Dell Latitude 5285 User manual

Latitude 5285 2-in-1
Owner's Manual
Regulatory Model: T17G
Regulatory Type: T17G001
March 2022
Rev. A03

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.
© 2016-2022 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.

Chapter 1: System specifications.................................................................................................. 6
Processor specifications.................................................................................................................................................... 6
System specifications......................................................................................................................................................... 6
Memory specifications....................................................................................................................................................... 6
Video specifications.............................................................................................................................................................7
Audio specifications.............................................................................................................................................................7
Port and connector specifications...................................................................................................................................7
Communication specifications.......................................................................................................................................... 8
Camera specifications........................................................................................................................................................ 8
Display specifications..........................................................................................................................................................8
AC adapter specifications..................................................................................................................................................9
Battery specifications.........................................................................................................................................................9
Physical specifications...................................................................................................................................................... 10
Environmental specifications.......................................................................................................................................... 10
Chapter 2: Using your tablet.........................................................................................................11
Screw list.............................................................................................................................................................................. 11
Recommended tools..........................................................................................................................................................12
Deploying the kickstand....................................................................................................................................................12
Before Working Inside Your Tablet................................................................................................................................ 13
Turning off your tablet — Windows 10.................................................................................................................. 13
After working inside your tablet..................................................................................................................................... 14
micro SD - micro SIM card.............................................................................................................................................. 14
Display Panel and display cable.......................................................................................................................................16
Removing the display panel and display cable ..................................................................................................... 16
Installing the display panel......................................................................................................................................... 19
Removing the display cable ...................................................................................................................................... 19
Installing the display cable.........................................................................................................................................20
PCIe Solid State Drive (SSD)......................................................................................................................................... 20
Removing the SSD module........................................................................................................................................20
Installing SSD module..................................................................................................................................................21
WLAN card.......................................................................................................................................................................... 21
Removing the WLAN card..........................................................................................................................................21
Installing the WLAN card........................................................................................................................................... 22
Speaker................................................................................................................................................................................ 23
Removing the speaker................................................................................................................................................23
Installing speaker......................................................................................................................................................... 23
Battery................................................................................................................................................................................. 24
Lithium-ion battery precautions...............................................................................................................................24
Removing the battery.................................................................................................................................................24
Installing the battery...................................................................................................................................................25
System fan..........................................................................................................................................................................25
Removing the system fan..........................................................................................................................................25
Installing the system fan............................................................................................................................................26
Contents
Contents 3

Heat sink ............................................................................................................................................................................ 26
Removing heat sink assembly...................................................................................................................................26
Installing heat sink assembly..................................................................................................................................... 28
Front facing camera......................................................................................................................................................... 28
Removing front camera............................................................................................................................................. 28
Installing the front camera........................................................................................................................................ 29
Rear facing camera...........................................................................................................................................................30
Removing rear camera............................................................................................................................................... 30
Installing the rear camera.......................................................................................................................................... 30
Smart Card Cage................................................................................................................................................................31
Removing the smart card cage.................................................................................................................................31
Installing the smart card cage.................................................................................................................................. 32
Docking board.................................................................................................................................................................... 32
Removing the docking board.................................................................................................................................... 32
Installing the smart card cage.................................................................................................................................. 33
System Board..................................................................................................................................................................... 33
Removing system board.............................................................................................................................................33
Installing system board...............................................................................................................................................36
Coin cell battery.................................................................................................................................................................36
Removing the coin cell battery ............................................................................................................................... 36
Installing the coin cell battery...................................................................................................................................37
Antenna................................................................................................................................................................................37
Removing the antenna module................................................................................................................................. 37
Installing the antenna module...................................................................................................................................39
USH board...........................................................................................................................................................................39
Removing the USH board..........................................................................................................................................39
Installing the USH board............................................................................................................................................40
Chapter 3: Technology and components...................................................................................... 42
Power adapter....................................................................................................................................................................42
Processors.......................................................................................................................................................................... 42
Identifying processors in Windows 10.................................................................................................................... 42
Verifying processor usage in task manager.......................................................................................................... 43
Verifying processor usage in resource monitor....................................................................................................43
Chipset.................................................................................................................................................................................44
Identifying chipset in device manager on Windows 10.......................................................................................44
Memory features............................................................................................................................................................... 45
Verifying system memory in setup.......................................................................................................................... 45
Verifying system memory .........................................................................................................................................45
Testing memory using ePSA..................................................................................................................................... 45
Display options................................................................................................................................................................... 45
Identifying display adapter........................................................................................................................................ 45
Changing the screen resolution............................................................................................................................... 46
Camera features................................................................................................................................................................ 46
Identifying the camera in Device Manager on Windows 10...............................................................................46
Starting the camera.................................................................................................................................................... 46
Starting the camera application...............................................................................................................................46
Hard drive options............................................................................................................................................................. 47
Identifying the hard drive in the BIOS.................................................................................................................... 47
Dell Active Pen ..................................................................................................................................................................48
4Contents

