Dell Inspiron 1525 User manual

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Dell™Inspiron™1525/1526ServiceManual
Notes, Notices, and Cautions
Information in this document is subject to change without notice.
©2007–2008DellInc.Allrightsreserved.
Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, and Inspiron are trademarks of Dell Inc.; Microsoft, Windows, and Windows Vista are either trademarks or registered trademarks of
Microsoft Corporation in the United States and/or other countries.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Inc. disclaims any
proprietary interest in trademarks and trade names other than its own.
Model PP29L
January2008Rev.A00
Before You Begin
Subscriber Identity Module (Optional)
ExpressCards
Using the Memory Card Reader
Optical Drive
Hard Drive
Center Control Cover
Internal Card With Bluetooth®Wireless Technology
Keyboard
Button Board
Memory
Display
Speaker Assembly
Palm Rest
ExpressCard Cage
Processor Thermal-Cooling Assembly
Processor Module
Wireless Mini-Cards
System Board Assembly
Coin-Cell Battery
Battery Latch Assembly
Flashing the BIOS
Pin Assignments for I/O Connectors
NOTE: A NOTE indicates important information that helps you make better use of your computer.
NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
CAUTION: A CAUTION indicates potential for property damage, personal injury, or death.

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Before You Begin
Dell™Inspiron™1525/1526ServiceManual
Recommended Tools
Before Working Inside Your Computer
This document provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that:
lYou have performed the steps in Before Working Inside Your Computer.
lYou have read the safety information in your Dell Product Information Guide.
lWhen replacing a component, you have already removed the original, if installed.
Recommended Tools
The procedures in this document may require the following tools:
lSmall flat-blade screwdriver
lPhillips screwdriver
lSmall plastic scribe
lFlash BIOS update (see the Dell Support website at support.dell.com)
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own personal safety.


1. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.

2. Click Start , click the arrow icon, and then click Shut Down to turn off your computer.

3. Disconnect your computer and all attached devices from their electrical outlets.

4. Disconnect any telephone or network cables from the computer.

5. Remove any installed cards from the ExpressCard slot (see Removing an ExpressCard or Blank) and the 8-in-1 memory card reader (see Removing a
Memory Card or Blank).

6. Turn the computer over.

NOTE: The color of your system and certain system components may appear differently than shown in this document.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformationGuide.
NOTICE: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not
covered by your warranty.
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface, such
as a connector on the back of the computer.
NOTICE: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal
mounting bracket. Hold a component such as a processor by its edges, not by its pins.
NOTICE: When disconnecting a cable, pull on the cable's connector or on its strain-relief loop, not on the cable itself. For cable connectors with locking
tabs, press inward on the locking tabs to release the connector. When connecting a cable, ensure that the connectors are correctly oriented and
aligned to avoid damage to the connector and/or the connector's pins.
NOTE: Ensure that the computer is off and not in a power management mode. If you cannot shut down the computer using the operating system,
press and hold the power button for 4 seconds.
NOTICE: To disconnect a network cable, first unplug the cable from your computer, and then unplug it from the network wall jack.
NOTICE: To help prevent damage to the system board, you must remove the battery from the battery bay before you service the computer.
NOTE: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for other Dell
computers.

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7. Slide the battery release latch until they click into place.

8. Slide the battery out of the battery bay.

9. Turn the computer top-side up, open the display, and press the power button to ground the system board.
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
1
battery
2
battery release latch

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Flashing the BIOS
Dell™Inspiron™1525/1526ServiceManual
Flashing the BIOS From a CD
Flashing the BIOS From the Hard Drive
If a BIOS-update program CD is provided with a new system board, flash the BIOS from the CD. If you do not have a BIOS-update program CD, flash the BIOS
from the hard drive.
Flashing the BIOS From a CD

1. Ensure that the AC adapter is plugged in and that the main battery is installed properly.

2. Insert the BIOS-update program CD, and turn on the computer.
Follow the instructions that appear on the screen. The computer continues to boot and updates the new BIOS. When the flash update is complete, the
computer will automatically reboot.

3. Press <F2> during POST to enter the system setup program.

4. Press <Alt> and <f> to reset the computer defaults.

5. Press <Esc>, select Save/Exit, and press <Enter> to save configuration changes.

6. Remove the flash BIOS update program CD from the drive and restart the computer.
Flashing the BIOS From the Hard Drive

1. Ensure that the AC adapter is plugged in, the main battery is properly installed, and a network cable is attached.

2. Turn on the computer.

3. Locate the latest BIOS update file for your computer at support.dell.com.

4. Click Download Now to download the file.

5. If the Export Compliance Disclaimer window appears, click Yes, I Accept this Agreement.
The File Download window appears.

