Dell Precision 360 Service Manual
Before You Begin
This section provides essential information before starting any service procedures on the Dell Precision 360 computer.
Notes, Notices, and Cautions
NOTE: Indicates important information for better computer usage.
NOTICE: Indicates potential hardware damage or data loss and provides instructions to avoid the problem.
CAUTION: Indicates a potential for property damage, personal injury, or death.
Abbreviations and Acronyms
For a complete list, refer to the "Glossary" in your User's Guide. For removing or replacing other Dell Precision Workstation 360 components, consult the Dell Precision Workstation 360 User's Guide.
© 2003 Dell Computer Corporation. All rights reserved. Reproduction without written permission from Dell Computer Corporation is strictly forbidden. Trademarks: Dell, the DELL logo, and Dell Precision are trademarks of Dell Computer Corporation. Other trademarks and trade names belong to their respective entities.
Models: WML and WMF, April 2003 Rev. A00
Recommended Tools
While the computer is largely tool-less, some procedures require specific tools:
- Small flat-blade screwdriver
- #1 and #2 Phillips-head screwdrivers
- An 8-inch, #2 Phillips-head screwdriver
Precautionary Measures
Follow these safety guidelines to protect your computer and ensure personal safety:
CAUTION: Before starting any procedure, follow the safety instructions in the System Information Guide.
CAUTION: Do not attempt self-service beyond instructions provided by Dell in online documentation or other official materials.
NOTICE: To prevent system board damage, wait 5 seconds after powering off and unplugging the computer before removing components or disconnecting devices.
- Shut down the computer via the Start menu.
- Ensure the computer and attached devices are turned off.
- Disconnect any telephone or telecommunication lines.
- Unplug the computer and all attached devices from electrical outlets, then press the power button to ground the system board.
Additional safety guidelines:
- When disconnecting cables, pull on the connector or strain-relief loop, not the cable itself. For cables with locking tabs, press the tabs before disconnecting. Keep connectors aligned to avoid bending pins. Ensure correct orientation and alignment before connecting cables.
- Handle components and cards carefully. Avoid touching components or contacts. Hold cards by their edges or metal brackets. Hold components like microprocessors by their edges, not pins.
Protecting Against Electrostatic Discharge (ESD)
Static electricity can damage sensitive internal components. To prevent ESD:
- Discharge static electricity from your body by touching an unpainted metal surface on the computer chassis before touching any electronic components. Periodically touch an unpainted metal surface while working inside the computer.
- When unpacking static-sensitive components, keep them in their antistatic packaging until ready for installation. Discharge static electricity before unwrapping.
- Transport sensitive components in antistatic containers or packaging.
- Work in a static-safe area, using antistatic floor pads and workbench pads if available.
Inside Your Computer
This section details the internal components of the Dell Precision 360.
Mini-Tower Computer Components
The following diagram illustrates the internal layout of the mini-tower model:
| Label | Component |
|---|---|
| 1 | Hard drive |
| 2 | Internal speaker (optional) |
| 3 | Chassis intrusion switch |
| 4 | System board |
| 5 | Padlock ring |
| 6 | Heat sink and blower assembly |
| 7 | Power supply |
| 8 | Floppy drive (optional) |
| 9 | CD/DVD drive |
Desktop Computer Components
The following diagram illustrates the internal layout of the desktop model:
| Label | Component |
|---|---|
| 1 | CD/DVD drive |
| 2 | Floppy drive |
| 3 | Hard drive |
| 4 | System board |
| 5 | Padlock ring |
| 6 | Microprocessor airflow shroud |
| 7 | Security cable slot |
| 8 | Power supply |
| 9 | Chassis intrusion switch |
Cable Colors - Mini-Tower and Desktop Computers
Cable identification for drives and panels:
| Device | Cable Color |
|---|---|
| Hard drive | Blue pull tab |
| Floppy drive | Black pull tab |
| CD/DVD drive | Orange pull tab |
| I/O panel | Yellow pull tab |
System Board Components
The following diagram identifies components on the system board:
| Label | Component |
|---|---|
| 1 | Floppy-drive connector (FDD) |
| 2 | Secondary-drive connector (SEC_IDE) |
| 3 | Hard-drive connector (IDE1) |
| 4 | Battery socket (BATTERY) |
| 5 | Password jumper (PASSWORD) |
| 6 | SCSI LED header (SCSI_LED) |
| 7 | Front-panel connector (FRONT_PANEL) |
| 8 | Standby power light (PWR_LED) |
| 9 | Internal speaker (SPKR) |
| 10 | Clear CMOS jumper (CMOS) |
| 11 | Serial ATA connector (SATA_1) |
| 12 | Front fan (FRONT_FAN) |
| 13 | Serial ATA connector (SATA_0) |
| 14 | AGP card connector (AGP) |
| 15 | PCI card connectors (PCI1, PCI2, PCI3, PCI4) |
| 16 | Front-panel audio cable connector (FP_AUDIO) |
| 17 | Telephony connector (TELE) |
| 18 | CD drive audio cable connector (CD_IN) |
| 19 | Power connector (12V_PWR) |
| 20 | Rear fan connector (REAR_FAN1) |
| 21 | Rear fan connector (REAR_FAN2) |
| 22 | Microprocessor and heat-sink connector (CPU_0 PIN_#A1) |
| 23 | Microprocessor fan connector (CPU_FAN) |
| 24 | Memory module connectors (1,3) |
| 25 | Power connector (PWR) |
| 26 | Memory module connectors (2,4) |
Jumper Settings
NOTICE: Ensure the computer is off and unplugged before changing jumper settings to avoid damage or unpredictable results.
