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Dell Latitude 3520 Notebook Teardown removal guide for customer replaceable units (CRUS)

Summary: These guides take you step-by-step through the safe removal of the Customer Replaceable Unit (CRU) parts of a Latitude 3520 notebook system. (CRUs are the parts of the system that do not need an engineer to remove or replace.) The guides include pictures referencing what is involved. ...

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Instructions

Table of Contents:

  1. CRU Removal Guide
  2. Removal Instructions

 

Removal Guide

 

If these guides do not cover what you are looking to do, then you will want to reference your System Manual.

The article below provides information about safe practices to consider before working with electrical equipment.


Back to Top

 

Removal Instructions

 

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Removal Tools

1 Small Phillip's head screwdriver 2 Plastic Scribe
3 Small Flat head screwdriver    
 
Note: Be aware that using a large Phillips or Flat Head screwdriver may result in damage to the head of the screws. This would make their removal impossible without specialty tools, that are not available to our onsite engineers.

 

Note: You need to enter service mode if you are unable to disconnect the battery cable before performing any part removal or replacements.
 

  1. Steps to enter Service mode before working on your computer:

    1. Turn the computer off.

    2. Disconnect any telephone, network, USB and AC adapter cables from the computer.

    3. While holding down the B key, turn the computer on using the power button.

    4. When you see the owner tag appear on the screen, press any key on the keyboard.

    5. When you see the ready to proceed messaging on the screen, again press any key on the keyboard.

    6. The computer will turn off. At this point it's safe to remove and replace parts.

  2. Steps to exit Service mode after working on your computer:

    1. Insert the AC adapter cable to the computer.

    2. Press the power button to start the computer booting.

    3. The computer will boot to the operating system and exit service mode.

 

  1. Pre-Removal instructions before removing the Base Cover:

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

    2. Disconnect any telephone, network, or USB cables from the computer.

    3. Disconnect the computer and all attached devices from their electrical outlets and enter Service Mode.

  2. Turn the closed system upside down and Loosen the nine (9) captive screws in the base.

Base Cover 1

  1. Using something non-metallic, pry the base cover starting from the hinges and pry open the left and right edges, before prying off the bottom of the cover to release it from the chassis.

Base Cover 2

  1. Lift the cover away from the system.

 

  1. Pre-Removal instructions before disconnecting the Battery Cable:

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

    2. Disconnect any telephone, network, or USB cables from the computer.

    3. Disconnect the computer and all attached devices from their electrical outlets and enter Service Mode.

    4. Remove the Base Cover.

  1. Disconnect the battery cable from the motherboard and peel up the adhesive tapes and unroute the cable from the channel in the battery.

Battery Cable

  1. Disconnect the cable from the battery and remove it from the system.

 

  1. Pre-Removal instructions before removing the Memory Module:

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

    2. Disconnect any telephone, network, or USB cables from the computer.

    3. Disconnect the computer and all attached devices from their electrical outlets and enter Service Mode.

    4. Remove the Base Cover.

  1. The memory is located in the right-hand side corner of the chassis. Lift the mylar cover away from the memory DIMM and pull the metal retention clips away from either side of the module.

Memory

  1. The DIMM will pop up from the motherboard. Grip the DIMM and pull it out of the connector and the system.

Note: Repeat Steps 2 and 3 for any additional memory installed in the computer.

 

  1. Pre-Removal instructions before removing the Hard Disk Drive (HDD):

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

    2. Disconnect any telephone, network, or USB cables from the computer.

    3. Disconnect the computer and all attached devices from their electrical outlets and enter Service Mode.

    4. Remove the Base Cover.

  1. The HDD is located to the left-hand side of the battery, along the bottom edge of the chassis. Disconnect the HDD cable from the motherboard and unroute it from the clips securing it.

HDD 1

  1. Loosen the four (4) captive screws that lock the HDD module to the back of the palmrest assembly. Remove the HDD module from the computer.

HDD 2

 

  1. Pre-Removal instructions before removing the M.2 Solid State Drive (SSD):

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

    2. Disconnect any telephone, network, or USB cables from the computer.

    3. Disconnect the computer and all attached devices from their electrical outlets and enter Service Mode.

    4. Remove the Base Cover.

  1. The M.2 SSD 2230 card slot is located under the system fan on the left-hand side of the chassis. Remove the single screw securing the end of the card to the chassis.

2230 SSD 1

  1. The 2230 card will pop up from the motherboard. Grip the card and pull it out of the connector and the system.

2230 SSD 2

  1. The M.2 SSD 2280 card slot is located under the system fan on the left-hand side of the chassis. Remove the single screw securing the end of the card to the chassis.

2280 SSD 1

  1. The 2280 card will pop up from the motherboard. Grip the card and pull it out of the connector and the system.

2280 SSD 2

  1. A single screw secures the thermal plate to the conversion plate in the chassis. There are two possible locations on the conversion plate, depending on the size of the SSD card that you need to secure.

Thermal Plate

  1. The conversion plate is secured into the chassis with two (2) screws.

Conversion Plate

 

  1. Pre-Removal instructions before removing the Wireless Network WLAN Card:

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

    2. Disconnect any telephone, network, or USB cables from the computer.

    3. Disconnect the computer and all attached devices from their electrical outlets and enter Service Mode.

    4. Remove the Base Cover.

  2. The Wireless Card is located in the middle of the chassis. Remove the single captive screw that secures the end of the WLAN card to the motherboard. Remove the securing bracket from the system.

WLAN 1

  1. Disconnect the antenna cables from the card. (These are pop stud connectors and lift off with a little pressure.) With the WLAN card sitting up at an angle, pull the card out of the connector and the system.

WLAN 2

 

  1. Pre-Removal instructions before removing the Wireless Cellular WWAN Card:

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

    2. Disconnect any telephone, network, or USB cables from the computer.

    3. Disconnect the computer and all attached devices from their electrical outlets and enter Service Mode.

    4. Remove the Base Cover.

  2. The Wireless Cellular Card is located to the left of the chassis between the battery and system fan. Remove the single captive screw that secures the end of the WWAN card to the motherboard. Remove the securing bracket from the system.

WWAN 1

  1. Disconnect the antenna cables from the card. (These are pop stud connectors and lift off with a little pressure.) With the WWAN card sitting up at an angle, pull the card out of the connector and the system.

WWAN 2

 

  1. Pre-Removal instructions before removing the microSD Card:

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

  2. Push on the microSD card to have it pop out of the right-hand side edge of the system.

microSD

  1. Grip the card and pull it out of the computer.

 

  1. Pre-Removal instructions before removing the SIM Card Tray:

    1. During installation or removal of any hardware always ensures that all data is backed up properly.

  2. When you look at the system from the right-hand side, the SIM Card slot is to the left of the microSD card slot. Insert a SIM removal tool or pin into the hole in the SIM card tray. The tray will pop out enough for you to grip the tray and pull it out of the computer.

SIM Card

Note: This is an optional part and must be selected at point of purchase.
If you require further assistance, contact technical Support.
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Affected Products

Latitude 3520
Article Properties
Article Number: 000185286
Article Type: How To
Last Modified: 14 Apr 2021
Version:  1
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