Compaq Armada 3500 series Service Manual

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CONTENTS

preface

USING THIS GUIDE

Symbols............................................................................................................................................. iv

Technician Notes.................................................................................................................................v

Serial Number .....................................................................................................................................v

Laser Safety ....................................................................................................................................v

CDRH Regulations .........................................................................................................................v

Battery Notice............................................................................................................................... vi

Locating Additional Information ..................................................................................................... vii

chapter 1

PRODUCT DESCRIPTION

1.1 Computer Features and Models ............................................................................................... 1-1

1.1.1 Features.............................................................................................................................. 1-2

1.1.2 Models................................................................................................................................ 1-3

1.1.3 Software Fulfillment..........................................................................................................1-3

1.2 Computer Options.................................................................................................................... 1-3

1.2.1 Convenience Base II ..........................................................................................................1-3

1.2.2 System Memory Options ................................................................................................... 1-3

1.2.3 External Battery Charger ................................................................................................... 1-4

1.2.4 External Keyboards and Pointing Devices ........................................................................ 1-4

1.2.5 External Monitors .............................................................................................................. 1-4

1.3 External Computer Components.............................................................................................. 1-5

1.3.1 Left Side Components........................................................................................................ 1-5

1.3.2 Front Components.............................................................................................................. 1-6

1.3.3 Top Components................................................................................................................1-7

1.3.4 Right Side Components ..................................................................................................... 1-8

1.3.5 Rear Components...............................................................................................................1-9

1.3.6 Computer Bottom Components ....................................................................................... 1-10

1.3.7 M35EU Bottom Components .......................................................................................... 1-11

1.3.8 Status Panel Lights........................................................................................................... 1-12

1.4 Design Overview.................................................................................................................... 1-13

1.4.1 System Unit...................................................................................................................... 1-13

1.4.2 Internal Boards.................................................................................................................1-13

1.4.7 Video system.................................................................................................................... 1-14

chapter 2

TROUBLESHOOTING

2.1 Preliminary Steps.....................................................................................................................2-2

2.2 Clearing Passwords.................................................................................................................. 2-3

2.3 Power-On Self-Test (POST)....................................................................................................2-3

2.4 POST Error Messages.............................................................................................................. 2-4

Contents iii

Page 3

2.5 Compaq Utilities......................................................................................................................2-7

2.5.1 Computer Setup ................................................................................................................. 2-7

2.5.2 Computer Checkup (TEST)............................................................................................... 2-9

2.5.3 Running View System Information (INSPECT) ............................................................. 2-16

2.5.4 Running Compaq Diagnostics ......................................................................................... 2-16

2.5.5 Boot Sequencing.............................................................................................................. 2-16

2.5.6 Factory Default Settings .................................................................................................. 2-17

2.6 Troubleshooting Without Diagnostics...................................................................................2-18

2.6.1 Before Replacing Parts .................................................................................................... 2-18

chapter 3

ILLUSTRATED PARTS CATALOG

3.1 System Unit.............................................................................................................................. 3-2

3.2 Mass Storage Devices.............................................................................................................. 3-4

3.3 Cables and Power Cords..........................................................................................................3-5

3.4 Standard and Optional Boards ................................................................................................. 3-6

3.5 Options..................................................................................................................................... 3-7

3.6 Miscellaneous Parts ................................................................................................................. 3-8

3.7 Documentation....................................................................................................................... 3-10

chapter 4

REMOVAL AND REPLACEMENT PRELIMINARIES

4.1 Tools Required......................................................................................................................... 4-1

4.2 Service Considerations............................................................................................................. 4-1

4.2.1 Plastic Parts........................................................................................................................4-1

4.2.2 Cables and Connectors....................................................................................................... 4-2

4.3 Preventing Damage to Removable Drives............................................................................... 4-2

4.4 Preventing Electrostatic Damage............................................................................................. 4-3

4.4.1 Packaging and Transporting Precautions........................................................................... 4-3

4.4.2 Workstation Precautions.................................................................................................... 4-4

4.4.3 Grounding Equipment and Methods..................................................................................4-5

4.4.4 Electrostatic Voltage Levels and Protective Materials...................................................... 4-6

iv Contents

chapter 5

REMOVAL AND REPLACEMENT PROCEDURES

5.1 Serial Number...........................................................................................................................5-1

5.2 Disassembly Sequence.............................................................................................................. 5-2

5.3 Preparing the Computer for Disassembly................................................................................ 5-3

5.3.1 Disconnecting the AC Power............................................................................................. 5-3

5.3.2 Removing the PCMCIA Card............................................................................................5-6

5.3.3 Removing the Battery Pack ............................................................................................... 5-7

5.4 Memory Board.......................................................................................................................... 5-8

5.4.1 Removing the Memory Module......................................................................................... 5-9

5.4.2 Installing the Memory Module ........................................................................................ 5-10

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5.5 Hard Drive............................................................................................................................... 5-11

5.5.1 Removing the Hard Drive Cover.....................................................................................5-11

5.5.2 Removing the Nickel Cadmium Auxiliary Battery ......................................................... 5-12

5.5.3 Removing the Lithium Real Time Clock Battery............................................................ 5-13

5.5.4 Removing the Hard Drive................................................................................................5-14

5.6 Keyboard................................................................................................................................. 5-15

5.7 Display Assembly ...................................................................................................................5-17

5.7.1 Removing the Display Hinge Covers .............................................................................. 5-17

5.7.2 Removing the Switch Cover/Status Panel ....................................................................... 5-18

5.7.3 Removing the Display Assembly ....................................................................................5-20

5.8 Top Cover Assembly...............................................................................................................5-22

5.8.1 Removing the DC-DC Converter..................................................................................... 5-24

5.8.2 Removing the System Board ........................................................................................... 5-25

5.8.3 Removing the Fan............................................................................................................ 5-26

5.9 Removing a MultiBay Device................................................................................................. 5-27

chapter 6

SPECIFICATIONS

6.1 Computer..................................................................................................................................6-2

6.2 Display .....................................................................................................................................6-3

6.3 Hard Drives............................................................................................................................... 6-4

6.4 Diskette Drive ...........................................................................................................................6-5

6.5 Optical Disc Drives................................................................................................................... 6-6

6.6 System Interrupts ...................................................................................................................... 6-8

6.7 System DMA............................................................................................................................. 6-8

6.8 System I/O Address ..................................................................................................................6-9

6.9 System Memory Map..............................................................................................................6-11

appendix A

CONNECTORS ......................................................................................................................................... A-1

Appendix B

POWER CORD SET REQUIREMENTS

B.1 3-Conductor Power Cord Set....................................................................................................B-1

B.1.1 General Requirements.......................................................................................................B-1

B.1.2 Country-Specific Requirements........................................................................................B-2

B.1.3 Notes: ................................................................................................................................B-2

Appendix C

CONVENIENCE BASES

C.1 Models and Features................................................................................................................C-1

C.2 Convenience Base Features.....................................................................................................C-2

C.3 Convenience Base II Components ..........................................................................................C-3

C.3.1 Front and Right Side Components ....................................................................................C-3

C.3.2 Rear Components..............................................................................................................C-4

INDEX .....................................................................................................................................................I-1

Contents v

Page 5

vi Contents

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chapte

PRODUCT DESCRIPTION

1.1 Computer Features and Models

The Armada 3500 Family of Personal Computers is a line of thin and lightweight notebook computers with superior flexibility and the latest performance features. It is designed for highly mobile professionals who spend a majority of their time traveling.

Figure 1-1. Armada 3500 Personal Computer with Mobile 3500 Expansion Unit

Product Description 1-1

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This full-function, Mobile Pentium II-based family of notebook computers allows full desktop functionality. It also provides connectivity through the use of an optional Mobile 3500 Expansion Unit (M35EU) and a Convenience Base.

1.1.1 Features

The computer models have the following standard features:

■ 266- or 300-MHz Mobile Pentium II processors

■ 32- or 64-MB of synchronous dynamic random access memory (SDRAM) on the

system board, expandable to a maximum of 160 MB

■ 4.0- or 6.0-GB, 2.5-inch internal hard drive mounted in carrier

■ LCD displays:

❏ 12.1 inch SVGA CTFT display ❏ 13.3-inch XGA CTFT display

■ Supports Lithium Ion (Li-Ion) battery pack

❏ Li-Ion Battery Pack (6 cell) ❏ Extended Life Li-Ion Battery Pack (9 cell)

■ Internal speaker

■ Internal microphone

■ External 1.44-MB diskette drive

■ Full-size 101 key compatible keyboard including 12 function keys, 8 cursor control

keys, inverted-T cursor control keys, and embedded numeric keypad

■ Four user-programmable keys

■ Multifunctional EasyPoint IV pointing device

■ Operates from a battery pack in the battery bay, an external AC power supply that is

compatible with domestic or international power sources, or from an AC power supply integrated in the Mobile 3500 Expansion Unit

■ Power management and security features

■ Infrared interface for wireless communication with other IrDA-compliant devices at

data rates up to 4 mb/sec

■ Universal Serial Bus (USB)

■ Two standard device slots that will accommodate two Type II or one Type III PC

)

Card, PCMCIA card or CardBus card. Zoomed-Video in the bottom slot

■ When connected to the Mobile 3500 Expansion Unit, a 176-pin expansion connector

provides the interface to the convenience base options. Mobile 3500 Expansion Unit is required for use with convenience base.

■ Rear-panel ports provide connections for parallel, serial, external monitor,

microphone/Line-In jack, speaker/headphone (Line-Out jack), and keyboard/mouse

Will support up to a maximum of 192-MB with 64-MB on the system board.

Windows 95 supports up to 115-kb/sec. Driver for 4 mb/sec available from www.microsoft.com.

1-2 Product Description

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1.1.2 Models

Compaq Armada 3500 computers are configurable, and may contain any or all of the features listed. All models have 32- or 64-MB of standard memory, and may be upgraded to a maximum of 192-MB with 64-MB on the system board.

1.1.3 Software Fulfillment

Replacement software may be ordered directly from Compaq Computer Corporation. Both the model and the serial number of the computer are needed to identify the specific software available.

1.2 Computer Options

The computer supports the following options:

■ Memory expansion boards

■ Li-ion battery pack

■ External battery charger with AC adapter

■ Hard drive upgrade

■ Mobile 3500 Expansion Unit (M35EU)

❏ CD-ROM or DVD-ROM drive for optical disc bay ❏ 6-GB hard drive for MultiBay (requires carrier) ❏ 120-MB LS-120 super drive for MultiBay ❏ 100-MB Zip drive for MultiBay

1.2.1 Convenience Base II

Armada 3500 models support the following convenience base models when attached to the M35EU:

■ Convenience Base II pass through

■ Convenience Base II with Ethernet

In addition, the computer is compatible with the convenience bases from the Armada 1500 Family of Personal Computers.

1.2.2 System Memory Options

The computer supports optional 16-, 32-, 64-, and 128-MB memory boards. The memory boards are 66-MHz SDRAM without parity. System memory can be expanded to up to 192-MB, depending on the model.

Product Description 1-3

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1.2.3 External Battery Charger

The external battery charger has the following features:

■ Accepts Armada 3500 battery pack

■ Charges two sizes of battery packs

❏ 6-cell battery pack in 1.5 hours ❏ 9-cell battery pack in 2.0 hours

1.2.4 External Keyboards and Pointing Devices

Supports Compaq or Compaq compatible PS/2 keyboards and pointing devices. Supports industry standard “Y” connector.

1.2.5 External Monitors

■ Supports all VGA Monitors at resolutions up to 1280 × 1024

■ Supports DDC1 and DDC2b compliant Energy Star monitors

1-4 Product Description

Page 10

1.3 External Computer Components

The external computer components are illustrated and described in this section.

1.3.1 Left Side Components

The left side external components are shown in Figure 1-2 and are described in Table 1-1.

Figure 1-2. Left Side Components

Table 1-1

Left Side Components

Item Component Function

1 Cable Lock Secures computer to fixed object 2 Air exhaust vent Provides warm air exit 3 USB port Connects USB devices 4 External diskette port Connects diskette drive 5 Volume up Increases volume 6 Volume down Decreases volume 7 Air inlet vent Provides cool air inlet 8 Battery Powers computer

Product Description 1-5

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1.3.2 Front Components

The front external components are shown in Figure 1-3 and are described in Table 1-2.

