Dell C7520QT User manual

Model: C7520QT
Regulatory model: C7520QTt
Dell C7520QT
User’s Guide

NOTE: A NOTE indicates important information that helps you make better use of your
display.
CAUTION: A CAUTION indicates potential damage to hardware or loss of data if
instructions are not followed.
WARNING: A WARNING indicates a potential for property damage, personal injury,
or death.
Copyright © 2018-2020 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.
2020 – 11
Rev. A02

Contents
About Your Display ..................................5
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Identifying Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Display Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Plug-and-Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
LCD Display Quality and Pixel Policy. . . . . . . . . . . . . . . . . . . . . . .24
Setting Up the Display ..............................25
Connecting Your Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Remote Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Operating the Display...............................34
Turning on the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Touch OSD Launcher. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Using the Touch Control Launcher. . . . . . . . . . . . . . . . . . . . . . . .35
Using the OSD lock function. . . . . . . . . . . . . . . . . . . . . . . . . . .36
Using the On-Screen Display (OSD) Menu . . . . . . . . . . . . . . . . . . . 37
Dell Web Management for Displays . . . . . . . . . . . . . . . . . . . . . . . 52
Troubleshooting ...................................57
Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Contents | 3

4| Contents
Built-in Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Product Specific Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Touchscreen Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Universal Serial Bus (USB) Specific Problems . . . . . . . . . . . . . . . . . 63
Ethernet Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Appendix.........................................65
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
FCC Notices (U.S. only) and Other Regulatory Information . . . . . . . . . . 65
Contacting Dell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
EU product database for energy label and product information sheet . . . . . 65
Setting Up Your Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Maintenance Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

About Your Display | 5
About Your Display
Package Contents
Your display ships with the components shown below. Make sure that you have received all the
components and contact Dell if something is missing.
NOTE: Some items may be optional and may not ship with your display. Somefeatures
may not be available in certain countries.
Display
Remote Control & Batteries
(AAA x 2)
Stylus x 2

6 | About Your Display
(Remote control & Stylus holder)
x 3
Wire Saddle x 3
Power cable (varies by country)
Power cable for connecting
Optiplex system to display
(see Optiplex (Optional))
USB 3.0 upstream cable (enables
the USB ports on the display)
DP cable (DP to DP)
VGA cable
HDMI cable
• Flatfrog Whiteboard
Software download
instruction
• Safety, Environmental and
Regulatory Information
• Quick Setup Guide

About Your Display | 7
Product Features
The Dell C7520QT display has an active matrix, thin film transistor (TFT), liquid crystal display
(LCD), and LED backlight. The display features include:
• 189.273 cm (74.52-inch) active area display (Measured diagonally) 3840 x 2160 (16:9
aspect ratio) resolution, plus full-screen support for lower resolutions.
• Video Electronics Standards Association (VESA™) 400 x 400 mm mounting holes.
• Plug and play capability if supported by your system.
• On-Screen Display (OSD) adjustments for ease of set-up and screen optimization.
• Security lock slot.
• Supports Asset Management Capability.
• Arsenic-Free glass and Mercury-Free for Panel only.
• ≤ 0.3 W in Standby Mode.
• Easily setup with Dell Optiplex Mirco PC (Mirco Form Factor).
• Up to 20 points and 4 pens InGlassTM Touch technology.
• Optimize eye comfort with a flicker-free screen.
• The possible long-term effects of blue light emission from the display may cause damage
to the eyes, including eye fatigue or digital eye strain. ComfortView feature is designed to
reduce the amount of blue light emitted from the display to optimize eye comfort.

8 | About Your Display
Identifying Parts and Controls
Front view
25 3
11
4
Label Description
1Screen drop down touch key
2IR Lens
3Power on/off button
4Power LED indicator
Solid white light indicates the monitor is turned on and functioning normally. Blinking
white light indicates the monitor is in Standby Mode.
5OSD Launcher touch key (For more information, see Operating the Display)