Chapter 4: System setup............................................................................................................. 49
Accessing System Setup BIOS...................................................................................................................................... 49
Entering BIOS without keyboard...................................................................................................................................49
System setup options.......................................................................................................................................................49
General screen options.............................................................................................................................................. 50
System Configuration screen options.................................................................................................................... 50
Video screen options.................................................................................................................................................. 52
Security screen options............................................................................................................................................. 52
Secure Boot screen options......................................................................................................................................53
Intel software guard extensions screen options.................................................................................................. 53
Performance screen options.....................................................................................................................................54
Power management screen options....................................................................................................................... 54
POST Behavior screen options................................................................................................................................ 55
Virtualization support screen options.....................................................................................................................56
Wireless screen options............................................................................................................................................. 56
Maintenance screen options.....................................................................................................................................56
System logs screen options...................................................................................................................................... 57
Updating the BIOS ........................................................................................................................................................... 57
System and setup password...........................................................................................................................................57
Assigning a system password and setup password............................................................................................ 58
Deleting or changing an existing system and or setup password....................................................................58
Chapter 5: Troubleshooting.........................................................................................................59
Enhanced Pre-boot System Assessment - ePSA......................................................................................................59
Running the ePSA Diagnostic Utility ..................................................................................................................... 59
LCD Built-in Self Test - BIST ........................................................................................................................................ 59
Method 1 - Run the laptop LCD built-in self test - BIST .................................................................................. 60
Method 2 - Run the laptop LCD built-in self test - BIST ................................................................................. 60
Method 3 - Run the laptop LCD built-in self test - BIST ................................................................................. 60
Tablet LED........................................................................................................................................................................... 61
Real Time Clock reset....................................................................................................................................................... 61
Identifying the AC adapter shipped with your tablet................................................................................................62
Chapter 6: Contacting Dell.......................................................................................................... 63
Contents 5

System specifications
NOTE: Offerings may vary by region. The following specifications are only those required by law to ship with your
computer. For more information about the configuration of your computer, go to Help and Support in your Windows
operating system and select the option to view information about your computer.
Topics:
•Processor specifications
•System specifications
•Memory specifications
•Video specifications
•Audio specifications
•Port and connector specifications
•Communication specifications
•Camera specifications
•Display specifications
•AC adapter specifications
•Battery specifications
•Physical specifications
•Environmental specifications
Processor specifications
Feature Specification
Types ●7th generation Intel processors
System specifications
Feature Specification
Chipset Integrated in the processor
DRAM bus width 64-bit; 2 channels
Memory specifications
Feature Specification
Memory
connector
Onboard memory
Memory capacity 4 GB, 8 GB, and 16 GB (on board)
NOTE: The memory is dependent on the processor shipped with the system.
Memory type ●LPDDR3—2133 MHz
1
6 System specifications

Video specifications
Feature Specification
Type Integrated on system board
UMA controller Intel Integrated HD Graphics 620
External display
support
Optional Dell Adapter - USB Type-C to HDMI/VGA
NOTE: Supports VGA, DisplayPort, HDMI through the docking station (Dell Dock WD15).
Audio specifications
Feature Specification
Types High-definition audio
Controller Realtek ALC3253
Stereo
conversion
24-bit—analog-to-digital and digital-to-analog
Internal interface High-definition audio
External
interface
Microphone-in, stereo headphones, and speakers universal connector
Speakers Two
Internal speaker
amplifier
2 W (RMS) per channel
Volume controls Volume up and Volume down buttons
Port and connector specifications
Feature Specification
Audio ●Realtek ALC3253-CG Controller
●Microphone-in and stereo headphones/speakers universal connector
Video ●Two DisplayPorts over USB Type-C
Memory card
reader
●micro SD 4.0
●Optional smart card reader
Micro Subscriber
Identity Module
(uSIM) card
Optional
USB ports ●1 x USB 3.1 Gen1 (with PowerShare)
Micro SIM Optional micro-SIM card slot (under the kickstand)
Security Lock ●Noble Wedge Lock slot
Other ●Optional contacted smart card reader and touch finger print reader
●Windows Home Button
●Power Button
●I2C for the Dock Pin Keyboard connection
System specifications 7