Figure 1-3. Front Components

Item Component Function

1 Display LCD graphic display 2 Lid latches Secures lid for transport 3 Lid switch Turns display off when lid is closed 4 M35EU slots Secures computer to Mobile 3500 Expansion Unit 5 Hard disk activity LED Indicates hard disk activity - blinks while in standby 6 Power/Standby LED Indicates that the computer is on 7 Battery Powers the computer

1-6 Product Description

Table 1-2

Front Components

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1.3.3 Top Components

The top external components are shown in Figure 1-4 and are described in Table 1-3.

Figure 1-4. Top Components

Table 1-3

Top Components

Item Component Function

1 Programmable function buttons User-programmable keys 2 Suspend button Initiates suspend 3 Power switch Turns power on and off 4 Microphone Input for audio recording 5 Lid switch Turns display off when lid is closed 6 Keyboard release latches Releases keyboard from system unit 7 EasyPoint IV Pointing device 8 Click buttons Pointing device click buttons

Product Description 1-7

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1.3.4 Right Side Components

The right side external components are shown in Figure 1-5 and are described in Table 1-4.

Figure 1-5. Right Side Components

Item Component Function

1 Speaker Produces monaural audio when not docked to M35EU 2 PC Card slots Accepts 16- and 32-bit PC Cards 3 DC Connector DC input from external AC adapter

1-8 Product Description

Table 1-4

Right Side Components

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1.3.5 Rear Components

The rear components are shown Figure 1-6 and are described in Table 1-5.

Figure 1-6. Rear Components

Table 1-5

Rear Components

Item Component Function

1 External keyboard port Connects external keyboard or PS2 mouse

2 Infrared port Provides wireless communications 3 Parallel connector Connects parallel devices such as a printer 4 Serial connector Connects serial devices such as a mouse 5 Docking connector Provides connection to optional convenience base 6 External monitor connector Connects external monitor 7 Mic in connector Connects external microphone 8 Headphone connector Connects stereo speakers or headphones

(Supports standard “Y” connector)

Product Description 1-9

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1.3.6 Computer Bottom Components

The bottom external components are shown in Figure 1-7 and are described in Table 1-6.

Figure 1-7. Bottom Components

Table 1-6

Bottom Components

Item Component Function

1 M35EU slots Aligns system with M35EU 2 M35EU connector cover Covers M35EU connector 3 M35EU connector Connects system to M35EU 4 Memory cover Covers memory expansion slot 5 Hard drive cover Covers hard drive

1-10 Product Description

Page 16

1.3.7 M35EU Bottom Components

The bottom external components are shown in Figure 1-7 and are described in Table 1-6.

Figure 1-8. Bottom Components With M35EU

Table 1-7

Bottom Components With M35EU

Item Component Function

1 Subwoofer Enhances sound reproduction 2 Locking tabs Secures computer /M35EU to Convenience Base II 3 Docking guide Aligns computer /M35EU to Convenience Base II when docking 4 Speakers Produces high-quality sound 5 Optical bay retainer cover Provides access to Optical Disc Bay connector and retainer

Product Description 1-11

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1.3.8 Status Panel Lights

The status panel lights are shown in Figure 1-9 and described in Table 1-8.

Figure 1-9. Status Panel Lights

Item Component Function

1 Hard drive activity light Indicates hard drive or CD-ROM access 2 Diskette drive activity light Indicates diskette drive activity 3 Number lock indicator Indicates that numbers lock is on 4 Caps lock indicator Indicates that caps lock is on 5 Scroll lock indicator Indicates that scroll lock is on

1-12 Product Description

Table 1-8

Status Panel

Page 18

1.4 Design Overview

This section presents a design overview of the computer. The overview is limited to field replaceable parts. All replacement parts are listed in Chapter 3.

1.4.1 System Unit

The computer is a traditional clamshell design with a display assembly attached to a system unit. The computer opens to reveal a backlit LCD display and a full-function keyboard. The display is designed for a continuously adjustable tilt angle. Multimedia capability and connectivity are enhanced through an optional Mobile 3500 Expansion Unit.

1.4.2 System Boards

The system electronics are integrated on three printed circuit assemblies: the system board, the DC-DC converter board, and LED/switch board.

■ The system board integrates the processor, on-board memory, level 2 cache, local

bus video adapter, audio functions, and PCMCIA/CardBus adapter.

■ The DC-DC converter board creates the system voltages (3.3v and 5v) from the

battery or AC/DC input.

■ The LED/switch board integrates the status LEDs and the power and standby

switches.

1.4.2.1 Processor

An Intel 266- or 300-MHz Mobile Pentium II processor is located on the system board.

1.4.2.2 Memory

Base memory is 32- or 64-MB with 16-, 32-, 64-, or 128-MB of optional expansion memory. Base memory is onboard memory built into the system board. Expansion memory consists of one memory expansion board available as a user installable option.

1.4.2.3 Cache

Level 2 cache is integrated in the CPU module. It is not user upgradable.

1.4.2.4 PCMCIA/CardBus Controller

The PCMCIA/CardBus adapter is based on the Texas Instrument PCI1220 PC to CardBus controller unit. Both 16-bit cards and 32-bit CardBus cards are supported.

1.4.2.5 Video Adapter Controller

The local bus video adapter is the Chips and Technologies 69000 controller. This controller offers improved video performance due to the on-board 2-MB video memory.

Product Description 1-13

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1.4.3 Video system

The standard video subsystem consists of:

■ One of the following LCD displays: ❏ 12.1-in SVGA CTFT display

❏ 13.3-in XGA CTFT display

■ A 2-Megabyte frame buffer integral with the video controller integrated circuit

■ An inverter to supply AC power to the LCD back-light system

■ A standard external VGA connector for use with CRTs and other VGA compatible

displays

■ A 40-KB Video ROM

1-14 Product Description

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chapte

TROUBLESHOOTING

Follow these basic steps when beginning the troubleshooting process:

1. Complete the preliminary steps listed in Section 2.1.

2. Run the Power-On Self-Test (POST) as described in Section 2.3.

3. Run Computer Setup as described in Section 2.5.

4. Run the Computer Checkup (TEST) as described in Section 2.6.

5. If you are unable to run POST or Computer Checkup or if the problem persists after running POST and Computer Checkup, perform the recommended actions described in the diagnostic tables in Section 2.5.

6. Remove non-Compaq devices and components prior to troubleshooting.

Follow these guidelines when troubleshooting:

■ Complete the recommended actions in the order in which they are given.

■ Repeat POST and Computer Checkup after each recommended action until the

problem is resolved and the error message does not return.

■ When the problem is resolved, stop performing the troubleshooting steps and do not

complete the remaining recommended actions.

■ Refer to Chapter 5 for removal and replacement procedures that are recommended.

■ If the problem is intermittent, check the computer several times to verify that the

problem is solved.

The following table describes the troubleshooting actions:

If You Want To: Then Run:

Check for POST error messages POST Check that computer components are recognized and

running properly View information about the computer and installed or

connected devices

Perform any of the following:

■ Check the system configuration

■ Set the system power management parameters

■ Return the system to its original configuration

■ Check system configuration of installed devices

Computer Checkup (TEST) under Compaq Utilities

View System Information (INSPECT) under Compaq Utilities

Computer Setup

Troubleshooting 2-1

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2.1 Preliminary Steps

IMPORTANT: Use AC power when running POST, Computer Setup, or Computer

Checkup. A low battery condition could initiate Hibernation and interrupt the test. Before running POST and Computer Checkup, complete the following steps:

1. Obtain established passwords. If you must clear the passwords, go to Section 2.2.

2. Ensure that the battery pack is installed in the computer and the power cord is connected to the computer and plugged into an AC power source.

3. Turn on the computer.

4. If a power-on password has been established, type the password and press Enter.

5. Run Computer Setup (Section 2.5). If a Setup password has been established, type the password and press Enter.

6. Turn off the computer and all external devices.

7. Disconnect external devices that you do not want to test. If you want to use the printer to log error messages, leave it connected to the computer.

NOTE: If a problem only occurs when an external device is connected to the computer, the problem could be with the external device or its cable. Isolate the problem by running POST with and without the external device connected.

9. Use Compaq Utilities and loopback plugs in the serial and parallel connectors if you plan to test these ports.

Follow these steps to run Compaq Utilities:

a. If you are running Compaq Utilities from the hard drive, turn on or restart the

computer. Press F10 when the cursor appears in the upper right corner of the screen. If you do not press F10 in time, restart the computer and try again.

If you are running Compaq Utilities from diskette, insert the Compaq Utilities diskette in drive A. Turn on or restart the computer.

b. Press Enter to accept OK. c. Select Computer Checkup (TEST). d. Select Prompted Diagnostics. e. After “Identifying System Hardware” completes, select Interactive Testing and

follow the instructions on the screen.

2-2 Troubleshooting

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2.2 Clearing Passwords

The power-on password prevents use of the computer until the password is entered. The setup password prevents unauthorized changes to Computer Setup. To clear unknown passwords, you must remove all power from the system board. If you do not know the passwords, use the following procedure to clear the password:

1. Remove the battery pack from the battery bay.

2. Disconnect the AC power.

3. Remove the real-time clock battery (Refer to Chapter 5, “Removing the Lithium

Real Time Clock Battery.”)

4. Remove the auxiliary battery (Refer to Chapter 5, “Removing the Nickel Cadmium

Standby Battery.”)

5. Wait five minutes.

6. Reconnect the AC power.

7. Restart the computer. During Power-On Self Test (POST), a “162 System Options

not set” message appears.

8. Turn off the computer, then disconnect AC power again.

9. Replace the real-time clock battery.

10. Replace the auxiliary battery.

11. Install the battery pack.

12. Proceed with the troubleshooting procedures.

Note: Fn + F11 clears the ESCD configuration information. If the Fn + F11 sequence is

pressed very early after powering the machine on (after you see the keyboard LEDs blink, but before the video is initialized), CMOS memory will be invalidated. The ESCD is cleared, the machine is reset and boots with the “162 - System Options Not Set” message. This is a way to clear out configuration information, such as Windows 95’s knowledge about a docking station. It may help clear up problems if the configuration information had been corrupted. Timing of this keystroke sequence is critical, as there is a very narrow window during which the keys will be recognized. These keys are not documented to users.

2.3 Power-On Self-Test (POST)

The Power-On Self-Test (POST) is a series of tests that run every time the computer is turned on. POST verifies that the system is configured and functioning properly.

To run POST, complete the following steps:

1. Complete the preliminary steps (Section 2.1).

2. Turn on the computer. If POST does not detect any errors, the computer beeps once or twice to indicate that

POST has run successfully. The computer boots from the hard drive or from a bootable diskette if one is installed in the diskette drive.

Troubleshooting 2-3

Page 23

2.4 POST Error Messages

If the system is not functioning well enough to run POST, or if the display is not functioning well enough to show POST error messages, refer to the Troubleshooting tables in Section 2.6.

If POST detects an error, one of the following events occurs:

■ A message with the prefix “WARNING” appears informing you where the error

occurred. The system pauses until you press F1 to continue.

■ A message with the prefix “FATAL” appears informing you where the error

occurred. After the message, the system emits a series of beeps and stops.

■ The system emits a series of beeps and stops.

Warning messages indicate that a potential problem, such as a system configuration error, exists. When F1 is pressed, the system should resume. You should be able to correct problems that produce WARNING messages.

IMPORTANT: When a WARNING message includes the prompt to “RUN SCU,” press F10 to run Computer Setup. (Computer Setup replaces the SCU utility.)

2-4 Troubleshooting

Page 24

If you receive one of the error messages listed below, follow the recommended action.

Table 2-1

Warning Messages

Message Description Recommended Action

CMOS checksum invalid, run SCU CMOS RAM information has

CMOS failure, run SCU CMOS RAM has lost power. Run Computer Setup to reinitialize

Diskette controller error The diskette drive controller

Diskette track 0 failed The diskette drive cannot read

Hard disk controller error The hard drive controller failed

Keyboard controller failure The keyboard failed the self-

Keyboard failure The keyboard failed to respond

No interrupts from Timer 0 The periodic timer interrupt is

ROM at xxxx (LENGTH yyyy) with nonzero checksum (zz)

Time/Date corrupt - run SCU The time and date stored in the

Hard disk xx failure (or error) A failure or an error occurred

Unsupported memory module An EDO memory module was

been corrupted.

failed to respond to the recalibrate command.

track 0 of the diskette in the drive.

to respond to the reset command.

test command.

to the RESET ID command.

not occurring. An illegal adapter ROM was

located at the specified address.

real time clock have been corrupted, possibly by a power loss.

when trying to access the hard drive.

installed in the memory expansion slot.

Run Computer Setup to reinitialize CMOS-RAM.

