Dell C521 specifications Installing the Fan Assembly, Removing the System Board

Page 30

CAUTION: The heat-sink assembly can get very hot during normal operation. Be sure that the assembly has had sufficient time to cool before you touch it.

4. Disconnect the fan power cable from the FAN_CPU1 connector on the system board. See System Board Components.

1 fan tabs (2)

2 fan release lever

3 fan cable connector

4fan assembly

5.While pressing the fan release lever, rotate the fan assembly toward the back of the computer and up to release the two fan tabs from the vent holes in the chassis.

6.Remove the fan assembly from the computer.

Installing the Fan Assembly

When reinstalling the fan, ensure that you do not pinch any wires that run near the fan.

NOTICE: Ensure that the two fan tabs are fully inserted into the keyhole slots in the chassis so that the fan can slide back fully into position. Ensure that the fan release lever is seated into its slot in the chassis.

1.Lower the fan assembly into the chassis and align the two fan tabs with the vent holes in the chassis.

2.Rotate the fan assembly toward the front of the computer until the fan release lever snaps into place.

3.Connect the fan assembly cable to the FAN_CPU1 connector on the system board. See System Board Components.

4.Install the front I/O panel. See Installing the Front I/O Panel.

5.Replace the computer cover. See Replacing the Computer Cover.

6.Connect your computer and devices to electrical outlets, and turn them on.

System Board

Removing the System Board

1. Follow the procedures in Before You Begin.

NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.

2.Remove the computer cover. See Removing the Computer Cover.

3.Remove any components that restrict access to the system board (CD/DVD drive(s), floppy drive, hard drive, power supply).

4.Remove any expansion cards that are installed. See Removing an Expansion Card.

Image 30
Contents September 2006 Rev. A00 About Your Computer Front ViewBack Panel I/O Connectors Back View of the ComputerBack to Contents Recommended Tools Before You BeginGetting Started Turning Off Your ComputerPage Replacing the Computer Cover Removing the Computer Cover Removing and Installing Parts MemoryDDR2 Memory Overview Installing Memory Cards Removing MemoryInstalling an Expansion Card Removing an Expansion Card Drives Power Cable Connector General Installation GuidelinesDrive Interface Connectors Connecting and Disconnecting Drive CablesInstalling a CD/DVD Drive CD/DVD DriveRemoving a CD/DVD Drive Floppy Drive Removing a Floppy DriveInstalling a Floppy Drive Media Card Reader Removing a Media Card ReaderInstalling a Media Card Reader Hard Drive Removing a Hard DriveInstalling a Hard Drive Battery Replacing the BatteryProcessor Removing the ProcessorInstalling the Processor Page Power Supply Replacing the Power SupplyFront I/O Panel Removing the Front I/O PanelFan Assembly Installing the Front I/O PanelRemoving the Fan Assembly Installing the Fan Assembly System BoardRemoving the System Board Replacing the System Board Page Specifications Connectors DrivesControls and Lights Power PhysicalEnvironmental Overview System SetupEntering System Setup OverviewSystem Setup Options System64MB Boot Menu Post BehaviorClearing Forgotten Passwords and Cmos Settings Jumper Locations Clearing Password SettingsFlashing the Bios Clearing Cmos SettingsTechnical Overview Inside View of Your ComputerSystem Board Components Jumper Settings Jumper Setting DescriptionPower Supply DC Connector Pin Assignments DC Power Connector P1Pin Number Signal name AWG Wire DC Power Connector P4 DC Power Connector P2DC Power Connector P3 DC Power Connector P5 and P6Black +12 VDC Yellow September 2006 Rev. A00 When to Use the Dell Diagnostics TroubleshootingDell Diagnostics Dell Diagnostics Main MenuProblem Description Suggested Resolution Diagnostic LightsPower Light Problem Description Suggested Resolution System LightsBeep Codes Code Cause