Dell OptiPlex GX50 Systems Service Manual
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Dell OptiPlex GX50 Systems Service Manual

Dell OptiPlex GX50 Systems Service Manual

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See also: User Manual
Dell™ OptiPlex™ GX50 Systems
Before You Begin
Computer Cover
Inside the Computer
Chassis Intrusion Switch
Front-Panel Inserts
Control Panel and Badge
I/O Panel
Drives
Expansion-Card Cage (Small Desktop Computer Only)
Expansion Card
Memory
Microprocessor
Power Supply
System Board
Hints, Notices, and Cautions
HINT:
A HINT indicates important information that helps you make better use of your computer.
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 potential for property damage, personal injury, or death.
Information in this document is subject to change without notice.
© 2002 Dell Computer Corporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, and OptiPlex 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.
January 2002 Rev A02

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Summary of Contents for Dell OptiPlex GX50 Systems

  • Page 1 Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden. Trademarks used in this text: Dell, the DELL logo, and OptiPlex are trademarks of Dell Computer Corporation; Microsoft, MS-DOS, and Windows NT are registered trademarks of Microsoft Corporation.

  • Page 2: Before You Begin

    Precautionary Measures Getting Started This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell™ OptiPlex™ GX50 computers. Unless otherwise noted, each procedure assumes that the following conditions exist: You have performed the steps in "Precautionary...
  • Page 3 In addition, take note of the following safety guideline when appropriate: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by it edges or by its metal mounting bracket. Hold a component such as a microprocessor by its edges, not by its pins. Back to Contents Page...

  • Page 4: Opening The Computer Cover

    Back to Contents Page Computer Cover Dell™ OptiPlex™ GX50 Systems Opening the Computer Cover Closing the Computer Cover Opening the Computer Cover NOTE: If your computer is on a stand, remove the stand before you open the computer cover. Small Form-Factor Computer...
  • Page 5 1 Security cable slot 2 Padlock ring 3 Release buttons (one on each side) Small Mini-Tower Computer 1 Release buttons (one on each side) 2 Padlock ring 3 Security cable slot 1. Remove the padlock from the padlock ring, if present.

  • Page 6: Closing The Computer Cover

    NOTICE: Do not open the cover if the computer is on the edge of a desk or table. Doing so may cause the computer to tip over and fall. Make sure that the computer is situated so that there is at least 12 inches of desk- or table-top for the cover to rest on.

  • Page 7: Inside The Computer

    Back to Contents Page Inside the Computer Dell™ OptiPlex™ GX50 Systems Key Components Computer Cables Key Components Inside the Small Form-Factor Computer 1 Hard drive System board 2 3.5-inch floppy drive Power supply 3 CD drive AC power connector 4 Cover release buttons (2) 10 I/O ports and connectors...
  • Page 8 1 Cover release buttons (2) 8 AC power connector 2 Hard drive Padlock ring 3 Internal speaker 10 I/O ports and connectors 4 Chassis intrusion switch 11 Heat sink assembly 5 Expansion-card cage 12 System board 6 Power supply 13 3.5-inch floppy drive 7 Expansion-card slots 14 CD drive Inside the Small Mini-Tower Computer...

  • Page 9: Computer Cables

    1 Cover release buttons (2) 8 AC power connector 2 Hard drive Padlock ring 3 Internal speaker 10 Microprocessor and airflow shroud 4 Chassis intrusion switch 11 Power supply 5 System board 12 3.5-inch floppy drive 6 Expansion-card slots 13 CD drive 7 I/O ports and connectors Computer Cables Small Form-Factor Computer...
  • Page 10 1 CD drive data cable 6 IDE data cable (hard drive) 2 Floppy drive data cable 7 Input/output cable 3 Control panel cable 8 Input/output audio cable 4 CD drive power cable 9 CD audio cable 5 IDE drive power cable (hard drive) Small Desktop Computer...
  • Page 11 1 CD drive audio cable 5 Front I/O cable 2 CD drive data cable 6 Front I/O audio cable 3 3.5-inch floppy drive data cable 7 EIDE interface cable (hard drive) 4 Control panel cable Small Mini-Tower Computer...
  • Page 12 1 CD drive audio cable 6 Hard drive power cable 2 CD drive power cable 7 Hard drive data cable 3 CD drive data cable 8 Front I/O cable 4 Floppy drive data cable 9 Front I/O audio cable 5 Floppy drive power cable Cable Colors Hard drive Blue pull tab...