CMOS-RAM. If there is no diskette drive in the

system, run Computer Setup to properly configure the CMOS-RAM to show no diskette drive present. If the problem persists, or if a diskette drive is present, complete these steps until the problems is solved:

1. Check diskette drive connections.

2. Replace diskette drive.

3. Replace system board. Try another diskette. If the problem

persists, you may need to replace the diskette drive.

Check the drive parameters. Turn off the system and check all related connections.

Replace the system board.

Replace the keyboard. If the problem persists, replace the system board.

Replace the system board.

Check the external adapter (such as a video card) to determine if it is causing the conflict.

1. Run Computer Setup.

2. If problem persists, replace RTC battery.

3. If problems persists, replace system board.

1. Run Scan disk.

2. Check disk in DOS and Windows 95. If problem persists, refer to Table 2-10.

Remove the EDO memory module and replace with SDRAM memory module.

Fatal errors emit a beep and may display a FATAL message. Fatal errors indicate severe problems, such as a hardware failure. Fatal errors do not allow the system to resume. Some of the Fatal error beep codes are listed at the end of this section.

Table 2-2

Fatal Error Message

Message Description Beep Code

Troubleshooting 2-5

Page 25

CMOS RAM test failed A walking bit test of CMOS RAM location 0E

(Hex) - 3F (Hex) failed.

DMA controller faulty A sequential read/write of the transfer count

and transfer address registers within the primary and secondary DMA controllers failed.

Faulty DMA page registers A walking bit read/write of the 16 DMA

controller page registers starting at location 80 Hex failed.

Faulty refresh circuits A continuous read/write test of port 61h found

that bit 4 (Refresh Detect) failed to toggle within an allotted amount of time.

Interrupt controller failed A sequential read/write of various Interrupt

Controller registers failed.

ROM checksum incorrect A checksum of the ROM BIOS does not match

the byte value at F000:FFFF.

RAM error at location xxxx RAM error occurred during memory test. None

Table 2-3

Fatal Error Beep Codes

Beep Code Beep Sequence Description Recommended Action

0 S-S-S-P-S-S-L-P The DMA page registers are

faulty. 1 S-S-S-P-S-L-S-P The refresh circuitry is faulty. 2 S-S-S-P-S-L-L-P The ROM checksum is incorrect. 3 S-S-S-P-L-S-S-P The CMOS RAM test failed. 4 S-S-S-P-L-S-L-P The DMA controller is faulty. 5 S-S-S-P-L-L-S-P The interrupt controller failed. 6 S-S-S-P-L-L-L-P The keyboard controller failed. 7 S-S-L-P-S-S-S-P Graphics adapter is faulty. 8 S-S-L-P-S-S-L-P Internal RAM is faulty. Replace memory board or

S = Short, L = Long, P = Pause

Replace system board.

system board if memory on system board is faulty.

2.5 Compaq Utilities

Compaq Utilities contain several functions that

■ Determine if various computer devices are recognized by the system and are

operating properly.

■ Provide information about the system once it is configured.

Compaq Utilities include the following programs:

■ Computer Setup

■ Computer Checkup (TEST)

■ View System Information (INSPECT)

2-6 Troubleshooting

Page 26

To access Compaq Utilities:

1. Turn on or restart the computer by clicking Start ⇒ Shut Down ⇒ Restart the

computer.

2. Press F10 when the blinking cursor appears in the upper-right corner of the display.

3. Select a menu option.

2.5.1 Computer Setup

Computer Setup contains utilities that give you an overall picture of the computer hardware configuration and aid in troubleshooting. These utilities also allow you to set custom features such as security options, power conservation levels, and startup preferences.

If you are running Windows 95, the computer automatically recognizes and configures the system for new devices. If you have a configuration problem or want to view or reset configuration settings, you can use Computer Setup.

NOTE: In Windows 95, you should use Computer Setup only to adjust system features

such as the power-on password or battery conservation level. Windows 95 may override other configuration changes.

In Windows NT, the computer does not automatically recognize new devices added to the system. All devices ordered with your system have been configured for you. Use Computer Setup to view settings for a new device you have added or to reset configuration settings for preinstalled devices.

Computer Setup provides two methods of viewing the computer configuration: by type (factory setting) or connection.

Troubleshooting 2-7

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Categories by type:

■ System Features—security, power, boot management

■ Communication—port, modem, and other communication devices

■ Storage—storage-related devices such as hard drive, CD-ROM drive, diskette drive

■ Input Devices—keyboard, mouse, and other input devices

■ Network—network adapter or other network-related devices

■ Audio—sound properties and audio device settings

■ Video—display timeouts and video device resources

■ Other—miscellaneous devices

Categories by connection:

■ System Features—security, power, boot management

■ System Devices—keyboard, mouse, parallel and serial ports

■ ISA—ISA bus and connected devices

■ PCI—PCI bus and connected devices

■ PC Card—PC Card devices

2.5.1.1 Running Computer Setup

1. Turn on or restart the computer by clicking Start ⇒ Shut Down ⇒ Restart the

computer.

2. Press F10 when the blinking cursor appears in the upper-right corner of the screen.

NOTE: If you a setup password is enabled, it must be used to access Computer Setup.

3. Click a language and press Enter.

4. Click Computer Setup and press Enter.

5. When you are finished, click Exit.

2-8 Troubleshooting

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2.5.1.2 Exiting Computer Setup

1. Click Exit.

2. Select one of the following Exit options:

■ Save—Saves the new settings and exits Computer Setup.

NOTE: Some settings may not take effect until the computer is restarted.

■ Ignore—Exits Computer Setup and restores previous settings.

■ Cancel—Returns to Computer Setup.

2.5.2 Computer Checkup (TEST)

Computer Checkup (TEST) determines whether the various computer components and devices are recognized by the computer and are functioning properly. You can display, print, or save the information that Computer Checkup generates.

NOTE: Compaq Utilities are intended for testing only Compaq-supplied components. Testing of non-Compaq components may be inconclusive.

2.5.2.1 Running Computer Checkup (TEST)

1. Plug the computer into an external power source. A low battery condition can interrupt the program.

2. Connect a printer if you want to print a log of error messages.

3. Turn on the external devices that you want to test.

4. Turn on or restart the computer.

5. Access Compaq Utilities by pressing F10 when the blinking cursor appears in the upper-right corner of the display.

6. Click Computer Checkup ⇒ View the Device List.

■ If the list of installed devices is correct, click OK.

■ If the list is incorrect, ensure that any new devices are installed properly.

7. Select one of the following from the Test Option menu:

■ Quick Check Diagnostics

■ Automatic Diagnostics

■ Prompted Diagnostics

8. Follow the instructions on the screen as the devices are tested.

9. Click Exit Diagnostics ⇒ Exit from this utility.

Troubleshooting 2-9

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2.5.2.2 Computer Checkup (TEST) Error Codes

Computer Checkup (TEST) error codes occur if the system recognizes a problem while running Computer Checkup. These error codes help identify possible defective assemblies. Table 2-4 through Table 2-14 list Computer Checkup error codes, a description of the error condition, and the recommended action for resolving the condition. For removal and replacement procedures, refer to Chapter 5.

IMPORTANT: Run Computer Checkup each time you complete a recommended action step. If the problem is resolved when POST and Computer Checkup are rerun (i.e., with no error codes), do not perform the remaining recommended action steps.

NOTE: The error codes in the following tables are listed in an “AYE-XX” format, where:

A or AA = Number that represents the faulty assembly

YY = Test or action that failed XX = Specific problem

Table 2-4

Processor Test Error Code

Error Code Description Recommended Action

101-xx CPU test failed. Replace the processor board and retest. 103-xx DMA page registers test failed. Replace the system board and retest. 104-xx Interrupt controller master test failed. 105-xx Port 61 error. 106-xx Keyboard controller self-test failed. 107-xx CMOS RAM test failed. 108-xx CMOS interrupt test failed.

109-xx CMOS clock test failed. 110-xx Programmable timer load data test failed.

113-xx Protected mode test failed.

2-10 Troubleshooting

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Table 2-5

Memory Test Error Codes

Error Code Description Recommended Action

200-xx Memory machine ID test failed. The following steps apply to error codes 200-xx 202-xx Memory system CMOS checksum failed. 203-xx Write/Read test failed. The following applies to error codes 203-xx 204-xx Address test failed. Remove and replace the SODIMM memory board

211-xx Random pattern test failed. 214-xx Noise test failed.

215-xx Random address test failed.

and 202-xx:

1. Flush the system CMOS and retest. See note.

2. Replace the system board and retest. through 215-xx: or system board (if the memory on the system

board is faulty) and retest.

Table 2-6

Keyboard Test Error Codes

Error Code Description Recommended Action

300-xx Failed ID Test. 301-xx Failed Self test/Interface Test. 302-xx Failed Individual Key Test.

1. Reseat the keyboard connector.

2. Replace the keyboard and retest.

3. Replace the system board and retest.

304-xx Failed Keyboard Repeat Test.

Table 2-7

Parallel Printer Test Error Code

Error Code Description Recommended Action

401-xx Printer failed or not connected. 402-xx Failed Port Test. 403-xx Printer pattern test failed.

1. Connect the printer.

2. Check power to the printer.

3. Install bi-directional printer cable and retest.

4. Install the loopback connector and retest.

5. Check port and IRQ configuration.

6. Replace the system board and retest.

Troubleshooting 2-11

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Table 2-8

Diskette Drive Error Code

Error Code Description Recommended Action

600-xx Diskette ID drive types test

failed. 601-xx Diskette format failed. 1. Replace the diskette. 602-xx Diskette read test failed. 2. Replace the diskette drive and retest. 603-xx Diskette write, read, compare test failed. 3. Replace the system board and retest. 604-xx Diskette random read test failed.

605-xx Diskette ID media test failed. 606-xx Diskette speed test failed. 609-xx Diskette reset controller test failed. 610-xx Diskette change line test failed. 697-xx Diskette type error. 698-xx Diskette drive speed not within limits. 699-xx Diskette drive/media ID error. 1. Replace media.

The following steps apply to error codes 600-xx through 698-xx:

2. Run Compaq Utilities.

Table 2-9

Serial Test Error Codes

Error Code Description Recommended Action

1101-xx Serial port test failed. 1. Check port configuration.

2. Replace the system board and retest.

2-12 Troubleshooting

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Table 2-10

Hard Drive Test Error Code

Error Code Description Recommended Action

1701-xx Hard drive format test failed. 1702-xx Hard drive read test failed.

1703-xx Hard drive write/read/compare test failed. 3. Replace the hard drive and retest. 1704-xx Hard drive random seek test failed. 4. Replace the system board and retest. 1705-xx Hard drive controller test failed. 1706-xx Hard drive ready test failed. 1707-xx Hard drive recalibration test failed. 1708-xx Hard drive format bad track test failed. 1709-xx Hard drive reset controller test failed. 1710-xx Hard drive park head test failed. 1715-xx Hard drive head select test failed. 1716-xx Hard drive conditional format test failed. 1717-xx Hard drive ECC* test failed. 1719-xx Hard drive power mode test failed. 1724-xx Network preparation test failed. 1736-xx Drive monitoring test failed.

* ECC = Error Correction Code

1. Run Compaq Utilities and verify drive type.

2. Verify that all secondary drives have secondary drive capability.

Troubleshooting 2-13

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Table 2-11

Video Test Error Codes

Error Code Description Recommended Action

501-xx Video controller test failed. The following actions apply to error codes 501-xx

502-xx Video memory test failed. 1. Disconnect external monitor and test with

503-xx Video attribute test failed. 2. Replace the display assembly and retest. 504-xx Video character set test failed. 3. Replace the system board and retest. 505-xx Video 80 × 25 mode 9 × 14 character

cell test failed.

506-xx Video 80 × 25 mode 8 × 8 character

cell test failed. 507-xx Video 40 × 25 mode test failed. 511-xx Video screen memory page test failed. 512-xx Video gray scale test failed. 514-xx Video white screen test failed. 516-xx Video noise pattern test failed. 2402-xx Video memory test failed. The following actions apply to error codes

2403-xx Video attribute test failed. 1. Run Compaq Utilities. 2404-xx Video character set test failed. 2. Disconnect external monitor and test with

2405-xx Video 80 × 25 mode 9 × 14 character cell

test failed. 2406-xx Video 80 × 25 mode 8 × 8 character cell

test failed. 2411-xx Video screen memory page test failed. 2412-xx Video gray scale test failed. 2414-xx Video white screen test failed. 2416-xx Video noise pattern test failed. 2418-xx ECG/VGC memory test failed. 2419-xx ECG/VGC ROM checksum test failed.

