Dell OptiPlex G1 User Manual

Contents: Dell OptiPlex GX1 Small-Form-Factor Systems Service Manual

Dell™ OptiPlex™ GX1 Small-Form-Factor Systems Service Manual

Removing and Replacing Parts

Notes, Notices, and Cautions

Throughout this guide, blocks of text may be accompanied by an icon and printed in bold type or in italic type. These blocks are notes, notices, and cautions, and they are used as follows:

NOTE: A NOTE indicates important information that helps you make better use of your system.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden. Trademarks used in this text: Dell, OptiPlex, and the DELL logo are trademarks of Dell Computer Corporation; Microsoft, MS-

DOS, and Windows NT are registered trademarks of Microsoft Corporation. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or

their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own.

Initial release: Jun 1999

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Removing and Replacing Parts: Dell OptiPlex GX1 Systems Service Manual

Back to Contents Page

Removing and Replacing Parts: Dell™ OptiPlex™ GX1 SmallForm-Factor Systems Service Manual

Overview System Power Supply

Recommended Tools Riser Board

Precautionary Measures System Board Components

Internal Views Expansion-Card Cage

Computer Cover Expansion Cards

Eject and Power Buttons DIMMs

Control Panel Microprocessor/Heat Sink Assembly

Chassis Intrusion Switch System Battery

Drives System Board

Overview

This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell OptiPlex small-form-factor chassis GX1 system.

Unless otherwise noted, each procedure assumes that the following conditions exist:

You have performed the steps in "Precautionary Measures." You have removed the computer cover. You can replace or reinstall a part by performing the removal procedure in reverse order unless

additional information is provided.

Recommended Tools

Most of the procedures in this manual require the use of one or more of the following tools:

#1 and #2 Phillips-head screwdrivers 1/4-inch nut driver

Also, use a wrist grounding strap as explained in "Precautionary Measures

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Precautionary Measures

Before you perform any procedures in this manual, take a few moments to read the following caution for your personal safety and to prevent damage to the system from ESD.

CAUTION: FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the system, perform the following steps in the sequence listed:

1. Turn off the computer and all peripherals.

2. Disconnect the computer and peripherals from their AC power sources. Also, disconnect any

telephone or telecommunication lines from the computer. Doing so reduces the potential for personal injury or shock.

3. If you are disconnecting a peripheral from the computer or are removing a component from the system board, wait 10 to 20 seconds after disconnecting the computer from AC power before disconnecting the peripheral or removing the component to avoid possible damage to the system board.

4. Wear a wrist grounding strap, and clip it to an unpainted metal surface, such as the padlock loop on the back of the chassis. If a wrist grounding strap is not available, touch any unpainted metal surface on the back of the computer or on the computer chassis, such as the power supply, to discharge any static charge from your body before touching anything inside the computer. While you work, periodically touch an unpainted metal surface on the computer chassis to dissipate any static electricity that might harm internal components. Also avoid touching components or contacts on a card and avoid touching pins on a chip.

5. Verify that the auxiliary power indicator on the riser board is not on. If it is on, you may need to wait 10 to 30 seconds for it to go out (see Figure 20

Internal Views

Figure 1 shows a top view of the chassis to help you orient yourself when you work inside the computer.

Figure 1. Orientation View

1 System board 2 Diskette drive 3 Hard-disk drive 4 CD-ROM drive 5 Power supply

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Removing and Replacing Parts: Dell OptiPlex GX1 Systems Service Manual

Figure 2 shows the chassis with the cover removed.

