Dell 6JGFC Getting Started Guide
Latitude 7390 2-in-1
Owner's Manual
Regulatory Model: P29S
Regulatory Type: P29S002
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.
Copyright © 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 - 01
Rev. A01
Working on your computer
Topics:
• Safety precautions
• Before working inside your computer
• After working inside your computer
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break/x procedures involving disassembly or reassembly:
• Turn o the system and all attached peripherals.
• Disconnect the system and all attached peripherals from AC power.
• Disconnect all network cables, telephone, and telecommunications lines from the system.
• Use an ESD eld service kit when working inside any notebook to avoid electrostatic discharge (ESD) damage.
• After removing any system component, carefully place the removed component on an anti-static mat.
• Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted.
1
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are essentially
powered while turned o. The internal power enables the system to be remotely turned on (wake on LAN) and suspended into a sleep
mode and has other advanced power management features.
Unplugging, pressing and holding the power button for 15 seconds should discharge residual power in the system board, notebooks
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through the use of a
eld service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare metal and never to a
painted or non-metal surface. The wrist strap should be secure and in full contact with your skin, and ensure that you remove all jewelry
such as watches, bracelets, or rings prior to bonding yourself and the equipment.
Electrostatic discharge — ESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards, processors,
memory DIMMs, and system boards. Very slight charges can damage circuits in ways that may not be obvious, such as intermittent
problems or a shortened product life span. As the industry pushes for lower power requirements and increased density, ESD protection is an
increasing concern.
Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous
Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.
Working on your computer 3
Two recognized types of ESD damage are catastrophic and intermittent failures.
• Catastrophic – Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes an immediate and
complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has received a static shock and
immediately generates a "No POST/No Video" symptom with a beep code emitted for missing or nonfunctional memory.
• Intermittent – Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of intermittent failures
means that most of the time when damage occurs, it is not immediately recognizable. The DIMM receives a static shock, but the
tracing is merely weakened and does not immediately produce outward symptoms related to the damage. The weakened trace may
take weeks or months to melt, and in the meantime may cause degradation of memory integrity, intermittent memory errors, etc.
The more dicult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded") failure.
Perform the following steps to prevent ESD damage:
• Use a wired ESD wrist strap that is properly grounded. The use of wireless anti-static straps is no longer allowed; they do not provide
adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on parts with increased
sensitivity to ESD damage.
• Handle all static-sensitive components in a static-safe area. If possible, use anti-static oor pads and workbench pads.
• When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti-static packing
material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you discharge static
electricity from your body.
• Before transporting a static-sensitive component, place it in an anti-static container or packaging.
ESD eld service kit
The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components: anti-static
mat, wrist strap, and bonding wire.
Components of an ESD eld service kit
The components of an ESD eld service kit are:
• Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures. When using an anti-static
mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal on the system being
worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly on the mat. ESD-sensitive
items are safe in your hand, on the ESD mat, in the system, or inside a bag.
• Wrist Strap and Bonding Wire – The wrist strap and bonding wire can be either directly connected between your wrist and bare metal
on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that is temporarily placed on
the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD mat, and the hardware is known as
bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never use wireless wrist straps. Always be aware that the
internal wires of a wrist strap are prone to damage from normal wear and tear, and must be checked regularly with a wrist strap tester
in order to avoid accidental ESD hardware damage. It is recommended to test the wrist strap and bonding wire at least once per week.
• ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored kit, it is a best
practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A wrist strap tester is the best
method for doing this test. If you do not have your own wrist strap tester, check with your regional oce to nd out if they have one.
To perform the test, plug the wrist-strap's bonding-wire into the tester while it is strapped to your wrist and push the button to test. A
green LED is lit if the test is successful; a red LED is lit and an alarm sounds if the test fails.
• Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts that are
insulators and often highly charged.
• Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. For example,
deploying the kit for a server environment is dierent than for a desktop or portable environment. Servers are typically installed in a rack
within a data center; desktops or portables are typically placed on oce desks or cubicles. Always look for a large open at work area
that is free of clutter and large enough to deploy the ESD kit with additional space to accommodate the type of system that is being
repaired. The workspace should also be free of insulators that can cause an ESD event. On the work area, insulators such as Styrofoam
and other plastics should always be moved at least 12 inches or 30 centimeters away from sensitive parts before physically handling any
hardware components
• ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded bags are
preferred. However, you should always return the damaged part using the same ESD bag and packaging that the new part arrived in.