Communication specifications
Features Specification
Wireless WiFi Display (Miracast)
Wireless LAN ●Qualcomm QCA61x4A 802.11ac Dual Band (2x2) Wireless Adapter+ Bluetooth 4.1
●Intel Dual-Band Wireless-AC 8265 Wi-Fi + BT 4.2 Wireless Card (2x2). Bluetooth Optional
Mobile
Broadband
(Optional)
●Dell Wireless Qualcomm Snapdragon X7 LTE-A
●Dell Wireless Qualcomm Snapdragon X7 LTE-A
●Dell Wireless Qualcomm Snapdragon X7 HSPA+
●Dell Wireless Telit Intel Ln-930 AP LTE CAT4
WiGig (Optional) Intel Tri-Band Wireless-AC 18265 WiGig + Wi-Fi + BT4.2 Wireless Card
Camera specifications
Feature Specification
Type ●Front Camera- 5MP fixed focus
●Rear Camera- 8MP auto focus
●IR Camera- VGA IR cameraOptional IR camera (Win Hello compliant)
Sensor type CMOS sensor technology (Front and Rear camera)
Imaging rate Up to 30 frames per second
Video Resolution ●Front Camera- 2592 x 1944 pixels
●Rear Camera- 3264 x 2448 pixels
Display specifications
Feature Specification
Type 12.3" 3:2 Touch with Corning Gorilla Glass 4, Anti-reflective, and Anti-smudge
Luminance 340 nits
Height 265.56 mm(10.55 inches)
Width 185.06 mm (7.28 inches)
Diagonal 312.42 mm (12.0 inches)
Maximum
resolution
1920x1280
Refresh rate 60 Hz
Maximum
viewing angles—
horizontal
+/-80°
Maximum
viewing angles—
vertical
+/-80°
Pixel pitch 0.135 mm
8 System specifications

AC adapter specifications
Feature Specification
Type 45 W USB Type-C, 46 W small form factor (SFF) USB Type C and 65 W USB Type-C
Input voltage 100 V AC–240 V AC
Input current—
maximum
1.3 A / 1.7 A
Input frequency 47 Hz to 63 Hz
Output current ●2.25 A, 3 A, and 3.25 A
Rated output
voltage
20 VDC/15 VDC/9 VDC/5 VDC
Weight ●0.385 lbs(45 W) and 0.476 lbs(65 W)
●175 g (45 W) and 216.2 g (65 W)
Dimensions ●0.191 x 0.121 x 0.048 inches (45 W) and 0.217 x 0.145 x 0.048 (65 W)
●87 x 55 x 22 mm (45 W) and 99 x 66 x 22 mm (65 W)
Temperature
range—
Operating
0°C to 40°C (32°F to 104°F)
Temperature
range—Non-
Operating
–40°C to 70°C (–40°F to 158°F)
Battery specifications
Feature Specification
Type ●31.5 Whr Polymer battery with ExpressCharge
●42 Whr Polymer battery with ExpressCharge
●42 WHr Polymer Long Life Cycle
31.5 Whr:
Length 177.6 mm (6.99 inches)
Width 82.6 mm (3.25 inches)
Height 5.5 mm (0.21 inch)
Weight 135.0 g (0.29 lb) (126 GB m2 SATA)
Voltage 11.4 VDC
42 WHr:
Length 177.6 mm (6.99 inches)
Width 82.6 mm (3.25 inches)
Height 5.5 mm (0.21 inch)
Weight 170 g (0.37 lb)
Voltage 7.6 VDC
Life span 300 discharge per charge cycles
Temperature
range
Operating ●Charge: 0°C to 50°C (32°F to 122°F)
●Discharge: 0°C to 70°C (32°F to 158°F)
System specifications 9