About Your Display | 9
Back View
1
2
3
8 9765
4
11
1
DELL C7520QT
Flat Panel Monitor / 液晶显示器
型号: C7520QT
Input Rating / 输入电源:100-240V ~ 50/60Hz 5.5A
Output Rating / 输出电源:100-240V ~ 50/60Hz 2A
Made in China / 制造地:中国
Manufactured date / 制造日期:
E
t
DELL C7520QT
Flat Panel Monitor / Monitor Plano Panel / Moniteur à écran plat / 液晶顯示器
Model No. /
N° de Modelo
/ Numéro de modèle /型號:
C7520QTt
Input Rating / Entrada / Daya Tegangan / Tension d’entrée: 100-240V ~ 50/60Hz 5.5A
輸入電源:交流電壓100-240伏特,5.5 安培,50/60赫茲
Output Rating / Valores nominales de salida / Nilai Arus Outpu / Puissance de sortie: 100-240V ~ 50/60Hz 2A
輸出電源:交流電壓100-240伏特,2安培,50/60赫茲
Удельная мощность рабочего режима - 0,00X Вт/см2
Потребляемая мощность изделием в режиме ожидания -0,XX Вт
Потребляемая мощность изделием в выключенном режиме - 0,XX Вт
Consumo de energía en operación: XX.XX Wh
Made in China / Fabricado en China / Fabriqué en Chine / Сделано в Китае / 製造地:中國
警語:使用過度恐傷害視力
신청인：Wistron Corporation (For Korea)
Wistron InfoComm (Zhongshan) Corporation Linhai Branch
제조자: Wistron InfoComm (Zhongshan) Corporation Linhai Branch
A/S연락처:080-854-0066
제조국:중국
CAN ICES-3 (B)/NMB-3(B)
R43004
RoHS
И005-19
デル株式会社
IDXXXXXXXXXX
Apparatet må tilkoples jordet stikkontakt.
Apparaten skall anslutas till jordat uttag.
Apparatets stikprop skal tilsluttes en stikkontakt med jord,
som giver forbindelse til stikproppens jord.
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan.
AddressforEUOnly:
RaheenBusinessPark
LimerickIreland
www.dell.com
XXXXXXXX-XXXXX
X-REM-WT1-C7520QTt
IDXXXXXXXXXX
XXXXXX-XX
IS13252(Part1)/
IEC60950-1
R-41071650
www.bis.gov.in
Label Description Use
1Handle x 4 Use to move the display.
2VESA mounting holes (400 x 400 mm) To mount the display.
3Security lock slot Secures Optiplex with security cable lock
(sold separately).
4Optiplex holder Use to hold a Micro Form Factor Optiplex
PC.
5Serial number, Service Tag label, and
Website Refer to this label if you need to contact
Dell for technical support.
6Barcode, serial number, and Service Tag
label
7Regulatory label List of approved regulatory labels.
8AC to optiplex (optional) AC power to optiplex power adapter.
9AC power connector To connect the display power cable.

10 | About Your Display
Side View
1b
1c
2
3
5
4
9
10
8
6
7
1a
Label Description Use
1a HDMI 1 connector
Connect your computer with HDMI cable.1b HDMI 2 connector
1c HDMI 3 connector
2DP connector Connect your computer with DP cable.
3VGA connector Connect your computer with VGA cable.
4Audio line-in port Analog audio (two channel) input.
5Audio line-out port Connect to external audio peripherals.
Only supports 2-channel audio.
NOTE: The audio line-out port does not support
headphones.
6USB 3.0 upstream ports
(3)
Connect the USB cable that comes with your display to the
computer. Once this cable is connected, you can use the
USB downstream connectors on the display and the touch
screen function on the display.

About Your Display | 11
7USB 3.0 downstream
ports (3)
Connect your USB device.
You can only use this connector after you have connected
the USB cable to the computer and USB upstream
connector on the display.
8USB charging port USB 3.0 with 10 W with BC1.2 charging capability at 2A
(max).
9RS232 connector Remote management and control of display via RS232.
10 RJ-45 connector Remote Network Management and control of display via
RJ-45.
Input sources and USB pairing
CEC
Input sources USB upstream
HDMI 1 CEC USB 1
HDMI 2 USB 2
HDMI 3
USB 3DP
VGA
Bottom View
2 31
Label Description
1, 2 Speakers
3Power on/off button

