Dell E521 Power Supply DC Connector Pin Assignments, Pin Number Signal name AWG Wire

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1

fan connector

2

processor socket (CPU)

3

memory module connectors

 

 

(FAN_CPU1)

 

 

 

(DIMM_1, DIMM_2, DIMM_3,

 

 

 

 

 

 

DIMM_4)

 

 

 

 

 

 

 

 

4

power connector

5

serial ATA drive

6

serial ATA drive connectors

 

 

(PW_12V_A1)

 

connectors (SATA2,

 

(SATA0, SATA1)

 

 

 

 

SATA3)

 

 

 

7

front-panel

8

power connector

9

line-in, line-out, microphone, side

 

 

connector

 

(POWER1)

 

surround, center, and LFE

 

 

(FRONTPANEL)

 

 

 

connectors (AUDIO_6_STACK)

 

 

 

 

 

 

 

 

10

USB connectors (2)

11

network connector and

12

real-time clock reset jumper

 

 

(USB2_BACK1)

 

USB connectors (2)

 

(RTCRST)

 

 

 

 

(NIC_USB1)

 

 

 

 

 

 

 

 

 

 

13

video connector

14

battery socket (BT1)

15

Internal USB connector (USB1)

 

 

(VIDEO1)

 

 

 

 

 

 

 

 

 

 

 

 

16

PCI Express x16

17

standby power indicator

18

PCI Express x1 connector

 

 

connector (SLOT1)

 

(AUX_PWR_LED)

 

(SLOT2)

 

 

 

 

 

 

 

 

19

PCI connector

20

PCI connector (SLOT4)

21

password jumper (PSWD)

 

 

(SLOT3)

 

 

 

 

 

22

floppy drive

 

 

 

 

 

 

connector

 

 

 

 

 

 

(FLOPPY1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Supply DC Connector Pin Assignments

DC Power Connector P1

Pin Number

Signal name

18-AWG Wire

 

 

 

1

+3.3 VDC

Orange

 

 

 

2

+3.3 VDC

Orange

 

 

 

3

GND

Black

 

 

 

4

+5 VDC

Red

 

 

 

5

GND

Black

 

 

 

6

+5 VDC

Red

 

 

 

Image 61
Contents Model Dcsm Front View of the Computer About Your ComputerBack View of the Computer Back Panel ConnectorsBack to Contents Power Lights Advanced TroubleshootingDiagnostic Lights Light Pattern Problem Description Suggested ResolutionSystem Messages Beep CodesCode Cause Diskette read failure Click the Change or Remove Program iconStarting the Dell Diagnostics Dell DiagnosticsWhat Is a Driver? Dell Diagnostics Main MenuDrivers Identifying DriversUsing Windows XP Device Driver Rollback Reinstalling DriversManually Reinstalling Drivers Windows XPClick Start, then click Help and Support Resolving Software and Hardware IncompatibilitiesGetting Started Before You BeginRecommended Tools Turning Off Your ComputerBack to Contents Removing the Computer Cover Removing and Installing PartsMemory Memory Installation GuidelinesInstalling Memory Addressing Memory With 4-GB ConfigurationsRemoving Memory CardsPCI Cards Installing a PCI CardPage Removing a PCI Card PCI Express Cards Installing a PCI Express CardPage Removing a PCI Express Card Removing the Drive Panel Drive PanelInstalling the Drive Panel Installing the Drive-Panel InsertRemoving the Drive-Panel Insert Drives Connecting Drive CablesConnecting and Disconnecting Drive Cables Drive Interface ConnectorsHard Drive Removing a Hard Drive Installing a Hard DrivePage Adding a Second Hard Drive Floppy DriveRemoving a Floppy Drive Installing a Floppy Drive Removing a Media Card Reader Media Card ReaderInstalling a Media Card Reader Removing a CD/DVD Drive CD/DVD DriveInstalling a CD/DVD Drive Page Power Supply BatteryReplacing the Battery Replacing the Power Supply Removing the Processor ProcessorInstalling the Processor Page Removing the I/O Panel PanelProcessor Fan Installing the I/O PanelRemoving the Processor Fan Installing the Processor Fan Removing the System Board System BoardSystem Board Screws Installing the System Board Installing the Computer CoverBack to Contents September 2006 Rev. A00 Specifications Drives ConnectorsControls and Lights Physical PowerEnvironmental Entering System Setup System SetupSystem Setup Screen OverviewOnboard Devices System Setup OptionsNot Set Bypass isUnlocked Option Settings Boot SequenceChanging Boot Sequence for the Current Boot Setup & Boot MenuChanging Boot Sequence for Future Boots Clearing Forgotten PasswordsFlashing the Bios Clearing Cmos SettingsClick Save this program to disk, and then click OK Inside View of Your Computer Technical OverviewSystem Board Components Pin Number Signal name AWG Wire Power Supply DC Connector Pin AssignmentsDC Power Connector P2 DC Power Connector P10