Instruction/ maintenance manual of the product E521 Dell
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Dell™Dimension™E521ServiceManual Before You Begin About Your Computer Technical Overview Specifications Advanced Troubleshooting System Setup Removing and Installing Parts Model DCSM .
Back to Contents Page About Your Computer Dell™Dimension™E521ServiceManual Front View of the Computer Back View of the Computer Back Panel Connectors Front View of the Computer 1 cover latch release Use this latch to remove the cover.
Back View of the Computer Back Panel Connectors NOTICE: Ensure that there is a minimum of two inches of space between all vents and any object near these vents. NOTICE: Keep the vent area clean and dust - free to ensure that the computer is adequately ventilated.
Back to Contents Page network speed to 10 Mbps to ensure reliable operation. 3 network activity light Flashes a yellow light when the computer is transmitting or receiving network data. A high volume of network traffic may make this light appear to be in a steady "on" state.
Back to Contents Page Advanced Troubleshooting Dell™Dimension™E521ServiceManual Power Lights Diagnostic Lights Beep Codes System Messages Dell Di.
Beep Codes Your computer might emit a series of beeps during start - up if the monitor cannot display errors or problems. This series of beeps, called a beep code, identifies a problem. One possible beep code consists of one long beep and then two short beeps.
Afilenamecannotcontainanyofthefollowingcharacters:/:*?"<>| — Do not use these characters in filenames. Arequired.DLLfilewasnotfound — The program that you are trying to open is missing an essential file.
Dell Diagnostics Starting the Dell Diagnostics 1. Turn on (or restart) your computer. 2. When the DELL logo appears, press <F12> immediately. If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft ® Windows ® desktop, then shut down your computer and try again.
5. After all tests have completed, close the test window to return to the Dell Diagnostics Main Menu . 6. Close the Main Menu window to exit the Dell Diagnostics and restart the computer. Dell Diagnostics Main Menu 1. After the Dell Diagnostics loads and the Main Menu screen appears, click the button for the option you want.
If you experience a problem with any device, identify whether the driver is the source of your problem and, if necessary, update the driver. Windows XP 1. Click the Start button, then click Control Panel . 2. Under Pick a Category , click Performance and Maintenance .
10. Click Finish and restart your computer. Resolving Software and Hardware Incompatibilities If a device is not detected during the operating system setup or is detected but incorrectly configured, you can use the Hardware Troubleshooter to resolve the incompatibility.
Back to Contents Page Before You Begin Dell™Dimension™E521ServiceManual Getting Started Recommended Tools Turning Off Your Computer Before Working Inside Your Computer Getting Started This manual provides procedures for removing and replacing the components in your computer.
2. Disconnect any telephone or telecommunication lines from the computer. 3. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
Back to Contents Page Removing and Installing Parts Dell™Dimension™E521ServiceManual Removing the Computer Cover Memory Cards Drive Panel Drives .
4. Locate the three hinge tabs on the bottom edge of the computer. 5. Grip the sides of the computer cover and pivot the cover up, using the bottom hinge tabs as leverage points. 6. Release the cover from the hinge tabs and set it aside in a secure location.
Addressing Memory With 4 - GB Configurations Your computer supports a maximum of 4 GB of memory when you use four 1 - GB DIMMs. Current 32 - bit operating systems, such as Microsoft ® Windows ® XP, can use a maximum of 4 GB of address space; however, the amount of memory available to the operating system is less than that installed.
5. Insert the module into the connector until the module snaps into position. If you insert the module correctly, the securing clips snap into the cutouts at each end of the module. 6. Replace the computer cover. 7. Connect your computer and devices to electrical outlets, and turn them on.
l One PCI Express x1 card slot (SLOT2 l Two PCI card slots (SLOT3, SLOT4) See System Board Components for card slot location. PCI Cards Your computer supports two PCI cards. If you are installing or replacing a card, follow the procedures in the next section.
8. Before you close the card retention door, ensure that: l The tops of all cards and filler brackets are flush with the alignment bar. l The notch in the top of the card or filler bracket fits around the alignment guide. 9. Close the card retention door by snapping it into place to secure the cards.
14. If you installed an add - in network adapter and want to use only the add - in network adapter, then disable the integrated network adapter: a. Enter system setup (see System Setup ), go to Onboard Devices and select Integrated NIC, and then change the setting to Off .
6. Replace the computer cover (see Installing the Computer Cover ). 7. Reconnect the computer and devices to electrical outlets, and then turn them on. 8. Remove any drivers required for the card as described in the card documentation. 9.
6. If you are replacing a card that is already installed in the computer, remove the card. Disconnect any cables connected to the card. Gently pull the securing tab, grasp the card by its top corners, and then ease it out of its connector. 7. Prepare the card for installation.