2421-xx ECG/VGC 640 × 200 graphics mode test

failed. 2422-xx ECG/VGC 640 × 350 16 color set test

failed. 2423-xx ECG/VGC 640 × 350 64 color set test

failed. 2424-xx ECG/VGC monochrome text mode test

failed. 2425-xx ECG/VGC monochrome graphics mode test

failed.

through 516-xx:

internal LCD display.

2402-xx through 2456-xx:

internal LCD display.

3. Replace the display assembly and retest.

4. Replace the system board and retest.

Continued

2-14 Troubleshooting

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Table 2-11 Video Test Error Codes

Continued

Error Code Description Recommended Action

2431-xx 640 × 480 graphics test failed. 2448-xx Advanced VGA Controller test failed. 2451-xx 132-column Advanced VGA test failed. 2456-xx Advanced VGA 256 Color test failed. 2458-xx Advanced VGA Bit BLT test failed. The following action applies to error codes 2458-

2468-xx Advanced VGA DAC test failed. Replace the system board and retest. 2477-xx Advanced VGA data path test failed.

2478-xx Advanced VGA BitBLT test failed. 2480-xx Advanced VGA Linedraw test failed.

Refer to Table 2-25 for information about other video errors.

xx to 2480-xx:

Table 2-12

Audio Test Error Codes

Error Code Description Recommended Action

114-01 Speaker test failed.

3206-xx Audio System Internal Error. Replace the system board and retest.

1. Check system configuration.

2. Check speaker cable connection to system board

3. Replace speaker.

Table 2-13

Pointing Device Interface Test Error Code

Error Code Description Recommended Action

8601-xx Pointing device test failed. 8602-xx Interface test failed.

Replace the keyboard.

Table 2-14

CD-ROM Test Error Codes

Error Code Description Recommended Action

3301-xx CD-ROM drive read test failed.

3305-xx CD-ROM drive seek test failed.

6600-xx ID test failed. 6605-xx Read test failed. 6608-xx Controller test failed.

6623-xx Random read test failed.

1. Replace the CD and retest.

2. Verify that drivers are loaded and properly installed.

3. Replace the CD-ROM drive and retest.

4. Replace the system board and retest.

Troubleshooting 2-15

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2.5.3 Running View System Information (INSPECT)

The View System Information (INSPECT) utility provides information about the computer and installed or connected devices. You can display, print, or save the information.

In order to access the INSPECT utility, follow the instructions below:

1. Connect a printer if you want to print the INSPECT information.

2. Turn on or restart the computer.

3. Access Compaq Utilities by pressing F10 when the cursor blinks in the upper-right

corner of the display.

4. If prompted, select a language.

5. Click View System Information (INSPECT).

6. Click the item you want to view. The list includes the following:

■ System ■ Audio

■ ROM ■ Operating system

■ Keyboard ■ System files

■ System ports ■ Windows files

■ System storage ■ Miscellaneous

■ Graphics

■ Memory

7. Follow the instructions on the screen to cycle through the screens, to return to the list and choose another item, or to print the information.

8. Select Exit Inspect.

■ Network (applicable only i

computer is docked in the Convenience Base II)

2.5.4 Running Compaq Diagnostics

Compaq Diagnostics provides computer component information when the operating system is working.

If you are running Windows 95, access Compaq Diagnostics for Windows by double-clicking My Computer ⇒ Control Panel ⇒ Compaq Diagnostics.

2.5.5 Boot Sequencing

1. Run Computer Setup.

2. Click the System Features icon ⇒ Boot Management box ⇒ MultiBoot tab.

3. Designate the hard drive boot (startup) sequence you want.

4. Click OK to accept the changes.

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2.5.6 Factory Default Settings

Initialization

Enable POST Memory Test Checked (enabled) Keyboard numbers Lock Unchecked (Off)

1 Hard drive in the computer

2 Hard drive in the computer MultiBay Boot display Auto Language Language of country

Ports

Serial/infrared ports

Serial port 3F8, IRQ4

Infrared port 2F8, IRQ3 Parallel port 378, IRQ7 Ethernet port 300, IRQ9

Power

Low Battery Warning Beep Checked (enabled) External Energy Saving Monitor Connected Unchecked (not connected) Power Management

Enabled While operating power on battery

Conservation Level Medium

Level Definition

High Suspend Time: 5 minutes

Hibernation Timeout: Immediate Drive Timeout: 2 minutes Screen Timeout: 2 minutes

Medium Suspend Time: 10 minutes

Hibernation Timeout: 1 hour Drive Timeout: 6 minutes Screen Timeout: 4 minutes

Custom Suspend Time: disabled

Hibernation Timeout: low battery Drive Timeout: always on Screen Timeout: always on

Security

Enable QuickLock/QuickBlank Unchecked (Disabled) Enable Power-On Password Unchecked (Disabled) Disable Serial/Infrared Ports Unchecked (Enabled) Disable Parallel Port Unchecked (Enabled) Disable PC Card Slots Unchecked (Enabled) Setup Password Password blank Power-On Password Password blank Diskette Drives

Disable Diskette Drives Unchecked (Enabled)

Disable Diskette Boot Unchecked (Enabled)

Troubleshooting 2-17

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2.6 Troubleshooting without Diagnostics

Fn+F5

This section provides information about how to identify and correct some common hardware, memory, and software problems. It also explains several types of messages that may be displayed on the screen.

Since symptoms can appear to be similar, carefully match the symptoms of the computer malfunction against the problem description in the Troubleshooting tables to avoid a misdiagnosis.

2.6.1 Before Replacing Parts

When troubleshooting a problem, check the following items for possible solutions before replacing parts:

■ Verify that cables are connected properly to the suspected defective parts.

■ Verify that all required device drivers are installed.

■ Verify that all printer drivers have been installed.

2.6.1.1 Solving Audio Problems

Table 2-15

Solving Audio Problems

Problem Probable Cause Recommended Action(s)

Computer does not beep after the Power-On Self-Test (POST).

Computer does not beep to indicate a low-battery condition.

Audio playback is too low or too loud.

Internal speakers produce no sound.

Speaker volume has been turned down.

Low-battery warning beeps have been turned off.

System beeps have been turned down too low.

The computer volume control and/or the software volume control needs to be adjusted.

Volume has been muted. Press the increase volume control button to

Adjust the volume with the volume control buttons located at the top left corner of the computer.

Enable low-battery warning beeps in Windows 95 Power Properties or in Computer Setup power management.

Press to increase the volume of the system beeps.

In Windows 95, adjust the computer volume control buttons and adjust the volume control in Multimedia Properties.

NOTE: The volume control in Multimedia Properties only affects the “Wave” audio

sources such as system sounds and *.wav file playback. To change other sources such as MIDI, video sound, and game effects, use the Volume Control application in accessories/Multimedia.

In Windows NT, adjust the multimedia volume control under the Accessories folder.

increase the volume. Press Fn+F5, then press the right arrow key to increase the volume of the system beeps

, then press the right arrow key

Continued

2-18 Troubleshooting

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Table 2-15 Solving Audio Problems

Continued

Problem Probable Cause Recommended Action(s)

Internal speakers produce no sound (continued).

Internal speaker does not produce sound when an external audio source is connected to the stereo line-in jack.

External microphone does not work.

No sound from game program.

No sound from headphones. Volume or mixing controls set

External speakers or headphones are connected to the computer.

Use the external speakers or headphones or use the Convenience Base II speakers.

To use the internal speakers, disconnect the external speakers or headphones or undock the computer.

Speaker wires are not connected.

Make sure the speaker wires are connected

properly. Speakers are bad. Replace the speakers. Volume may be turned off or

set too low.

■ Adjust the volume control located at

the top right corner of the computer.

■ Use the volume control and mixing

features available in Control Panel ⇒ Multimedia.

■ Adjust the volume using the speaker

icon on the taskbar.

Line input may not be

Check line input connection. connected properly.

Headphones or speakers are connected to the stereo

Disconnect the headphones or speakers to

enable the internal speakers. speaker/headphone jack, which disables the internal speakers.

The wrong type of microphone or microphone plug is being used.

The microphone may not be connected properly.

Check to see if a monophonic electret

condenser microphone with a 3.5-mm plug

is being used.

Ensure that the microphone plug is properly

connected to the mono microphone jack. Sound source is not selected. Ensure that microphone is selected as the

recording source in Control Panel ⇒

Multimedia and that the recording level is

adjusted. Audio settings are not set

Check the game program audio settings. correctly.

Computer volume control is turned down.

Adjust the volume with the volume control

buttons located at the top right corner of

the computer. Headphones are connected. Use or disconnect the headphones.

incorrectly.

■ Adjust the volume with the volume

control buttons located at the top right corner of the computer.

■ Use the volume control and mixing

features available in Control Panel ⇒ Multimedia.

Sound source not selected. Verify that the sound source is selected in

Control Panel ⇒ Multimedia. Volume or mixing controls set

incorrectly.

■ Adjust the volume with the volume

control buttons located on the right side of the computer.

■ Check the volume and mixer controls

in Control Panel ⇒ Multimedia.

Troubleshooting 2-19

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2.6.1.2 Solving Battery Problems

Fn+F5

The following table lists some common battery problems and recommended actions to take when they occur. The “Solving Power Problems” section in this chapter also may

be applicable.

Table 2-16

Solving Battery and Battery Gauge Problems

Problem Probable Cause Recommended Action(s)

The computer turns on the first time it is used, but the battery does not charge.

Computer does not turn on when battery pack is inserted and power cord is unplugged.

Computer beeped five times and battery light is blinking.

Computer battery light blinks to indicate low battery condition, but computer does not beep.

Battery light does not turn on to indicate battery pack Is charging.

Battery pack is warm to the touch after charging.

The battery pack is in ship mode.

Battery is discharged.

Computer has entered a low-battery condition.

Low battery beeps were turned off.

Volume is turned off or turned down too low.

Battery pack is already charged.

Battery pack was exposed to temperature extremes.

Battery pack is at the end of its life.

Warming occurs during charging.

Remove and reinsert the battery pack.

Ensure that the battery pack is properly installed.

Connect the computer to an external power source and charge the battery pack.

Replace the battery pack with a fully charged battery pack.

Check battery status by pressing Fn+F8. Immediately save any open file(s). Then do

one of the following:

1. Connect the computer to an external power source.

2. Turn the computer off and replace the battery pack.

Run Computer Setup and turn on the low battery warning beeps.

Press system warning beeps.

No action is necessary.

Allow time for the battery pack to return to room temperature.

Replace the battery pack.

No action is required.

to adjust the volume of the

Continued

2-20 Troubleshooting

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Table 2-16 Solving Battery and Battery Gauge Problems

Problem Probable Cause

Computer turned off and information in memory was lost when the battery pack was replaced.

You have to set the date and time every time you turn on the computer.

Battery pack charge does not last as long as expected.

Computer is beeping and battery power light is blinking.

Hibernation was disabled, Suspend was not initiated, or AC power was not connected before the discharged battery pack was removed.

Real time clock (RTC) battery is at the end of its life.

Battery pack is being exposed to high temperatures or extremely cold temperatures.

Battery pack has partially self-discharged.

Power management is disabled.

An external device or PC Card is draining the battery.

Battery pack charge is low. Do one of the following:

Continued

Recommended Action(s)

To prevent loss of information next time, initiate Suspend, enable Hibernation, or connect AC power before changing batteries..

Replace the RTC battery.

Keep the battery pack within the recommended operating temperature range 50°F to 104°F (10°C to 40°C) or recommended storage range -4°F to 86°F (-20°C to 30°C ). Recharge the battery pack.

If the computer is disconnected from the external power for more than two weeks, remove the battery pack to reduce the selfdischarge rate.

Press Fn+F7 and set the power conservation level.

Turn off or disconnect external devices when not using them.

■ Charge the battery pack.

■ Replace the battery pack.

■ Connect the computer to an external

power source.

■ Initiate Hibernation.

2.6.1.3 Solving CD-ROM Drive Problems

Table 2-

Solving CD-ROM Drive Problems

Problem Probable Cause

CD-ROM drive cannot read a compact disc.

CD-ROM drive is not recognized by the computer.

Compact disc is not properly seated in the CD-ROM drive.

Compact disc is loaded in the CD loading tray upside down.

Compact disc has a scratch on its surface.

CD-ROM drive is not connected properly.

Recommended Action(s)

Open the CD loading tray, lay the compact disc on it, then close the tray.

Open the CD loading tray, turn over the compact disc (label facing up), then close the tray.

Insert a different compact disc.

Turn off the computer, remove the CD-ROM drive and reinsert it.

Troubleshooting 2-21

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2.6.1.4 Solving Diskette and Diskette Drive Problems

Table 2-18

Solving Diskette and Diskette Drive Problem

Problem Probable Cause Recommended Action(s)

Diskette drive cannot read a diskette.