  • Page 13: Removing The Chassis Intrusion Switch

    Back to Contents Page Chassis Intrusion Switch Dell™ OptiPlex™ GX50 Systems Removing the Chassis Intrusion Switch Replacing the Chassis Intrusion Switch Resetting the Chassis Intrusion Detector Removing the Chassis Intrusion Switch Small Form-Factor Computer Small Desktop Computer...
  • Page 14 Small Mini-Tower Computer 1. Disconnect the chassis intrusion switch cable connector from the front I/O panel. Note the routing of the chassis intrusion cable as you remove it from the chassis. Chassis hooks may hold the cable in place inside the chassis.

  • Page 15: Replacing The Chassis Intrusion Switch

    2. Slide the chassis intrusion switch out of its slot and remove the switch and its attached cable from the chassis. Replacing the Chassis Intrusion Switch To replace the chassis intrusion switch, follow the "Removing the Chassis Intrusion Switch" procedures in reverse order. Resetting the Chassis Intrusion Detector 1.

  • Page 16: Removing Front-Panel Inserts

    Back to Contents Page Front-Panel Inserts Dell™ OptiPlex™ GX50 Systems Removing Front-Panel Inserts Replacing Front-Panel Inserts Removing Front-Panel Inserts 1. On the small form-factor and small desktop computers, perform the following steps: a. Face the front of the computer and use your fingers to remove the front-panel cover.
  • Page 17 Small Desktop Computer...

  • Page 18: Replacing Front-Panel Inserts

    Small Mini-Tower Computer Replacing Front-Panel Inserts To replace a front-panel insert, follow the appropriate procedure, in reverse, in "Removing Front-Panel Inserts." Back to Contents Page...
  • Page 19 Back to Contents Page Control Panel and Badge Dell™ OptiPlex™ GX50 Systems Removing the Control Panel and Badge Replacing the Control Panel and Badge Removing the Control Panel and Badge Small Form-Factor Desktop Computer 1. Open the computer cover. 2. Using a flat-blade screwdriver, release the tabs from the inside of the computer and remove the plastic computer cover from the metal component.

  • Page 20: Small Desktop Computer

    4. To remove the control panel, perform the following steps: Removing the Control Panel—Small Form-Factor Computer a. Remove the metal control-panel shield. b. Remove the screw that holds the control panel to the computer. Small Desktop Computer 1. To remove the badge, open the front USB door. a.
  • Page 21 b. Using an 8-inch #2 Phillips screwdriver, remove the screw holding the control panel to the computer, and pull the panel up and away from the computer. Small Mini-Tower Computer 1. To remove the badge, open the front USB door. a.
  • Page 22 1 Top panel 2 Bottom panel 3 Front-panel tabs (3) 4 Top-panel tabs (8) d. Close the cover and remove the front bezel. Control-Panel Removal...
  • Page 23 e. Remove the screw holding the control panel to the chassis, and pull the panel up and away from the chassis. Replacing the Control Panel and Badge Small Form-Factor Desktop Computer 1. Replace the control panel and the control-panel shield. 2.
  • Page 24 1 Metal hooks (2) To help replace the plastic computer cover, remove the accent door and front mask from the plastic computer cover: a. Remove the front mask by releasing the tabs on the inside of the plastic computer cover. b.
  • Page 25 1 Accent door 2 Front mask 3. Replace the badge by following, in reverse order, the procedures in "Removing the Control Panel and Badge" for the small form-factor desktop computer. Small Desktop Computer 1. Replace the control panel and secure it to the computer by replacing the screw you removed in step 2 of the removal procedure.

  • Page 27: Removing The I/O Panel

    Back to Contents Page I/O Panel Dell™ OptiPlex™ GX50 Systems Removing the I/O Panel Replacing the I/O Panel Removing the I/O Panel Small Form-Factor Desktop Computer 1. To access the screw that holds the I/O panel to the computer, remove the hard drive.
  • Page 28 4. From inside the computer cover, remove the mounting screw that secures the I/O panel to the computer. 5. Remove the I/O panel from the computer. Small Desktop Computer Remove the hard-drive shroud. 2. Disconnect the hard-drive data cable. 3. Disconnect the control-panel cable from the control-panel connector on the I/O panel. Disconnect the I/O cable from the I/O panel.

