Dell C7520QT User’s Guide Model: C7520QT Regulatory model: C7520QTt
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 © 2018-2019 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.
Contents About Your Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Identifying Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Display Specifications . . . . . . . . . . . . . . .
Built-in Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Product Specific Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Touchscreen Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Universal Serial Bus (USB) Specific Problems . .
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.
(Remote control & Stylus holder) x3 Wire Saddle x 3 Power cable (varies by country) Power cable for connecting Optiplex system to display (see Optiplex (Optional)) USB 3.
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.
Identifying Parts and Controls Front view 1 1 5 Label 1 2 3 4 5 8 | 2 Description Screen drop down touch key IR Lens Power on/off button Power LED indicator OSD Launcher touch key (For more information, see Operating the Display) About Your Display 34
Back View 1 1 2 3 4 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: DELL 1 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.
Side View 1a 1b 6 1c 2 7 3 8 9 4 5 10 Label Description 1a HDMI 1 connector 1b HDMI 2 connector 1c HDMI 3 connector 2 DP connector Connect your computer with DP cable. 3 VGA connector Connect your computer with VGA cable. 4 Audio line-in port Analog audio (two channel) input. 5 Audio line-out port Connect to external audio peripherals. Only supports 2-channel audio. NOTE: The audio line-out port does not support headphones. 6 USB 3.
7 USB 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. 8 USB charging port USB 3.0 with 10 W with BC1.2 charging capability at 2A (max). 9 RS232 connector Remote management and control of display via RS232. 10 RJ-45 connector Remote Network Management and control of display via RJ-45.
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) 1530323.4 mm2 (2372 inches2) Area Pixel pitch 0.429 mm x 0.
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 Chorme OS 10 Linux kernel version 3.15 (3.10) or later1 20 20 4 4 (0) 1 1 (0) Android 4.4 (KitKat) with Linux kernel 3.15 (3.
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.
Electrical Specifications Video input signals • Digital video signal for each differential line Per differential line at 100 ohm impedance • DP/HDMI/VGA signal input support Input voltage/ frequency/current Output voltage/ frequency/current Inrush current 100-240 VAC / 50 or 60 Hz ± 3 Hz / 5.5 A (maximum) 100-240 VAC / 50 or 60 Hz ± 3 Hz / 2 A (maximum) 120 V: 42 A (Max.) at 0 °C (cold start) 240 V: 80 A (Max.
Environmental Characteristics Compliant Standards ENERGY STAR certified Monitor EPEAT RoHS Compliant Temperature Operating Non-operating Humidity Operating Non-operating Altitude Operating Non-operating Thermal dissipation yes EPEAT registered where applicable. EPEAT registration varies by country. See www.epeat.net for registration status by country.
The OSD operates only in the normal operation mode. If you press any button in the active-off mode, the following message is displayed: Dell 75 Monitor No HDMI 1 signal from your device. Press any key on the keyboard or move the mouse or wake it up. If there is no display, press the monitor button again to select the correct input source. C7520QT *Zero power consumption in OFF mode can only be achieved by disconnecting the AC main cable from the display.
Pin Assignments DP connector Pin number 20-pin side of the connected signal cable 1 ML3(n) 2 GND 3 ML3(p) 4 ML2(n) 5 GND 6 ML2(p) 7 ML1(u) 8 GND 9 ML1(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.
VGA connector Pin number 15-pin side of the connected signal cable 1 Video-Red 2 Video-Green 3 Video-Blue 4 NC 5 Self-test 6 GND-R 7 GND-G 8 GND-B 9 Computer 5 V / 3.
HDMI connector Pin number 19-pin side of the connected signal cable 1 TMDS DATA 2+ 2 TMDS DATA 2 SHIELD 3 TMDS DATA 2- 4 TMDS DATA 1+ 5 TMDS DATA 1 SHIELD 6 TMDS DATA 1- 7 TMDS DATA 0+ 8 TMDS DATA 0 SHIELD 9 TMDS DATA 0- 10 TMDS CLOCK+ 11 TMDS CLOCK SHIELD 12 TMDS CLOCK- 13 CEC 14 Reserved (N.C.
