them into the drive bays.

When the drives are properly inserted, the drivelock will secure them.

3-57

IMPORTANT:

desktop configuration for proper drive clearance and access.

Figure 3-50. Installing a drive in the desktop configuration

The diskette drive should always be placed in the bay nearest the top of the chassis in the

8. Reconnect the power and data cables to the drives.

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Compaq Professional Workstation AP550 Maintenance and Service Guide

Figure 3-51. Rotating the bezel blanks when converting a minitower 1 to a desktop

9. Gently pull the subpanel, with the bezel blank secured, away from the front bezel, remove,

and rotate the bezel blank.

CAUTION:

subpanel away at an angle could damage the pins that align it within the front bezel.

Hold the subpanel straight when you pull it away from the front bezel. Pulling the

10. Replace the subpanel and front bezel, ensuring the subpanel and front bezel align properly

with the alignment tabs.

CAUTION:

blanks are in the proper orientation to prevent damage to the alignment pins. See Figure 3-7 for the subpanel keyed-alignment positions.

When replacing the subpanel, be sure the aligning pins and any remaining bezel

11. Reassemble the workstation.

NOTE:

When switching from minitower to desktop orientation, the bezel blank should be switched out with the replacement provided to ensure that the Compaq logo is properly oriented.

Removal and Replacement Procedures

Converting a Desktop to a Minitower Configuration

To convert a desktop to a minitower configuration:

1. Perform the steps in the “Service Preparations” section as previously shown.

3-59

CAUTION:

turned off, all cables are disconnected from the back of the workstation, and the power cord is disconnected from the grounded AC outlet

Before removing the workstation access panel, ensure that the workstation is

2. Remove the workstation access panel.

3. Remove the front bezel.

4. Disconnect the power and data cables from each drive in the 5.25-inch drive bays.

5. Remove each drive from the 5.25-inch drive bays by pressing the drivelock release button.

Figure 3-52. Releasing the drives with the drivelock release button

6. Push the drives from the rear to remove them from the front of the drive bay.

CAUTION:

the drive bezel, push the drive from the rear to remove from the drive bay. The use of unnecessary force may result in damage to the drive.

When removing a drive, do not pull on the front of the drive. To prevent damage to

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Compaq Professional Workstation AP550 Maintenance and Service Guide

7. Rotate each drive clockwise 90 degrees, then reinstall it into the drive bay. When the drives are properly inserted, the drivelock will secure them.

IMPORTANT:

three, the bay nearest the internal 3.5-inch drives.

Figure 3-53. Installing a drive in the minitower configuration

For proper placement within the chassis, the diskette drive should always be placed in bay

8. Reconnect the power and data cables to each drive.

Removal and Replacement Procedures

9. Gently pull the subpanel, with the bezel blank secured, away from the front bezel and rotate the bezel blank clockwise 90 degrees.

3-61

CAUTION:

subpanel away at an angle could damage the pin alignment.

Hold the subpanel straight when you pull it away from the front bezel. Pulling the

Figure 3-54. Rotating the bezel blanks when converting a desktop 1 to a minitower

10. Replace the subpanel and front bezel, ensuring the subpanel and front bezel align properly with the alignment tabs.

CAUTION:

blanks are in the proper orientation to prevent damage to the alignment pins. See Figure 3-7 for the subpanel keyed-alignment positions.

When replacing the subpanel, be sure the aligning pins and any remaining bezel

11. Reassemble the workstation.

NOTE:

When switching from desktop to minitower orientation, the bezel blank should be switched out

with the replacement provided to ensure that the Compaq logo is properly oriented.

Overview

Chapter

Diagnostic Tools

This chapter provides information on the following topics to assist you when servicing the Compaq Professional Workstation AP550:

■

Power-On Self-Test (POST)

■

Troubleshooting Minor Problems

■

Computer Setup and Diagnostics Utilities

■

Clearing Configuration Memory

■

Diagnostic Utilities

■

Error Codes

■

ROMPaq

■

Fault Management

■

Compaq Insight Manager

■

Compaq Management Agents for Workstations

■

Compaq Restore CD

■

Compaq Diagnostics for Windows NT

IMPORTANT:

proper service.