12 | About Your Display
Display Specifications
Screen type Active matrix - TFT LCD
Panel Type In-plane switching Technology
Aspect ratio 16:9
Viewable image dimensions
Diagonal 189.273 cm (74.52 inches)
Active Area
Horizontal 1649.664 mm (64.95 inches)
Vertical 927.936 mm (36.53 inches)
Area 1530323.4 mm2(2372 inches2)
Pixel pitch 0.429 mm x 0.429 mm
Pixel per inch (PPI) 59
Viewing angle
Horizontal 178° (typical)
Vertical 178° (typical)
Panel brightness 350 cd/m² (typical)
Contrast ratio 1200 to 1 (typical)
Display screen coating 9H, Anti-Smudge, Anti-Glare
Response Time 8 ms typical (G to G), 12 ms max. (G to G )
Color depth 1.07 Billon colors
Color gamut NTSC ( 72%)
Connectivity •1 x DP 1.2
•1 x VGA
•3 x HDMI 2.0
•4 x USB 3.0 downstream port
(1 x USB BC1.2 charging capability at 2A (max))
•3 x USB 3.0 upstream port
•1 x Analog 2.0 audio line out (3.5 mm jack)
•1 x Analog 2.0 audio line in (3.5 mm jack)
•1 x RJ-45
•1 x RS232
Border width (edge of display to
active area)
42.75 mm (Top)
42.69 mm (Left/Right)
46.75 mm (Bottom)

About Your Display | 13
Touch
Type InGlass Touch TechnologyTM
Input Method Bare finger and stylus
Interface USB HID Compliant
Touch point Up to 20 points touch
Up to 4 pens
NOTE: Touch Pen and Eraser differentiation ready (functionality subject to application).
Support OS
OS Version Touch Pen Eraser
Windows 7 Pro and Ultimate 20 4 1
8, 8.1 20 4 1
10 20 4 1
Chorme OS Linux kernel version 3.15 (3.10) or later120 4 (0) 1 (0)
Android 4.4 (KitKat) with Linux kernel 3.15 (3.10) or later120 4 (0) 1 (0)
Other Linux
based OS
Linux kernel 3.15 or later 20 4 1
macOS 10.10, 10.11 1 (mouse2) No
1 Functionality of Linux kernel has been verified on Ubuntu 14.04 and Debian 8. Functionality of
Chrome OS and Android with Linux kernel 3.15 needs comfirmation.
2Mouse emulation in landscape mode. Full multi-touch requires additional drivers on the host
system.
Touch sensor input accuracy
Ty p 1 Max2Unit
Touch sensor input accuracy
Center area31.0 1.5 mm
Edge area41.2 2.0 mm
1Average accuracy at the specified input area.
295-percentile accuracy of specified input area.
3>20 mm from active touch area edge
4>20 mm from active touch area edge
Note that touch sensor input accuracy is defined relative to the active touch area as defined in
the reference drawing (listed in 8.1). The overall system accuracy, of touch co-ordinates relative
to display co-ordinates, is directly affected by integration assembly tolerances.

14 | About Your Display
Resolution Specifications
Horizontal scan range 30 kHz to 140 kHz (DP/HDMI)
Vertical scan range 24 Hz to 75 Hz (DP/HDMI)
Maximum preset resolution 3840 x 2160 at 60 Hz
Video display capabilities
(DP & HDMI playback)
480p, 576p, 720p, 1080i, 1080p, 2160p
NOTE:VGA input resolution supported is 1920 x 1080 only.
Preset Display Modes
Display Mode Horizontal
Frequency
(kHz)
Vertical
Frequency
(Hz)
Pixel Clock
(MHz)
Sync Polarity
(Horizontal/
Vertical)
720 x 400 31.5 70.0 28.3 -/+
640 x 480 31.5 60.0 25.2 -/-
640 x 480 37.5 75.0 31.5 -/-
800 x 600 37.9 60.0 40.0 +/+
800 x 600 46.9 75.0 49.5 +/+
1024 x 768 48.4 60.0 65.0 -/-
1024 x 768 60.0 75.0 78.8 +/+
1152 x 864 67.5 75.0 108.0 +/+
1280 x 800 49.3 60.0 71.0 +/+
1280 x 1024 64.0 60.0 108.0 +/+
1280 x 1024 80.0 75.0 135.0 +/+
1600 x 1200 75.0 60.0 162.0 -/+
1920 x 1080 67.5 60.0 193.5 +/+
2048 x 1152 71.6 60.0 197.0 +/-
2560 x 1440 88.8 60.0 241.5 +/-
3840 x 2160 65.68 30.0 262.75 +/+
3840 x 2160 133.313 60.0 533.25 +/+