  • Page 29: Replacing The I/O Panel

    Small Mini-Tower Computer I/O Panel Removal—Small Mini-Tower Computer 1 Internal speaker cable 2 Chassis intrusion switch cable 3 Mounting screw 4 Control-panel cable 5 Front audio cable 6 I/O cable 1. Disconnect the control-panel cable from the control-panel connector on the I/O panel. Disconnect the I/O cable from the I/O panel.
  • Page 30 To replace the I/O panel, follow the removal procedures in reverse. Back to Contents Page...
  • Page 31 Back to Contents Page Drives Dell™ OptiPlex™ GX50 Systems Floppy Drive Removal Floppy Drive Replacement CD Drive Removal CD Drive Replacement Hard Drive Removal Hard Drive Replacement Floppy Drive Removal Small Form-Factor Desktop Computer 1. Disconnect the floppy-drive cable from the system board.
  • Page 32 1 Floppy-drive cable 2 Tab 3 Interposer board 4 System board floppy-drive connector (DSKT) b. To release the floppy-drive cable from the connector, slide the lever until it is fully extended, and then lift the cable away. Removing the Floppy-Drive Cable...
  • Page 33 1 Floppy-drive cable 2 Lever 5. Remove the floppy drive from its sled by pulling the sled tab out while pushing the drive up and then sliding the drive out of the sled. Removing the Floppy Drive—Small Form-Factor Computer...

  • Page 34: Small Desktop And Small Mini-Tower Computers

    1 Sled tab 2 Sled Small Desktop and Small Mini-Tower Computers 1. Disconnect the cables from the floppy drive and system board. Small Desktop Computer...
  • Page 35 1 Power cable 2 Floppy-drive cable 3 Floppy-drive system board connector Small Mini-Tower Computer 1 Power cable 2 Floppy-drive cable 3 Floppy-drive system board connector...

  • Page 36: Floppy Drive Replacement

    2. Press inward on the two tabs on the sides of the drive bay to disengage the drive from the computer. 3. Slide the drive upward and remove it from the computer. Small Desktop Computer Small Mini-Tower Computer Floppy Drive Replacement Small Form-Factor Desktop Computer 1.
  • Page 37 8. Enter system setup and update the appropriate Diskette Drive A option to reflect the size and capacity of your new floppy drive. 9. Verify that your computer works correctly by running the Dell Diagnostics. Small Desktop and Mini-Tower Computers 1.
  • Page 38 Floppy Drive Bracket Rails 1 Drive 2 Bracket rails (2) 3 Screws (4) 2. Gently slide the drive into place until the tabs securely click into position. 3. Attach the power and data cables to the floppy drive, and connect the other end of the data cable to the connector labeled "DSKT"...
  • Page 39 6. Enter system setup and update the appropriate Diskette Drive A option to reflect the size and capacity of your new floppy drive. 7. Verify that your computer works correctly by running the Dell Diagnostics. CD Drive Removal Small Form-Factor Desktop Computer 1.
  • Page 40 1 Interposer board 2. Press inward on the two tabs on the sides of the drive to disengage the drive from the computer. Removing the CD Drive—Small Form-Factor Computer Small Desktop and Small Mini-Tower Computers 1. Remove the data, power, and audio cables from the drive.
  • Page 41 Removing Cables—Small Desktop Computer 1 Power cable 2 Audio cable 3 CD drive cable 4 CD drive connector Removing Cables—Small Mini-Tower Computer...
  • Page 42 1 Power cable 2 Audio cable 3 CD drive cable 4 CD drive connector 2. Press inward on the two tabs on the sides of the drive bay to disengage the drive from the computer. 3. Slide the drive upward and remove it from the computer. Removing the CD Drive—Small Desktop Computer...
  • Page 43 2. If you are installing a new drive, connect it to the set of rails that are attached to the inside of the cover. If a set of rails is not attached to the inside of the cover, contact Dell.
  • Page 44 2. Connect the interposer board to the CD drive, ensuring that the data, power, and audio cables are attached to the interposer board. Connecting the Interposer Board—Small Form-Factor Computer 1 Interposer board Small Desktop and Small Mini-Tower Computers 1. Gently slide the drive into place until the tabs securely click into position. 2.
  • Page 45 1 Power cable 2 Audio cable 3 CD drive cable 4 CD drive connector Small Mini-Tower Computer...

