Deck Buoy

10 mm deck buoy

deck buoy

Figure 4-24. Deck Buoy Removal bottom case assembly

Figure 4-24. Deck Buoy Removal

Part or Assembly Name

Order Name

Deck buoy

ASSY,CLMP,THRM,LXPiCD

To remove the deck buoy, follow these steps:

1. Remove the palmrest assembly.

2. Remove the display assembly.

3. Remove the diskette/CD-ROM assembly.

Lift the deck buoy out of the bottom case assembly.

Figure 4-25. Superpart Assembly Removal

Part or Assembly Name

Order Name

Superpart assembly

SVC,ASSY,FAN/SPKR,

BRKT,LXPiCD

The superpart assembly includes two speakers, two fans, the reserve battery, a printed circuit board for those parts, and an infrared printed circuit board. To remove the superpart assembly, follow these steps:

1. Remove the palmrest assembly.

2. Remove the display assembly.

3. Remove the diskette-drive/CD-ROM assembly.

4. Remove the deck-buoy.

5. Remove screw B4.

Lift the superpart assembly out of the bottom case assembly.

CAUTION: To prevent tearing the thermal tape, slowly pull the superpart assembly away from the system board.

superpart docking EMI clip connector JRBAT

superpart docking EMI clip connector JRBAT

Figure 4-26. Reserve Battery Removal

Part or Assembly Name

Order Name

Reserve battery

SVC,BTRY,RSRV,LXP

CAUTION: The reserve battery provides power to the computer's RTC and NVRAM when the computer is turned off. Removing the battery causes the computer to lose its date and time information as well as user-settable parameters in the NVRAM. If possible, make a copy of this information before you remove the reserve battery.

CAUTION: The reserve battery provides power to the computer's RTC and NVRAM when the computer is turned off. Removing the battery causes the computer to lose its date and time information as well as user-settable parameters in the NVRAM. If possible, make a copy of this information before you remove the reserve battery.

To remove the reserve battery, follow these steps:

1. Remove the palmrest assembly.

2. Remove the superpart assembly.

3. Remove the superpart docking EMI clip and the superpart serial EMI clip.

4. Unplug the battery from connector JRBAT.

5. Place the superpart assembly upside down on a flat work surface.

6. Remove screws F1 through F4.

Remove the speaker/fan bracket protecting the speakers and fan.

CAUTION: When replacing the speaker/fan bracket, be sure to reinstall the middle tab correctly.

7. Lift the battery out of its recess in the superpart assembly.

To free the reserve battery, thread the battery cable and connector through the opening in the plastic superpart assembly.

Part or Assembly Name

Order Name

System board assembly

SVC,SYS,PLN,LXPiCD-150ST, WB,0M

CAUTION: Dell uses the system's service tag number to maintain a history of the computer and its maintenance services. Do not neglect to transfer the service tag number to the replacement system board assembly (see step 3 of "Replacing the System Board Assembly" found later in this section).

CAUTION: Dell uses the system's service tag number to maintain a history of the computer and its maintenance services. Do not neglect to transfer the service tag number to the replacement system board assembly (see step 3 of "Replacing the System Board Assembly" found later in this section).

The system board's BIOS chip contains the system service tag number, which is also visible on a bar-code label on the bottom of the computer. The replacement kit for the system board assembly includes a diskette that provides a utility for transferring the service tag number to the replacement system board assembly.

Removing the System Board Assembly

To remove the system board assembly, follow these steps:

1. Remove the palmrest assembly.

2. Remove the display assembly.

3. Remove the diskette/CD-ROM assembly.

4. Verify that the PC Card ejectors are fully depressed.

5. Remove the deck buoy plate. (Reinstall this part on the new system board.)

CAUTION: To ensure maximum cooling for the microprocessor, do not touch the heat transfer area on the system board above the microprocessor or on the deck buoy plate. The oils in your skin reduce the heat transfer of the thermal pads.

6. Remove the superpart assembly.

Carefully disengage the superpart docking EMI and serial EMI clips from the I/O docking EMI and serial EMI clips.

