Fujitsu LIFEBOOK U7411 User guide

Page 1 of 49
System upgrades and repairs 2
Information on the installation and removal of components 3
Screws 4
Tools 5
Switching off the battery 6
Removing the SIM card cover 7
Inserting the SIM card cover 8
Mandatory Support Bulletins for Disassembly 9
Removing the lower assy 10
Removing the battery 11
Removing the white protective film 12
Removing the memory 13
Removing the M.2 module 14
Removing the LTE module 15
Removing the WLAN module 17
Removing the speaker 18
Removing the Touchpad buttons sub board 19
Removing the touchpad buttons 20
Removing the fan 21
Removing the heatsink 22
Fingerprint sensor incl. SecureBio sub board 23
Removing the CMOS battery 24
Removing the TPM module 25
Removing the keyboard 26
Inserting the red plastic strip of the keyboard 28
Removing the mainboard 29
Removing the upper assy of the case 30
Removing the LCD assy 32
Removing the LCD hinge covers 33
Removing the LCD back cover assy 34
Removing the LCD hinges 36
Removing the LCD panel 37
LIFEBOOK U7411 replacement parts and exploded-view drawings 39
Disposal information for recycling companies 48
System upgrades and repairs
LIFEBOOK U7411
Version date
19.03.2021
Category
System upgrades and repairs
Contents

Page 2 of 49
System upgrades and repairs
We recommend printing out the relevant sections of this chapter prior to installation
as the device for installing/removing hardware components needs to be switched
off.
The following illustrations may differ from your device, depending on its configuration and features.
If you have received any further documents with your device, you should read these through carefully.
Please note the following instructions before installing/removing system components:
■The device must be switched off when installing/removing components and it
must not be in power-saving mode.
■Disconnect the mains plug before opening the device.
■After unplugging the mains plug, discharge the remaining voltage by pressing
the activation button.
■Remove all externally connected cables.
■Take care not to pinch any cables when installing/removing components.
■Please ensure that the installed components that might heat up intensely
during operation do not exceed the permitted operating temperature.
Please take note of the target audience addressed in this manual. Damage to the device incurred as a result of unqualified
methods used during repair work as well as the use of unsuitable spare parts or assemblies during the repair work, or
upgrades of the device may void your warranty claim.
During a system expansion or a hardware upgrade, it is possible that the
BIOS must be updated. You can find more information in the technical
information provided for your device.
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Information on the installation and removal of components
Please pay attention to the locking mechanism (indentations and centring pins) when installing hardware components.
Note that some components on the mainboard may be very hot if the device was in use shortly before the case was removed.
Utmost care is required during installation and removal to avoid damaging components.
Never use items with sharp edges (screwdrivers) to lever them out.
Parts with Electrostatic Sensitive Devices (ESD) can be identified by a corresponding label.
When dealing with boards with ESDs, the following points must always be observed:
■Always ensure there is a static discharge (e.g. by touching a grounded object)
prior to commencing with the work.
■The devices and tools being used must not be statically charged.
■Only touch the components along the edges or on the areas marked in green (contact points).
■Contacts and electronic components must not touch when handling components
equipped with ESD protection.

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Screws
Screw: M2.5XL3 (D4.5)
Screwdriver: Phillips PH00
Screw: M2.5XL4
Screwdriver: Phillips PH00
Screw: M2.5XL6 (D4.5)
Screwdriver: Phillips PH00
Screw: M2XL2.5
Screwdriver: Phillips PH00
Screw: M3XL3.5-1
Screwdriver: Phillips PH00
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Tools
Screwdriver: Phillips PH00
Plastic tool
Plastic tool
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Switching off the battery
►Disconnect the mains plug from the mains outlet.
►Remove all cables connected to the Notebook.
►Close the LCD display by closing the notebook.
►Turn your notebook over and place it on a stable and flat surface. If necessary, lay an anti-slip cloth on this surface to prevent
the notebook from being scratched.
►Push a pen or piece of wire (e.g. a paper clip) into the opening of the battery reset button (yellow arrow) to disconnect the
battery from the system.
Warning!
The battery can be disconnected by pushing the battery reset button located on the bottom of the device.
As soon as an AC adapter is connected to the device, the battery is ready for operation.
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Removing the SIM card cover
►The slot for the SIM card is located at the back of the device (see green frame).
Figure 1 Figure 2 Figure 3
►Open the SIM card cover (Figure 1). The SIM card cover is embedded in the device.
►Carefully pull the SIM card cover out of the opening with your thumb and index finger until it can be removed completely
(Figure 2).
►The SIM card cover can now be removed (Figure 3).
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Page 8 of 49
Inserting the SIM card cover
►The slot for the SIM card is located at the back of the device (see green frame).
Figure 1 Figure 2 Figure 3
►The SIM card cover is provided with a bracket (yellow arrow) that is fed into the device and embedded there
(Figure 1).
►Slide the SIM card cover bracket into the SIM tray opening (green arrow, Figure 2).
►Check that the SIM card cover is correctly seated by pulling the cover forward out of the device. The SIM card cover is
correctly inserted if it cannot simply be pulled completely out of the device but remains in the device due to being embedded
(Figure 3).
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Page 9 of 49
Mandatory Support Bulletins for Disassembly
SB-M-10030
Minimum requirements to properly finalise hardware repairs on mobile systems
SB-M-15007
WIN8x & WIN10 - Spare product key for repaired devices
For any information about ESD, please refer to the web-based training course “ESD in
electronics“