Diskette drive cannot write to a diskette.

Diskette media has a bad sector.

Using the wrong diskette type for the diskette drive type.

Diskette is not formatted. Format the diskette.

Diskette is write-protected. Use another diskette that is not

Writing to the wrong drive. Check the drive letter in your path

Not enough space is left on the diskette.

Disable diskette write ability is turned on.

Copy remaining files to the hard drive or another formatted diskette. Reformat the diskette.

Use the required diskette type.

If you are using Windows 95:

1. From the Windows 95 desktop, double-click My Computer.

2. Click 3 ½ Floppy (A:) ⇒ File ⇒ Format.

3. Fill in the appropriate information, then click Start.

If you are using Windows NT, format the diskette by entering format a: at the system prompt.

If you are using Windows 95:

1. From the Windows 95 desktop, double-click My Computer.

2. Click 3 ½ Floppy (A:) ⇒ File ⇒ Format.

3. Fill in the required information, then click Start.

If you are using Windows NT, format the diskette by entering format a: at the system prompt.

write-protected or disable the write-protect feature.

statement. Save the information to another diskette.

Run Computer Setup. Click on the Storage icon. Make sure Disable diskette write ability is not checked.

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2.6.1.5 Solving Hard Drive Problems

CAUTION: To prevent loss of information, always maintain an up-to-date backup of the

hard drive.

Table 2-19

Solving Hard Drive Problems

Problem Probable Cause Recommended Action(s)

Cannot access hard drive. Hard drive is not seated. Shut down the computer, remove and

Hard drive was inserted while computer was on, in Suspend, or in Hibernation.

Hard drive may be damaged. Try inserting another hard drive.

Reading hard drive takes an unusually long time after restarting the computer.

Hard drive error occurs. Hard drive has bad sectors or

Hard drive error occurs. Hard drive may be damaged. Try inserting another removable drive, if the

Errors occur after starting from an additional hard drive.

Hard drive does not work. Hard drive is not seated. Turn off and unplug the computer, remove

Hibernation was initiated and system is now exiting from it.

has failed.

Additional hard drive does not have the software and drivers necessary to boot and operate correctly.

reinsert the hard drive, then turn on the computer.

Shut down the computer, then turn it on again to initialize it during power on.

Give the system time to restore the previously saved data.

Do one of the following:

■ If you are running Windows 95, access

ScanDisk by clicking Start ⇒ Programs ⇒ Accessories ⇒ System Tools ⇒

ScanDisk, then check the Automatically fix errors box. Click Start to begin scanning.

If you are running Windows NT, go to the system prompt and type chkds scan for errors.

■ Reformat the hard drive.

hard drive is in the MultiBay. Boot from the hard drive supplied with the

computer or another hard drive that has the necessary software and drivers.

the hard drive, then reinsert it.

Troubleshooting 2-23

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2.6.1.6 Solving Hardware Installation Problems

Table 2-20

Solving Hardware Installation Problems

Problem Probable Cause Recommended Action(s)

New device is not recognized as part of the computer system.

The system did not automatically configure the new device.

Cable(s) of new external device are loose or power cables are unplugged.

Power switch of new external device is not turned on.

New device is not configured for Windows NT.

In Windows 95, double-click the Add New Hardware icon in Control Panel.

Refer to the documentation that came with the new device for installation instructions.

Ensure that all cables are properly and securely connected and the power cord is plugged into an electrical outlet.

1. Turn off the computer.

2. Turn on the external device.

3. Turn on the computer to integrate the device with the computer system.

Use Computer Setup to view settings for the new device or to reset the configuration settings for preinstalled devices.

2-24 Troubleshooting

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2.6.1.7 Solving Infrared Connection Problems

NOTE: The computer is shipped with the infrared port disabled. The port must be

enabled each time the computer is started or restarted. Follow these steps to enable the infrared port.

1. Click Start ⇒ Settings ⇒ Control Panel.

2. Double click the Infrared icon.

3. Select the Options tab.

4. Check the box labeled Enable Infrared Communications to select the Com3 port.

5. Click OK. The infrared icon appears on the task bar.

NOTE: Windows NT does not support infrared communication.

Table 2-21

Solving Infrared Connection Problems

Problem Cause Recommended Action(s)

Cannot link with another computer.

Data transmission problem Direct sunlight, fluorescent

Cannot connect at 4 MB/sec Fast IR driver not installed Fast-IR is not preinstalled. Download FAST-

Interrupt request (IRQ) conflict Check IRQ assignments for conflicts and

Baud rate conflict Select the same baud rate for both

# bits conflict Select the same “#bits” setting for both

Stop bit conflict Select the same stop byte for both

Parity conflict Select the same parity setting for both

light, or flashing incandescent light is close to the infrared connections.

Interference from other infrared devices

Physical obstruction Do not place objects between the two units

Movement Do not move either unit during data

Orientation Adjust devices so that they point within 30

Distance Verify that devices are not more than 3 feet

reassign as necessary.

computers.

computers. Remove the interfering light sources.

Keep remote control units and other infrared devices away from the infrared connections.

that will interfere with a line-of-sight data transmission.

transmission.

degrees of each other.

(1 meter) apart.

IR driver from Compaq web site and install.

Troubleshooting 2-25

Page 45

2.6.1.8 Solving Modem Problems

Table 2-22

Solving PC Card Modem Problems

Problem Probable Cause Recommended Action(s)

Modem loses connection. The connection from the

Noisy telephone line Phone line noise causing

Phone line noise causing a disconnection.

phone line to the modem is loose.

Call Waiting has not been disabled.

garbled or missing characters, or slow data transfer speeds.

Hang-up Delay S Register (S10) set too low.

Check to make sure the telephone cable is properly connected.

Disable Call Waiting.

1. Click Start ⇒ Control Panel ⇒ double-click Modems.

2. From the General tab of the Modems Properties page, click Dialing Properties.

3. From the My Locations tab of the Dialing Properties page, check the box labeled This location has call waiting. Select *70, 70#, or 1170 from the drop-down list to disable call waiting for your dialing area.

Check your telephone and modem cable connections. If they are a little loose, they can cause noise on the line.

Check with your local telephone company for a phone line filter.

Change S10 default to 150.

1. Click Start ⇒ Programs ⇒ Accessories ⇒ HyperTerminal.

2. Go to Command Mode.

3. Type ATS10=150 and press Enter.

This command causes the modem to take longer to disconnect even if there is noise on the line.

Continued

2-26 Troubleshooting

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Table 2-22 Solving PC Card Modem Problems

Continued

Problem Probable Cause Recommended Action(s)

No dial tone Phone service is not

connected to the telephone wall jack.

The modem is not responding to commands from the computer keyboard.

Speaker Control AT Command (ATM) is set to 0.

The modem is plugged into a digital PBX line rather than an analog line.

Characters are garbled and transfer rates are slow.

There is noise in the telephone line.

Verify service from the local phone company:

1. Unplug the telephone cable from the telephone wall jack.

2. Connect a telephone to the jack, pick up the handset, and listen for a dial tone. If there is a dial tone, reconnect the modem to the telephone wall jack with the telephone cable and make sure all connections are secure.

3. If there is still no dial tone, contact your local phone company or building manager.

Verify the modem and computer are connected:

1. Click Start ⇒ Programs ⇒ Accessories ⇒ HyperTerminal.

2. Go to Terminal Mode, then type AT and press the Enter key.

If the modem displays OK, the modem and computer are working together. If the modem displays ERROR, or does not respond, restart the computer and repeat step 1.

3. Type ATDT and listen for a dial tone.

4. Type ATH0 (zero) to hang up.

Set the Speaker Control to 1:

1. Click Start ⇒ Programs ⇒ Accessories ⇒ HyperTerminal.

2. Go to Command Mode, type ATM1 and press Enter.

3. Type ATH1 and listen for a dial tone.

4. Type ATH0 (zero) to hang up.

Plug the modem into an analog line. If you are in an office, the analog line is often the one connected to a fax machine or modem. To get an analog line in a hotel, request a room with a “data” line.

■ Check your telephone and modem

cable connections. If they are loose, they can cause noise on the line.

■ Check with your local telephone

company for a phone line filter.

Continued

Troubleshooting 2-27

Page 47

Table 2-22 Solving PC Card Modem Problems

Continued

Problem Probable Cause Recommended Action(s)

Phone line noise causes a disconnection.

Ten-digit dialing does not work correctly under Windows

95.

Modem cable disables/interferes with other telephony devices (Germany, Austria, and Switzerland only).

Modem does not dial correctly under Windows 95 (Switzerland and Germany only).

Hang-Up Delay S Register (S10) set too low.

Ten-digit dialing doesn’t work correctly under Windows 95, making it difficult to dial numbers in a different area code that are not long distance calls.

The modem cable does not provide the additional 4-wire connection required in Germany, Austria, and Switzerland to form the serial pass-through necessary so that other devices can work on the same phone line.

The “Wait for dial tone before dialing” check box is checked. This causes Windows 95 to issue an ATDT; command. A typical dial string would look like this:

ATDT; ATDTnnn-nnnn In Germany and Switzerland,

the ‘;’ dial modifier is not permitted to be used in this fashion by regulatory agencies since ATDT; takes the modem off-hook without dialing. Therefore, the modem returns an error message when attempting to dial. The error message reads:

“The computer is not receiving a response from the modem. Check that the modem is plugged in, and if necessary, turn the modem off, then turn it back on.”

Change S10 default to 150.

1. Click Start ⇒ Programs ⇒ Accessories ⇒ HyperTerminal.

2. Go to Command Mode.

3. Type ATS10=150 and press Enter.

This command causes the modem to take longer to disconnect even if there is noise on the line.

Since Windows 95 does not limit the number of digits you can enter in the Phone Number field, set the Area Code field to match your local area code. Then type the ten-digit telephone number in the Phone Number field.

To use another telephony device on the same line in these countries, unplug the modem cable from the wall jack first.

1. Click Start ⇒ Settings ⇒ Control Panel.

2. Double-click the Modems icon.

3. Click the Properties button.

4. Select the Connection tab.

5. Click the “Wait for dial tone before dialing” check box to clear it.

6. Click OK ⇒ Close.

2-28 Troubleshooting

Page 48

2.6.1.9 Solving PC Card Problems

Press

then press the right arrow

Resources. Deselect the

Contact service provider for a list of

Table 2-23

Solving PC Card Problems

Problem Probable Cause Recommended Action(s)

Computer does not beep when PC Card is inserted but PC Card works correctly.

Computer does not beep when PC Card is inserted and PC Card does not work.

Computer beeps twice, but modem and/or fax does not work.

Computer beeps twice bu network card does not work.

Computer beeps twice when

e card is inserted, bu

a stora the card does not work.

PC Card does not work Windows NT was runnin

System beeps are turned down.

PC Card sound effects have been disabled.

PC Card is not inserted properly.

The PC Card slots have been disabled.

Card or card driver is no compatible with the compute or with the operating system.

Telephone cord is not plugged in all the way.

The wrong COM port is being used to access the card.

Network server is

unavailable.

The wron bein storage card.

when the PC Card was inserted.

drive letter is

used to access the

Fn+F5,

key to increase the system beeps volume. In Windows 95, double-click PC Card icon ⇒

Global Settings tab. Deselect Disable PC Card Sound Effects.

Remove and reinsert the card avoid damaging the pins.

Run Computer Setup to enable the PC Card slots. When the system starts, press F10 then select Computer Setup ⇒ Other Devices ⇒ PC Card Controller ⇒

“Disabled” check box.

In Windows 95, click Start ⇒ Settings ⇒ Control Panel ⇒ System ⇒ Device

⇒ PCMCIA Socket. Double-click

Manager the Texas Instruments TI-1131 CardBus controller to view device properties. Deselect the “Disable in this hardware profile” check box.

compatible PC Cards.

Verify that the telephone connection is secure.

Verify the COM port assigned to the card and within the application is correct.

In Windows 95, click Start ⇒ Help ⇒ Contents ⇒ Troubleshooting ⇒ Problem. Follow the instructions on the screen.

Contact system administrator.

Open Windows Explorer and verify the drive letter.

Turn off the computer and reinsert the P Card.

ently t

Troubleshooting 2-29

Page 49

2.6.1.10 Solving Power Problems

Table 2-24

Solving Power Problems

Problem Probable Cause Recommended Action(s)

Computer will not turn on. Computer is not connected to

Computer will not turn on when connected to external power if battery pack is in the computer.

Computer turned off while it was left unattended and the power/suspend light is off.