  • Page 46: Hard Drive Removal

    1 Power cable 2 Audio cable 3 CD drive cable 4 CD drive connector If your computer came with an IDE CD drive, use the spare connector on the existing interface cable. Otherwise, use the IDE interface cable provided in the drive kit. 4.
  • Page 47 3. If the replacement drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Drive Brackets Rails Small Desktop Computer 1. Remove the plastic shroud covering the hard drive by pressing in on the indented tab at the top of the shroud and lifting the shroud away.
  • Page 48 2. Disconnect the power and hard-drive data cables from the drive. Removing Cables—Small Desktop Computer 1 Hard-drive cable 2 Power cable 3. Press in on the tabs on each side of the drive and slide it up and out. Removing the Hard Drive—Small Desktop Computer...
  • Page 49 1 Tabs (2) 2 Hard drive 4. If the replacement drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Drive Brackets Rails Small Mini-Tower Computer 1.
  • Page 50 1 Power cable 2 Hard-drive cable 2. Press in on the tabs on each side of the drive and slide it up and out. Removing the Hard Drive—Small Mini-Tower Computer 1 Tabs (2) 2 Hard drive 3. If the replacement drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive.

  • Page 51: Hard Drive Replacement

    Hard Drive Replacement NOTICE: To avoid possibly damaging the drive by ESD, ground yourself by touching an unpainted metal surface on the back of the computer. NOTICE: When you unpack the drive, do not set it on a hard surface, which may damage the drive. Instead, set the drive on a surface, such as a foam pad, that will sufficiently cushion it.
  • Page 52 1 Power cable 2 IDE cable 3 IDE1 connector Connecting Cables—Small Desktop Computer 1 Power cable 2 IDE cable 3 IDE1 connector...
  • Page 53 2 GB or less. For example, a computer with a 2.5-GB hard drive would have a primary partition of 2 GB (drive C) and a second partition of 500 MB (drive D). 12. Test the hard drive by running the Dell Diagnostics.
  • Page 54 See "Solving Problems" in the User's Guide for complete information. 13. If the drive you just installed is the primary drive, install the operating system on the hard drive. For instructions, refer to the documentation that came with the operating system. Back to Contents Page...

  • Page 55: Expansion-Card Cage (Small Desktop Computer Only)

    Back to Contents Page Expansion-Card Cage (Small Desktop Computer Only) Dell™ OptiPlex™ GX50 Systems Removing the Expansion-Card Cage Replacing the Expansion-Card Cage Removing the PCI Riser Board Replacing the PCI Riser Board Removing the Expansion-Card Cage CAUTION: Use a wrist-grounding strap as explained in "Precautionary...

  • Page 56: Removing The Pci Riser Board

    3. Reconnect any cables you removed in steps 1 and 2 of the previous procedure. Removing the PCI Riser Board NOTICE: To avoid damage to the expansion cards or the system board by ESD, ground yourself by touching an unpainted metal surface on the back of the computer. CAUTION: Use a wrist grounding strap as explained in "Precautionary...

  • Page 57: Removing An Expansion Card

    Back to Contents Page Expansion Card Dell™ OptiPlex™ GX50 Systems Removing an Expansion Card Replacing an Expansion Card Your computer provides expansion slots for the following cards: In the small form-factor computer, one low-profile, 32-bit, 33-MHz PCI card. In the small desktop computer, up to two 32-bit, 33-MHz PCI cards.
  • Page 58 1 Card-edge connector 2 Expansion card 3 Hinged lever 4 Retention arm 5 Expansion-card connector Small Desktop Computer...
  • Page 59 1 Retention arm 5 Expansion-card connector 2 Lever 6 Riser board 3 Expansion card 7 Expansion-card cage 4 Card-edge connector Small Mini-Tower Computer 1 Expansion card 2 Card-edge connector 3 Expansion-card connector 4 Retention arm...

  • Page 60: Replacing An Expansion Card

    5 Lever Replacing an Expansion Card CAUTION: Use a wrist-grounding strap as explained in "Precautionary Measures." CAUTION: Some network cards automatically start the computer when they are connected. To guard against electrical shock, be sure to unplug the computer from its electrical outlet before installing any expansion cards.
  • Page 61 1 Card-edge connector 2 Expansion card 3 Riser board 4 Expansion-card connector 5 Expansion-card cage 4. Place the expansion card on the connector and press down firmly. Make sure that the card is fully seated in the slot. If the expansion card is full-length, insert the end of the card into the expansion-card guide bracket as you lower the card toward its connector on the system board.
  • Page 62 1 Bracket within slot 2 Bracket caught outside of slot 3 Fully seated card 4 Not fully seated card Replacing an Expansion Card—Small Mini-Tower Computer 1 Filler bracket 2 Alignment bar 3 Alignment guide 4 Retention arm...
  • Page 63 5. Before lowering the retention arm, make sure of the following: Tops of all expansion cards and filler brackets are flush with the alignment bar. Notch in the top of the card or filler bracket fits around the alignment guide. Press the arm into place, securing the expansion card(s) in the computer.