Adherence to the procedures and precautions described in this chapter is essential for

4-2

Compaq Professional Workstation AP550 Maintenance and Service Guide

Power-On Self-Test (POST)

POST is a series of diagnostic tests that runs automatically when the system is turned on. After the computer is turned on, POST checks the following assemblies to make sure that the computer system is functioning properly:

■

Keyboard

■

RIMMs

■

Graphics controller

■

Diskette drives

■

IDE/CD-ROM drive

■

Hard drives

■

Processor

■

Controllers

POST also detects the type of SCSI mass storage devices that are installed in the workstation.

NOTE:

If the Power-On Password is set, a key icon ( You will need to enter the password before continuing. See Chapter 5 for information on deleting or bypassing the Power-On Password.

) appears on the screen while POST is running.

If POST finds an error in the system, an audible and/or visual message occurs. For explanations of the error codes and a recommended course of action, see Table 4-1.

POST Messages

An error message results if the POST encounters a problem. This test runs when the system is turned on, checking assemblies within the workstation and reporting any errors found.

Diagnostic Tools

4-3

CAUTION:

should be excised whenever removing or replacing these components.

NOTE:

See Chapter 2 for more information on preparing the workstation for service.

RIMMs can reach a temperature of 212°F (100°C) in a matter of minutes. Caution

Table 4-1

POST Error Messages

Audible Beeps

Error Code

101-ROM Error System ROM checksum

101-Option ROM Checksum Error

102-System Board Failure

103-System Board Failure

150-SafePost Active An add-in card in the system

L=Long S=Short Probable Source of Problem Recommended Action

Option ROM checksum Contact your Compaq

DMA, timers, and so forth Contact your Compaq

Hardware component. Replace the Expansion Cage

appeared not to work correctly.

Contact your Compaq authorized service provider

authorized service provider

System Board. Run the Computer Setup utility.

Reboot the system. If add-in card requires an unusual amount of setup time, SafePost can be disabled in Computer Setup. Otherwise, remove the add-in card.

continued

4-4

Compaq Professional Workstation AP550 Maintenance and Service Guide

Table 4-1 POST Error Messages

Error Code

continued

Audible Beeps

L=Long S=Short Probable Source of Problem Recommended Action

162-System Options Error

162-System Options Not Set

163-Time & Date Not Set

2S Configuration incorrect.

No diskette drive or mismatch in drive type.

RTC (real-time clock) battery may need to be replaced. Battery life is approximately 5 years.

CMOS jumper may not be properly installed.

System configuration has changed since last boot.

Invalid time or date in configuration memory.

RTC (real-time clock) battery may need to be replaced. Battery life is approximately 5 years.

CMOS jumper may not be properly installed.

Run Computer Setup or Windows NT utilities.

Run Computer Setup or Windows NT Workstation utilities.

First, reset the date and time under Control Panel. If the problem persists, replace the RTC battery. See Chapter 3,

Removal and Replacement

“

Procedures

Clear the configuration memory.

Press F1 and save changes. If problem persists, replace the CMOS backup battery.

Set the date and time under Control Panel. Run Computer Setup or Windows NT Workstation utilities.

If the problem persists, replace the RTC battery. See Chapter 3,

Removal and Replacement

“

Procedures

Clear the configuration memory.

for instructions.

”

for instructions.

”

164-Memory Size Error

201-Memory Error None RAM failure. Be sure each memory module is

202-Memory Type Mismatch

2S Memory configuration incorrect. Be sure each memory module is

installed properly. Run Computer Setup or Windows NT Workstation utilities.

installed properly.

Replace the RIMMs.

None Invalid memory configuration. Run Computer Setup or

Windows NT utilities.