12. Replace the computer cover (see Installing the Computer Cover ). 13. Reconnect the computer and devices to electrical outlets, and then turn them on. 14. If you installed a sound card: a. Enter system setup (see System Setup ), go to Onboard Devices and select Integrated Audio , and then change the setting to Off .
8. Replace the computer cover (see Installing the Computer Cover ). 9. Reconnect the computer and devices to electrical outlets, and then turn them on. 10. Remove any drivers required for the card as described in the card documentation. 11.
Removing the Drive - Panel Insert 1. Pull the drive - panel insert tab away from the drive panel insert to disengage the insert from the drive panel. 2. Without releasing the tab, pivot the drive - panel insert out and away from the drive panel.
2. Align the drive panel tabs with the side hinges. 3. Rotate the drive panel toward the computer until it snaps into place on the front panel.
When you install a drive, you connect a DC power cable and a data cable to the back of the drive. Drive Interface Connectors The drive cable connectors are keyed for correct insertion. Properly align the cable connector key on the cable and the drive before connecting.
Removing a Hard Drive 1. Follow the procedures in Before You Begin . 2. Remove the computer cover (see Removing the Computer Cover ). 3. Disconnect the power and data cables from the drive. 4. Press in on the blue tabs on each side of the drive and slide the drive up and out of the computer.
4. Align the hard drive bracket with the guides in the hard drive bay. 5. Gently slide the drive into place until you feel a click or the drive is securely installed. Take care not to let the drive free - fall into the drive bay. 6. Connect the power and hard - drive cables to the drive (see Connecting Drive Cables ).
Adding a Second Hard Drive 1. Check the documentation for the drive to verify that it is configured for your computer. 2. Follow the procedures in Before You Begin . 3. Remove the computer cover (see Removing the Computer Cover ).
Removing a Floppy Drive 1. Follow the procedures in Before You Begin . 2. Remove the computer cover (see Removing the Computer Cover ). 3. Remove the drive panel (see Removing the Drive Panel ). 4. Disconnect the power and data cable from the back of the floppy drive.
Installing a Floppy Drive 1. Follow the procedures in Before You Begin . 2. Remove the computer cover (see Removing the Computer Cover ). 3.
11. Connect your computer and devices to their electrical outlets, and then turn them on. See the documentation that came with the drive for instructions on installing any software required for drive operation. 12. Enter system setup (see System Setup ) and select the appropriate Diskette Drive option.
5. Slide the drive latch release toward the bottom of the computer and, without releasing the drive latch release, slide the Media Card Reader out through the front of the computer. 6. If you are not replacing the Media Card Reader, reinstall the drive panel insert, as needed (see Installing the Drive - Panel Insert ).
l Remove the Media Card Reader from its packaging. l Remove the shoulder screws from the inside of the drive - panel insert and attach the screws to the new Media Card Reader. 5. Gently slide the Media Card Reader into place until you feel a click or feel the drive securely installed.
5. Slide the drive latch release toward the bottom of the computer and, without releasing the drive latch release, slide the CD/DVD drive out through the front of the computer. 6. If you are not replacing the drive, replace the drive panel insert (see Installing the Drive - Panel Insert ).
1. Follow the procedures in Before You Begin . 2. Remove the computer cover (see Removing the Computer Cover ). 3. If you are installing a new drive, unpack the drive and prepare it for installation. Check the documentation that accompanied the drive to verify that the drive is configured for your computer.
12. When you restart your computer, enter system setup (see System Setup ), and select the appropriate Drive option. See the documentation that came with the drive for instructions on installing any software required for drive operation. 13. Verify that your computer works correctly by running the Dell Diagnostics (see Dell Diagnostics ).
Replacing the Power Supply 1. Follow the procedures in Before You Begin . 2. Remove the computer cover (see Removing the Computer Cover ).
13. Secure the hard drive cable, CD/DVD drive data cable, and the front panel ribbon cable to the securing clip on the side of the power supply. 14. Replace the computer cover (see Installing the Computer Cover ). 15. Connect your computer and devices to an electrical outlet, and turn them on.
7. Pull the release lever straight up until the processor is released. 8. Remove the processor from the socket. Leave the release lever extended in the release position so that the socket is ready for the new processor and see Installing the Processor .
5. Set the processor lightly in the socket and ensure that the processor is positioned correctly. 6. While lightly pressing down on the processor, rotate the release lever back toward the system board until it snaps into place, securing the processor.
11. Connect any cables disconnected before removing the heat sink assembly. 12. Replace the computer cover (see Installing the Computer Cover ). 13. Connect your computer and devices to an electrical outlet, and turn them on. 14. Verify that the computer works correctly by running the Dell Diagnostics (see Dell Diagnostics ).