RS232 connector Pin number 9-pin side of the connected signal cable 1 - 2 RX 3 TX 4 - 5 GND 6 - 7 Not Used 8 Not Used 9 - About Your Display | 21
RJ-45 connector Pin number 12-pin side of the connected signal cable 1 D+ 2 RCT 3 D- 4 D+ 5 RCT 6 D- 7 GND 8 GND 9 LED2_Y+ 10 LED2_Y- 11 LED2_G+ 12 LED2_G- 22 | About Your Display
Universal Serial Bus (USB) This section gives you information about the USB ports available on your display. Your computer has the following USB ports: • 3 USB 3.0 upstream • 4 USB 3.0 downstream (1 USB charging port) NOTE: The display’s USB ports work only when the display is on or in the power save mode. If you turn off the display and then turn it on, the attached peripherals may take a few seconds to resume normal functionality. Transfer speed Data rate Power consumption SuperSpeed 5 Gbps 4.
Plug-and-Play You can install the display in any Plug-and-Play-compatible system. The display automatically provides the computer system with its extended display identification data (EDID) using display data channel (DDC) protocols so the computer can configure itself and optimize the display settings. Most display installations are automatic; you can select different settings if desired. For more information about changing the display settings, see Operating the Display.
Setting Up the Display Connecting Your Display WARNING: Before you begin any of the procedures in this section, follow the Safety Instructions. To connect your display to the computer: 1. Turn off your computer. 2. Connect the HDMI/DP/VGA/USB cable from your display to the computer. 3. Switch on your display. 4. Select the correct input source at Display OSD Menu and turn on your computer. Optiplex (Optional) Attaching the Optiplex • Open the carton, take out the Optiplex holder. 1. 2.
• Slide Optiplex holder back into display. External PC connection Connecting the USB cable USB USB NOTE: Refer to section on input source and USB pairing.
Connecting the HDMI cable HDMI HDMI Connecting the DP cable DP DP Connecting the VGA cable VGA VGA Setting Up the Display | 27
Connecting the Optiplex Connecting the HDMI cable HDMI1 USB 1 Connecting the DP cable USB 3 DP 28 | Setting Up the Display
Connecting the VGA cable USB 3 VGA Setting Up the Display | 29
Wall Mounting 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: DELL C7520QT E 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.
Remote Control 4. Left Press to move the selection left in OSD menu. 5. Down Press to move the selection down in OSD menu. 6. Menu Press to turn on the OSD menu. 7. Brightness Press to decrease the Brightness. 8. Volume Press to decrease the Volume. 9. MUTE Press to turn the mute function on/off. 10.Preset Modes Display information about Preset Modes. 11. Right Press to move the selection right in OSD menu. 12. OK Confirm an entry or selection. 1. Power On/Off Switch this display on or off. 13.
Inserting the batteries in the remote control The remote control is powered by two 1.5V AAA batteries. To install or replace batteries: 1. Press and then slide the cover to open it. 2. Align the batteries according to the (+) and (–) indications inside the battery compartment. 3. Replace the cover. CAUTION: The incorrect use of batteries can result in leaks or bursting.
Operating range of the remote control Point the top of the remote control toward the LCD display’s remote sensor during button operation. Use the remote control within a distance of about 7 m from remote control sensor or at a horizontal and vertical angle of within 22.5° within a distance of about 7 m.
Operating the Display Turning on the Display Press the Power button to turn the display On and Off. The white LED indicates the display is On and fully functional. A glowing white LED indicates DPMS Power Save Mode. Touch OSD Launcher This display comes with a touch OSD functionalities. Press the OSD launcher touch key to access the functionalities.
Using the Touch Control Launcher Use the touch control icons on the front of the display to adjust the characteristics of the image being displayed. As you use these icons to adjust the controls, an OSD shows the numeric values of the characteristics as they change. 1 2 3 4 5 6 7 The following table describes the touch control icons: Touch Control icons Description 1 Use this icon to switch screen to black or white. Go to Menu to select screen off color.
