Particular hardware related problems with a product (product must be in warranty) can be resolved by replacing parts, which customers can remove and replace by themselves. This process is called Customer Replaceable Unit or CRU. A service part, which can be removed and replaced by a customer, is called Customer Replaceable Unit (CRU) service part. Various levels of difficulty, inidicated with a specific CRU Level ID, are available and located in the service parts list.

The following is a list of the various CRU Level ID types:

CRU Level ID 0  -	Not possible (parts, either not to be replaced by the customer or not installed in the dedicated model)
CRU Level ID 1  -	Possible for all customers (simple to replace parts, requiring few or no tools)
CRU Level ID 2  -	Possible for experienced customers (optional parts, which are slightly more difficult to replace)
CRU Level ID 3  -	Possible for B2B customers with helpdesk (requires trained service personnel)

When installing a CRU, dynabook will send the CRU to you. CRU information and general replacement instructions are shipped with your product, and are available from dynabook at any time upon request.

Model specific CRU information
Tecra A40-J, A50-J, A40-K, A50-K, Satellite Pro A40J, A50-J

CRU service part removal and replacement procedure:

This document describes how to perform hardware service maintenance for your Personal Computer. The procedures described in this document are intended to help users to replace faulty Customer Replaceable Units (CRUs).

• STEP 1 - Removal of the defective part
  
  

  Removal of the Base Assy
  1.) Shut down the computer and disconnect the AC-Adapter
  2.) Remove the micro SD card, SIM card and the smart card first (these steps are optional and are depending on the hardware configuration of the unit)
  3.) Turn over the computer and remove nine M2.5 x 5BT screws from the Base Assy.

  
  
  
  4.) Lift up the Base Assy and remove it from the Cover
  
• 
  
  

  Removal of the Battery Pack:
  1.) Disconnect the harness from connector CN8021
  2.) Remove two screws S2 x 4CT
  3.) Disconnect the battery harness from connector CN8021 on the system board
  

  
  
  4.) Disconnect the battery harness from the connector of the battery pack
  
  
  
  
  
  Removal of the Memory Module
  
1.) Open the left and right latches outside and remove the Memory Module





Removal of the SSD:

1.) Remove one screw and disconnect the SSD from the connector CN1900 from the system board
2.) Disconnect the DC-IN harness from connector CN8001 and remove it from the slot of the cover assy




Removing the 3G module
1. Peel off the INSU SQUARE.
2. Disconnect the 3G ANTENNA cables from the connectors on the 3G
MODULE. (red tube from “MAIN”)
3. Remove the following screw and disconnect the 3G MODULE from the
connector CN2610 on the USB board (FMERLT*).




STEP 2 - Installation of the new part


Installing the 3G module

1.) Remove the pre-installed insulator and one the one screw mentioned above in the removal.
2.)Remove the insulation tube of each antenna

3.)Insert the 3G MODULE to the connector CN2610 on the USB board.
Secure the 3G MODULE with the screw
4.) Connect the 3G ANTENNA cables to the connectors on the 3G
MODULE. (red tube to “MAIN”)
5.) Stick a new INSU SQUARE in place.

Installing the SSD
1.) Insert the SSD to the connector CN1900 on the system board
2.) Push down the SSD and secure it with one screw S2 x 3.5BT




Installation of the Memory Module
1.) Insert the memory module(s) into the connector(s) slantwise and press it down to connect firmly
2.) When the power of the computer is turned on, the computer checks automatically the memory size. Confirm that the new memory is detected correctly
3.) If the memory is not detected, check if it is connected correctly

Installation of the Battery Pack
1.)  Connect the battery harness to the battery
2.) Set the battery pack back to the cover assy and secure it with two screws S2 x 4CT
3.) Connect the battery harness to connector CN8021 on the system board

Installation of the Base Assy
1.) Set the base assy in place
2.) Secure the base assy with nine M2.5 x 5BT screws 
3.) Keep the screwing order as shown in the picture below




• STEP 3 - Functional check of the product
  

  Perform a functional check to see, if the unit is working as expected.

  
  
  
• APPENDICES

  The appendices describe the following:

  • dynabook hardware removal and installation instructions
    
    
    
    
    

  NOTE

Pictures shown are for illustration purpose only. Actual product may vary due to product enhancement or platfrom generation changes.