Computer turned off while it was left unattended and will not turn on.

Computer initiated Suspend or turned off when it was docked.

Hibernation does not work properly.

Computer does not turn on when connected to external power and no batteries are installed.

a power source. Power cord to the external

power source is unplugged.

Battery pack is discharged. Insert a fully charged battery pack o

CMOS data is corrupt Refer to “Remove Battery and Wait”

Battery pack may be defective.

System initiated Hibernation after a preset timeout.

System initiated Hibernation and/or shut down because of a critical low-battery condition.

The maximum operating temperature was exceeded.

Hibernation was not reset after a memory upgrade.

Internal power supply is bad. Replace the internal power supply.

Insert battery pack or connect an externa power source.

Ensure that power cord connecting the computer and the external power source i plugged in properly.

connect an external power source.

Remove battery pack, insert another battery pack, and try again.

Turn on the computer to restore information at the point where Hibernation was initiated.

NOTE: To change the Hibernation timeout setting in Windows 95, click the Hibernation tab in Power Properties. In Windows NT, run Computer Setup and select Power Management.

Replace the battery pack with a fully charged battery pack or connect an external power source, then turn on the computer.

Computer is in a high temperature environment and the fan is not able to cool it. Let the computer cool down and turn it on again.

Make sure the ventilation intake and exhaust are not obstructed.

Reset Hibernation in the Power Management utility.

2-30 Troubleshooting

Page 50

2.6.1.11 Solving Screen Problems

hotkeys to display

external power source or replace the

IMPORTANT: Conduct all tests on a working monitor. If the recommended actions do not solve the problem, replace the display. If the problem persists with a new display, replace the system board.

Table 2-25

Solving Screen Problems

Problem Probable Cause Recommended Action(s)

Characters are dim. The brightness or contrast

Screen is blank. QuickLock/QuickBlank was

Computer screen is

and the screen on an

blan external monitor display information.

Screen is blank and the power/suspend li blinking.

Screen is blank and the power/suspend li battery light are blinking.

External monitor does not display information.

Small red, green, or blue spots appear on the computer CTFT display.

ht is

ht and the

control (if applicable) is not set properly.

Computer screen is in direct light.

Display is damaged. Replace the display.

initiated. Screen save was

initiated after the Power Management timeout period.

Brightness or contrast needs adjusting.

Screen has overheated. If computer is in direct sunlight, move it and

Display was switched to the external monitor.

System initiated Suspend. Press the suspend button to exit Suspend.

System has entered a critical low-battery condition.

External monitor was connected after the computer was turned on.

The external monitor signal cable or power cord is not properly connected.

Small spots, called on-pixels, often appear on CTFT screens. Compaq limits the number of these on-pixels to

0.003 percent.

Adjust the control(s) with the hotkeys: Fn+F9 and Fn+F10.

Tilt the display or move computer.

Enter the password to exit QuickLock/QuickBlank.

Press any key or click the mouse.

Adjust the control(s) with the hotkeys: Fn+F9 and Fn+F10.

allow it to cool. Press the Fn+F4

information on the computer screen.

Enter the power-on password if prompted. Immediately connect the computer to a

battery pack. Press the Fn+F4 hotkeys to switch to the

external monitor.

Ensure that the cables are properly connected.

No action is required.

Continued

Troubleshooting 2-31

Page 51

Table 2-25 Solving Screen Problems

Continued

Problem Probable Cause Recommended Action(s)

Display on an external monitor is distorted.

The image has a black border and does not fill the screen.

Incorrect display device drivers are installed or incorrect resolution is set.

The external monitor is not Energy Star compliant, but monitor energy saving feature is enabled.

The Desktop Area setting is smaller than the Resolution setting.

Double-click the Display icon in Control Panel, click the Settings tab, and set the correct display type and resolution for the external monitor.

Complete these steps:

1. Press any key or move the pointing device to restore the display.

2. If display remains distorted, turn off the monitor, then turn it on again.

3. Disable the monitor energy saving feature in Display Properties or in Computer Setup Power Management.

Adjust the settings for the Desktop Area and Resolution. Double-click Control Panel Display ⇒ Settings ⇒ Compaq.

Press the Fn+T keys to expand or shrink the image.

2.6.1.12 Solving USB Problems

Table 2-26

Solving USB Problems

Problem Probable Cause Recommended Action(s)

External device connected to a USB connector does not work.

External device connected to a USB connector does not work during startup (before Windows 95 loads).

External devices in lower tiers do not work.

The operating system limits external devices connected by USB to two tiers that can include no more than two hubs on the first tier and no more than one keyboard and one pointing device on the first or second tier.

During startup, only two tiers are supported by the USB connector. These tiers can include no more than two hubs on the first tier and no more than one keyboard and one pointing device on the first or second tier.

An unpowered hub is connected to another unpowered hub.

Reduce the number of connected external USB devices to no more than two hubs on the first tier, and no more than one keyboard and one pointing device on the first or second tier.

■ Use the external device only after

Windows 95 has loaded.

■ Reduce the number of connected

external USB devices to no more than two hubs on the first tier, and no more than one keyboard and one pointing device on the first or second tier.

■ Use only powered hubs.

■ Make sure that all unpowered hubs are

immediately preceded by powered hubs in the USB chain.

2-32 Troubleshooting

Page 52

chapte

ILLUSTRATED PARTS CATALOG

This chapter provides illustrated parts and references for spare parts. To review an illustrated parts breakdown of the computer, refer to the Illustrated Parts Map that comes with this guide.

Refer to Appendix C for illustrated parts and spare parts on the convenience bases for this computer.

Illustrated Parts Catalog 3-1

Page 53

3.1 System Unit

Figure 3-1. System Unit

3-2 Illustrated Parts Catalog

Page 54

Table 3-1

System Unit

Item Description Spares Part Number

1 12.1-inch CTFT display assembly 310367-001

* 13.3-inch CTFT display assembly 310368-001

Keyboard 310347-001

Keyboard (Belgian) 310347-181

Keyboard (Brazilian Portuguese) 310347-201

Keyboard (Danish) 310347-081

Keyboard (French) 310347-051

Keyboard (French Canadian) 310347-121

Keyboard (German) 310347-041

Keyboard (Italian) 310347-061

Keyboard (Japanese) 310347-292

Keyboard (Korean Hanguel) 310347-AD1

Keyboard (Latin American Spanish) 310347-161

Keyboard (Norwegian) 310347-091

Keyboard (Portuguese) 310347-131

Keyboard (Spanish) 310347-071

Keyboard (Swedish) 310347-101

Keyboard (Swiss English) 310347-111

Keyboard (Taiwanese) 310347-AB1

Keyboard (UK English) 310347-031

3 Top cover assembly 310370-001 4 Base enclosure assembly 310371-001

*Not illustrated

Illustrated Parts Catalog 3-3

Page 55

3.2 Mass Storage Devices

Figure 3-2. Mass Storage Devices

Table 3-2

Mass Storage Device

Item Description Spares Part Number

1 24x CD-ROM drive 310379-001 * DVD-ROM drive module 310336-001 2 4-GB hard drive 310344-001 * 6-GB hard drive 310365-001

3 1.44-MB, diskette drive 310378-001 4 Cable assembly, diskette drive 310376-001 5 LS-120 drive module 310331-001 6 100-MB ZIP drive module 310341-001

* 6-GB hard drive (M35EU) 316269-001 * Hard drive adapter 310343-001

* Not illustrated

3-4 Illustrated Parts Catalog

Page 56

3.3 Cables and Power Cords

Figure 3-3. Cables and Power Cords

Table 3-3

Cables and Power Cords (System)

Item Description Spares Part Number

1 AC power cord, 6’, black (US) 246959-001

* AC power cord, 6’, black (Australia) 246959-011 * AC power cord, 6’, black (Denmark) 246959-081 * AC power cord, 6’, black (Europe) 246959-021 * AC power cord, 6’, black (Italy) 246959-061 * AC power cord, 6’, black (Japan) 246959-291 * AC power cord, 6’, black (Korea) 246959-AD1 * AC power cord, 6’, black (Singapore) 246959-AG1 * AC power cord, 6’, black (UK) 246959-031

2 External AC adapter 310362-001

* Not illustrated

Illustrated Parts Catalog 3-5

Page 57

3.4 Standard and Optional Boards

Figure 3-4. Standard and Optional Boards

Item Description Spares Part Number

1 DC-DC voltage converter 310361-001 2 System board with 266-MHz Intel Pentium II / 32-MB 310358-001

* System board with 300-MHz Intel Pentium II / 32-MB 310359-001 * System board with 266-MHz Intel Pentium II / 64-MB 310387-001 * System board with 300-MHz Intel Pentium II / 64-MB 310388-001

3 Memory board (SODIMM), 16-MB, 60 ns, non parity 313917-001

* Memory board (SODIMM), 32-MB, 60 ns, non parity 313911-001 * Memory board (SODIMM), 64-MB, 60 ns, non parity 313918-001 * Memory board (SODIMM), 128-MB, 60 ns, non parity 310345-001

4 LED/Switch board 310398-001

* Not illustrated

3-6 Illustrated Parts Catalog

Table 3-4

Standard and Optional Boards

Page 58

3.5 Options

Figure 3-5. Options

Table 3-5

Options

Item Description Spares Part Number

1 External battery charger with AC Adapter 310346-001 2 Automobile/aircraft adapter 313919-001 3 Li-Ion battery pack (6 cell) 310356-001 4 Extended Life Li-Ion battery pack (9 cell) 310357-001

* Mobile 3500 expansion unit 310342-001

* Not illustrated

Illustrated Parts Catalog 3-7

Page 59

3.6 Miscellaneous Parts

Figure 3-6. Miscellaneous Parts

3-8 Illustrated Parts Catalog

Page 60

Table 3-6

Miscellaneous Parts

Item Description Spares Part Number

1 Miscellaneous plastics kit :

a Memory compartment cover b Display hinge covers c M35EU connector cover d Hard drive cover e PC Card bay cover

* Status/Switch cover

2 Auxiliary NiCd battery 310382-001 3 CMOS/RTC Li-Ion battery 310366-001 4 Fan 310363-001 5 Speaker 310377-001

* Screw kit 310373-001 * Logo kit 310375-001 * Country kit (North America) 310374-001 * Hard drive adapter 310343-001

* Not illustrated

310372-001

3.7 Documentation

Table 3-7

Documentation

Description Spare Part Number

Illustrated Parts Map 310407-001 Maintenance and Service Guide 310406-001

Illustrated Parts Catalog 3-9

Page 61

3-10 Illustrated Parts Catalog

Page 62

chapte

REMOVAL AND REPLACEMENT PRELIMINARIES

This chapter provides essential information for proper and safe removal and replacement service.

4.1 Tools Required

You will need the following tools to complete the removal and replacement procedures:

■ Magnetic Torx T-8 screwdriver (for all screws unless otherwise specified)

■ 7-mm hex socket (for bushing guides)

■ Small flat-blade screwdriver (optional)

■ Scribe

■ Tweezers

4.2 Service Considerations

Listed below are some of the considerations that you should keep in mind during disassembly and assembly procedures.

4.2.1 Plastic Parts

Using excessive force during disassembly and reassembly can damage plastic parts. Use care when handling the plastic parts. Apply pressure only at the points designated in the maintenance instructions.

IMPORTANT: As you remove each subassembly from the computer, place it (and all accompanying screws) away from the work area to prevent damage.

Removal and Replacement Preliminaries 4-1

Page 63

4.2.2 Cables and Connectors

Handle cables with extreme care to avoid damage. Apply only the tension required to unseat or seat the cables during removal and insertion. Handle cables by the connector whenever possible. In all cases, avoid bending, twisting, or tearing cables. Route cables in such a way that they cannot be caught or snagged by parts being removed or replaced. Handle flex cables with extreme care; they tear easily.

CAUTION: Place cables in their proper location during the reassembly process.

Improper cable placement can damage the computer.

4.3 Preventing Damage to Removable Drives

Removable drives are fragile components that must be handled with care. To prevent damage to the computer, damage to a removable drive, or loss of information, observe these precautions:

■ Before removing or inserting a hard drive, shut down the computer. If you are

unsure whether the computer is off or in Hibernation, turn the computer on, then shut it down.

■ Before removing a diskette drive or CD-ROM drive, ensure that a diskette or disc is

not in the drive. Ensure that the CD-ROM tray is closed.

■ Before handling a drive, ensure that you are discharged of static electricity. While

handling a drive, avoid touching the connector.

■ Handle drives on surfaces that have at least one inch of shock-proof foam.

■ Avoid dropping drives from any height onto any surface.

