Dell Latitude 7280 User manual

Dell Latitude 7280
Owner's Manual
Regulatory Model: P28S
Regulatory Type: P28S001

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2018 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks
may be trademarks of their respective owners.
2018 - 09
Rev. A05

Contents
1 Working on your computer............................................................................................................................. 6
Turning o your computer — Windows 10.....................................................................................................................6
Turning o your computer — Windows 8...................................................................................................................... 6
Turning o your computer — Windows 7...................................................................................................................... 6
Before working inside your computer..............................................................................................................................6
Safety instructions............................................................................................................................................................. 7
After working inside your computer.................................................................................................................................7
2 Disassembly and reassembly..........................................................................................................................8
Screw size list..................................................................................................................................................................... 8
Recommended tools.......................................................................................................................................................... 8
Subscriber Identication Module (SIM) card..................................................................................................................9
Removing SIM card or SIM card tray........................................................................................................................ 9
Replacing SIM card...................................................................................................................................................... 9
Base cover.......................................................................................................................................................................... 9
Removing base cover.................................................................................................................................................. 9
Installing base cover.................................................................................................................................................... 11
Battery............................................................................................................................................................................... 12
Lithium-ion battery precautions................................................................................................................................ 12
Removing battery....................................................................................................................................................... 12
Installing battery..........................................................................................................................................................13
PCIe Solid State Drive (SSD).......................................................................................................................................... 13
Removing PCIe SSD...................................................................................................................................................13
Installing PCIe SSD..................................................................................................................................................... 14
Speaker.............................................................................................................................................................................. 14
Removing speaker module.........................................................................................................................................14
Installing speaker module...........................................................................................................................................16
Coin-cell battery............................................................................................................................................................... 16
Removing the coin cell battery................................................................................................................................. 16
Installing coin cell battery...........................................................................................................................................17
WWAN card.......................................................................................................................................................................17
Removing WWAN card.............................................................................................................................................. 17
Installing WWAN card.................................................................................................................................................18
WLAN card........................................................................................................................................................................ 18
Removing WLAN card................................................................................................................................................18
Installing WLAN card..................................................................................................................................................19
Memory module............................................................................................................................................................... 20
Removing memory module....................................................................................................................................... 20
Installing memory module......................................................................................................................................... 20
Heat sink ........................................................................................................................................................................... 21
Removing heat sink assembly................................................................................................................................... 21
Installing heat sink assembly.....................................................................................................................................22
Power connector port..................................................................................................................................................... 22
Contents 3

Removing power connector port.............................................................................................................................22
Installing power connector port............................................................................................................................... 23
LED board......................................................................................................................................................................... 23
Removing LED board.................................................................................................................................................23
Installing LED board................................................................................................................................................... 24
Smart card module...........................................................................................................................................................24
Removing smart card cage....................................................................................................................................... 24
Installing smart card cage......................................................................................................................................... 26
Touchpad...........................................................................................................................................................................26
Removing touchpad buttons board......................................................................................................................... 26
Installing touchpad buttons board............................................................................................................................28
Display Assembly..............................................................................................................................................................28
Removing display assembly—with Touch...............................................................................................................28
Installing display assembly—with touch..................................................................................................................30
Removing display bezel............................................................................................................................................. 30
Installing display bezel.................................................................................................................................................31
Removing the display hinge cap................................................................................................................................31
Installing the display hinge cap................................................................................................................................. 32
Removing the display panel...................................................................................................................................... 32
Installing the display panel.........................................................................................................................................35
Camera..............................................................................................................................................................................35
Removing camera...................................................................................................................................................... 35
Installing camera.........................................................................................................................................................36
System board....................................................................................................................................................................37
Removing system board............................................................................................................................................ 37
Installing system board...............................................................................................................................................41
Keyboard assembly...........................................................................................................................................................41
Removing keyboard assembly...................................................................................................................................41
Installing keyboard assembly.....................................................................................................................................43
Keyboard lattice and Keyboard.......................................................................................................................................44
Removing keyboard from keyboard tray................................................................................................................. 44
Installing keyboard to keyboard tray........................................................................................................................ 44
Palm rest........................................................................................................................................................................... 44
Replacing palm rest .................................................................................................................................................. 44
3 System specications.................................................................................................................................. 46
Supported operating systems........................................................................................................................................ 46
Processor specications..................................................................................................................................................47
System specications...................................................................................................................................................... 47
Memory specications.................................................................................................................................................... 47
Storage specications..................................................................................................................................................... 47
Video specications......................................................................................................................................................... 47
Audio specications......................................................................................................................................................... 48
Battery specications......................................................................................................................................................48
AC adapter specications............................................................................................................................................... 49
Docking options................................................................................................................................................................49
Port and connector specications.................................................................................................................................49
4Contents

