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

1

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/fix procedures involving disassembly or reassembly:

•Turn off 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 field 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.

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 off. 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 field 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 difficult 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 floor 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 field 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 field service kit

The components of an ESD field 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 office to find 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 different 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 office desks or cubicles. Always look for a large open flat 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

4 Working on your computer

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 field 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

1Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.

2Turn off your computer.

3If the computer is connected to a docking device (docked), undock it.

4Disconnect all network cables from the computer (if available).

CAUTION: If your computer has an RJ45 port, disconnect the network cable by first unplugging the cable from your computer.

5Disconnect your computer and all attached devices from their electrical outlets.

6Open the display.

7Press 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.

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.

1Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.

2Connect any telephone or network cables to your computer.

CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the computer.

3Connect your computer and all attached devices to their electrical outlets.

4Turn on your computer.

Working on your computer	5

2

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

Recommended tools

The procedures in this document require the following tools:

•Phillips #0 screwdriver

•Phillips #1 screwdriver

•Plastic scribe

NOTE: The #0 screw driver is for screws 0-1 and the #1 screw driver is for screws 2-4

6 Removing and installing components

Screw size list

Table 1. Latitude 7390Screw 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	M 2.0 x 2L	M 2 x 1.7L	M 1.98 x 4L	M 2.5 x 5
				K3.6D	K7D
Hinge
bracket to	6
Cover
G-sensor to			1
Cover
Lcm frame
down to			2
Cover
Hinge
bracket to		4
Low
Power Board			2
LED Board			2
Fingerprint			1
bracket
Touchpad			2
button
Smart Card					2
K/B to K/B				6
plate
K/B plate			13
Bottom Door								8
Assy
System			6
board
Fan			1		1
Thermal			4
Battery							4
WLAN			1
WWAN			1
EDP Bracket						2
USB Type C							2

Micro Secure Digital Card

Removing and installing components	7

Removing the Micro Secure Digital Card

1Follow the procedure in Before working inside your computer.

2Push the Micro Secure Digital (SD) card to release it from the computer.

3Slide the Micro Secure Digital (SD) card out of the computer.

Installing the Micro Secure Digital Card

1Slide the Micro SD into the slot until it clicks into place.

2Follow 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.

1Insert a pin or a micro SIM card removal tool into the pinhole on the micro SIM card tray.

2Use a scribe to pull the micro SIM card tray.

3If a micro SIM card is available, remove the micro SIM card from the micro SIM card tray.

Replacing SIM card

1Insert a paperclip or a SIM card removal tool into the pinhole on the SIM card tray.

2Use a scribe to pull the SIM card tray

3Place on the SIM card on the tray.

4Insert the SIM card tray into the slot.

Base cover

Removing the base cover

1Follow the procedure in Before working inside your computer.

2Loosen the 8 (M2.5 x 5.0) captive screws that secure the base cover to the computer.

8 Removing and installing components

3Use 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

1Align the base cover tabs to the slots on the edges of the computer.

2Press the edges of the cover until it clicks into place.

3Tighten the 8 (M2.5 x 5.0) captive screws to secure the base cover to the computer.

4Follow the procedure in After working inside your computer.

Battery

Removing the battery

1Follow the procedure in Before working inside your computer.

2Remove:

aMicroSD card

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler c Base cover

3 To remove the battery:

aLift the ribbon, disconnect and remove the battery cable from the connector on the system board [1].

bRemove the 4 (M1.98 x 4 L) screws that secure the battery to the computer [2].

cLift the battery from the computer [3].

10 Removing and installing components

Installing battery

1Insert the battery into the slot on the computer.

2Connect the battery cable to the connector on the system board.

3Replace the 4 (M1.98 x 4L) screws to secure the battery to the computer.

4Install the:

aBase cover

bSIM card tray

cMicroSD 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

1Follow the procedure in Before working inside your computer.

2Remove:

aMicroSD card

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler

cBase cover

dBattery

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

bLift the thermal plate from the SSD card [2].

cRemove the SSD card from the slot [3].

Installing the NVMe SSD

1Insert the NVMe SSD card into the connector.

2Install the thermal plate over the SSD card.

3Tighten the 2 (M2.0 x 3.0) screws to secure the SSD thermal plate.

4Install the:

aBattery

bBase cover

cSIM card tray

dMicroSD card

NOTE: To install both cards if equipped.

5 Follow the procedure in After working inside your computer.

WLAN card

Removing the WLAN card

1Follow the procedure in Before working inside your computer.

2Remove:

aMicroSD card

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler c Base cover

12 Removing and installing components

d Battery

3 To remove the WLAN card:

aRemove 1 (M2.0 x 3.0) screw that secures the wireless card bracket in place [1].

bLift the wireless card bracket [2].

cDisconnect the WLAN cables from the connectors on the WLAN card [3].

dRemove the WLAN card [4].

Installing the WLAN card

1Insert the WLAN card into the connector on the system board.

2Connect the WLAN cables to the connectors on the WLAN card.

3Place the wireless card bracket and replace 1 (M2.0 x 3.0) screw to secure WLAN card to the computer.

4Install the:

aBattery

bBase cover

cSIM card tray

dMicroSD card

NOTE: To install both cards if equipped.

5 Follow the procedure in After working inside your computer.

WWAN card

Removing the WWAN card

1Follow the procedure in Before working inside your computer.

2Remove:

Removing and installing components	13

aMicroSD card

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler

cBase cover

dBattery

3 To remove the WWAN card:

aRemove 1 (M2.0 x 3.0) screw that secures the WWAN card bracket in place [1].

bLift the WWAN card bracket that secures the WWAN card [2].

cDisconnect the WWAN cables from the connectors on the WWAN card [3].

dLift the WWAN card from the computer [4].