■ Do not use excessive force when inserting a drive into the MultiBay.

■ Avoid exposing a hard drive to products that have magnetic fields such as monitors

or speakers.

■ Avoid exposing a drive to temperature extremes or to liquids.

■ If a drive must be mailed, do the following: ❏ Place the hard drive into a bubble pack mailer and then into a box or other

suitable form of protective packaging.

❏ Label the package “Fragile: Handle With Care.”

4-2 Removal and Replacement Preliminaries

Page 64

4.4 Preventing Electrostatic Damage

Many electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine the degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many cases the discharge contains enough power to alter device parameters or melt silicon junctions.

A sudden discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs anyway. An electronic device exposed to electrostatic discharge may function normally for a while, then degrade in performance or fail early.

4.4.1 Packaging and Transporting Precautions

Use the following grounding precautions when packaging and transporting equipment:

■ To avoid hand contact, transport products in static-safe containers such as tubes,

bags, or boxes.

■ Protect all electrostatic-sensitive parts and assemblies with conductive or approved

containers or packaging.

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

workstations.

■ Place items on a grounded surface before removing them from their container.

■ Always be properly grounded when touching a sensitive component or assembly.

■ Place reusable electrostatic-sensitive parts from assemblies in protective packaging

or non-conductive foam.

■ Use transporters and conveyers made of antistatic belts and roller bushings. Ensure

that mechanized equipment used for moving materials is wired to ground, and that proper materials were selected to avoid static charging. When grounding is not possible, use an ionizer to dissipate electric charges.

Removal and Replacement Preliminaries 4-3

Page 65

4.4.2 Workstation Precautions

Use the following grounding precautions at workstations:

■ Cover the workstation with approved static-dissipative material (refer to Table 4-2

later in this chapter).

■ Use a wrist strap connected to a properly grounded work surface and use properly

grounded tools and equipment.

■ Use field service tools, such as cutters, screwdrivers, and vacuums that are

conductive.

■ When using fixtures that must directly contact dissipative surfaces, use fixtures

made of static-safe materials only.

■ Keep work area free of non-conductive materials such as ordinary plastic assembly

aids and styrofoam.

■ Handle electrostatic-sensitive components, parts, and assemblies by the case or

PCM laminate. Handle them only at static-free workstations.

■ Avoid contact with pins, leads, or circuitry.

■ Turn off power and input signals before inserting or removing connectors or test

equipment.

4-4 Removal and Replacement Preliminaries

Page 66

4.4.3 Grounding Equipment and Methods

Grounding equipment must include either a wrist strap or a foot strap at a grounded workstation.

■ When seated, wear a wrist strap connected to a grounded system. Wrist straps are

flexible straps with a minimum of one megohm ±10% resistance in the ground cords. To provide proper ground, a strap must be worn snug against the skin. On grounded mats with banana-plug connectors, connect a wrist strap with alligator clips.

■ When standing, use foot straps and a grounded floor mat. Foot straps (heel, toe, or

boot straps) can be used at standing workstations and are compatible with most types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with a minimum of one-megohm resistance between the operator and ground. To be effective, the conductive strips must be worn in contact with the skin.

Other grounding equipment recommended for use in preventing electrostatic damage include:

■ Antistatic tape

■ Antistatic smocks, aprons, or sleeve protectors

■ Conductive bins and other assembly or soldering aids

■ Non-conductive foam

■ Conductive tabletop workstations with ground cord of one-megohm resistance

■ Static-dissipative table or floor mats with hard tie to ground

■ Field service kits

■ Static awareness labels

■ Material-handling packages

■ Non-conductive plastic bags, tubes, or boxes

■ Metal tote boxes

Removal and Replacement Preliminaries 4-5

Page 67

4.4.4 Electrostatic Voltage Levels and Protective Materials

Table 4-1 shows how humidity affects the electrostatic voltage levels generated by different activities.

Table 4-1

Typical Electrostatic Voltage Levels

Relative Humidity

Event 10% 40% 55%

Walking across carpet 35,000 V 15,000 V 7,500 V Walking across vinyl floor 12,000 V 5,000 V 3,000 V Motions of bench worker 6,000 V 800 V 400 V Removing DIPS from plastic tube 2,000 V 700 V 400 V Removing DIPS from vinyl tray 11,500 V 4,000 V 2,000 V Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V Removing bubble pack from PCB 26,500 V 20,000 V 7,000 V Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V

NOTE: 700 volts can degrade a product.

Table 4-2 lists the shielding protection provided by antistatic bags and floor mats.

Table 4-2

Static-Shielding Materials

Material Use Voltage Protection Level

Antistatic plastic Bags 1,500 V Carbon-loaded plastic Floor mats 7,500 V Metallized laminate Floor mats 15,000 V

4-6 Removal and Replacement Preliminaries

Page 68

chapte

REMOVAL AND REPLACEMENT PROCEDURES

This chapter provides the removal and replacement procedures for the computer subassemblies.

5.1 Serial Number

The computer serial number should be provided to Compaq support when requesting information or ordering spare parts. The serial number 1 is located on the bottom of the computer (Figure 5-1).

Figure 5-1. Serial Number Location

Removal and Replacement Procedures 5-1

Page 69

5.2 Disassembly Sequence

Refer to the disassembly steps before disassembling the computer. Disassemble only the components necessary to gain access to the sub-assembly you are servicing.

5.3 Preparing the Computer for Disassembly

5.3.1 Disconnecting the AC Power

5.3.1.1 Convenience Base

5.3.1.2 Mobile 3500 Expansion Unit

5.3.2 PC Card

5.3.3 Battery Pack

5.4 Memory Board

5.5 Hard Drive

5.5.1 Hard Drive Cover

5.5.2 Nickel Cadmium Auxiliary Battery

5.5.3 Lithium Real Time Clock Battery

5.5.4 Hard Drive

5.6 Keyboard

5.7 Display Assembly

5.7.1 Display Hinge Covers

5.7.2 Switch Cover/Status Panel

5.7.3 Display Assembly

5.8 Top Cover Assembly

5.8.1 DC-DC Converter

5.8.2 System Board

5.8.3 Fan

5.9 Removing An Optical Disc Bay Device

5.3 Preparing the Computer for Disassembly

Before beginning the removal and replacement procedures, complete the following:

1. Disconnect the modem line cord.

2. Disconnect the AC power and any external devices.

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

system components to cool before touching.

5.3.1 Disconnecting the AC Power

Before beginning service procedures on the computer, remove all power from the system to prevent damage to the equipment or personal injury. Select the appropriate steps, depending on whether the computer is docked or not.

5-2 Removal and Replacement Procedures

Page 70

5.3.1.1 Removing the Computer From the Convenience Base

If the computer is docked in the convenience base, it must be undocked before performing additional work. Complete the following steps to undock the computer.

1. Close all applications and exit the operating system.

2. Turn off the computer and the convenience base.

3. Disconnect the AC power and any external cables.

4. Close the computer.

5. Pull the docking lever 1 forward to undock the computer.

6. Release the retaining latch.

7. Lift the computer from the convenience base.

Figure 5-2. Undocking the Computer and M35EU

Removal and Replacement Procedures 5-3

Page 71

5.3.1.2 Disconnecting the Computer from the

Mobile 3500 Expansion Unit

After undocking the computer, begin with step 6. If the computer is not docked, perform the following steps:

1. Close all applications and exit the operating system.

2. Turn off the computer 1 by depressing the power switch.

3. Turn off and disconnect any external devices.

4. Disconnect the AC power cord from the power source.

5. Disconnect the AC power cord from the computer.

6. Pull the release lever 2 on the Mobile 3500 Expansion Unit (M35EU) to release the

computer.

7. Disconnect the connectors 3 by lifting the computer from the back corners.

Figure 5-3. Disconnecting the Computer From the M35EU

5-4 Removal and Replacement Procedures

Page 72

8. Slide the expansion slot cover to the closed position.

Figure 5-4. Closing the Expansion Slot Cover

Reverse the procedure to connect the computer to the M35EU.

Removal and Replacement Procedures 5-5

Page 73

5.3.2 Removing the PC Card

Remove any installed PC (PCMCIA) Cards before performing any service on the computer. To remove a PC Card, complete the following steps:

1. Open PC Card door.

2. To eject the PC Card, firmly depress the PC Card eject button 1.

3. Remove the card 2.

Figure 5-5. Removing the PC Card

5-6 Removal and Replacement Procedures

Page 74

5.3.3 Removing the Battery Pack

Remove the battery pack before beginning any internal maintenance on the computer.

WARNING: Metal objects can damage the battery pack as well as the battery contacts in

the battery compartment. To prevent damage, do not allow metal objects to touch the battery contacts. Place only the battery pack for the Compaq Armada Personal Computer into the battery compartment. Do not force the battery pack into the bay.

WARNING: Do not crush, puncture, or incinerate the battery pack. Do not dispose of in

water. Do not expose to temperatures higher than 60°C. Do not open a battery pack, as this damages the pack, makes it unserviceable, and exposes potentially harmful battery components. There are no field-serviceable parts located inside the battery pack.

To remove the battery pack from the computer, complete the following steps:

1. Open the display to release the battery.

CAUTION: Failure to open the display before removing or inserting the battery pack can result in damage to the battery pack retention features.

Slide the battery pack retainer up to release the battery pack 1.

3. Pull the battery pack 2 out of the computer.

Figure 5-6. Removing the Battery Pack

Removal and Replacement Procedures 5-7

Page 75

5.4 Memory Board

If a memory expansion board option has been previously installed in the computer, it must be removed before another is installed. To remove the memory board, complete the following steps:

1. Prepare the computer for disassembly (Section 5.3).

2. Place the computer bottom side up on the table with the front of the unit facing you.

3. Remove the security screw 1.

4. Lift the right edge of the memory compartment cover 2 and remove it from the

computer.

Figure 5-7. Lifting the Memory Compartment Cover

5-8 Removal and Replacement Procedures

Page 76

5.4.1 Removing the Memory Board

1. Pull out the right and left locking tabs 1 on each end of the memory expansion

board. This releases the memory board and allows it to rotate upward to ease removal.

CAUTION: If you need to remove the memory expansion board, be sure to release the locking tabs that secure the memory board in the slot. The connectors may break and cause irreparable damage to the system board if the tabs are not released.

Figure 5-8. Releasing the Memory Expansion Board

2. Rotate the free edge 2 of the memory module upward.

3. Pull the memory module from the slot at a 45 degree angle to the system board.

Removal and Replacement Procedures 5-9

Page 77

5.4.2 Installing the Memory Board

To install a memory board, complete the following steps:

1. Insert the memory board 1 into the memory slot.

2. Rotate the free edge of the memory board toward the computer 2 so that it lays flat

in the memory compartment.

3. Press the memory board firmly into place to seat the connections and to engage the

locking tabs.

Figure 5-9. Installing the Memory Board

Reinstall the memory compartment cover by placing the left edge in the compartment and pressing the right edge toward the system unit. Press it firmly into position until the locking tabs secure the cover into position. Replace the security screw, if one was removed during disassembly.

5-10 Removal and Replacement Procedures

Page 78

5.5 Hard Drive

The hard drive cover secures the hard drive, the auxiliary battery, and the RTC battery in place.

5.5.1 Removing the Hard Drive Cover

A security screw holds the hard drive cover in place. To remove the hard drive cover, complete the following steps:

1. Prepare the computer for disassembly (Section 5.3).

2. Turn the computer bottom side up and position it so that the right side of the unit is

toward you.

3. Remove the screw from the drive cover.

4. Slide the cover towards you and lift the cover from the computer.

Figure 5-10. Removing the Hard Drive Cover Security Screw

Removal and Replacement Procedures 5-11

Page 79

5.5.2 Removing the Nickel Cadmium Auxiliary Battery

WARNING: There is a risk of explosion and injury if the battery is incorrectly replaced or

handled improperly. Do not attempt to recharge, disassemble, immerse in water, or dispose of it in fire. Replacement should be done using the Compaq spare part for this computer.

To remove or replace the auxiliary battery, complete the following procedures.

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the hard drive cover.

CAUTION: To prevent damage to the battery assembly, do not pull on the battery cable.

Using tweezers, disconnect the auxiliary battery from the system unit.

4. Lift the auxiliary battery from the hard drive bay.

Figure 5-11. Removing the Auxiliary Battery

Reverse the procedure to install a replacement auxiliary battery.

5-12 Removal and Replacement Procedures

Page 80

5.5.3 Removing the Lithium Real Time Clock Battery

WARNING: There is a risk of explosion and injury if the battery is incorrectly replaced or

handled improperly. Do not attempt to recharge, disassemble, immerse in water, or dispose of it in fire. Replacement should be done using the Compaq spare part for this computer.