6. Click Save this program to disk, and then click OK.
The Save In window appears.

7. Click the down arrow to view the Save In menu, select Desktop, and then click Save.
The file downloads to your desktop.

8. Click Close if the Download Complete window appears.
The file icon appears on your desktop and is titled the same as the downloaded BIOS update file.

NOTICE: Plug the AC adapter into a known good power source to prevent a loss of power. Failure to do so may cause system damage.
NOTE: If you use a BIOS update program CD to flash the BIOS, press <F12> before inserting the CD so that you can set up the computer to boot from a
CD for one time only. Otherwise, you must enter the system setup program to change the default boot order.
NOTICE: Do not interrupt this process once it begins. Doing so may cause system damage.
NOTICE: Plug the AC adapter into a known good power source to prevent a loss of power. Failure to do so may cause system damage.

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9. Double-click the file icon on the desktop and follow the instructions on the screen.
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

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Internal Card With Bluetooth®Wireless Technology
Dell™Inspiron™1525/1526ServiceManual


Removing the Internal Card With Bluetooth®Wireless Technology

1. Follow the procedures in Before You Begin.

2. Remove the center control cover (see Removing the Center Control Cover).

3. Remove the screw securing the card.

4. Grasp the connector end of the card and slide it out from under the securing tabs.

5. Disconnect the cable from the card.

Replacing the Internal Card With Bluetooth®Wireless Technology

1. Connect the cable to the card.

2. Slide the card at an angle into the card compartment and replace the securing screw.

3. Replace the center control cover (see Replacing the Center Control Cover).
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
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such
as a connector on the back of the computer).
NOTICE: To help prevent damage to the system board, you must remove the battery from the battery bay before you begin working inside the
computer.
1
card
2
securing screw

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Button Board
Dell™Inspiron™1525/1526ServiceManual


Removing the Button Board

1. Follow the procedures in Before You Begin.

2. Remove the center control cover (see Removing the Center Control Cover).

3. Remove the keyboard (see Removing the Keyboard).

4. Disconnect the button board cable from the system board.

5. Gently pry up the button board from the securing tabs starting from the top left corner.

Replacing the Button Board

1. To replace the button board, remove the palm rest (see Removing the Palm Rest).

2. Connect the button board cable to the system board.

3. Place the button board in position and gently press until the button board secures within the tabs.

4. Replace the keyboard (see Replacing the Keyboard).

5. Replace the center control cover (see Replacing the Center Control Cover).
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
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such
as a connector on the back of the computer).
NOTICE: To help prevent damage to the system board, you must remove the battery from the battery bay before you begin working inside the
computer.
1
button board
2
button board cable

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Using the Memory Card Reader
Dell™Inspiron™1525/1526ServiceManual

Removing a Memory Card or Blank

Press the card into the slot to release it from the card reader. When it is partially ejected, remove the card.

Installing a Memory Card

You can install a memory card in the computer while the computer is running. The computer automatically detects the card.
Memory cards are generally marked with a symbol (such as a triangle or an arrow) or a label to indicate which end to insert into the slot. The cards are keyed
to prevent incorrect insertion. If card orientation is not clear, see the documentation that came with the card.

1. Hold the card with the top side of the card facing up.

2. Slide the card into the slot until the card is completely seated in its connector.
If you encounter too much resistance, do not force the card. Check the card orientation and try again.
The computer recognizes the memory card and automatically loads the appropriate device driver. If the configuration program tells you to load the
manufacturer's drivers, use the media that came with the memory card, if applicable.
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
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: Use the memory card configuration utility (click the icon in the notification area) to select a card and stop it from functioning before you
remove it from the computer. If you do not stop the card in the configuration utility, you may lose data.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

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Center Control Cover
Dell™Inspiron™1525/1526ServiceManual


Removing the Center Control Cover

1. Follow the procedures in Before You Begin.

2. Remove the two screws securing the center control cover from the battery bay.

3. Turn the computer top side up, and open the display as far as it will open.

4. Insert a plastic scribe into the indent to lift the center control cover on the right side and ease the center control cover up.

5. Disconnect the cable from the media control buttons connector located underneath the center control cover.

6. Remove the center control cover.

7. Remove the two screws at the top of the keyboard.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such
as a connector on the back of the computer).
NOTICE: To help prevent damage to the system board, you must remove the battery from the battery bay before you begin working inside the
computer.
1
center control cover
2
scribe
3
media control buttons connector
NOTICE: To avoid damage to the data cable connected to the system board, ensure that you do not pull hard when you are raising the center control
cover.
NOTICE: To avoid damage to the center control cover, do not lift the cover on both sides simultaneously.

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
8. Lift the keyboard and hold it up and slightly forward to access to the media control buttons connector.

