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Dell Inspiron 7500 Dell Inspiron 7500 System Removing and Replacing Part - Page 31

Thermal Shield and Internal Modem, Removal

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To disconnect a cable from a ZIF connector, perform the following steps: 1. Insert a small flat-blade screwdriver or dental pick under the movable part of the connector. For most ZIFs, carefully pry up one end of the movable part of the connector and then the other end. Some ZIFs may need to be lifted in the center. 2. Pull up gently on the movable part of the connector until the cable is released. 3. Grasp the cable and pull it out of the connector. To reconnect an interface cable to a ZIF connector, perform the following steps: 1. Use the flat-blade screwdriver or dental pick to open the movable part of the ZIF connector. 2. Orient the end of the cable with the ZIF connector, and insert the end of the cable into the connector. 3. While holding the cable in place, close the ZIF connector. To ensure a firm connection, make sure the ZIF connector is completely closed. Thermal Shield and Internal Modem Removal The thermal shield (see Figure 18) serves as a heat shield for the system board, as well as an electromagnetic interference (EMI) fence for the processor board. support.dell.com Removing and Replacing Parts 23

Section	Page
Dell™ Inspiron™ 7500 REMOVING and REPLACING PARTS	3
Contents	5
Removing and Replacing Parts	9
Precautionary Measures	9
1. Ground yourself by attaching an antistatic grounding strap to your wrist and to an unpainted m...	9
2. Turn off the computer and any attached peripherals.	9
3. Disconnect the computer and any attached peripherals from electrical outlets to reduce the pot...	9
1. Determine the power state of the computer.	10
2. Turn off any attached peripherals, and then shut down the computer.	10
3. Disconnect the computer and any attached peripherals from electrical outlets to reduce the pot...	10
Figure 1. AC Adapter	10
4. If the computer is connected to a port replicator (see Figure 2), pull both release handles on...	10
Figure 2. Port Replicator	11
5. Remove the main battery from the battery compartment (see Figure 3).	11
Figure 3. Battery Compartment	12
6. Remove PC Cards (see Figure 4).	12
Figure 4. PC Card Removal	13
7. Remove the hard-disk drive assembly (see Figure 5).	13
Figure 5. Hard-Disk Drive Assembly Removal	13
8. Remove the memory module covers (see Figure 6).	14
Figure 6. Memory Module Covers	14
9. Remove the memory modules (see Figure 7).	14
Figure 7. Memory Modules	15
10. Remove the video card (see Figure 8).	16
Figure 8. Video Card Removal	16
11. If present, remove the module from the MegaBay™ (see Figure 9).	17
Figure 9. Media Bay Module Removal	17
Recommended Tools	17
Screw Identification and Tightening	18
Table 1. Screw Identification and Location	19
Exploded View of Computer	20
Figure 10. Computer Components	20
Exploded View of 15-Inch XGA Display Assembly	21
Figure 11. 15-Inch XGA Display Components	21
Exploded View of 15-Inch SXGA+ Display Assembly	22
Figure 12. 15-Inch SXGA+ Display Components	22
Exploded View of 15.4-Inch SXGA Display Assembly	23
Figure 13. 15.4-Inch SXGA Display Components	23
Hard-Disk Drive Disassembly	24
Figure 14. Hard-Disk Drive Components	24
1. Remove the hard-disk drive assembly.	24
2. Remove the four 3-mm screws securing the hard-disk drive inside the carrier.	25
3. Remove the hard-disk drive from the carrier.	25
4. Remove the metal carrier from the plastic cover.	25
Combo Module Disassembly	25
Figure 15. Combo Module Components	26
1. Remove the combo module.	26
2. Remove the two 3-mm screws from the L-shaped bracket.	26
3. Remove the bracket.	27
4. Remove the two 3-mm screws from the side of the plastic carrier.	27
5. Remove the two 3-mm screws from the bottom of the plastic carrier.	27
6. Disconnect the flex cable from the CD-ROM/DVD-ROM drive connector.	27
7. Remove the CD-ROM/DVD-ROM drive from the plastic carrier.	27
1. Remove the two 2.5-mm screws from the side of the CD-ROM/DVD-ROM drive.	27
2. Remove the side mounting bracket.	27