Communication specications....................................................................................................................................... 50
Camera specications..................................................................................................................................................... 50
Touchpad specications..................................................................................................................................................50
Display specications...................................................................................................................................................... 50
Physical specications.....................................................................................................................................................52
Environmental specications.......................................................................................................................................... 52
4 System Setup.............................................................................................................................................. 53
Boot menu........................................................................................................................................................................ 53
Navigation keys................................................................................................................................................................ 54
System setup options......................................................................................................................................................54
General screen options....................................................................................................................................................54
System Conguration screen options........................................................................................................................... 55
Video screen options....................................................................................................................................................... 57
Security screen options...................................................................................................................................................57
Secure Boot screen options........................................................................................................................................... 59
Intel software guard extensions screen options...........................................................................................................60
Performance screen options.......................................................................................................................................... 60
Power management screen options...............................................................................................................................61
POST behavior screen options.......................................................................................................................................62
Manageability................................................................................................................................................................... 63
Virtualization support screen options............................................................................................................................63
Wireless screen options...................................................................................................................................................63
Maintenance screen options...........................................................................................................................................64
System logs screen options............................................................................................................................................64
Updating the BIOS in Windows .................................................................................................................................... 65
System and setup password.......................................................................................................................................... 65
Assigning a system password and setup password...............................................................................................65
Deleting or changing an existing system and/or setup password....................................................................... 66
5 Troubleshooting........................................................................................................................................... 67
Enhanced Pre-Boot System Assessment (ePSA) diagnostics................................................................................... 67
Running the ePSA diagnostics................................................................................................................................. 67
6 Contacting Dell............................................................................................................................................ 68
Contents 5

Working on your computer
Turning o your computer — Windows 10
CAUTION: To avoid losing data, save and close all open les and exit all open programs before you turn o your computer.
1 Click or tap .
2 Click or tap and then click or tap Shut down.
NOTE: Ensure that the computer and all attached devices are turned o. If your computer and attached devices did not
automatically turn o when you shut down your operating system, press and hold the power button for about 6 seconds to
turn them o.
Turning o your computer — Windows 8
CAUTION: To avoid losing data, save and close all open les and exit all open programs before you turn o your computer.
1 Turning o your computer:
• In Windows 8 (using a touch enabled device):
1 Swipe in from the right edge of the screen, opening the Charms menu and select Settings.
2 Tap and then tap Shut down
• In Windows 8 (using a mouse):
1 Point to upper-right corner of the screen and click Settings.
2 Click and then click Shut down.
2 Ensure that the computer and all attached devices are turned o. If your computer and attached devices did not automatically turn o
when you shut down your operating system, press and hold the power button for about 6 seconds to turn them o.
Turning o your computer — Windows 7
CAUTION: To avoid losing data, save and close all open les and exit all open programs before you turn o your computer.
1 Click Start.
2 Click Shut Down.
NOTE: Ensure that the computer and all attached devices are turned o. If your computer and attached devices did not
automatically turn o when you shut down your operating system, press and hold the power button for about 6 seconds to
turn them o.
Before working inside your computer
1 Ensure that your work surface is at and clean to prevent the computer cover from being scratched.
2 Turn o your computer.
3 If the computer is connected to a docking device (docked), undock it.
4 Disconnect all network cables from the computer (if available).
1
6 Working on your computer