9. Disconnect the media control buttons connector and remove the media control buttons cable.

Replacing the Center Control Cover

1. Reconnect the media control buttons cable to the connector below the keyboard.

2. Align the tabs along the bottom of the keyboard and slide them under the palm rest.

3. Press on the right edge near the top to snap the keyboard into place.

4. Replace the two screws on the top of the keyboard.

5. Reconnect the media control buttons connector to the center control cover.

6. Insert the left edge of the center control cover.

7. Press from left to right until the cover snaps into place.

8. In the battery bay, replace the two screws that secure the center control cover.
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
NOTICE: The key caps on the keyboard are fragile, easily dislodged, and time-consuming to replace. Be careful when removing and handling the
keyboard.
1
screws (2)
2
keyboard
3
keyboard tabs (5)
4
keyboard cable
5
keyboard connector latch
6
media control buttons connector

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Coin-Cell Battery
Dell™Inspiron™1525/1526ServiceManual
Removing the Coin-Cell Battery
Replacing the Coin-Cell Battery
Removing the Coin-Cell Battery


1. Follow the instructions in Before You Begin.

2. Remove all memory module (see Removing Memory Module).

3. Remove the hard drive (see Removing the Hard Drive).

4. Remove the optical drive (see Removing the Optical Drive).

5. Remove all Mini-Cards (see Removing Mini-Card).

6. Remove the center control cover (see Removing the Center Control Cover).

7. Remove the keyboard (see Removing the Keyboard).

8. Remove the display assembly (see Removing the Display Assembly).

9. Remove the internal card with Bluetooth wireless technology, if installed (see Removing the Internal Card With Bluetooth®Wireless Technology).

10. Remove the palm rest (see Removing the Palm Rest).

11. Remove the ExpressCard cage (see Removing the ExpressCard Cage).

12. Remove the processor thermal-cooling assembly (see Removing the Processor Thermal-Cooling Assembly).

13. Remove the processor (see Removing the Processor Module).

14. Remove the system board (see Removing the System Board Assembly).

15. Use a plastic scribe to pry up the coin-cell battery from the slot.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
1
system board
2
slot
3
coin-cell battery



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Replacing the Coin-Cell Battery


1. Hold the coin-cell battery with the positive side up.

2. Slide the coin-cell battery into the slot and gently press until it snaps to the slot.

3. Follow the steps in Removing the Coin-Cell Battery in the reverse order.
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
CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.

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Processor Module
Dell™Inspiron™1525/1526ServiceManual

Removing the Processor Module


1. Follow the instructions in Before You Begin.

2. Remove the processor thermal-cooling assembly (see Removing the Processor Thermal-Cooling Assembly).

3. To loosen the ZIF socket, use a small, flat-blade screwdriver and rotate the ZIF-socket cam screw counterclockwise until it comes to the cam stop.

4. Lift the processor module from the ZIF socket.

Replacing the Processor Module


1. Align the pin-1 corner of the processor module with the pin-1 corner of the ZIF socket, then insert the processor module.
CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.
NOTICE: To avoid damage to the processor, hold the screwdriver so that it is perpendicular to the processor when turning the cam screw.
1
ZIF-socket cam screw
2
ZIF socket
NOTICE: To ensure maximum cooling for the processor, do not touch the heat transfer areas on the processor thermal-cooling assembly. The oils in
your skin can reduce the heat transfer capability of the thermal pads.
NOTICE: When removing the processor module, pull the module straight up. Be careful not to bend the pins on the processor module.
CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.
NOTICE: Do not touch the processor die. Press and hold the processor down on the substrate on which the die is mounted while turning the cam screw
to prevent intermittent contact between the cam screw and processor.
NOTICE: Ensure that the cam lock is in the fully open position before seating the processor module. Seating the processor module properly in the ZIF
socket does not require force. A processor module that is not properly seated can result in an intermittent connection or permanent damage to the
microprocessor and ZIF socket.
NOTE: If a new processor is installed, you will receive a new thermal-cooling assembly, which will include an affixed thermal pad, or you will receive a
new thermal pad along with a tech sheet to illustrate proper installation.
NOTE: The pin-1 corner of the processor module has a triangle that aligns with the triangle on the pin-1 corner of the ZIF socket.

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When the processor module is properly seated, all four corners are aligned at the same height. If one or more corners of the module are higher than the
others, the module is not seated properly.

2. Tighten the ZIF socket by turning the cam screw clockwise to secure the processor module to the system board.

3. Replace the processor thermal-cooling assembly (see Replacing the Processor Thermal-Cooling Assembly).
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
1
ZIF-socket cam screw
2
ZIF socket
3
pin-1 corner


NOTICE: To avoid damage to the processor, hold the screwdriver so that it is perpendicular to the processor when turning the cam screw.