Figure 16. Side Mounting Bracket Removal	27
1. Remove the two 3-mm screws from the top of the metal shielding carrier.	28
2. Remove the two 3-mm screws from the side of the plastic carrier.	28
3. Lift the metal shielding carrier out of the plastic carrier.	28
4. Unsnap the metal latches along the top of the metal shielding carrier from the metal tabs on t...	28
5. Remove the diskette drive from the metal shielding carrier.	28
6. Remove the flex cable from the diskette drive.	28
7. Remove the 3-mm screw securing the mounting ear from the diskette drive, and remove the mounti...	28
Keyboard Removal	29
Figure 17. Keyboard Components	29
1. Turn the computer over and remove the four 20-mm screws from the bottom of the computer.	29
2. Turn the computer back over and open the display.	29
3. Insert a small flat-blade screwdriver or scribe along the right top of the keyboard, just abov...	30
4. Slide the keyboard toward the display assembly to release the front edge of the keyboard from ...	30
5. Rotate the bottom of the keyboard up toward the display assembly to expose the keyboard cable.	30
6. Disconnect the keyboard cable from zero insertion force (ZIF) connector JP14 on the system boa...	30
7. Remove the keyboard from the palmrest assembly.	30
ZIF Connectors	30
Figure 18. ZIF Connector Release	30
1. Insert a small flat-blade screwdriver or dental pick under the movable part of the connector.	31
2. Pull up gently on the movable part of the connector until the cable is released.	31
3. Grasp the cable and pull it out of the connector.	31
1. Use the flat-blade screwdriver or dental pick to open the movable part of the ZIF connector.	31
2. Orient the end of the cable with the ZIF connector, and insert the end of the cable into the c...	31
3. While holding the cable in place, close the ZIF connector.	31
Thermal Shield and Internal Modem Removal	31
Figure 19. Thermal Shield/Internal Modem Components	32
1. Remove the right hinge cover.	32
a. Open the computer to 170 degrees, supporting the display assembly.	32
b. From the outside edge of the unit, carefully insert a flat-blade screwdriver or scribe into th...	32
c. Bring the tool against the front wall of the hinge cover and pull toward the keyboard to loose...	32
d. Move the tool to the inside top of the hinge cover and lift the hinge cover off. If the hinge ...	33
2. If your computer has an internal modem, disconnect the twisted wire pair from connector JP2 on...	33
3. Remove the twisted wire pair from under the tabs in the thermal shield.	33
4. Bend the cables back over the palmrest assembly to move them out of the way of the thermal shi...	33
5. Remove the three flat-head 4-mm screws and the one K-head 4-mm screw securing the thermal shield.	33
6. Remove the thermal shield from the palmrest assembly.	33
1. Gently pull the modem card off of connector JP19 on the system board. Do not rock the card to ...	33
2. Remove the carrier tray by sliding it toward the back of the computer.	33
3. Remove the modem card from the carrier tray.	33
Heat Exchanger/Fan Removal	34
Figure 20. Heat Exchanger/Fan Components	34
1. Remove the two 5-mm screws securing the heat exchanger.	34
2. Disconnect the fan cable from connector JP17 on the system board.	34
3. Remove the heat exchanger/fan.	34
4. Inspect the two thermal pads on the bottom of the heat exchanger and replace them if necessary.	34
1. Remove the two 5-mm screws securing the heat exchanger.	34
2. Disconnect the fan cable from connector JP17 on the system board.	34
3. Lift the heat exchanger and rotate it upward.	35
4. Slide the heat exchanger/fan toward the front of the computer until the fan is completely clea...	35
5. Lift the heat exchanger/fan out at an angle.	35
6. Inspect the two thermal pads on the bottom of the heat exchanger and replace them if necessary.	35
Processor Board Removal	35
Figure 21. Processor Board Components	35
1. Remove the three 5-mm screws securing the processor board to the system board.	36
2. Gently pull the processor board off of connector JP15 on the system board. Do not rock the boa...	36
LCD Removal	36
Figure 22. LCD Components	36
1. Remove the left hinge cover.	37
