Dell C7520QT User Manual

Troubleshooting | 63
Touchscreen Problems
Specific
Symptoms
What You
Experience
Possible Solutions
Touch report
error
Touch function
miss alignment or
no touch function
•Use the Dell provided USB cable to connect your
computer.
•Make sure the power cable has a ground pin.
•Unplug and replug the power cable to allow
initialization of the touch module.
•Make sure computer supports USB 2.0 or later.
•If the display cannot be detected by the computer,
power o/on the monitor or unplug and replug the
USB cable.
Touchscreen
non-responsive in
standby mode
Cannot wake
up display and
computer by
using touch in
standby mode
•Access Device Manager, expand HID Interface Device
under Human Device.
•Right click HID- compliant device, click Properties and
select the check-box to allow the device to wake the
computer.
•Check Display OSD ‘Wake on touch’ setting is enabled.
Universal Serial Bus (USB) Specific Problems
Specific
Symptoms
What You
Experience
Possible Solutions
USB interface is
not working
USB peripherals
are not working
•Check that your display is turned ON.
•Reconnect the upstream cable to your computer.
•Reconnect the USB peripherals (downstream
connector).
•Switch o and then turn on the display again.
•Reboot the computer.
•Some USB devices like external portable HDD require
higher electric current; connect the device directly to
the computer system.
SuperSpeed USB
3.0 interface is
slow.
SuperSpeed USB
3.0 peripherals
working slowly or
not working at all
•Check that your computer is USB 3.0-capable.
•Some computers have USB 3.0, USB 2.0, and USB 1.1
ports. Ensure that the correct USB port is used.
•Reconnect the upstream cable to your computer.
•Reconnect the USB peripherals (downstream
connector).
•Reboot the computer.

Dell C7520QT Specifications

General

Color gamut	72 %
Pixel pitch	0.429 x 0.429 mm
Aspect ratio	16:9
Screen shape	Flat
Response time	8 ms
Backlight type	LED
Display diagonal	74.5 \
Surface hardness	9H
Touch technology	Multi-touch
Touchscreen type	Multi-user
Anti-glare surface	Yes
Display brightness	350 cd/m²
Display technology	LCD
Native refresh rate	60 Hz
Supported video modes	2160p
Viewable size diagonal	1892.7 mm
Contrast ratio (typical)	1200:1
Display number of colors	1.073 billion colors
Number of simultaneous touchpoints	20
Certification	UL
Product color	Black
Panel mounting interface	400 x 400 mm
Placement supported	Horizontal
Ethernet LAN (RJ-45) ports	1
Display viewable area (HxV)	1649.7 x 927.9 mm
Cables included	DisplayPort, HDMI, USB, VGA
DVI port	-
USB version	2.0/3.2 Gen 1 (3.1 Gen 1)
USB hub version	3.2 Gen 1 (3.1 Gen 1)
USB connector type	USB Type-A, USB Type-B
USB ports quantity	7
HDMI ports quantity	3
USB upstream port type	USB Type-B
Height adjustment	No
AC input voltage	100 - 240 V
Power supply type	AC
AC input frequency	50 - 60 Hz
Energy efficiency scale	A to G
Power consumption (max)	270 W
Power consumption (standby)	0.3 W
Power consumption (typical)	140 W
Operating altitude	0 - 5000 m
Non-operating altitude	0 - 12191 m
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 90 %
Operating relative humidity (H-H)	20 - 80 %
RMS rated power	40 W
Number of speakers	2
Sustainability certificates	RoHS, ENERGY STAR
Harmonized System (HS) code	85285210
Package weight	Weight of the packaged product in gram.

Weight and Dimensions

Depth	78.74 mm
Width	1734.82 mm
Height	1018.54 mm
Weight	64000 g
Display width	1735.02 mm
Display height	1017.44 mm
Depth (without stand)	79.1 mm
Width (without stand)	1735 mm
Height (without stand)	1017.4 mm
Weight (without stand)	76000 g