Using the OSD lock function 1. Press the OSD launcher touch key. 1 2. Touch and hold 2 3 4 5 6 7 for 5 seconds. you can see following select option: Dell 75 Monitor Select Option: C7520QT The following table describes the touch control icons: Options Description 1 Use this icon to lock OSD menu function. OSD menu lock 2 Use this icon to lock power button from powering off. Power-off button lock 3 Use this icon to lock OSD menu and power button from powering off.
3. Touch and hold for 5 seconds, touch to unlock. Dell 75 Monitor Select Option: C7520QT Using the On-Screen Display (OSD) Menu Accessing the Menu System NOTE: Any changes you make using the OSD menu are automatically saved if you move to another OSD menu, exit the OSD menu, or wait for the OSD menu to disappear. 1 Press the menu.
3 Use the OK icon to confirm your selection. OK 4 Use the Back icon to go back to the previous menu. Back Touch OSD Control Icon Menu and Submenus Description Brightness/ Contrast Use this menu to activate Brightness/Contrast adjustment. Dell 75 Monitor Brightness/Contrast Auto Adjust Input Source Color 75% Display Audio 75% Menu Personalize Others 38 | Brightness Brightness adjusts the luminance of the backlight (minimum 0; maximum 100). Touch the icon to increase brightness.
Icon Menu and Submenus Description Auto Adjust Even though your computer recognizes your display on startup, the Auto Adjustment function optimizes the display settings for use with your particular setup. Auto Adjustment allows the display to self-adjust to the incoming video signal. After using Auto Adjustment, you can further tune your display by using the Pixel Clock (Coarse) and Phase (Fine) controls under Display menu.
Icon Menu and Submenus Description Input Source Use the Input Source menu to select between different video inputs that are be connected to your display. Dell 75 Monitor Brightness/Contrast VGA Auto Adjust DP Input Source HDMI 1 Color HDMI 2 Display HDMI 3 Audio Auto Select Menu Reset Input Source On Personalize Others VGA Select VGA input when you are using the VGA connector. DP Select DP input when you are using the DP (DisplayPort) connector.
Icon Menu and Submenus Description Preset Modes When you select Preset Modes, you can choose Standard, ComfortView, Color Temp. or Custom Color from the list. Dell 75 Monitor Brightness/Contrast Preset Modes Standard Auto Adjust Input Color Format ComfortView Input Source Reset Color Color Temp. Color Custom Color Display Audio Menu Personalize Others • Standard: Default color settings. This is the default preset mode.
Icon Menu and Submenus Description Input Color Format Allows you to set the video input mode to: • RGB: Select this option if your display is connected to a computer (or DVD player) using the HDMI, DP or VGA cable. • YPbPr: Select this option if your DVD player supports only YPbPr output.
Icon Menu and Submenus Description Display Use the Display menu to adjust image. Dell 75 Monitor Wide 16:9 Brightness/Contrast Aspect Ratio Auto Adjust Horizontal Position Input Source Vertical Position Color Sharpness Display Pixel Clock Audio Phase Menu Reset Display 50 Personalize Others Aspect Ratio Horizontal Position Adjust the image ratio to Wide 16:9, 4:3 or 5:4. Vertical Position Use or to adjust the image up or down. Minimum is ‘0’ (-). Maximum is ‘100’ (+).
Icon Menu and Submenus Description Reset Display Restores the display settings to factory defaults. Audio Dell 75 Monitor Brightness/Contrast Volume 50 Auto Adjust Audio Source HDMI 1 Input Source Speaker On Color Reset Audio Display Audio Menu Personalize Others Volume Allows you to set the volume level of audio source. Use or to adjust the volume level from ‘0’ to ‘100’. Audio Source Allows you to set the audio source to PC Audio or HDMI/DP.
Icon Menu and Submenus Language Description Set the OSD display to one of eight languages. (English, Spanish, French, German, Brazilian Portuguese, Russian, Simplified Chinese, or Japanese). Transparency Select this option to change the menu transparency by using and icons (min. 0 / max. 100). Timer OSD Hold Time: Sets the time the OSD remains active after you press a button. Use the and icons to adjust the slider in 1-second increments, from 5 to 60 seconds.
