Dell Latitude 7320 Detachable User manual

Latitude 7320 Detachable
Service Manual
Regulatory Model: T04H
Regulatory Type: T04H001
August 2021
Rev. A01

  
:
:

:  
© 2021 Dell Inc.  Dell, EMC    Dell Inc. 
  

Chapter 1: ...............................................................................6
.........................................................................................................................6
................................................................................................................................................ 6
 —  ESD...........................................................................................................................7
 ESD........................................................................................................................................................................ 7
......................................................................................................................... 8
Chapter 2: .............................................................................................. 9
.................................................................................................................................................................... 9
..............................................................................................................................................................................9
 Subscriber Identity Module (SIM)........................................................................................................................ 11
........................................................................................................................................................ 11
......................................................................................................................................................12
...................................................................................................................................................................... 13
Removing the display assembly................................................................................................................................ 13
Installing the display assembly...................................................................................................................................17
 .....................................................................................................................................................................21
 M.2.........................................................................................................................................21
 M.2...................................................................................................................................... 22
 WWAN....................................................................................................................................................................... 24
 WWAN.................................................................................................................................................... 24
Installing the WWAN card......................................................................................................................................... 25
.....................................................................................................................................................................................26
................................................................................................................................................... 26
..................................................................................................................................................27
....................................................................................................................................................28
................................................................................................................................................. 29
................................................................................................................................................................................30
............................................................................................................................................................ 30
...........................................................................................................................................................31
................................................................................................................................................................... 33
Removing the right microphone modules..............................................................................................................33
Installing the right microphone modules................................................................................................................ 33
Removing the left microphone module.................................................................................................................. 34
Installing the left microphone modules.................................................................................................................. 35
............................................................................................................................................................................... 36
............................................................................................................................................................36
..........................................................................................................................................................37
.......................................................................................................................................................................................37
Removing the Kick stand........................................................................................................................................... 37
Installing the kick stand..............................................................................................................................................38
..........................................................................................................................................................................40
Removing the kick stand hinges.............................................................................................................................. 40
Installing the kick stand hinges................................................................................................................................ 40
Contents
Contents 3

.................................................................................................................................................................... 41
Removing the docking connector............................................................................................................................ 41
..............................................................................................................................................42
 Hall......................................................................................................................................... 44
 Hall......................................................................................................................44
 Hall....................................................................................................................44
............................................................................................................................................................. 45
Removing the heat sink............................................................................................................................................. 45
........................................................................................................................................46
............................................................................................................................................................................48
.................................................................................................................................................... 48
Installing the left fan...................................................................................................................................................49
...........................................................................................................................................50
...................................................................................................................................................51
 ................................................................................................................................... 51
 ................................................................................................................ 51
 ............................................................................................................. 52
  ................................................................................................................................................................ 53
Removing the power-button board........................................................................................................................ 53
Installing the power-button board...........................................................................................................................54
.............................................................................................................................................................. 55
.......................................................................................................................................... 55
........................................................................................................................................ 56
............................................................................................................................................................................... 57
 -.......................................................................................................... 57
............................................................................................................................................................58
..........................................................................................................................................................59
...................................................................................................................................................................... 60
Removing the system board..................................................................................................................................... 60
Installing the system board....................................................................................................................................... 62
............................................................................................................................................................. 65
...................................................................................................................................... 65
.................................................................................................................................... 66
Chapter 3: ..................................................................................................................... 69
..................................................................................................................................................................... 69
........................................................................................................................................................69
Chapter 4: System setup ()....................................................................................... 70
 BIOS...................................................................................................................................................................... 70
 BIOS.......................................................................................................................................70
 System setup........................................................................................................................................................70
....................................................................................................................................................... 70
..................................................................................................................................71
................................................................................................................................. 72
........................................................................................................................................................ 74
..........................................................................................................................................74
............................................................................................................................................................. 75
 Intel Software Guard................................................................................................................................. 76
4Contents

............................................................................................................................................76
.................................................................................................................................. 76
 POST............................................................................................................................................................ 77
............................................................................................................................... 78
...................................................................................................................................................... 78
..........................................................................................................................................................................78
............................................................................................................................................. 79
 BIOS................................................................................................................................................................ 79
 BIOS  Windows.................................................................................................................................. 79
 BIOS  USB  Windows...................................................................................................... 79
 BIOS  F12 ...........................................................................................................80
...................................................................................................................................................81
Assigning a system setup password........................................................................................................................ 81
 system setup ..........................................................................................................81
 BIOS () .................................................................................... 82
Chapter 5: ..................................................................................................................83
.........................................................................................................................83
 pre-boot  Dell SupportAssist......................................................84
 pre-boot  SupportAssist...............................84
Built-in self-test (BIST)................................................................................................................................................... 84
M-BIST...........................................................................................................................................................................84
LCD Power rail test (L-BIST)................................................................................................................................... 85
LCD Built-in Self Test (BIST)................................................................................................................................... 85
.............................................................................................................................................................. 86
....................................................................................................................................................... 87
.................................................................................................................................87
 WiFi................................................................................................................................................................ 87
.................................................................................................................................................................. 88
Chapter 6:  Dell.................................................................................... 89
Contents 5


 :
•
•
• —  ESD
• ESD
•


: 

1.     
2.     >   >  
: 
3. 
4.       
:  
5.  