Figure 2. Inside the Chassis

1 CD-ROM drive interface cable 2 Externally accessible upper drive

bay

3 Hard-disk drive 4 Diskette-drive interface cable 5 Hard-disk drive interface cable 6 Expansion-card cage 7 System board 8 Expansion-card slots

9 I/O ports and connectors 10 AC power receptacle 11 Security cable slot 12 Power supply 13 Chassis intrusion switch

Computer Cover

Figure 3. Computer Cover Removal

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Removing and Replacing Parts: Dell OptiPlex GX1 Systems Service Manual

To remove the computer cover, perform the following steps:

1. Be sure the padlock ring is pushed into the cover.

2. Press in on the two securing buttons until the cover is free to swing up (see Figure 3).

3. Raise the back of the cover, and pivot it toward the front of the computer.

4. Lift the cover off the hooks at the front of the chassis.

5. Disengage the tabs that secure the cover to the top of the chassis, and lift the cover away.

Figure 4. Computer Cover Replacement

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Removing and Replacing Parts: Dell OptiPlex GX1 Systems Service Manual

To replace the computer cover, perform the following steps:

1. Face the front of the computer and hold the cover at a slight angle (see Figure 4).

2. Align the bottom of the cover with the bottom of the chassis and insert the hooks on the cover into the recessed slots on the computer chassis so that the tabs catch the hooks inside the slots.

3. Pivot the cover down toward the back of the chassis and into position. Make sure that the securing buttons click into place.

Eject and Power Buttons

Figure 5. Eject and Power Button Removal

1 Diskette eject button 2 Power button

To remove the eject and power buttons, perform the following steps:

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Removing and Replacing Parts: Dell OptiPlex GX1 Systems Service Manual

1. Lay the computer cover on a flat work surface, with the inside of the top cover facing up.

2. To remove the 3.5-inch diskette-drive eject button, pull gently on the plastic part of the button until it comes free.

3. To remove the power button, use a small screwdriver and push in the two plastic clips that hold the button to the bezel. When these clips are released, the button and the spring come free from the bezel.

Control Panel

Figure 6. Control Panel Removal

1 Screw 2 Control panel

To remove the control panel, perform the following steps:

1. Remove the drive shelf

2. Remove the power supply.

3. Disconnect the control panel cable from the control panel connector on the system board (see "System

Board Labels" for the location of the PANEL connector).

Note the routing of the control panel cable as you remove it from the chassis.

4. Remove the mounting screw that secures the control panel to the chassis.

5. Disconnect the chassis intrusion switch cable connector from the control panel.

6. Remove the control panel cable.

7. Remove the control panel from the chassis. Note the routing of the control panel cable as you remove it from the chassis.

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When you install the replacement control panel, be sure to put the right side of the control panel behind the

mounting tab.

Chassis Intrusion Switch

Figure 7. Chassis Intrusion Switch Removal

1 Control panel 2 Chassis intrusion

switch

To remove the chassis intrusion switch, perform the following steps:

1. Remove the drive shelf

2. Remove the power supply.

3. Remove the control panel.

4. Disconnect the chassis intrusion switch cable connector from the control panel. Note the routing of the chassis intrusion cable as you remove the cable from the chassis. Chassis

hooks may hold the cable in place inside the chassis.

5. Slide the chassis intrusion switch out of its slot and remove the switch and its attached cable from the chassis.

6. Install the replacement chassis intrusion switch and cable.

7. To reset the chassis intrusion detector, enter the System Setup program and reset Chassis Intrusion to Not Detected (see your online System User's Guide for instructions).

Drives

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NOTE: In all of the following procedures, left and right refer to your left and right as you face the front of the computer.

Figure 8. Drive Locations

1 Chassis intrusion switch 2 CD-ROM drive 3 3.5-inch diskette drive 4 Hard-disk drive

Preliminary Steps

You must remove the drive shelf before removing the 3.5-inch diskette drive, the CD-ROM drive, the harddisk drive, the control panel, the chassis intrusion switch, or the power supply.

Figure 9. Drive Shelf Removal

1 Drive shelf 2 Release tabs (2)

To remove the drive shelf from the chassis, perform the following steps:

1. Disconnect the power and interface cables from the diskette drive and CD-ROM drive.

2. Press inward on the two drive shelf release tabs, and pull the shelf forward and out of the chassis (see

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