About Your Display | 15
Electrical Specifications
Video input signals •Digital video signal for each dierential line
Per dierential line at 100 ohm impedance
•DP/HDMI/VGA signal input support
Input voltage/ frequency/current 100-240 VAC / 50 or 60 Hz ± 3 Hz / 5.5 A (maximum)
Output voltage/ frequency/current 100-240 VAC / 50 or 60 Hz ± 3 Hz / 2 A (maximum)
Inrush current 120 V: 42 A (Max.) at 0 °C (cold start)
240 V: 80 A (Max.) at 0 °C (cold start)
Power Consumption 0.3 W (Off Mode)1
0.3 W (Standby Mode)1
140 W (On Mode)1
270 W (Max)2
114.4 W (Pon)3
Not Applicable (TEC)3
1As defined in EU 2019/2021 and EU 2019/2013.
2Max brightness and contrast setting with maximum power loading on all USB ports.
3Pon: Power consumption of On Mode as defined in Energy Star 8.0 version.
TEC: Total energy consumption in kWh as defined in Energy Star 8.0 version.
This document is informational only and reflects laboratory performance. Your product may
perform differently, depending on the software, components and peripherals you ordered and
shall have no obligation to update such information. Accordingly, the customer should not
rely upon this information in making decisions about electrical tolerances or otherwise. No
warranty as to accuracy or completeness is expressed or implied.
NOTE: This monitor is ENERGY STAR certified.
This product qualifies for ENERGY STAR in the factory default settings which can be restored
by “Factory Reset” function in the OSD menu. Changing the factory default settings or
enabling other features may increase power consumption that could exceed the ENERGY
STAR specified limit.

16 | About Your Display
Physical Characteristics
Connector type •DP connector
•VGA connector
•HDMI connector
•Audio line-out
•Audio line-in
•USB 3.0 connector
•USB charging port- supplying power of up to 5 V (max
2A) for connected devices
•RJ-45 connector
•RS232 connector
Signal cable type (in-box) DP, 3 m cable
HDMI, 3 m cable
VGA, 3 m cable
USB 3.0, 3 m cable
Optiplex power cable, 1 m
Dimensions
Height 1017.44 mm (40.06 inches)
Width 1735.02 mm (68.31 inches)
Depth 79.1 mm (3.11 inches)
Weight
Weight with packaging 76 kg (167.55 lb)
Weight without packaging 64 kg (141.10 lb)

About Your Display | 17
Environmental Characteristics
Compliant Standards
ENERGY STAR certified Monitor yes
EPEAT EPEAT registered where applicable. EPEAT registration
varies by country. See www.epeat.net for registration
status by country.
RoHS Compliant yes
Temperature
Operating 0 °C to 40 °C (32 °F to 104 °F)
Non-operating –20 °C to 60 °C (–4 °F to 140 °F)
Humidity
Operating 10% to 80% (non-condensing)
Non-operating 5% to 90% (non-condensing)
Altitude
Operating 5,000 m (16,404 ft) (maximum)
Non-operating 12,192 m (40,000 ft) (maximum)
Thermal dissipation 921.89 BTU/hour (maximum)
477.70 BTU/hour (On Mode)

18 | About Your Display
Pin Assignments
DP connector
Pin number 20-pin side of theconnected signal cable
1ML3(n)
2GND
3ML3(p)
4ML2(n)
5GND
6ML2(p)
7ML1(u)
8GND
9ML1(p)
10 ML0(n)
11 GND
12 ML0(p)
13 CONFIG1/(GND)
14 CONFIG2/(GND)
15 AUX CH (p)
16 DP_Cable Detect
17 AUX CH (n)
18 Hot Plug Detect
19 GND
20 +3.3V DP_PWR

About Your Display | 19
VGA connector
Pin number 15-pin side of theconnected signal cable
1Video-Red
2Video-Green
3Video-Blue
4NC
5Self-test
6GND-R
7GND-G
8GND-B
9Computer 5 V / 3.3 V
10 GND-sync
11 GND
12 DDC data
13 H-sync
14 V-sync
15 DDC clock

20 | About Your Display
HDMI connector
Pin number 19-pin side of theconnected signal cable
1TMDS DATA 2+
2TMDS DATA 2 SHIELD
3TMDS DATA 2-
4TMDS DATA 1+
5TMDS DATA 1 SHIELD
6TMDS DATA 1-
7TMDS DATA 0+
8TMDS DATA 0 SHIELD
9TMDS DATA 0-
10 TMDS CLOCK+
11 TMDS CLOCK SHIELD
12 TMDS CLOCK-
13 CEC
14 Reserved (N.C. on device)
15 DDC CLOCK (SCL)
16 DDC DATA (SDA)
17 DDC/CEC Ground
18 +5 V POWER
19 HOT PLUG DETECT