2. Disconnect the LCD wire harness from connector JP3 on the system board.	37
3. Close the display.	37
4. Remove the four 6-mm screws that secure the two hinges to the hinge saddle extensions.	37
5. Unlatch the display and lift the assembly off the computer base.	37
Palmrest Component Assembly	38
Figure 23. Exploded View of Palmrest Assembly	38
Palmrest Assembly Removal	40
Figure 24. Palmrest Assembly Components	40
1. Remove the left and right hinge saddle extensions.	41
2. Remove the two 4-mm screws from the top inside of the combo bay.	41
3. Remove the two 4-mm screws from the top inside of the MegaBay.	41
4. Remove the two 4-mm screws from the top inside of the hard-disk drive bay.	41
5. Turn the unit back over.	41
6. Remove the three 6-mm screws from the top of the base assembly, along the back edge.	41
7. Remove the 6-mm screw from the DC-DC board.	41
8. Remove the 4-mm screw and the washer securing the grounding strap to the PC Card heat shield.	41
9. Disconnect the speaker wire harness from connector JP18 on the left side of the system board.	41
10. Disconnect the light-emitting diode (LED) cable from connector JP10 on the system board.	41
11. Remove the palmrest assembly from the base assembly.	41
Palmrest Assembly Component Removal	42
IR Board Removal	42
Figure 25. IR Board Components	42
1. Remove the two 4-mm screws securing the IR board.	42
2. Disconnect the IR cable from connector JP2 on the IR board.	42
3. Remove the IR board.	42
Touch Pad Assembly Removal	43
Figure 26. Touch Pad	43
Figure 27. Touch Pad Assembly Components	43
1. Remove the three 4-mm screws securing the touch pad button board.	44
2. Disconnect the two speaker cables from connectors JP5 and JP3 on the touch pad button board.	44
3. Disconnect the speaker wire harness from connector JP1 on the touch pad button board.	44
4. Disconnect the touch pad flex cable from ZIF connector JP4 on the touch pad button board. Use ...	44
5. Disconnect the touch pad flex cable from ZIF connector J1 on the touch pad. Use the pick to pr...	44
6. Remove the touch pad button board.	44
7. Remove the four 4-mm screws securing the touch pad bracket.	44
8. Remove the touch pad bracket.	44
9. Remove the touch pad.	44
Hard-Disk Drive Heat Shield Removal	45
Figure 28. Hard-Disk Drive Heat Shield Components	45
1. Place the palmrest assembly face down.	45
2. Remove the five 4-mm screws securing the hard-disk drive heat shield.	45
3. Remove the hard-disk drive heat shield.	45
Speaker Removal	46
Figure 29. Speaker Components	46
1. Remove any tape securing the speaker cables.	46
2. Remove the three 4-mm screws securing the left speaker cover.	46
3. Remove the left speaker cover, speaker, and speaker cable.	46
4. Remove the speaker wire harness.	47
5. Remove the two 4-mm screws securing the right speaker cover.	47
6. Remove the right speaker cover, speaker, and speaker cable.	47
7. Remove the display latch and spring.	47
PC Card Heat Sink Removal	47
Figure 30. PC Card Heat Sink Components	47
1. Remove the two 4-mm screws securing the PC Card heat sink.	48
2. Remove the heat sink.	48
DC-DC Board Removal	48
Figure 31. DC-DC Board	48
Hinge Saddle Removal	49
Figure 32. Hinge Saddle Components	49
1. Remove the four 4-mm screws from the top of the left and right hinge saddles.	50
2. Remove the four 4-mm screws from the back of the computer above the ports.	50
3. Remove the 10-mm screw and 20-mm screw from the right hinge saddle and remove the saddle.	50
4. Remove the 10-mm screw and 20-mm screw from the left hinge saddle and remove the saddle.	50
5. Disconnect the LED cable from connector J6 on the system board.	50
6. Remove the 6-mm screw from the plastic frame, remove any tape, and remove the plastic frame.	50
RJ-11 Card Removal	50
Figure 33. RJ-11 Card Components	50
1. Remove the 4-mm screw securing the RJ-11 card to the system board.	51
2. Lift the card off the system board.	51
System Board Removal	51
Figure 34. System Board Components	51
1. Remove the three 4-mm screws from the bottom of the computer.	51
2. Remove the system board from the bottom case.	51
PC Card Cage Removal	52
Figure 35. PC Card Cage Components	52