The ESD bag should be folded over and taped shut and all the same foam packing material should be used in the original box that the
new part arrived in. ESD-sensitive devices should be removed from packaging only at an ESD-protected work surface, and parts should
Working on your computer
4
never be placed on top of the ESD bag because only the inside of the bag is shielded. Always place parts in your hand, on the ESD mat,
in the system, or inside an anti-static bag.
• Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts to be
returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
ESD protection summary
It is recommended that all eld service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all
times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while
performing service and that they use anti-static bags for transporting sensitive components.
Transporting sensitive components
When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in
anti-static bags for safe transport.
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).
CAUTION
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
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.
: If your computer has an RJ45 port, disconnect the network cable by rst unplugging the cable from your
: To guard against electrical shock unplug your computer from the electrical outlet before performing Step # 8.
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
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.
3 Connect your computer and all attached devices to their electrical outlets.
4 Turn on your computer.
: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries
CAUTION
computer.
: To connect a network cable, rst plug the cable into the network device and then plug it into the
Working on your computer
5
Removing and installing components
Topics:
• Recommended tools
• Screw size list
• Micro Secure Digital Card
• Subscriber Identity Module SIM Card
• Base cover
• Battery
• PCIe Solid State Drive (SSD)
• WLAN card
• WWAN card
• Power board
• Speaker
• Smart Card Cage
• Fingerprint Board
• LED Board
• Heat Sink
• Display Assembly
• System Board
• Real time clock
• Keyboard
• Touchpad Buttons
• Palm rest
2
Recommended tools
The procedures in this document require the following tools:
• Phillips #0 screwdriver
• Phillips #1 screwdriver
• Plastic scribe
: The #0 screw driver is for screws 0-1 and the #1 screw driver is for screws 2-4
NOTE
6 Removing and installing components
Screw size list
Table 1. Latitude 7390- Screw size list
Component M 2.5 x 2.5L M 2.5 x 4.0L M 2.0 x 3.0L M 2 x 2L
K3.6D
Hinge
bracket to
Cover
G-sensor to
Cover
Lcm frame
down to
Cover
Hinge
bracket to
Low
Power Board 2
LED Board 2
Fingerprint
bracket
Touchpad
button
Smart Card 2
K/B to K/B
plate
6
1
2
4
1
2
6
M 2.0 x 2L
K7D
M 2 x 1.7L M 1.98 x 4L M 2.5 x 5
K/B plate 13
Bottom Door
Assy
System
board
Fan 1 1
Thermal 4
Battery 4
WLAN 1
WWAN 1
EDP Bracket 2
USB Type C 2
6
Micro Secure Digital Card
8
Removing and installing components
7
Removing the Micro Secure Digital Card
1 Follow the procedure in Before working inside your computer.
2 Push the Micro Secure Digital (SD) card to release it from the computer.
3 Slide the Micro Secure Digital (SD) card out of the computer.
Installing the Micro Secure Digital Card
1 Slide the Micro SD into the slot until it clicks into place.
2 Follow the procedures in After working inside your computer.
Subscriber Identity Module SIM Card
Removing the micro SIM card or the micro SIM card tray
CAUTION: Removing the micro SIM card when the computer is on may cause data loss or damage the card.
NOTE: Micro SIM card tray is available only for systems that are shipped with WWAN card.
1 Insert a pin or a micro SIM card removal tool into the pinhole on the micro SIM card tray.
2 Use a scribe to pull the micro SIM card tray.
3 If a micro SIM card is available, remove the micro SIM card from the micro SIM card tray.
Replacing SIM card
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 the base cover
1 Follow the procedure in Before working inside your computer.
2 Loosen the 8 (M2.5 x 5.0) captive screws that secure the base cover to the computer.
Removing and installing components
8
3 Use a plastic scribe to pry the base cover starting from the hinges at the top edge of the base cover and lift it from the computer.
NOTE
: The recesses are located near the hinges at the rear side of the computer.
4 Remove the base cover
Removing and installing components
9
Installing the 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 8 (M2.5 x 5.0) captive screws to secure the base cover to the computer.
4 Follow the procedure in After working inside your computer.
Battery
Removing the battery
1 Follow the procedure in Before working inside your computer.
2 Remove:
a MicroSD card
b SIM card tray
: To remove both cards if equipped and no need to remove the blank ller
NOTE
c Base cover
3 To remove the battery:
a Lift the ribbon, disconnect and remove the battery cable from the connector on the system board [1].
b Remove the 4 (M1.98 x 4 L) screws that secure the battery to the computer [2].
c Lift the battery from the computer [3].