To change a jumper setting, pull the plug off its pin(s) and carefully place it onto the desired pin(s).
| Jumper | Setting | Description |
|---|---|---|
| PSWD | 1-2 (default) | Password features are enabled. |
| 2-3 | Password features are disabled. | |
| CLR CMOS | 1-2 (default) | Clears the CMOS settings. |
| 2-3 | Normal CMOS function. |
The diagram shows jumper settings for J8H3 and CLR CMOS.
Front Panel
This section covers the removal and replacement of the front panel.
Removing the Front Panel - Mini-Tower Computer
- Remove the top and bottom panels by releasing the eight tabs on each panel.
- Release the three tabs on the front bezel (one near the CD drive, two near the I/O panel).
- Close the cover and remove the front bezel.
- Remove the screw securing the control panel to the computer, then remove the control panel.
Removing the Front Panel - Desktop Computer
- Disconnect and remove all disk drives.
- Release the front panel by pressing each of the seven front-panel release tabs.
- Close the computer cover halfway and pull the front panel away from the computer.
Replacing the Front Panel
Perform the removal procedures in reverse order.
I/O Panel
This section details the I/O panel components and procedures for removal and replacement.
I/O Panel Components - Mini-Tower Computer
| Label | Component |
|---|---|
| 1 | Control-panel connector |
| 2 | Chassis-intrusion switch connector |
| 3 | Front-panel connector |
| 4 | Speaker connector |
| 5 | USB 2.0 connectors (2) |
| 6 | Headphone connector |
| 7 | Audio connector |
I/O Panel Components - Desktop Computer
| Label | Component |
|---|---|
| 1 | Chassis-intrusion switch connector |
| 2 | Speaker connector |
| 3 | Audio connector |
| 4 | Front-panel connector |
| 5 | Control-panel connector |
| 6 | Headphone connector |
| 7 | USB 2.0 connector |
| 8 | USB 2.0 connector |
| 9 | Diagnostic lights (4) |
Removing the I/O Panel
- Remove the front panel.
- Disconnect all cables connected to the I/O panel, noting the routing of the control panel cable.
- From inside the computer cover, remove the mounting screw securing the I/O panel.
- Remove the I/O panel from the computer.
Replacing the I/O Panel
Follow the removal procedures in reverse order.
Control Panel
This section describes the control panel components and their removal/replacement.
Control-Panel Components - Mini-Tower Computer
| Label | Component |
|---|---|
| 1 | Control-panel connector |
| 2 | Alignment hole |
| 3 | Hard-drive access light |
| 4 | Power button |
| 5 | Power light |
| 6 | Screw hole |
Control-Panel Components - Desktop Computer
| Label | Component |
|---|---|
| 1 | Hard-drive access light |
| 2 | Power button |
| 3 | Screw hole |
| 4 | Alignment hole |
| 5 | Control-panel connector |
| 6 | Power light |
Removing the Control Panel
- Remove the front panel.
- Disconnect the control-panel cable from the I/O panel connector.
- Disconnect the I/O panel cable from the system board connector.
- Remove the mounting screw from the control panel.
- Lift the control panel away from the computer.
Replacing the Control Panel
Follow the removal procedure in reverse order, ensuring all panel tabs are secure.
Chassis Intrusion Switch
This section covers the removal, resetting, and replacement of the chassis intrusion switch.
Removing the Chassis Intrusion Switch
- Disconnect the chassis intrusion switch cable from the control panel. Note the cable routing.
- Slide the chassis intrusion switch out of its slot and remove it with its cable.
Resetting the Chassis Intrusion Detector
- Enter system setup by pressing
F2during the computer's POST. - Under the System Security tab, select the Chassis Intrusion option. Change the setting to Enabled, Enabled-Silent, or Disabled. (Default is Enabled-Silent).
- Press
Alt+Bto restart the computer and apply changes.
NOTE: If a setup password is set, contact the network administrator for assistance.
Replacing the Chassis Intrusion Switch
Perform the removal procedure in reverse order.
Power Supply
This section details the removal and replacement of the power supply unit.
Removing the Power Supply
- Disconnect the DC power cables from the system board and drives. Note cable routing.
- Remove the two screws attaching the power supply to the computer frame.
- On the mini-tower computer, press the release button on the computer frame floor.
- Slide the power supply toward the front of the computer approximately 1 inch.
- Lift the power supply up and out of the computer.
Replacing the Power Supply
- Slide the power supply into place.
- Replace the two screws securing the power supply.
- Reconnect the DC power cables, ensuring proper routing under tabs.
- Close the computer cover.
- Connect power cables and turn on the computer.
System Board
This section provides instructions for removing and replacing the system board.
Removing the System Board
- Remove any components obstructing access to the system board.
- Disconnect all cables from the system board.
- Visually compare the replacement system board with the existing one to ensure correctness.
- Pull up on the tab, slide the system board assembly toward the front, and lift it out.
- Place the removed assembly next to the replacement board for reference.
Replacing the System Board
- Transfer components from the existing board to the replacement board:
- Remove and install memory modules.
- Remove the heat-sink assembly and microprocessor and transfer them to the replacement board.
- Configure the settings of the replacement system board.
- Set jumpers on the replacement board to match the existing board.
- Orient the replacement board by aligning notches with chassis tabs.
- Slide the system board assembly toward the back until it clicks into place.
- Replace all removed components and cables.