Replace the RIMMs.

continued

Table 4-1 POST Error Messages

Error Code

Diagnostic Tools

continued

Audible Beeps

L=Long S=Short Probable Source of Problem Recommended Action

4-5

207-ECC Corrected Single Bit Errors in Memory Module Socket(s)

212-Failed Processor 1L Processor has failed to initialize.

213-Incompatible Memory Module in Memory Module Socket(s)

214-Memory Device Failure. Error Code: XX Memory Module Sockets(s): XX

301-Keyboard Error None Keyboard failure. Check to see if a key is stuck.

303-Keyboard Controller Error

None I/O board keyboard controller. Reconnect the keyboard with

A memory error on one of the installed RIMMs has been detected and corrected with the system’s ECC logic. The workstation will continue to operate correctly despite this error.

Memory configuration is not supported by system firmware.

A specific error has occurred in a RDRAM device installed in the identified socket.

Run diagnostics to get more information.

Replace the RIMMs if error persists.

Replace the processor and/or the processor power module.

Remove any newly installed RIMM(s).

Remove the RIMM device.

Reconnect the keyboard with the computer turned off.

Replace the keyboard if necessary.

computer turned off.

Replace the system board.

304-Keyboard or System Unit Error

404-Parallel Port Address Conflict Detected

601-Diskette Controller Error

None Keyboard failure. Reconnect the keyboard with

the computer turned off.

Replace the keyboard.

Replace the system board.

2S Both external and internal ports

are assigned to parallel port X.

None Diskette controller circuitry or

floppy drive circuitry is incorrect.

Run Computer Setup or Windows NT utilities.

Run Computer Setup.

Check and/or replace cables.

Replace the diskette drive.

Replace the system board.

continued

4-6

Compaq Professional Workstation AP550 Maintenance and Service Guide

Table 4-1 POST Error Messages

Error Code

continued

Audible Beeps

L=Long S=Short Probable Source of Problem Recommended Action

605-Diskette Drive Type Error

912-The computer cover has been removed since last system startup

1611-Fan failure detected.

1720-SMART Hard Drive detects imminent failure.

1721-SMART SCSI Hard Drive Detects Imminent Failure

1771-Primary Disk Port Address Assignment Conflict

1772-Secondary Disk Port Address Assignment Conflict

1780-Disk 0 Failure IDE hard drive failure Contact your Compaq

1781-Disk 1 Failure IDE hard drive failure Contact your Compaq

2S Mismatch in drive type.

The machine cover has been removed. Please ensure that any system access was authorized.

Chassis fan not connected to the system board.

IDE hard drive(s). Contact your Compaq

SCSI hard drive(s) Contact your Compaq

IDE configuration Run Computer Setup

Run Computer Setup or Windows NT utilities.

This error is strictly informational and will be reset upon the next cold boot.

Reattach chassis fan to the system board.

authorized service provider.

authorized service provider

1782-Disk Controller Failure

IDE circuitry failure Contact your Compaq

authorized service provider

continued

Compaq Deskpro AP550, AP550 - Professional - 128 MB RAM, Professional Workstation AP550 Maintenance And Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Notice

Contents

About This Guide

Symbols in Text

Compaq Technician Notes

Where to Go for Additional Help

Illustrated Parts Catalog

Overview

Spare Parts List

Overview

Service Preliminaries

Preliminary Warnings and Cautions

Electrostatic Discharge Information

Equipment Symbols

Tools and Software Requirements

Warranty Information

Introduction

Removal and Replacement Procedures

Serial Number

Service Preparations

Cable Lock

Workstation Access Panel

Front Bezel

Subpanel and Bezel Blanks

Mass Storage Devices

Installing Optional SCSI Devices

Drivelock

Expansion Boards

Serial Port Cover Connector

Card Guide

Memory Modules

Processor

Speaker

System Board Fan

Power Supply

Power Switch

System Board

I/O Panel

Lithium Battery

Converting a Minitower to a Desktop Configuration

Converting a Desktop to a Minitower Configuration

Overview

Diagnostic Tools

Power-On Self-Test (POST)

POST Messages