  • Page 64: Removing A Memory Module

    Back to Contents Page Memory Dell™ OptiPlex™ GX50 Systems Removing a Memory Module Replacing a Memory Module Removing a Memory Module CAUTION: Use a wrist-grounding strap as explained in "Precautionary Measures." 1. Press the securing clips outward simultaneously until the memory module disengages and pops out slightly from the socket.
  • Page 65 Back to Contents Page...
  • Page 66 Back to Contents Page Microprocessor Dell™ OptiPlex™ GX50 Systems Removing the Microprocessor and Cooling Fan/Heat-Sink Assembly Replacing the Microprocessor and Cooling Fan/Heat-Sink Assembly Removing the Microprocessor and Cooling Fan/Heat-Sink Assembly CAUTION: Use a wrist-grounding strap as explained in "Precautionary Measures."...
  • Page 67 a. Remove the memory module closest to the heat-sink assembly. b. Pull down on the toggle clip lever until you can unhook the ends of the clip from the tabs on each side of the ZIF socket. c. Remove the clip from the socket, and then lift the heat sink from the microprocessor. Removing the Securing Clip 1 ZIF socket tab 2 Toggle lever...
  • Page 68 1 Microprocessor chip 2 Release lever 3 Microprocessor socket NOTICE: Be careful not to bend any of the pins when you remove the microprocessor from the ZIF socket. Bending the pins can permanently damage the microprocessor. The ZIF socket has a lever-type handle that secures and releases the microprocessor from the ZIF socket. 5.
  • Page 69 NOTE: If you are installing a microprocessor replacement kit from Dell, return the original heat- sink assembly and microprocessor to Dell in the same package in which your replacement kit was sent. Your microprocessor replacement kit should include a replacement microprocessor heat sink. You need to reuse the original securing clip.
  • Page 70 If a setup password has been assigned by someone else, contact the network administrator for information on resetting the chassis intrusion detector. 12. Run the Dell Diagnostics to verify that the new processor is operating correctly. See the User's Guide for information on Dell Diagnostics.

  • Page 71: Removing The Power Supply

    Back to Contents Page Power Supply Dell™ OptiPlex™ GX50 Systems Removing the Power Supply Replacing the Power Supply Removing the Power Supply Small Form-Factor Computer 1 Release button 2 AC power connector Small Desktop Computer...
  • Page 72 1 Push button 2 DC power cable 3 AC power connector Small Mini-Tower Computer 1 Push button 2 DC power cable 3 AC power connector...

  • Page 73: Replacing The Power Supply

    4 Screws (2) 1. Disconnect the AC power cable from the back of the power supply. 2. Disconnect the DC power cables from the system board and the drives. Note the routing of the DC power cables underneath the clips in the computer as you remove them from the system board and drives.

  • Page 74: System Board Components

    Back to Contents Page System Board Dell™ OptiPlex™ GX50 Systems System Board Components Removing the System Board Replacing the System Board System Board Components Floppy drive connector 13 Front-panel audio connector Battery 14 Video connector (upper) and audio connectors (lower)
  • Page 75 Standby power light 19 Parallel port (upper) and serial port (2)(lower) connectors PCI3 connector 20 Fan connector PCI4 connector 21 Microprocessor and heat sink 10 PCI2 connector 22 Memory module (DIMM) connectors 11 PCI1 connector 23 DC power connector 12 CD audio connector 24 System board speaker System Board Labels Connector or Socket...

  • Page 76: Removing The System Board

    Removing the System Board CAUTION: Before you remove any component from the system board, read the steps in "Precautionary Measures." NOTE: The system board and metal tray are attached and are removed as one piece. 1. Remove any components that restrict access to the system board. 2.

  • Page 77: Replacing The System Board

    5. Place the system board that you just removed next to the replacement system board. Replacing the System Board 1. Transfer components from the existing system board to the replacement system board. 2. Remove the memory modules and install them on the replacement board. CAUTION: The microprocessor package and heat-sink assembly can get hot.
  • Page 78 ALERT! Cover was previously removed. Reset the chassis intrusion detector. Back to Contents Page...

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