CAUTION: If your computer has an RJ45 port, disconnect the network cable by rst unplugging the cable from your
computer.
5 Disconnect your computer and all attached devices from their electrical outlets.
6 Open the display.
7 Press and hold the power button for few seconds, to ground the system board.
CAUTION: To guard against electrical shock unplug your computer from the electrical outlet before performing Step # 8.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an
unpainted metal surface at the same time as touching a connector on the back of the computer.
8 Remove any installed ExpressCards or Smart Cards from the appropriate slots.
Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise
noted, each procedure included in this document assumes that the following conditions exist:
• You have read the safety information that shipped with your computer.
• A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.
WARNING: Disconnect all power sources before opening the computer cover or panels. After you nish working inside the
computer, replace all covers, panels, and screws before connecting to the power source.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional
safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance
CAUTION: Many repairs may only be done by a certied service technician. You should only perform troubleshooting and simple
repairs as authorized in your product documentation, or as directed by the online or telephone service and support team.
Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions
that came with the product.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an
unpainted metal surface that is grounded to ground yourself before you touch the computer to perform any disassembly tasks.
CAUTION: 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.
CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have
connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the
cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a
cable, ensure that both connectors are correctly oriented and aligned.
NOTE: The color of your computer and certain components may appear dierently than shown in this document.
After working inside your computer
After you complete any replacement procedure, ensure that you connect external devices, cards, and cables before turning on your
computer.
CAUTION: 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.
1 Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.
2 Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, rst plug the cable into the network device and then plug it into the
computer.
3 Connect your computer and all attached devices to their electrical outlets.
4 Turn on your computer.
Working on your computer 7

Disassembly and reassembly
Screw size list
Table 1. Latitude 7280 - screw size list
Component M2.5 x 6 M2 x 5 M2.5 x
3.5 M2 x 3 M2.5 x 4 M2 x 2.5 M2 x 2
Back cover 8 (captive
screws)
Battery—3-cell 1
Battery—4-cell 2
SSD module 1
Heat sink module 4
System fan 2
Speaker 4
WWAN card 1
WLAN card 1
Power connector port 1
ESD bracket 1
EDP bracket 2
Touchpad buttons 2
Fingerprint reader 1
LED board 1
Smart card reader cage 2
Keyboard Lock bracket 1
Display hinge 6
Keyboard support plate 19
Keyboard 5
System board 9
Memory module bracket 1
Recommended tools
The procedures in this document require the following tools:
• Small at blade screwdriver
• Phillips # 1 screwdriver
2
8 Disassembly and reassembly

• Small plastic scribe
Subscriber Identication Module (SIM) card
Removing SIM card or SIM card tray
NOTE: SIM card or SIM card tray removal is only available on systems that are shipped with WWAN module. Hence, removing
procedure is only applicable for systems that are shipped with WWAN module.
CAUTION: Removing the SIM card when the computer is On, may cause data loss or damage the card. Ensure that your
computer is turned o or the network connections are disabled.
1 Insert a paperclip or a SIM card removal tool into the pinhole on the SIM card tray [1].
2 Use a scribe to pull the SIM card tray
3 Remove the SIM card, if a SIM card is available from the SIM card tray.
Replacing SIM card
NOTE: You can replace a SIM card only for those systems that are shipped with WWAN module.
1 Insert a paperclip or a SIM card removal tool into the pinhole on the SIM card tray.
2 Use a scribe to pull the SIM card tray.
3 Place on the SIM card on the tray.
4 Insert the SIM card tray into the slot.
Base cover
Removing base cover
1 Follow the procedure in Before working inside your computer.
2 To release the base cover:
a Loosen the M2.5 x 6 captive screws (8) that secure the base cover to the computer [1].
Disassembly and reassembly 9