To remove or replace the RTC battery, complete the following procedures.

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the hard drive cover.

CAUTION: To prevent damaging the battery, do not pull on the battery cable.

Using tweezers, disconnect the RTC battery from the system unit.

4. Lift the RTC battery from the hard drive bay.

Figure 5-12. Removing the RTC Battery

Reverse the procedure to install a replacement RTC battery.

Removal and Replacement Procedures 5-13

Page 81

5.5.4 Removing the Hard Drive

To remove the hard drive, complete the following procedures.

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the hard drive cover.

3. Lift the tab on the hard drive from the hard drive bay.

4. Slide the hard drive away from the connector, and using the tab, lift the hard drive

from the computer with the tab.

Figure 5-13. Removing the Hard Drive

Reverse the procedure to re-install the hard drive.

5-14 Removal and Replacement Procedures

Page 82

5.6 Keyboard

To remove the keyboard, complete the following procedures.

1. Prepare the computer for disassembly (Section 5.3).

2. Place the computer on a level workspace with the front of the unit facing you.

3. Open the display to the vertical (perpendicular to workspace to prevent tipping of

the unit) position.

4. To release the keyboard, insert the tip of a small screwdriver into the groove above

each of the four keyboard latches and slide the latch towards you.

CAUTION: To prevent damage to the keyboard and/or keys, do not use the key

caps to lift the keyboard.

5. Lift the back edge of the keyboard. Be careful not to stress the cables.

Figure 5-14. Releasing the Keyboard Latches

Removal and Replacement Procedures 5-15

Page 83

6. Slide the keyboard toward you to gain access to the keyboard and pointing device

cable.

7. Release the strain relief.

8. Using tweezers or the tip of a scribe, release the latch on the keyboard and pointing

device ZIF connectors.

9. Disconnect the keyboard and pointing device cables.

10. Lift the keyboard from the system unit.

Figure 5-15. Disconnecting the Keyboard and Pointing Device Cable

To replace the keyboard, reverse the procedure above.

5-16 Removal and Replacement Procedures

Page 84

5.7 Display Assembly

To remove the display assembly, complete the following steps:

5.7.1 Removing the Display Hinge Covers

1. Prepare the computer for disassembly (Section 5.3).

2. Place the computer on the table right side up and with the rear facing you.

3. Slide the hinge covers away from the system unit.

Figure 5-16. Removing the Hinge Covers

Removal and Replacement Procedures 5-17

Page 85

5.7.2 Removing the Switch Cover/Status Panel

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the keyboard (Section 5.6).

3. Close the display.

4. Remove the hinge covers (Section 5.7).

5. Place the computer bottom side up and with the front of the unit toward you.

6. Remove the screw from the left rear corner of the base enclosure.

Figure 5-17. Removing the switch cover screw

5-18 Removal and Replacement Procedures

Page 86

7. Turn the computer top side up with the front of the unit toward you.

8. Open the display.

9. Lift the switch cover / status panel from the computer.

Figure 5-18. Removing the switch cover/status panel

To replace the switch cover, reverse the procedure above.

Removal and Replacement Procedures 5-19

Page 87

5.7.3 Removing the Display Assembly

CAUTION: Do not reuse the hinge screws removed from the previously installed display.

These screws may back out of the display hinges and cause the display assembly to loosen from the base enclosure.

To remove the display assembly, complete the following procedure:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the keyboard (Section 5.5).

3. Remove the hinge covers (Section 5.7).

4. Remove the switch cover assembly (Section 5.7).

5. Using tweezers, separate the backlight power cable and the display cable from the

system board.

Figure 5-19. Disconnecting the Display Cables

CAUTION: Do not pull the connector from the socket by the wires. Pulling on the wires may

damage them, rendering the display inoperative.

5-20 Removal and Replacement Procedures

Page 88

6. Close the display.

7. Remove the two screws from the left display clutch and the two screws from the

right display clutch.

8. Lift the display assembly from the base enclosure.

Figure 5-20. Removing the Display Assembly

Reverse the procedure to replace the display assembly.

Note: Always replace the four loctite screws with the replacement screws supplied in

the service kit.

Removal and Replacement Procedures 5-21

Page 89

5.8 Top Cover Assembly

To remove the top cover assembly, complete the following procedures:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the keyboard (Section 5.6).

3. Remove the hinge covers (Section 5.7).

4. Remove the switch cover assembly (Section 5.7).

5. Remove the display assembly (Section 5.7).

6. Turn the computer bottom side up.

7. Remove the seven (7) screws from the bottom of the system unit.

Figure 5-21. Removing the screws from the bottom of the system unit

5-22 Removal and Replacement Procedures

Page 90

8. Remove the screw from the rear of the unit.

9. Remove the two screws from the top cover.

10. Lift the top cover from the base enclosure assembly.

Figure 5-22. Removing the Top Cover Assembly

Removal and Replacement Procedures 5-23

Page 91

5.8.1 Removing the DC-DC Converter

To remove the DC-DC converter, complete the following procedures:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the keyboard (Section 5.6).

3. Remove the display assembly (Section 5.7).

4. Remove the top cover assembly (Section 5.8).

5. Remove the screw from the converter board.

6. Remove the DC-DC converter

Figure 5-23. Removing the DC-DC Converter

CAUTION: Failure to use the nickel colored screw to secure the DC-DC Converter to the

system board may result in damage to the system board.

To replace the DC-DC converter, reverse the steps.

5-24 Removal and Replacement Procedures

Page 92

5.8.2 Removing the System Board

To remove the system board, complete the following procedures:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the lithium real-time clock battery (Section 5.5).

3. Remove the auxiliary battery. (Section 5.5).

4. Remove the hard drive (Section 5.5).

5. Remove the memory board (Section 5.4).

6. Remove the keyboard (Section 5.6).

7. Remove the display assembly (Section 5.7).

8. Remove the top cover assembly (Section 5.9).

9. Remove the DC-DC Converter (Section 5.9).

10. Remove the three screws from the system unit.

11. Remove the docking guides from the rear panel.

12. Disconnect the speaker cable from the system board. The speaker is located in the front right corner of the system board.

13. Lift the right edge of the system board to a 45-degree angle and lift from the base enclosure.

Figure 5-24. Removing the System Board

To replace the system board, reverse the steps.

Removal and Replacement Procedures 5-25

Page 93

5.8.3 Removing the Fan

To remove the fan, complete the following procedures:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the lithium real-time clock battery (Section 5.5).

3. Remove the auxiliary battery. (Section 5.5).

4. Remove the hard drive (Section 5.5).

5. Remove the keyboard (Section 5.6).

6. Remove the display assembly (Section 5.7).

7. Remove the top cover assembly (Section 5.9).

8. Remove the system board (Section 5.8)

9. Disconnect the fan connector.

10. Remove the fan screws.

11. Remove the fan.

Figure 5-25. Removing the Fan

To replace the fan, reverse the steps.

5-26 Removal and Replacement Procedures

Page 94

5.9 Removing An Optical Disc Bay Device

To remove an Optical Bay device from the Mobile 3500 Expansion Unit, complete the following procedures:

1. Disconnect the computer from the M35EU.

2. Place the M35EU bottom side up, on the table with the front of the unit facing you.

3. Remove the two screws 1 from the Optical Disc Bay retainer cover plate.

4. Remove the cover plate.

5. Slide the Optical Disc Bay device from the connector 2.

6. Remove the Optical Disc Bay device from the expansion unit 3.

Figure 5-26. Removing the Optical Disc Bay Device

Removal and Replacement Procedures 5-27

Page 95

5-28 Removal and Replacement Procedures

Page 96

chapte

SPECIFICATIONS

This chapter provides physical and performance specifications for the following standard components:

■ Computer

■ Displays

■ Hard drives

■ Diskette drive

■ CD-ROM drive

■ Battery packs

■ External power

The chapter also includes:

■ System interrupts

■ System DMA

■ System I/O address

■ System memory map

Specifications 6-1

Page 97

6.1 Computer

)

Table 6-1

Computer Specifications

U.S. Metric

Dimensions (CPU only) Height

Depth Width

Dimensions (CPU M35EU) Height

Depth Width

Dimensions ( M35EU only including tabs Height

Depth Width

Weight (without M35EU)

With 6 cell battery 4.4 lbs. 2.0 kg

Standalone (Battery) Power Requirements

Nominal Operating Voltage (Li-Ion) 10.8 V

Maximum Operating Power (CPU only) 35.0 W Maximum Operating Power (CPU+M35EU) 45.0 W

1.1 in

9.3 in

11.8 in

2.1 in

9.3 in

11.8 in

0.9 in

9.3 in

11.8 in

3.1 cm

23.5 cm

30.0 cm

5.4 cm

23.6 cm

30.0 cm

2.3 cm

23.6 cm

30.0 cm

Integrated AC Power Requirements

Operating Voltage 100 to 240 VAC RMS Operating Current 1.1 A RMS Operating Frequency Range 47 to 63 Hz AC

Maximum Transient 4/50 kV Temperature **

Operating 5 to95°F 10 to 35°C Non-operating -4 to 140°F -20 to 60°C

Relative Humidity (non-condensing)

Operating 10 to 90% Non-operating (t

Altitude

Operating 0 to 10,000 ft 0 to 3.15 km Non-operating 0 to 30,000 ft 0 to 10.14 km

Shoc

Operating 10 G, 11 ms, half sine Non operating 240 G, 2 ms, half sine

Vibration

Operating 0.55 G, 0.25 Oct/Min sweep rate Non-operating 1.5 G, 0.5 Oct/Min sweep rate

Weight is for the computer with 6 cell battery pack and 12.1 inch display panel.

pplicable product safety standards specify thermal limits for plastic surfaces. This

= 38.7°C max) 5 to 90%

computer operates well within the temperature ranges specified.

6-2 Specifications

Page 98

6.2 Displays

Table 6-2

12.1-Inch CTFT, SVGA Display

U.S. Metric

Dimensions Height

Width

Number of Colors 64K Contrast Ratio 100:1 minimum Pixel Resolution

Pitch Format Configuration

Backlight Edge Lit Character Display 80 × 25

13.3-Inch CTFT, XGA Display

Dimensions

Heigh Width 10.6 in 26.9 cm

Number of Colors 64K Contrast Ratio 100: 1 minimum Pixel Resolution

Pitch Format Configuration

Backlight Edge Lit Character Display 80 × 25

7.24 in

9.7 in

0.30 × 0.30 mm 800 × 600 RGB Stripe

Table 6-3

U.S. Metric

7.9 in 20.1 cm

0.29 x 0.29 mm 1024 x 768 RGB Stripe

18.4 cm

24.6 cm

Specifications 6-3

Page 99

6.3 Hard Drives

Table 6-4

Hard Drive Specifications

Standard Model Configurations 4-GB 6-GB

Formatted Capacity per Drive Logical 4,099,866,624 6,495,068,160 Drive Type 65 65 Drive Height Without frame (mm) 12.5 12.5 With frame (mm) 12.7 12.7 Drive Size Inches 2.75 x 3.94 2.75 x 3.94 Millimeters 100.2 x 69.85 100.1 x 69.9 Transfer Rate Media (Mb/s) 51.7 to 83.4 67.5 to 111.9 Interface (Mb/s) 16.6 16.6 Sector Interleave 1:1 1:1 Typical Seek Time (Including setting) Single Track (ms) 4 3 Average (ms) 13 (READ) 13 (READ) Full Stroke (ms) 23 (READ) 25 (READ) Disk Rotational Speed (RPM) 4009 4200 Physical Configuration Cylinders 6975 8960 Data Heads 6 6 Sectors/Track 114 to 240 178 to 294 Bytes/Sector 512 512 Logical Configuration Cylinders 7944 13,424 Heads 16 15 Sectors per Track 63 63 Bytes per Sector 512 512 Buffer Size (kB) 512 512

6-4 Specifications

Page 100

6.4 Diskette Drive

Table 6-5

Diskette Drive Specifications

Diskette size 3.5-inch

High density 1.44-MB/1.2-MB Low density 720 KB

Light None Height 0.43-in (11 mm) Bytes per sector 512 Sectors per Trac

High density 18 (1.44-MB)/15 (1.2-MB) Low density 9

Tracks per Side

High density 80 (1.44-MB)/80 (1.2-MB) Low density 80

Read/Write heads 2 Average Seek Times

Track-to-Track (high/low) 3 ms/6 ms Average (high/low) 94 ms/174 ms Settling Time 15 ms Latency Average 100 ms

Specifications 6-5