Feature Specification
Non-operating - 20°C to 85°C (- 4°F to 185°F)
Physical specifications
Feature Specification
Weight - Tablet
only(with 32 Whr
battery and 126
GB m2 SATA
base)
1.89 lbs (856 g)
Weight -
Tablet+Keyboard
2.64 lbs(1.196 kg)
Input current—
maximum
1.3 A / 1.7 A
Width 11.5 inches (292 mm)
Height (Tablet
only)
0.38 inch (9.76 mm)
Height(Tablet+K
eyboard only)
0.59 inch (14.9 mm)
Depth 8.22 inches(208.8 mm)
Environmental specifications
Temperature Specifications
Operating 0°C to 35°C (32°F to 95°F)
Storage –40°C to 65°C (–40°F to 149°F)
Relative
humidity—
maximum
Specifications
Operating 10% to 90% (non-condensing)
Storage 10% to 95% (non-condensing)
Altitude—
maximum
Specifications
Operating 0 m to 3048 m (0 to 10,000 ft)
Non-operating 0 m to 10,668 m (0 ft to 35,000 ft)
Airborne
contaminant level
G2 or lower as defined by ISA S71.04–1985
10 System specifications

Using your tablet
This section covers how to power on and turn off your tablet including how to install the micro SD and micro SIM cards.
Topics:
•Screw list
•Recommended tools
•Deploying the kickstand
•Before Working Inside Your Tablet
•After working inside your tablet
•micro SD - micro SIM card
•Display Panel and display cable
•PCIe Solid State Drive (SSD)
•WLAN card
•Speaker
•Battery
•System fan
•Heat sink
•Front facing camera
•Rear facing camera
•Smart Card Cage
•Docking board
•System Board
•Coin cell battery
•Antenna
•USH board
Screw list
Table 1. Latitude 5285 2-in-1 Screw size list
Component M2.0x 1.1+1.7 M2.0X4.
0
M1.6x3.
0M2.0X2.5 M1.6x3. 0M2.0X2.0 M2.0X3.5
Back cover 3
Battery 4
Heat sink 4
Hinges 4
Display panel 6
System fan 2
WWAN card 1
WLAN card 1
Smart card cage 3
SSD card 1
Docking bracket 2
Kickstand 4
2
Using your tablet 11

Table 1. Latitude 5285 2-in-1 Screw size list (continued)
Component M2.0x 1.1+1.7 M2.0X4.
0
M1.6x3.
0M2.0X2.5 M1.6x3. 0M2.0X2.0 M2.0X3.5
Camera module 2 (front)
1(rear)
Antenna module 1
System board 4
Recommended tools
The procedures in this document may require the following tools:
●Phillips screwdriver
○#0 Phillips head screwdriver
○#1 Phillips head screwdriver
●Plastic scribe
Deploying the kickstand
1. Hold the tablet vertically on a plane surface.
2. Press the tablet to allow the kickstand to open.
12 Using your tablet

NOTE: The pegs at the bottom of the tablet allow the kickstand to open.
Before Working Inside Your Tablet
Use the following safety guidelines to help protect your tablet from potential damage and to help to ensure your personal safety.
Unless otherwise noted, each procedure included in this document assumes that the following condition exists:
●You have read the safety information that shipped with your tablet.
NOTE: Before working inside your tablet, read the safety information that shipped with your tablet. 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 certified 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, such as a connector on the back of the tablet.
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.
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 tablet and certain components may appear differently than shown in this document.
To avoid damaging your tablet, perform the following steps before you begin working inside the tablet.
1. Ensure that your work surface is flat and clean to prevent the tablet cover from being scratched.
2. Turn off your tablet.
3. If the tablet is connected to a docking device (docked) such as the optional docking station or keyboard dock, un-dock it.
4. Disconnect the power adapter from the tablet.
5. Press and hold the power button for a few seconds to remove the flea power from the system board.
CAUTION: To guard against electrical shock, always unplug your tablet from the electrical outlet.
CAUTION: Before touching anything inside your tablet, ground yourself by touching an unpainted metal
surface, such as the metal at the back of the tablet. While you work, periodically touch an unpainted metal
surface to dissipate static electricity, which could harm internal components.
6. Remove the storage SD card from the tablet.
Turning off your tablet — Windows 10
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your
computer .
1. Click or tap .
2. Click or tap and then click or tap Shut down.
Using your tablet 13