10
Removing and installing components
Installing battery
1 Insert the battery into the slot on the computer.
2 Connect the battery cable to the connector on the system board.
3 Replace the 4 (M1.98 x 4L) screws to secure the battery to the computer.
4 Install the:
a Base cover
b SIM card tray
c MicroSD card
NOTE
: To install both cards if equipped.
5 Follow the procedure in After working inside your computer.
PCIe Solid State Drive (SSD)
Removing the NVMe SSD card
1 Follow the procedure in Before working inside your computer.
2 Remove:
a MicroSD card
b SIM card tray
: To remove both cards if equipped and no need to remove the blank ller
NOTE
c Base cover
d Battery
3 To remove the NVMe SSD card:
a Loosen the 2 (M2.0 x 3.0) screws that secure SSD thermal plate in place [1].
Removing and installing components
11
b Lift the thermal plate from the SSD card [2].
c Remove the SSD card from the slot [3].
Installing the NVMe SSD
1 Insert the NVMe SSD card into the connector.
2 Install the thermal plate over the SSD card.
3 Tighten the 2 (M2.0 x 3.0) screws to secure the SSD thermal plate.
4 Install the:
a Battery
b Base cover
c SIM card tray
d MicroSD card
NOTE
: To install both cards if equipped.
5 Follow the procedure in After working inside your computer.
WLAN card
Removing the WLAN card
1 Follow the procedure in Before working inside your computer.
2 Remove:
a MicroSD card
b SIM card tray
c Base cover
12
: To remove both cards if equipped and no need to remove the blank ller
NOTE
Removing and installing components
d Battery
3 To remove the WLAN card:
a Remove 1 (M2.0 x 3.0) screw that secures the wireless card bracket in place [1].
b Lift the wireless card bracket [2].
c Disconnect the WLAN cables from the connectors on the WLAN card [3].
d Remove the WLAN card [4].
Installing the 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 wireless card bracket and replace 1 (M2.0 x 3.0) screw to secure WLAN card to the computer.
4 Install the:
a Battery
b Base cover
c SIM card tray
d MicroSD card
: To install both cards if equipped.
NOTE
5 Follow the procedure in After working inside your computer.
WWAN card
Removing the WWAN card
1 Follow the procedure in Before working inside your computer.
2 Remove:
Removing and installing components
13
a MicroSD card
b SIM card tray
NOTE: To remove both cards if equipped and no need to remove the blank ller
c Base cover
d Battery
3 To remove the WWAN card:
a Remove 1 (M2.0 x 3.0) screw that secures the WWAN card bracket in place [1].
b Lift the WWAN card bracket that secures the WWAN card [2].
c Disconnect the WWAN cables from the connectors on the WWAN card [3].
d Lift the WWAN card from the computer [4].
Installing the 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 replace the M2.0 x 3.0 screw to secure the WLAN card to the computer.
4 Install the:
a Battery
b Base cover
c SIM card tray
d MicroSD card
: To install both cards if equipped.
NOTE
5 Follow the procedure in After working inside your computer.
: The IMEI number can also be found on the WWAN card.
NOTE
14 Removing and installing components
Power board
Removing the power board
1 Follow the procedure in Before working inside your computer.
2 Remove:
a MicroSD card
b SIM card tray
NOTE: To remove both cards if equipped and no need to remove the blank ller
c Base cover
d Battery
3 To remove the power board:
a Peel and ip over the coin cell battery [1].
b Disconnect the power daughter board cable from the system board [2].
c Remove the 2 (M2X3) screws securing the power board in place [3].
d Lift the power board from the computer [4].
Installing the power board
1 Place the power board by aligning it to the screw holes.
2 Replace the 2 (M2.0x3.0) screws to secure the power board to the computer.
3 Connect the power board cable to the connector on the system board.
4 Ax the coin cell battery on the computer.
5 Install the:
Removing and installing components
15
a Battery
b Base cover
c SIM card tray
d MicroSD card
NOTE: To install both cards if equipped.
6 Follow the procedure in After working inside your computer.
Speaker
Removing the speaker module
1 Follow the procedure in Before working inside your computer.
2 Remove:
a MicroSD card
b SIM card tray
NOTE: To remove both cards if equipped and no need to remove the blank ller
c Base cover
d Battery
e Power board
3 To disconnect the cables:
a Disconnect and fold back the smart card cable from the USH board [1].
b Disconnect and fold back the LED daughter board FFC from the LED daughter board for easy access in removing the speaker
module [2].