Installing the I/O Panel 1. Reconnect the cables to the I/O panel. 2. Slide the I/O panel into place using the guides on the I/O panel bracket to help position the I/O panel in place, and use the notch on the I/O panel bracket to help seat the panel.
6. Rotate the heat sink assembly towards the rear of the computer, and then remove it from the computer. Lay the heat sink assembly down on its top, with the thermal grease facing upward. 7. Disconnect the processor fan cable from the system board (see System Board Components ).
3. Connect the processor fan cable to the system board (see System Board Components ). 4. Install the heat sink assembly: a. Place the heat sink assembly back onto the heat - sink assembly bracket.
Place the system board assembly that you just removed next to the replacement system board to ensure it is identical. Installing the System Board 1. Gently align the board into the chassis and slide it toward the back of the computer. 2. Using the six screws, secure the system board to the chassis.
1. Ensure that all cables are connected, and fold cables out of the way. 2. Ensure that no tools or extra parts are left inside the computer. 3. Align the bottom of the cover with the tabs located along the bottom edge of the computer. 4. Using the tabs as leverage, rotate the cover downward and press down to close it.
Back to Contents Page Dell™Dimension™E521ServiceManual IfyoupurchasedaDell™nSeriescomputer,anyreferencesinthisdocumenttoMicrosoft ® Windows ® operating systems are not applicable. Information in this document is subject to change without notice.
Back to Contents Page Specifications Dell™Dimension™E521ServiceManual Processor Processor type AMDAthlon™64X2dual - core processor AMD Athlon 64 processor AMDS.
connector size 124 pins connector data width (maximum) 32 bits PCI Express connector one x1 connector size 36 pins connector data width (maximum) 1 PCI Express lane PCI Express connector one x16 connector size 164 pins connector data width (maximum) 16 PCI Express lanes Drives Externally accessible: Bays one 3.
Back to Contents Page orange light — A good connection exists between a 100 Mbps network and the computer. off (no light) — The computer is not detecting a physical connection to the network.
Back to Contents Page System Setup Dell™Dimension™E521ServiceManual Overview Entering System Setup System Setup Options Boot Sequence Clearing Fo.
System Setup Options NOTE: Depending on your computer and installed devices, the items listed in this section may not appear, or may not appear exactly as listed. System System Info Displays the System name, BIOS Version , Service Tag, Express Service Code , and Asset Tag .
( On default) Video Primary Video ( Auto default) Specifies which video controller is primary when two video controllers are present on the computer. Auto enables the add - in video controller.
Boot Sequence This feature allows you to set the order in which the BIOS will search devices when trying to find an operating system. Option Settings l Bootable Hard Drive — The computer attempts to boot from the primary hard drive. If no operating system is on the drive, the computer generates an error message.
1. If you are booting to a USB device, connect the USB device to a USB connector (see Front View of the Computer ). 2. Turn on (or restart) your computer. 3. When F2 = Setup, F12 = Boot Menu appears in the upper - right corner of the screen, press <F12>.
3. Locate the 2 - pin password jumper (PSWD) on the system board (see System Board Components ), and remove the jumper to clear the password. 4. Replace the computer cover (see Installing the Computer Cover ). 5. Connect your computer and monitor to electrical outlets, and then turn them on.
4. If the Export Compliance Disclaimer window appears, click Yes, I Accept this Agreement . The File Download window appears. 5. Click Save this program to disk , and then click OK . The Save In window appears. 6. Click the down arrow to view the Save In menu, select Desktop , and then click Save .
Back to Contents Page Technical Overview Dell™Dimension™E521ServiceManual Inside View of Your Computer System Board Components Power Supply DC Connector Pin As.
Power Supply DC Connector Pin Assignments DC Power Connector P1 1 fan connector (FAN_CPU1) 2 processor socket (CPU) 3 memory module connectors (DIMM_1, DIMM_2, DIMM_3, DIMM_4) 4 power connecto.
DC Power Connector P2 DC Power Connectors P3, P5, P8, and P9 DC Power Connector P7 7 GND Black 8 PS_PWRGOOD Gray 9 P5AUX Purple 10 V_12P0_DIG White 11 V_12P0_DIG White 12 +3.
DC Power Connector P10 Back to Contents Page Pin Number Signal Name 22 - AWG Wire 1 +5 VDC Red 2 GND Black 3 GND Black 4 +12 VADC Yellow Pin Number Signal name 18 - AWG Wire 1 +12 .
An important point after buying a device Dell E521 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Dell E521 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Dell E521 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Dell E521 you will learn all the available features of the product, as well as information on its operation. The information that you get Dell E521 will certainly help you make a decision on the purchase.
If you already are a holder of Dell E521, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Dell E521.
However, one of the most important roles played by the user manual is to help in solving problems with Dell E521. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Dell E521 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