NOTE: Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not
automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds
to turn them off.
After working inside your tablet
CAUTION: Leaving stray or loose screws inside your tablet may severely damage your tablet.
1. Replace all screws and ensure that no stray screws remain inside your tablet.
2. Connect any external devices, peripherals, and cables that you removed before working on your tablet.
3. Replace any media card, SIM card, and any other parts that you removed before working on your tablet.
4. Connect your tablet and all attached devices to their electrical outlets.
5. Turn on your tablet.
micro SD - micro SIM card
uSIM cards can be installed only on tablets shipped with WWAN module.
1. Follow the procedure in Before working inside your tablet.
NOTE: disconnect the power and drain flea power before preforming the steps
2. Lay the tablet on a plane and flat surface, with the kickstand facing upward.
NOTE: Pull the kickstand to open by 135° to access the micro SD and micro SIM card slot
CAUTION: Do not pull or slide more than 135° to avoid damage to the hinges.
3. Slide and lift the cover.
NOTE: Ensure to turn off or disconnect power, to drain flea power before installing the micro SD and/or micro-SIM.
14 Using your tablet

4. Slide the kickstand to an angle 135°, to microSD and micro-SIM cards slot.
5. Insert the SD card and/or micro-SIM cards into the slots indicated on the slots.
6. Align the cover with the groove on the tablet and slide it inside to secure the microSD and the micro-SIM cards.
7. Perform the same steps to remove the microSD / micro-SIM cards
Using your tablet 15

Display Panel and display cable
Removing the display panel and display cable
1. Follow the procedure in Before working inside your tablet.
2. Remove the:
a. uSIM/microSD card
NOTE: uSIM card slot is available only on tablets shipping with WWAN module.
3. Open the kickstand by holding the tablet vertically and pressing it down. Place the tablet with the display facing down.
NOTE: You can also open the kickstand from the speaker recess area.
4. Place the tablet on a flat surface and lift the stand to reveal the base of the tablet.
5. To release the display panel:
a. Remove the M1.6 x 3.0 screws that secure the base cover to the tablet [1].
b. Close the kickstand [2] .
16 Using your tablet

6. Use a plastic scribe [1] to pry the edges [2] of the display panel starting from the bottom side first (near the docking port).
NOTE: Flip the tablet so the LCD is upward.
Using your tablet 17

7. Flip the display panel on a plane surface .
8. To disconnect the cables:
a. Disconnect the battery cable on the system board [1].
b. Disconnect the display cable on the system board [2].
9. Lift the display panel from the tablet.
18 Using your tablet

Installing the display panel
1. Place the display panel on a plane surface.
2. Connect the display cable to the connector on the system board
3. Connect the battery cable to the connector on the system board.
4. Install the display panel on the tablet and press the edges until they snap in.
5. Flip the tablet and open the kickstand.
6. Replace the M1.6 x 3.0 screws to secure the tablet to the display panel.
7. Install the:
a. uSIM/micro SD card
8. Follow the procedure in After working inside your tablet.
Removing the display cable
1. Follow the procedure in Before working inside your tablet.
2. Remove the:
a. uSIM and/or microSD card
b. display panel
3. Removing the display cable:
a. Peel the tape that secures the touch module cable [1].
b. Disconnect the touch module cable from the connector on the display panel [2].
c. Do-not peel the tape that secures the display cable [3].
d. Disconnect the display cable from the connector on the display panel [4].
Using your tablet 19

Installing the display cable
1. Connect the display cable to connector on the display panel.
2. Affix the tape to secure the display cable to the display panel.
3. Connect the touch module cable to connector on the display panel.
4. Affix the tape to secure the touch module cable to the display panel.
5. Install the:
a. display panel
b. uSIM/microSD card
NOTE: uSIM card is installed only on tablets shipping with WWAN module.
6. Follow the procedure in After working inside your tablet.
PCIe Solid State Drive (SSD)
Removing the SSD module
1. Follow the procedure in Before working inside your tablet.
2. Remove the:
a. uSIM/microSD card
NOTE: uSIM card slot is available only on tablets shipping with WWAN module.
b. display panel
3. To remove the SSD module:
a. Remove the M2.0 x 2.5 screw securing the SSD shield [1].
b. Lift the SSD shield away from the tablet [2].
c. Slide and lift the SSD module from the slot on the tablet [3].
20 Using your tablet