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Processor Thermal-Cooling Assembly
Dell™Inspiron™1525/1526ServiceManual

Removing the Processor Thermal-Cooling Assembly


1. Follow the instructions in Before You Begin.

2. Turn the computer over.

3. Remove the eight captive screws securing the back cover and remove the module cover.

4. In sequential order, loosen the five captive screws securing the processor thermal-cooling assembly to the system board, then carefully lift the
processor thermal-cooling assembly out of the computer.

Replacing the Processor Thermal-Cooling Assembly

CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.
1
module cover
2
captive screws (8)
1
captive screws (5)
2
processor thermal-cooling assembly

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

1. Align the five captive screws on the processor thermal-cooling assembly with the screw holes on the system board.

2. In sequential order, tighten the five captive screws to secure the processor thermal-cooling assembly to the system board.

3. Replace the module cover and tighten the eight captive screws.
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
CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.

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Display
Dell™Inspiron™1525/1526ServiceManual
Display Assembly
Display Bezel
Display Panel
Camera and Microphone Assembly
Display Assembly

Removing the Display Assembly


1. Follow the instructions in Before You Begin.

2. Loosen the eight captive screws on the back cover and remove the cover.

3. Disconnect the antenna cables from the mini cards.

4. Lift the antenna cables from the securing tabs and release them from the routing channel.

5. Remove the two screws securing the display assembly from the bottom of the computer.

6. Remove the center control cover (see Removing the Center Control Cover).

7. Remove the keyboard (see Removing the Keyboard).
CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.
1
securing tabs
2
antenna cables

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
8. Disconnect the display cable from the connector.

9. Disconnect the camera cable from the connector.

10. Pull the antenna cables from the routing hole and release them from the routing channel.

11. Remove the four screws from the display assembly hinges.

12. Lift the display assembly out of the computer.

Replacing the Display Assembly


1. Follow the instructions in Before You Begin.

2. Align the display hinges with the holes in the base of the computer, then lower the display into place.

3. Replace and tighten the four display assembly hinge screws.

4. Slide the antenna cables through the routing hole to the base of the computer.

5. Replace the display cable, camera cable and antenna cables in their proper routing guides.
1
display cable
2
camera cable
1
display assembly
2
antenna cables
3
camera cable
4
display cable
5
Hinge screws (4)


CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.

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
6. Connect the display cable to the display cable connector on the system board.

7. Connect the camera cables to the camera cable connector on the system board.

8. Replace the keyboard (see Replacing the Keyboard).

9. Replace the center control cover (see Replacing the Center Control Cover).

10. Close the display and turn the computer over.

11. Replace and tighten the two screws securing the display assembly from the bottom of the computer.

12. Connect the antennae cables to the Mini-Cards (see Wireless Mini-Cards).

13. Replace the back cover and tighten the eight captive screws on the cover.
Display Bezel

Removing the Display Bezel


1. Follow the instructions in Before You Begin.

2. Remove the center control cover (see Removing the Center Control Cover).

3. Remove the keyboard (see Removing the Keyboard).

4. Remove the display assembly (see Removing the Display Assembly).

5. Remove the six rubber display bumpers from around the display bezel.

6. Remove the captive screw and five shoulder screws from around the display bezel.

7. Starting from the bottom corner of the display panel, use your fingers to pry the bezel from the top cover, then lift the inside edges to separate the
NOTE: Ensure that the display cable, camera cable, and antenna cables are properly routed and secured beneath the plastic tabs.
CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.
1
captive screw
2
rubber display bumpers (6)
3
shoulder screws (5)
4
display panel
5
display bezel


NOTICE: Removal of the bezel from the display back cover requires extreme care to avoid damage to the bezel and the display panel.

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remainder of the bezel.

Replacing the Display Bezel


1. Follow the instructions in Before You Begin.

2. Starting at any corner, use your fingers to gently snap the bezel into place to secure it to the display panel.

3. Replace the captive screw and five shoulder screws around the display bezel.

4. Replace the six rubber display bumpers around the display bezel.

5. Replace the display assembly (see Replacing the Display Assembly).

6. Replace the keyboard (see Replacing the Keyboard).

7. Replace the center control cover (see Replacing the Center Control Cover).
Display Panel

Removing the Display Panel


1. Follow the instructions in Before You Begin.

2. Remove the center control cover (see Removing the Center Control Cover).

3. Remove the keyboard (see Removing the Keyboard).

4. Remove the display assembly (see Removing the Display Assembly).

5. Remove the display bezel (see Removing the Display Bezel).

6. Remove the two screws securing the display panel to the cover.

7. Lift the display panel out of the display cover.

8. Remove the eight screws (four on each side of the display panel) securing the two brackets to the display panel and remove the brackets.
CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.
CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide.
1
screws (2)
2
display panel