Installing the WWAN card

1Insert the WWAN card into the connector on the system board.

2Connect the WWAN cables to the connectors on the WWAN card.

3Place the metal bracket and replace the M2.0 x 3.0 screw to secure the WLAN card to the computer.

4Install the:

aBattery

bBase cover

cSIM card tray

dMicroSD card

NOTE: To install both cards if equipped.

5 Follow the procedure in After working inside your computer.

NOTE: The IMEI number can also be found on the WWAN card.

14 Removing and installing components

Power board

Removing the power board

1Follow the procedure in Before working inside your computer.

2Remove:

aMicroSD card

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler

cBase cover

dBattery

3 To remove the power board:

aPeel and flip over the coin cell battery [1].

bDisconnect the power daughter board cable from the system board [2].

cRemove the 2 (M2X3) screws securing the power board in place [3].

dLift the power board from the computer [4].

Installing the power board

1Place the power board by aligning it to the screw holes.

2Replace the 2 (M2.0x3.0) screws to secure the power board to the computer.

3Connect the power board cable to the connector on the system board.

4Affix the coin cell battery on the computer.

5Install the:

Removing and installing components	15

aBattery

bBase cover

cSIM card tray

dMicroSD card

NOTE: To install both cards if equipped.

6 Follow the procedure in After working inside your computer.

Speaker

Removing the speaker module

1Follow the procedure in Before working inside your computer.

2Remove:

aMicroSD card

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler

cBase cover

dBattery

ePower board

3 To disconnect the cables:

aDisconnect and fold back the smart card cable from the USH board [1].

bDisconnect 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:

aDisconnect the speaker cable from the connector on the system board [1].

bUn 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:

aUn route the speaker cable by removing the tapes near the palm rest [1].

bLift 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

1Place the speaker module into the slots on the computer.

2Route the speaker cable through the routing channel and secure it with the tapes.

3Connect the speaker cable to the connector on the system board.

4Connect the smart cable to the connector on the palm rest.

5Install the:

aPower board

bBattery

cBase cover

dSIM card tray

eMicro 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

NOTE: Always remove the smart card from the smart card reader.

1Follow the procedure in Before working inside your computer.

2Remove:

aMicro SD

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler

cBase cover

dBattery

eSSD card

3 To disconnect the cables:

aDisconnect the smart card cable [1].

bDisconnect the LED board cable [2].

cPeel the SSD thermal pad from the SSD slot [3].

NOTE: You may need to apply force to peel off the SSD thermal pad.

18 Removing and installing components

4 To remove the smart card cage:

aRemove the 2 (M2 x 2.0) screws that secure the smart card cage to the computer [1].

bSlide it out and lift the smart card cage from the computer [2].

Removing and installing components	19

Installing the smart card cage

1Slide the smart card cage into the slot to align with the screw holders on the computer.

2Replace the 2 (M2 x 2.0) screws to secure the smart card cage to the computer.

3Affix the thermal pad on the SSD module.

4Affix the LED board cable and connect it to the LED board on the computer.

5Affix the smart card cable and connect it to the USH board on the computer .

6Install the:

aSSD card

bbattery

cbase cover

dSIM card tray

eMicroSD card

NOTE: To install both cards if equipped.

7 Follow the procedure in After working inside your computer.

Fingerprint Board

Removing the fingerprint reader board

1Follow the procedure in Before working inside your computer.

2Remove:

aMicro SD

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler

cBase cover

dBattery

3 To remove the fingerprint reader board:

aLift the coin cell battery affixed to the speaker cables [1].

bDisconnect the finger print reader cables from the fingerprint reader board and the USH board [2].

NOTE: The cable should be released so that it does not tear.

cRemove 1(M2 x 3) screw that secures the fingerprint reader bracket to the computer [3].

dLift the fingerprint reader bracket from the fingerprint reader board [4].

eLift the fingerprint reader board from the slot on the computer.

NOTE: Fingerprint reader board is affixed to the palm rest and you may need a plastic scribe to lift the fingerprint reader board.

20 Removing and installing components

Installing the fingerprint reader board

1Install the fingerprint reader board into the slot.

2Place the fingerprint reader bracket on the board.

3Replace 1(M2 x 3) screw to secure the bracket to the board.

4Connect the fingerprint reader cable to the fingerprint reader board and the USH board.

5Affix the coin cell battery on the speaker cable

6Install the:

aBattery

bBase cover

cSIM card tray

dMicroSD card

NOTE: To install both cards if equipped.

7 Follow the procedure in After working inside your computer.

LED Board

Removing the LED board

1Follow the procedure in Before working inside your computer.

2Remove:

aMicro SD

bSIM card tray

NOTE: To remove both cards if equipped and no need to remove the blank filler

Removing and installing components	21

cBase cover

dBattery

3 To remove the LED board:

aDisconnect the LED board cable from the LED board [1].

bRemove the tape that secures the LED board to the touchpad panel [2].

cRemove the 2 (M2 x 3) screws that secure the LED board on the computer [3].

dLift the LED board from the computer [4].

Installing the LED board

1Install the LED board into the slot.

2Replace the 2 (M2 x 3) screws to secure the LED board.

3Affix the tape to secure the LED board.

4Connect the LED board cable to the LED board.

5Install the:

aBattery

bBase cover

cSIM card tray

dMicroSD card

NOTE: To install both cards if equipped.

6 Follow the procedure in After working inside your computer.

Heat Sink

22 Removing and installing components