Dell Inspiron 7000 Service Guide

							Removing and Replacing Parts 4-47
5. Turn the unit back over.
6. Remove the three 6-mm screws from the top of the base assembly, along 
the back edge.
7. Remove the 6-mm screw from the DC-DC board.
8. Remove the 4-mm screw and the washer securing the grounding strap to 
the PC Card heat shield.
9. Disconnect the speaker wire harness from connector JP18 on the left side 
of the system board.
This wire harness also contains wiring for the touch pad and the touch pad 
buttons.
10. Disconnect the LED cable from connector JP10 on the system board.
11. Remove the palmrest assembly from the base assembly. 
Start at the back right of the computer and move forward around the com-
puter. Carefully lift the palmrest assembly up and pull it for ward to unsnap 
the hidden tabs spaced around the sides and along the top of the battery 
bay and options bay.
When replacing the palmrest assembly, orient the assembly in its original posi-
tion on the base assembly and press firmly near each tab until the palmrest 
assembly snaps into place. Start at the front to align those tabs first. Make 
sure that all the tabs are aligned.
The following subsections provide removal and replacement procedures for 
the components of the palmrest assembly. 
						

							4-48HOO,QVSLURQ6HUYLFH0DQXDO
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The IR board (see Figure 4-31) controls the power button, lid switch, micro-
phone, and lights on the indicator panel above the keyboard. 
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This procedure assumes that you have removed the palmrest assembly from 
the base assembly. To remove the IR board, follow these steps:
1. Remove the two 4-mm screws securing the IR board.
2. Disconnect the IR cable from connector JP2 on the IR board.
3. Remove the IR board.
4-mm 
screws (2)
IR board
IR cable 
						

							Removing and Replacing Parts 4-49
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This section provides the removal procedure for the hard-disk drive heat shield.
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This procedure assumes that you have removed the palmrest assembly from 
the base assembly. To remove the hard-disk drive heat shield, follow these 
steps (see Figure 4-32):
1. Place the palmrest assembly face down.
2. Remove the five 4-mm screws securing the hard-disk drive heat shield.
3. Remove the hard-disk drive heat shield.
hard-disk drive 
heat shield
4-mm 
screws (5) 
						

							4-50HOO,QVSLURQ6HUYLFH0DQXDO
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This section provides the removal procedure for the touch pad assembly.
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This procedure assumes that you have removed the palmrest assembly from 
the base assembly and that you have removed the hard-disk drive heat shield. 
To remove the touch pad assembly, follow these steps (see Figure 4-33):
1. Remove the three 4-mm screws securing the touch pad button board.
2. Disconnect the two speaker cables from connectors JP5 and JP3 on the 
touch pad button board.
3. Disconnect the speaker wire harness from connector JP1 on the touch pad 
button board.
4. Disconnect the touch pad flex cable from ZIF connector JP4 on the touch 
pad button board. Use the pick to pry up the latches on each side of the 
connector. 
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5. Disconnect the touch pad flex cable from ZIF connector J1 on the touch 
pad. Use the pick to pry up the brown center piece on the connector.
touch pad
touch pad bracket
touch pad 
button board
4-mm 
screws (3)
4-mm screws (4)
touch pad 
flex cable
ZIF connector 
						

							Removing and Replacing Parts 4-51
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6. Remove the touch pad button board.
7. Remove the four 4-mm screws securing the touch pad bracket.
8. Remove the touch pad bracket.
9. Remove the touch pad.
The touch pad buttons are heat-staked into the palmrest assembly and are 
not removable. 
						

							4-52HOO,QVSLURQ6HUYLFH0DQXDO
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This section provides the removal procedure for the speakers.

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This procedure assumes that you have removed the palmrest assembly from the 
base assembly and that you have removed the hard-disk drive heat shield and 
touch pad assembly. To remove the speakers, follow these steps (see Figure 4-34):
1. Remove any tape securing the speaker cables.
2. Remove the three 4-mm screws securing the left speaker cover.
NOTE: Before removing the speaker cables and wire harness, be sure to 
note their routing through the slots and pins so you can correctly reinstall 
the components.
3. Remove the left speaker cover, speaker, and speaker cable.
4. Remove the speaker wire harness.
5. Remove the two 4-mm screws securing the right speaker cover.
6. Remove the right speaker cover, speaker, and speaker cable.
The display latch is no longer secured by the speaker covers. Be careful not 
to lose the spring.
7. Remove the display latch and spring.
To replace the speaker, resolder the speaker cable to the new speaker.
When reinstalling the speakers, be especially careful to route the speaker 
cables and speaker wire harness through the appropriate slots and pins.
4-mm 
screws (5)
speakers (2)
display latch
left speaker
coverdisplay latch
spring
right speaker
cover
speaker wire 
harness
speaker 
cables (2) 
						

							Removing and Replacing Parts 4-53
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The following subsections provide removal and replacement procedures for 
most components of the base assembly. The procedures in these subsections 
assume that the keyboard, thermal shield, display assembly, and palmrest 
assembly have been removed.
The base assembly consists of the following components:
‡PC Card heat sink
‡Heat exchanger/fan
‡DC-DC board
‡LV D S  b o a r d
‡RJ-11 card
‡Processor board and memory module
‡Hinge saddles
‡System board
‡PC Card cage
‡Audio board and audio thermal shield
‡Latch assembly
‡Kensington lock
‡Bottom case 
						

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This section provides the removal procedure for the PC Card heat sink.
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To remove the PC Card heat sink, follow these steps (see Figure 4-35):
1. Remove the two 4-mm screws securing the PC Card heat sink.
2. Remove the heat sink.
4-mm 
screws (2)
PC Card heat sink 
						

							Removing and Replacing Parts 4-55
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This section provides the removal procedure for the heat exchanger/fan.
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To remove the heat exchanger/fan, follow these steps (see Figure 4-36):
1. Remove the two 5-mm screws securing the heat exchanger.
2. Disconnect the fan cable from connector JP17 on the system board.
3. Remove the heat exchanger/fan.
4. Inspect the two thermal pads on the bottom of the heat exchanger and 
replace them if necessary.
When reinstalling the heat exchanger/fan, be sure to reconnect the fan cable 
to JP17; if you have an internal modem, there is an identical connector (JP2) 
next to JP17.
The heat exchanger/fan can be removed without removing the palmrest 
assembly.
1. Remove the two 5-mm screws securing the heat exchanger.
2. Disconnect the fan cable from connector JP17 on the system board.
3. Lift the heat exchanger and rotate it upward.
4. Slide the heat exchanger/fan toward the front of the computer until the fan 
is completely clear of the overhanging palmrest plastic.
5. Lift the heat exchanger/fan out at an angle.
6. Inspect the two thermal pads on the bottom of the heat exchanger and 
replace them if necessary.
heat exchanger
5-mm 
screws (2)
fan
cable 
						

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This section provides the removal procedure for the DC-DC board.
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To remove the DC-DC board, gently pull the DC-DC board off of connectors 
JP11 and JP16 on the system board (see Figure 4-37). Do not rock the board to 
remove it, because this may damage the connectors. 
DC-DC board