/:
● 
● AC
●
● ESD     (ESD)
●   
●  

 Dell     
  (  LAN) 
  /  20  
1
6


      (ESD)
  
     

 —  ESD
ESD     
 DIMM      
    ESD  

 Dell  
 Dell    
 ESD   
● –   20  ESD 
  DIMM   
 “No POST/No Video” 
● –   80  ESD 
  DIMM   
 
     

 (  “”)
  ESD:
● ESD     
      ESD 
  ESD 
●        

●    
     
●    
 ESD
  :
    
 ESD 
 ESD :
●   –       
      
    ESD 
   ESD    ESD  
● –  
   ESD     
   ESD  
      
 
 ESD  

 7

● ESD –  
     
   
    
  LED   LED 
●–  ESD   
 
● –  ESD    
  
  
   ESD 
  ESD  
 Styrofoam    12  30  
 
● ESD –  ESD   
     ESD  
  ESD   ESD 
  ESD    ESD   
   ESD    
●  –  ESD   Dell  
  
  ESD
 ESD     Dell
     
   


:

1. 
2.    
3.    
4. 
5.  
8


: 
 :
•
•
• Subscriber Identity Module (SIM)
•
•
• WWAN
•
•
•
•
•
•
•
• Hall
•
•
• 
•  
•
•
•
•

 :
● Phillips #0
●

:  
 
:  
: 
 1.   5520 3560
   
  8
 WLAN  1
2
 9

 1.   5520 3560 ()
   
 WWAN  1
 M.2 2230 M2x4 1
 M.2 2280 M2x4 1
 M2x3 12
 3  M2x4 2
 4  M2x4 3
 M2x3 2
— M2x3

1 - M2x3
4 - 
—
 M2x3

1 - M2x3
7 - 
/ eDP M2x3 2
 USB Type-C M2x4 3
 M2x3 3
    M2x2 2
 M2x3 2
 LED M2x3 1
  M2x2 26
  M2x2 10
 M2.5x5 (
 )
6
 M2.5x3.5
(
)
4
 M2.5x3.5 4
10 

 Subscriber Identity Module (SIM)


1.  
: WWAN 
 WWAN 
:  
   



1. 
2. 
3. 
4. 
5.  
 11



 
: WWAN 
 WWAN 



1.  
2. 
3. 
4.  
5.  

1.  
12 


Removing the display assembly
Prerequisites
1. Follow the procedure in Before working inside your system.
2. Remove the SIM tray.
About this task
The following images indicate the location of the display assembly and provide a visual representation of the removal procedure.
 13

14 

 15

Steps
1. Open the kick stand to the widest possible angle, the system will power on.
NOTE: The Latitude 7320 Detachable has an automatic power-on feature. The system powers on anytime the kick
stand is opened. Follow the below steps to ensure that the system does not power on while the performing replacement
procedures.
2. With the kick stand open, shut down the computer using the operating system.
3. Place the system on a padded surface with the display assembly facing down.
16 

4. CAUTION: Make sure that the system has already been powered off before removing the screws.
Remove the four (M1.6x4) screws securing the display panel to the display back cover.
5. Using a plastic scribe, push the two release holes next to the kick stand hinges to loosen the display assembly from the
display back cover.
6. Close the kick stand and flip the computer over with the display facing upwards.
7. Using a plastic scribe, pry open the display panel from the bottom-left or bottom-right corner.
8. Work your way around the top and remaining sides of the display panel.
9. Gently flip open the display assembly from the top edge and lay the display panel assembly face down.
CAUTION: Do NOT pull the display panel away from the base while the display panel is still connected to the
system board.
10. Slide the power switch on the system board from "PD1" to "PD2".
NOTE: After switching the power switch off, an LED indicator next to the switch will illuminate red, indicating that
power has been cut-off from the computer.
11. Remove the two (M2x2.5) screws that secure the display cable bracket to the system board.
12. Remove the display cable bracket from the computer.
13. Disconnect the display cable from the system board and remove the display assembly from the computer.
Installing the display assembly
Prerequisites
 
About this task
The following image indicates the location of the display assembly and provides a visual representation of the installation
procedure.
 17

18 

 19

20 