Icon Menu and Submenus Description Screen Off Color Wake On Touch Reset Personalization Other Allows you to set the Screen Off Color to White or black. Select On to turn on this feature. Restores shortcut keys to factory defaults. Dell 75 Monitor Display Info DDC/CI Brightness/Contrast Display Info Auto Adjust DCC/CI Input Source HDMI CEC Off Color LCD Conditioning Off Display Firmware M2T101 Audio IP Address 10.0.50.
Icon Menu and Submenus LCD Conditioning Description Helps reduce minor cases of image retention. Depending on the degree of image retention, the program may take some time to run. Select On to start the process. Dell 75 Monitor This feature will help reduce minor cases of image retention. Depending on the degree of image retention, the program may take some time to run. Do you wish to continue? Yes No C7520QT Firmware Current Firmware version. IP Address Show IP Address.
OSD Warning Messages When the display does not support a particular resolution mode, you can see the following message: Dell 75 Monitor The current input timing is not supported by the monitor display. Please change your input timing to 3840 x 2160, 60Hz or any other monitor listed timing as per the monitor specifications. C7520QT This means that the display cannot synchronize with the signal that it is receiving from the computer.
If you press any button other than the power button, the following messages will appear depending on the selected input: Dell 75 Monitor No HDMI 1 signal from your device. Press any key on the keyboard or move the mouse or wake it up. If there is no display, press the monitor button again to select the correct input source. C7520QT If either HDMI 1, HDMI 2, HDMI 3, DP or VGA input is selected and the corresponding cable is not connected, a floating dialog box as shown below appears.
Dell 75 Monitor No HDMI 3 Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/C7520QT C7520QT or Dell 75 Monitor No DP Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/C7520QT C7520QT or Dell 75 Monitor No VGA Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/C7520QT C7520QT See Troubleshooting for more information.
Dell Web Management for Displays Before accessing the Dell Display Web Management feature, ensure the Ethernet is working normally. 1 2 3 4 5 6 7 • Ethernet Enable Touch and hold the touch key 5 on the front panel for 4 seconds to turn on , A network icon appears and is shown on the center for 4 seconds. • Ethernet Disable Touch and hold the touch key 5 on the front panel for 4 seconds to turn off , A network icon appears and is shown on the center for 4 seconds.
2. In the computer’s IP Properties tab, specify an IP Address by selecting Use the following IP Address and enter the following values: For IP Address: 10.0.50.101 and for Subnet Mask: 255.0.0.0 (leave all other entries as blanks). 3. The IP Address configuration would now look like this: Configure notebook IP Address to 10.0.50.101 Monitor IP Address 10.0.50.100 To access and use the web management tool, follow these steps: 1. Open a web browser and type the display’s IP Address (10.0.50.
3. The Home page opens: 4. Click Network Settings tab to see the network settings.
5. Click Display Control to see the display’s status. 6. Update Firmware. You can download the latest drivers from the Dell Support website at www.dell.com/support. 7. Upgrade firmware page and wait for 30 seconds.
8. Finished. Click on button to proceed after 8 seconds. 9. Click Security to set a password. 10. Click Crestron to control interface.
Troubleshooting WARNING: Before you begin any of the procedures in this section, follow the Safety Instructions. Self-Test Your display provides a self-test feature that allows you to check whether your display is functioning properly. If your display and computer are properly connected but the display screen remains dark, run the display self-test by performing the following steps: 1. Turn off both your computer and the display. 2. Unplug the video cable from the back of the computer.
or Dell 75 Monitor No HDMI 3 Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/C7520QT C7520QT or Dell 75 Monitor No DP Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/C7520QT C7520QT or Dell 75 Monitor No VGA Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/C7520QT C7520QT 4. This box also appears during normal system operation, if the video cable becomes disconnected or damaged. 5.
