Dell Precision 420 Manual de usuario

DellPrecision™WorkStation420SystemsServiceManual Desktop Chassis — Removing and Replacing Parts Mini Tower Chassis — Removing and Replacing Pa

6. Rotate the left side of the diskette drive up until the drive is clear of the retaining tabs. When you replace the 3.5-inch diskette drive on the

Hard-Disk Drive Bracket Removal To remove the hard-disk drive bracket, perform the following steps. NOTICE: If you are removing a hard-disk drive that

1. Remove the four screws that secure the hard-disk drive to the drive bracket. Retain these screws; they will be needed for the replacement drive.

8. Connect a DC power cable to the power input connector on the back of the drive (see Figure19). Check all connectors to be certain that they are

15. Test the hard-disk drive by running the Dell Diagnostics (see the online System User's Guide for more information). 16. If the drive you ju

4. Rotate the power supply up and out of the way of the system board (see Figure 20). 5. Disconnect the power supply connectors from the POWER_1 and

System Board Jumpers Figure 23 shows the location of the jumpers on the system board. Table1 lists the system board jumpers and their settings. Figur

System Board Labels Table 2 lists the labels for connectors and sockets on your system board, and it gives a brief description of their functions. Tab

To remove a Rambus in-line memory module (RIMM), perform the following steps. 1. Remove the computer cover. 2. Pressthesecuringclipsoutwardsimul

The system detects that the new memory does not match the existing system configuration information and generates the following message: The amount of

Back to Contents Page Desktop Chassis — RemovingandReplacingParts:DellPrecision™WorkStation420Systems Service Manual Overview This section pro

Figure 27. Microprocessor Replacement To insert the new microprocessor/heat sink assembly into the system board connector, perform the following steps

4. Rotate the power supply back into position, making sure that the securing tab snaps into place. 5. Replace the computer cover, and reconnect your

To remove the system battery, perform the following steps: 1. If possible, enter System Setup and print the System Setup screens. If the settings ar

1. Remove the computer cover. 2. Disconnect all cables from their connectors at the back of the computer. 3. Rotate the power supply. 4. Disconnect

Back to Contents Page Mini Tower Chassis — RemovingandReplacingParts:DellPrecision™WorkStation420 Systems Service Manual Overview This section

Restarting the System To restart the system and reset the chassis intrusion detector, perform the following steps: 1. Replace the computer cover and

4. Lift the bottom of the cover, allowing it to pivot up toward you. 5. Disengage the tabs that secure the cover to the top of the chassis, and lift

Interior Service Label Figure 4 shows the location of the interior service label on the inside of the system cover. This label shows the location of c

To remove the front panel, perform the following steps: 1. While pressing the tab release marked with the icon, tilt the panel away from the chassis.

Drives Figure 8. Drive Locations Diskette Drive Removal To remove the 3.5-inch diskette drive assembly, perform the following steps: 1. Disconnect t

Restarting the System To restart the system and reset the chassis intrusion detector, perform the following steps: 1. Replace the computer cover and

Figure 10. 3.5-Inch Diskette Drive Bracket 5.25-Inch Diskette, LS-120 SuperDisk, Tape, or CD-ROM Drive Removal To remove a diskette, LS-120 SuperDisk,

5.25-Inch Diskette, Tape, or CD-ROM Drive Replacement To install a replacement 5.25-inch diskette, tape, or CD-ROM drive, perform the following steps.

7. Connect a DC power cable to the power input connector on the back of the drive (see Figure 14). 8. Connect the appropriate interface cable to the

Hard-Disk Drive Removal 1. Remove the computer cover. 2. Remove the front panel as instructed in "Front Panel." 3. Disconnect the DC powe

6. Reinstall the hard-disk drive bracket in the chassis (see Figure 17). Insert the bracket into the chassis by sliding it in until the tabs snap into

9. If it is not already connected, connect the other end of the EIDE cable to the IDE1 connector on the system board. NOTICE: You must match the colo

3. Slide the card brace forward until it disengages from the slot in the card guide, then rotate the brace up and lift it away from the chassis. To r

Figure 21 shows the AGP card extension that occludes PCI slots 1 and 2. The following is a list of valid expansion-card combinations: l One AGP card

Figure 22. Installing an Expansion Card 5. When the card is firmly seated in the connector, secure the card's mounting bracket to the chassis wi

To remove an expansion-card guide cooling fan, perform the following steps. 1. Remove the computer cover according to the instructions in "Comput

To replace the computer cover, perform the following steps: 1. Check all cable connections, especially those that might have come loose during your w

To remove the chassis intrusion switch and install a replacement, perform the following steps: 1. Disconnectthechassisintrusionswitchcablefrom

4. Lift the release latch and slide the power supply about 25 mm (1 inch) toward the front of the system. 5. Continue to apply pressure on the releas

1CD-ROM drive audio connector2Main power 1 connector (desktop chassis)3Diskette connector4Main power 2 connector (desktop chassis)5Battery6RIMM (memo

System Board Jumpers Figure 29 shows the location of the jumpers on the system board. Table1 lists the system board jumpers and their settings. Figur

RIMMs To remove a Rambus in-line memory module (RIMM), perform the following steps. 1. Remove the computer cover according to the instructions in &quo

2. If necessary, remove any RIMMs that occupy sockets in which you plan to install the RIMMs. 3. Install the RIMMs. a. Locate the plastic securing c

1. Remove the computer cover. 2. Rotate the power supply. 3. Remove the existing microprocessor from its connector. Squeeze in on the two pairs of

Press the processor firmly into its connector until it is fully seated. You must use up to 25 lb of force to fully seat the processor in its connector

Battery Figure 35. Battery Removal  To remove the system battery, perform the following steps: 1. If possible, enter System Setup and print the Syst

To remove the system board, perform the following steps. 1. Remove the computer cover. 2. Disconnect all cables from their connectors at the back of

Front-Panel Inserts Figure5.5.25-Inch Front-Panel Insert Removal To remove a 5.25-inch front-panel insert, perform the following steps: 1. Hold t

Figure 7. AGP Pro50 Card Extension Figure 7 shows the card extension that may occupy PCI slots 1 and 2. The following is a list of valid expansion-car

Expansion-Card Guide Figure 8. Expansion-Card Guide Removal To remove the expansion-card guide, perform the following steps: 1. Remove the hard-disk

1. Disconnect the control panel cable from the PANEL connector on the system board (see Figure 22 for the location of the PANEL connector). 2. Remove

Figure 11. Drive Locations Diskette Drive Removal To remove the 3.5-inch diskette drive assembly, perform the following steps: 1. Rotate the system