7. Remove screws SB1 and SB2, which retain the system board (see Figure 4-27).

8. Lift the system board approximately 2 inches from the back of the computer.

9. Disengage the front of the system board from the three molded tabs in the bottom case assembly.

The tabs' approximate location is shown in Figure 4-27. The tabs are located alongside the hard-disk drive compartment, inside the bottom case assembly.

CAUTION: When removing the system board assembly, be careful not to damage the main battery connector and EMI shield on the bottom of the assembly.

10. Lift the system board assembly out of the bottom case assembly.

NOTE: If the main battery insulator comes out with the system board assembly detach the insulator and set it aside.

Replacing the System Board Assembly

Observe the following precautions when you reinstall a system board:

1. Before reinstalling the system board assembly, make sure the upper I/O bracket clip and the side I/O bracket clip are in place. If the side I/O bracket clip has been dislodged, reinstall it as shown in Figure 4-27.

CAUTION: To avoid possible damage to the computer, make sure the system board assembly is inserted under the three molded tabs at the front of the bottom case assembly.

Figure 4-28. I/O Bracket dips

2. While reinstalling the system board assembly, make sure the power button is positioned as far as it will go toward the back of the computer.

This will ensure that the power button engages the power switch properly.

3. Enter the system's service tag number into the BIOS of the replacement system board assembly.

Insert the diskette that accompanied the replacement system board assembly into the diskette drive, and turn on the computer. Follow the instructions on the display screen.

Figure 4-28. I/O Bracket dips

I/O bracket clip

I/O bracket clip

3.1-V Power Supply Board

Part or Assembly Name

Order Name

3.1-V power supply board

CRD,PWR SPLY,LXPiCD,V3.1,NBK

To remove the 3.1-V power supply board, follow these steps:

1. Remove the palmrest assembly

2. Remove the superpart assembly.

3. Remove the 3.1-V power supply board from the system board.

The power supply board is held in place on the system board by connectors JPS1 and JPS2.

Figure 4-30. I/O-Panel Dust Cover Removal

Part or Assembly Name

Order Name

I/O-panel dust cover

DOOR,PLSTC,I/O,LXP/NBK

To remove the I/O-panel dust cover, follow these steps:

1. Remove the palmrest assembly.

2. Remove the display assembly.

3. Remove the superpart assembly.

4. Remove the system board.

5. Remove the I/O-panel dust cover.

Push outward on one end of the dust cover to release the pivot pin from its associated pivot hole. Then repeat the operation for the other end of the cover. After both ends have been disengaged, lift the dust cover away from the system board assembly.

To replace the I/O-panel dust cover, orient the cover in its original position and snap the pivot pins into place in their associated pivot holes. Make sure the dust cover opens and closes freely before you reinstall the display assembly.

Advanced Port Replicator Connector Dust Cover

Figure 4-31. Advanced Port Replicator Connector Dust Cover

Part or Assembly Name

Order Name

Advanced Port Replicator

CVR,DOOR,DOCKING,LXP

connector dust cover

To remove the dust cover for the Advanced Port Replicator connector, follow these steps:

1. Remove the palmrest assembly.

2. Remove the display assembly.

3. Remove the dust cover.

Figure 4-32. Audio Board Removal

Part or Assembly Name

Order Name

Audio board

PWA,AUDIO,LXPiCD,NBK

To remove the audio board, follow these steps:

1. Remove the palmrest assembly.

2. Remove the display assembly.

3. Remove the superpart assembly.

4. Remove the system board.

5. Remove the hard-disk drive bracket.

Turn the system board over and place it on a flat work surface. Remove screw HD1, which secures the bracket to the system board. Turn the system board over so that the bracket is on the top. Use a plastic scribe or a small flat-blade screwdriver to pry the bracket from connector JTB. Gently push the bracket outward from the system board until the bracket is disengaged from the audio connectors, and lift the bracket away from the system board.

6. Lift the audio board straight up from the system board.

The audio board is held in place on the system board by connector JAUDIO.

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