Built-in Diagnostics Your display has a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with your display, or with your computer and video card. 1 2 3 4 5 6 7 To run the built-in diagnostics: 1. Make sure that the screen is clean (no dust particles on the surface of the screen). 2. Touch and hold for 5 seconds in lock Select Option. Touch the self-inspection icon , A gray screen appears. 3.
Common Problems The following table contains general information about common display problems you might encounter and the possible solutions: NOTE: Auto Adjust function is applicable to VGA input only. Common Symptoms No Video/Power LED off What You Experience No picture No Video/Power LED on No picture or no brightness Poor Focus Picture is fuzzy, blurry, or ghosting Possible Solutions • Ensure that the video cable connecting the display and the computer is properly connected and secure.
Common Symptoms What You Experience Brightness Problems Picture too dim or • Reset the display to factory settings. too bright • Auto Adjust via OSD. • Adjust brightness & contrast controls via OSD. No Audio • Check PC setting if the playback is correctly selected. • Checking other video cables. • Ensure that the Speaker is enabled via OSD Audio problem Possible Solutions Geometric Distortion Screen not centered • Reset the display to factory settings. correctly • Auto Adjust via OSD.
Common Symptoms What You Experience Possible Solutions Image retention from a static image left on the display for a long period of time Touchscreen nonresponsive Faint shadow from the static image displayed appears on the screen Display cannot wake on touch • Use the Power Management feature to turn off the display at all times when not in use (for more information, see Power Management Modes). • Alternatively, use a dynamically changing screensaver. • Ensure Wake On Touch is enabled via OSD.
Touchscreen Problems Specific Symptoms What You Experience Possible Solutions • Use the Dell provided USB cable to connect your computer. • Make sure the power cable has a ground pin. Touch function • Unplug and replug the power cable to allow Touch report miss alignment or initialization of the touch module. error no touch function • Make sure computer supports USB 2.0 or later. • If the display cannot be detected by the computer, power off/on the monitor or unplug and replug the USB cable.
Specific Symptoms Wireless USB peripherals stop working when a USB 3.0 device is plugged in USB is not working What You Experience Wireless USB peripherals responding slowly or only working as the distance between itself and its receiver decreases No USB functionalities Possible Solutions • Increase the distance between the USB 3.0 peripherals and the wireless USB receiver. • Position your wireless USB receiver as close as possible to the wireless USB peripherals.
Appendix Safety Instructions For displays with glossy bezels the user should consider the placement of the display as the bezel may cause disturbing reflections from surrounding light and bright surfaces. WARNING: Use of controls, adjustments, or procedures other than those specified in this documentation may result in exposure to shock, electrical hazards, and/or mechanical hazards. For information on safety instructions, see the Safety, Environmental, and Regulatory Information (SERI). FCC Notices (U.S.
Setting Up Your Display Setting Display Resolution to 3840 x 2160 (maximum) For best performance, set the display resolution to 3840 x 2160 pixels by performing the following steps: In Windows 7, Windows 8 or Windows 8.1: 1. For Windows 8 or Windows 8.1 only, select the Desktop tile to switch to classic desktop. 2. Right-click on the desktop and click Screen Resolution. 3. Click the Dropdown list of the Screen Resolution and select 3840 x 2160. 4. Click OK. In Windows 10: 1.
Non-Dell computer In Windows 7, Windows 8 or Windows 8.1: 1. For Windows 8 or Windows 8.1 only, select the Desktop tile to switch to classic desktop. 2. Right-click on the desktop and click Personalization. 3. Click Change Display Settings. 4. Click Advanced Settings. 5. Identify your graphics controller supplier from the description at the top of the window (e.g. NVIDIA, ATI, Intel etc.). 6. Refer to the graphic card provider website for updated driver (for example, http://www.ATI.com or http://www.NVIDIA.
Maintenance Guidelines Cleaning Your Display WARNING: Before cleaning the display, unplug the display power cable from the electrical outlet. CAUTION: Read and follow the Safety Instructions before cleaning the display. For best practices, follow these instructions in the list below while unpacking, cleaning, or handling your display: • To clean your anti-static screen, lightly dampen a soft, clean cloth with water.