NOTE: Exercise caution when loosening the screws. Angle the screwdriver to match the head of the front corners of
screw, to avoid a possible stripped screw head.
b Use a plastic scribe to release the base cover from the edge and lift it from the computer [2].
CAUTION: Exercise caution when loosening the screws. Angle the screwdriver to match the head of the screw (front
corners on the laptop base cover) to avoid a possible stripped screw head.
3 Lift the base cover from the computer.
10 Disassembly and reassembly

Installing base cover
1 Align the base cover tabs to the slots on the edges of the computer.
2 Press the edges of the cover until it clicks into place.
3 Tighten the M2.5 x 6.0 captive screws to secure the base cover to the computer.
Remember: Exercise caution when tightening the screws. Angle the screw driver to match the head of the screw to avoid a
possible stripped screw head.
4 Follow the procedure in After working inside your computer.
Disassembly and reassembly 11

Battery
Lithium-ion battery precautions
CAUTION:
• Exercise caution when handling Lithium-ion batteries.
• Discharge the battery as much as possible before removing it from the system. This can be done by disconnecting the AC adapter
from the system to allow the battery to drain.
• Do not crush, drop, mutilate, or penetrate the battery with foreign objects.
• Do not expose the battery to high temperatures, or disassemble battery packs and cells.
• Do not apply pressure to the surface of the battery.
• Do not bend the battery.
• Do not use tools of any kind to pry on or against the battery.
• If a battery gets stuck in a device as a result of swelling, do not try to free it as puncturing, bending, or crushing a Lithium-ion
battery can be dangerous. In such an instance, the entire system should be replaced. Contact https://www.dell.com/support for
assistance and further instructions.
• Always purchase genuine batteries from https://www.dell.com or authorized Dell partners and re-sellers.
Removing battery
1 Follow the procedure in Before working inside your computer.
2 Remove the base cover.
3 To remove the battery:
a Disconnect the battery cable from the connector on the system board [1].
b Remove the M2.0 x 5.0 screws that secure the battery to the computer [2].
NOTE: A 3-cell battery has a single screw, and a 4-cell battery has two screws. Hence, the image displayed below is a
4-cell battery.
c Lift the battery from the computer [3].
12 Disassembly and reassembly

Installing battery
1 Insert the battery into the slot on the computer.
2 Route the battery cable through the routing clip and connect the battery cable to the connector on the system board.
NOTE: Route the battery cable, if the cable at the base of the battery is un routed.
3 Tighten the M2.0 x 5.0 screws to secure the battery to the computer.
NOTE: A small battery (3-cell) has a single screw, a larger battery (4-cell) has two screws.
4 Install the base cover
5 Follow the procedure in After working inside your computer.
PCIe Solid State Drive (SSD)
Removing PCIe SSD
1 Follow the procedure in Before working inside your computer.
2 Remove the :
abase cover
bbattery
3 To remove the PCIe SSD:
a Loosen the M2 x3 captive screw that secure the SSD bracket [1].
b Remove the SSD bracket [2].
c Remove the PCIe SSD from the connector on the system board [3].
Disassembly and reassembly 13

Installing PCIe SSD
1 Insert the PCIe SSD card into the connector.
2 Install the SSD bracket over the PCIe SSD card.
NOTE: When installing the SSD bracket, ensure that the tab on the bracket is held securely with the tab on the palm rest.
NOTE: Ensure to install the bracket is the system is shipped with bracket.
3 Tighten the M2 x 3 screws to secure it the SSD bracket.
4 Install the
abattery
bbase cover
5 Follow the procedure in After working iinside your computer.
Speaker
Removing speaker module
1 Follow the procedure in Before working inside your computer.
2 Remove the:
14 Disassembly and reassembly