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Only intended for authorised service technicians
Removing the lower assy
Required work steps:
■Switching off the battery
Required tools:
■Screwdriver: Phillips PH00
►First, remove all cards or plastic dummies (e.g. SIM card, SD card, etc.).
►Disconnect the mains plug from the mains outlet.
►Disconnect all the cables that are connected to the notebook.
►Turn your notebook over and place it on a stable and flat surface. If necessary, place a non-slip cloth on the surface to
avoid scratching the notebook.
►Remove the thirteen screws (yellow circles). Please note that the screws are not removed from the housing, but remain on
the lower assy.
►Lift the lower assy from the device as shown by the green arrows.
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Page 11 of 49
Only intended for authorised service technicians
Removing the battery
Required work steps:
■Switching off the battery
■Removing the lower assy
Required tools:
■Screwdriver: Phillips PH00
►Remove the six screws (yellow circles). Please note here that the screws are not removed from the battery, but remain on
the battery.
►Now lift the battery out of the device as indicated by the green arrow.
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Page 12 of 49
Only intended for authorised service technicians
!
Removing the white protective film
Required work steps:
■Switching off the battery
■Removing the lower assy
Required tools:
■none
Warning!
There are white protective films on the upper part of the device. These are fitted to protect against an electrical short circuit.
In the event of replacement of the mainboard, these films are included in the scope of delivery when the mainboard is
ordered and are fitted in the device after replacement of the mainboard.
►To access the components, such as memories, WLAN module, LTE module, TPM module, fan, CMOS battery or heatsink,
fold the white protective films to the side or remove them very carefully. These are fixed at points with double-sided
adhesive tape (see red arrows).
►After the repair, the films must be correctly reattached.
►When replacing the mainboard, these are included in the scope of delivery and are replaced accordingly.
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Page 13 of 49
Only intended for authorised service technicians
Removing the memory
Required work steps:
■Switching off the battery
■Removing the lower assy
■Removing the battery
Required tools:
■Plastic tool
►Position of the memories (red frame).
►Using a plastic tool, loosen the memories locks (red circles) by pushing them sideways (yellow arrows).
►Now the storage module can be pulled out of the socket (green arrows).
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Page 14 of 49
Only intended for authorised service technicians
Removing the M.2 module
Required work steps:
■Switching off the battery
■Removing the lower assy
■Removing the battery
Required tools:
■Screwdriver: Phillips PH00
The figure below is of a device with a fingerprint sensor. In configurations with a palm vein sensor or fingerprint sensor,
M.2 modules in half size (22x30) are used. In the SPI "Spare Part Information" tool, these modules are marked with the
suffix "2230". Devices that are configured without a palm vein sensor or fingerprint sensor are equipped with a full size
module (22x80).
►Position of the M.2 module (red frame).
►Loosen and remove the screw M2XL2.5 (yellow circle).
►After removing the screw, the M.2 module flicks upwards and can now be carefully pulled out of the socket in the direction
of the green arrow.
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Page 15 of 49
Only intended for authorised service technicians
Removing the LTE module
Required work steps:
■Switching off the battery
■Removing the lower assy
■Removing the battery
Required tools:
■Screwdriver: Phillips PH00
■Plastic tool
►Position of the LTE module (red frame).
►Loosen and remove the screw M2XL2.5 (yellow circle).
►Carefully pull both WWAN antennas from the LTE module (red circles).
To do so, use a suitable plastic tool.
►Now the LTE module is loose and can be carefully pulled out of the socket in the direction of the green arrow.

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Only intended for authorised service technicians
!
Warning!
When fitting the LTE module, make sure that both antenna cables are properly connected.
The yellow cable must be connected to the “MAIN” port and the orange one to the “AUX” port.
(yellow -> MAIN; orange -> AUX)
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Page 17 of 49
Only intended for authorised service technicians
!
Removing the WLAN module
Required work steps:
■Switching off thee battery
■Removing thee lower assy
■Removing the battery
Required tools:
■Plastic tool
►In the LIFEBOOK U7411, the WLAN module is soldered onto the mainboard and is therefore not replaceable. In case of
repair in connection with the WLAN module, the mainboard must therefore be replaced.
►Position of the WLAN module (red frame).
►Carefully pull the two WLAN antennas upwards off the WLAN module (red circles).
To do so, use a suitable plastic tool.
Warning!
Please ensure that the two WLAN antenna cables are connected correctly.
The grey cable must be connected to the “MAIN” port and the black one to the “AUX” port.
(grey -> MAIN; black -> AUX)
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Page 18 of 49
Only intended for authorised service technicians
!
Removing the speaker
Required work steps:
■Switching off the battery
■Removing the lower assy
■Removing the battery
Required tools:
■Plastic tool
►Carefully pull the cable from the speaker (green circle) out of the socket downwards (yellow arrow).
►Carefully remove the black adhesive tapes (red arrows) that hold the cable of the speaker.
►The speaker is fixed in the device by plastic latches (yellow circles), it is not screwed.
►The speaker can now be removed upwards from the device (green arrow).
Warning!
When removing the speaker, make sure that the two rubber rings on the left and right of the loudspeaker are seated
correctly. These could come loose.
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Page 19 of 49
Only intended for authorised service technicians
Removing the Touchpad buttons sub board
Required work steps:
■Switching off the battery
■Removing the lower assy
■Removing the battery
■Removing the speaker
Required tools:
■Screwdriver: Phillips PH00
►Open the connections (green circles) by flipping open the respective lock and remove the flexprint cables.
►Loosen and remove the three screws M2XL2.5 (yellow circles).
►Now the sub board touchpad buttons can be removed from the unit.
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Page 20 of 49
Only intended for authorised service technicians
Removing the touchpad buttons
Required work steps:
■Switching off the battery
■Removing the lower assy
■Removing the battery
■Removing the speaker
■Removing the touchpad buttons sub board
Required tools:
■Plastic tool
►Remove the orange antenna cable from the guides on the touchpad cover (red arrows).
►You can then remove the touchpad buttons from the device.
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