1. Remove the 4-mm screw securing the audio bezel.	52
2. Remove the audio bezel.	52
3. Remove the four 18-mm screws securing the PC Card cage to the system board.	52
4. Gently pull the card cage off of connector UP9 on the system board. Do not rock the cage to re...	53
Audio Card and Audio Thermal Shield Removal	53
Figure 36. Audio Card/Thermal Shield Components	53
1. Gently pull the audio card off of connectors JP12 and JP13 on the system board. Do not rock th...	53
2. Remove the 10-mm screw securing the audio thermal shield, and then remove the shield.	53
Latch Assembly Removal	54
Figure 37. Latch Assembly Components	54
1. Disconnect the LED cable from connector JP2 on the LED board.	54
2. Remove the 4-mm screw securing the LED board to the plastic base.	54
3. Remove the LED board.	54
4. Remove the two 4-mm screws holding the latch cover for the MegaBay and media bay.	54
5. Remove the latch cover.	54
6. Remove the center lock over the two latches with springs.	54
7. Remove each spring and latch.	55
Display Assembly and Display Assembly Component Removal	55
Figure 38. Display Assembly Removal	55
1. Remove the left hinge cover (see Figure 37).	56
2. Close the display.	56
3. Remove the four 6-mm screws that secure the two hinges.	56
4. Unlatch the display assembly and lift the assembly off the computer base.	56
Display Assembly Component Removal	56
Figure 39. Front Bezel Removal	56
1. Use a dental pick to pry the rubber screw covers off of the bottom two screws and the rubber b...	56
2. Remove the four 6-mm screws from the front bezel.	57
3. Unsnap the front bezel from the back cover and remove it from the assembly.	57
15-Inch LCD Panel Removal	57
1. Turn the computer over and remove the four+ screws from the bottom of the computer.	57
2. Turn the computer back over and open the display.	57
3. Remove the plastic hinge covers.	57
4. Insert a small flat-blade screwdriver or a similar plastic tool along the top-right edge of th...	57
5. Remove the keyboard bracket (located in the upper-right corner of the keyboard).	57
6. Remove the four screws that secure the two hinges.	57
7. Unplug the LCD wire harness and lift the assembly off the computer base.	57
1. Remove the two rubber screw covers and screws on the LCD near the hinge. Remove the remaining ...	57
2. With all screws removed, unsnap the front bezel from the back cover and remove the bezel from ...	57
1. Remove the four remaining screw covers and screws on the sides of the LCD.	57
2. With all screws removed, lift the LCD panel out and disconnect the inverter wire from the inve...	57
3. Detach the LCD wire harness from connector CN2 on the right side of the inverter board.	57
4. Carefully remove the grounding tape between the inverter board and the LCD panel.	57
5. Remove the two 2.5-mm screws securing the inverter board to the back cover.	58
6. Remove the inverter board from the back cover.	58
Exploded View of Base Assembly	59

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support.dell.com

Removing and Replacing Parts

To disconnect a cable from a ZIF connector, perform the following steps:

Insert a small flat-blade screwdriver or dental pick under the movable part of the

connector.

For most ZIFs, carefully pry up one end of the movable part of the connector and

then the other end. Some ZIFs may need to be lifted in the center.

Pull up gently on the movable part of the connector until the cable is released.

Grasp the cable and pull it out of the connector.

To reconnect an interface cable to a ZIF connector, perform the following steps:

Use the flat-blade screwdriver or dental pick to open the movable part of the ZIF

connector.

Orient the end of the cable with the ZIF connector, and insert the end of the

cable into the connector.

While holding the cable in place, close the ZIF connector.

To ensure a firm connection, make sure the ZIF connector is completely closed.

Thermal Shield and Internal Modem

Removal

The thermal shield (see Figure 18) serves as a heat shield for the system board, as

well as an electromagnetic interference (EMI) fence for the processor board.