4 To release the speaker module:
a Disconnect the speaker cable from the connector on the system board [1].
b Un route the speaker cable from the retention clips and remove the tapes that secure the speaker cable [2].
16
Removing and installing components
5 To remove the speaker module:
a Un route the speaker cable by removing the tapes near the palm rest [1].
b Lift the speaker module from the computer.
NOTE
: You can use a plastic scribe to lift the speaker module from the computer.
Removing and installing components 17
Installing the speaker module
1 Place the speaker module into the slots on the computer.
2 Route the speaker cable through the routing channel and secure it with the tapes.
3 Connect the speaker cable to the connector on the system board.
4 Connect the smart cable to the connector on the palm rest.
5 Install the:
a Power board
b Battery
c Base cover
d SIM card tray
e Micro SD
NOTE: To install both cards if equipped.
6 Follow the procedure in After working inside your computer.
Smart Card Cage
Removing the smart card cage
: Always remove the smart card from the smart card reader.
NOTE
1 Follow the procedure in Before working inside your computer.
2 Remove:
a Micro SD
b SIM card tray
NOTE
: To remove both cards if equipped and no need to remove the blank ller
c Base cover
d Battery
e SSD card
3 To disconnect the cables:
a Disconnect the smart card cable [1].
b Disconnect the LED board cable [2].
c Peel the SSD thermal pad from the SSD slot [3].
NOTE
: You may need to apply force to peel o the SSD thermal
pad.
18 Removing and installing components
4 To remove the smart card cage:
a Remove the 2 (M2 x 2.0) screws that secure the smart card cage to the computer [1].
b Slide it out and lift the smart card cage from the computer [2].
Removing and installing components
19
Installing the smart card cage
1 Slide the smart card cage into the slot to align with the screw holders on the computer.
2 Replace the 2 (M2 x 2.0) screws to secure the smart card cage to the computer.
3 Ax the thermal pad on the SSD module.
4 Ax the LED board cable and connect it to the LED board on the computer.
5 Ax the smart card cable and connect it to the USH board on the computer .
6 Install the:
a SSD card
b battery
c base cover
d SIM card tray
e MicroSD card
NOTE: To install both cards if equipped.
7 Follow the procedure in After working inside your computer.
Fingerprint Board
Removing the ngerprint reader board
1 Follow the procedure in Before working inside your computer.
2 Remove:
a Micro SD
b SIM card tray
NOTE
: To remove both cards if equipped and no need to remove the blank ller
c Base cover
d Battery
3 To remove the ngerprint reader board:
a Lift the coin cell battery axed to the speaker cables [1].
b Disconnect the nger print reader cables from the ngerprint reader board and the USH board [2].
NOTE
: The cable should be released so that it does not tear.
c Remove 1(M2 x 3) screw that secures the ngerprint reader bracket to the computer [3].
d Lift the ngerprint reader bracket from the ngerprint reader board [4].
e Lift the ngerprint reader board from the slot on the computer.
NOTE
: Fingerprint reader board is axed to the palm rest and you may need a plastic scribe to lift the ngerprint
reader board.
20 Removing and installing components
Installing the ngerprint reader board
1 Install the ngerprint reader board into the slot.
2 Place the ngerprint reader bracket on the board.
3 Replace 1(M2 x 3) screw to secure the bracket to the board.
4 Connect the ngerprint reader cable to the ngerprint reader board and the USH board.
5 Ax the coin cell battery on the speaker cable
6 Install the:
a Battery
b Base cover
c SIM card tray
d MicroSD card
NOTE
: To install both cards if equipped.
7 Follow the procedure in After working inside your computer.
LED Board
Removing the LED board
1 Follow the procedure in Before working inside your computer.
2 Remove:
a Micro SD
b SIM card tray
: To remove both cards if equipped and no need to remove the blank ller
NOTE
Removing and installing components 21
c Base cover
d Battery
3 To remove the LED board:
a Disconnect the LED board cable from the LED board [1].
b Remove the tape that secures the LED board to the touchpad panel [2].
c Remove the 2 (M2 x 3) screws that secure the LED board on the computer [3].
d Lift the LED board from the computer [4].
Installing the LED board
1 Install the LED board into the slot.
2 Replace the 2 (M2 x 3) screws to secure the LED board.
3 Ax the tape to secure the LED board.
4 Connect the LED board cable to the LED board.
5 Install the:
a Battery
b Base cover
c SIM card tray
d MicroSD card
: To install both cards if equipped.
NOTE
6 Follow the procedure in After working inside your computer.
Heat Sink
22
Removing and installing components
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