abase cover
bbattery
3 To release the speaker module:
a Push to disconnect the speaker cable from the connector on the system board [1].
NOTE: Ensure to unroute the speaker cable from the routing clip.
NOTE: Use a plastic scribe to release the cable from the connector. Do not pull the cable as it may result in breakage.
b Un-route the speaker cable from the routing clips [2].
c Remove the tape that secures the speaker cables to the touchpad board [3].
4 To remove the speaker module:
a Remove the M2.0x3.0 screws (4) that secure the speaker module to the computer [1].
b Remove the M2.0x3.0 screws that secure the speaker module to the computer [1].
NOTE: Refer the speaker screw list
c Lift the speaker module from the computer [2].
NOTE: Ensure to un-route the speaker cable from the routing clips.
Disassembly and reassembly 15

Installing speaker module
1 Place the speaker module into the slots on the computer.
2 Tighten the M2.0x3.0 screws to secure the speaker to the computer.
3 Route the speaker cable through the retention clips on the computer.
4 Connect the speaker cable to the connector on the system board.
5 Install the:
abattery
bbase cover
6 Follow the procedure in After working inside your computer.
Coin-cell battery
Removing the coin cell battery
1 Follow the procedure in Before working inside your computer.
2 Remove the :
abase cover
bbattery
3 To remove the coin cell battery:
a Disconnect the coin cell battery cable from the connector on the system board [1].
b Lift the coin cell battery to release it from the adhesive [2].
16 Disassembly and reassembly

Installing coin cell battery
1 Ax the coin cell battery on the slot inside the computer.
2 Route the coin cell battery cable through the routing channel before connecting the cable.
3 Connect the coin cell battery cable to the connector on the system board.
4 Install the :
abattery
bbase cover
5 Follow the procedure in After working inside your computer.
WWAN card
Removing WWAN card
1 Follow the procedure in Before working inside your computer.
2 Remove the :
abase cover
bbattery
3 To remove the WWAN card:
a Remove the M2.0 x 3.0 screw that secures the metal bracket to the WWAN card [1].
b Lift the metal bracket that secures the WWAN card [2].
Disassembly and reassembly 17

c Disconnect the WWAN cables from the connectors on the WWAN card with a plastic scribe.[3].
d [4].
Installing WWAN card
1 Insert the WWAN card into the connector on the system board.
2 Connect the WWAN cables to the connectors on the WWAN card.
3 Place the metal bracket and tighten the M2.0 x 3.0 screw to secure it to the computer.
4 Install the :
abattery
bbase cover
5 Follow the procedure in After working inside your computer.
NOTE: The IMEI number can also be found on the WWAN card.
WLAN card
Removing WLAN card
1 Follow the procedure in Before working inside your computer.
2 Remove the :
abase cover
18 Disassembly and reassembly

bbattery
3 To remove the WLAN card:
a Remove the M2.0 x 3.0 screw that secures the metal bracket to the WLAN card [1].
b Lift the metal bracket [2].
c Disconnect the WLAN cables from the connectors on the WLAN card [3].
d Remove the WLAN card from the computer [4].
NOTE: Ensure NOT to pull the WLAN card more than 35°, to avoid damage to pin.
Installing WLAN card
1 Insert the WLAN card into the connector on the system board.
2 Connect the WLAN cables to the connectors on the WLAN card.
3 Place the metal bracket and tighten the M2.0 x 3.0 screw to secure it to the computer.
4 Install the .:
abattery
bbase cover
5 Follow the procedure in After working inside your computer.
Disassembly and reassembly 19

Memory module
Removing memory module
1 Follow the procedure in Before working inside your computer.
2 Remove the :
abase cover
bbattery
3 To remove the memory module:
a Pull the clips securing the memory module until the module snaps-out [1].
b Remove the memory module from the connector on the system board [2].
Installing memory module
1 Insert the memory module into the connector until snaps in.
2 Install the :
abattery
bbase cover
3 Follow the procedures in After working inside your computer.
20 Disassembly and reassembly