1. Introduction
This manual provides essential information for the safe and efficient operation of your NEC M551 MultiSync 55-inch 4K UHD Digital Signage Display. Please read this manual thoroughly before using the product and retain it for future reference.
The NEC M551 is designed for digital signage applications, offering a 55-inch 4K UHD (3840 x 2160) LED-backlit LCD display with HDR capabilities. Its design supports both horizontal and vertical orientation for flexible installation.
Figure 1: Front view of the NEC M551 MultiSync 55-inch 4K UHD Digital Signage Display. The display shows a vibrant image of a blue flower with water droplets, highlighting its 4K UHD resolution and color capabilities.
2. Safety Information
Always observe the following safety precautions to prevent injury and damage to the display.
- Power Source: Connect the display only to the specified power supply.
- Ventilation: Ensure adequate ventilation around the display. Do not block ventilation openings.
- Placement: Place the display on a stable, level surface or mount it securely according to installation guidelines. Avoid direct sunlight, heat sources, and excessive moisture.
- Cleaning: Disconnect power before cleaning. Use a soft, dry cloth. Avoid liquid cleaners or aerosol sprays.
- Servicing: Do not attempt to service the display yourself. Refer all servicing to qualified service personnel.
3. Setup
3.1 Unpacking the Display
- Carefully open the packaging and remove the display.
- Check for any visible damage. If damaged, contact your dealer immediately.
- Ensure all accessories are present: power cord, remote control, batteries, and documentation.
3.2 Mounting and Placement
The NEC M551 supports both horizontal and vertical orientations. Ensure the mounting solution (e.g., wall mount, stand) is rated for the display's weight (approximately 59 lbs / 26.7 kg) and dimensions (56.3 x 36.2 x 9.8 inches).
- For wall mounting, use a VESA-compatible mount.
- Maintain sufficient space around the display for heat dissipation.
3.3 Connecting Peripherals
The display features various input ports for connectivity.
- Power Connection: Connect the power cord to the display's AC inlet and then to a grounded power outlet.
- Video Input: Connect your video source (e.g., media player, PC) to the display using an HDMI cable. The display supports 4K UHD resolution via HDMI.
- Other Connections: Refer to the port labels on the display for additional connections such as USB, DisplayPort, or audio outputs, if applicable.
4. Operating Instructions
4.1 Powering On/Off
- Power On: Press the power button on the remote control or on the display's control panel.
- Power Off: Press the power button again. The display will enter standby mode. For complete power off, disconnect the power cord.
4.2 Basic Display Settings
Use the remote control to navigate the On-Screen Display (OSD) menu.
- Input Selection: Press the "Input" button to cycle through available video sources (HDMI, DisplayPort, etc.).
- Picture Settings: Adjust brightness, contrast, color temperature, and aspect ratio (16:9 native). The display supports High Dynamic Range (HDR).
- Audio Settings: Adjust volume and audio output options.
- Advanced Settings: Explore options for digital signage features, scheduling, and network settings if applicable to your model.
4.3 Using the Remote Control
The remote control provides access to all display functions. Ensure batteries are correctly inserted.
- Power: Turns the display on or off.
- Menu: Opens the OSD menu.
- Navigation Buttons: Used to move through menu options.
- Enter/OK: Confirms selections.
- Volume +/-: Adjusts audio volume.
- Source: Selects input source.
5. Maintenance
5.1 Cleaning the Display
- Turn off the display and disconnect the power cord.
- Gently wipe the screen with a soft, lint-free cloth. For stubborn marks, lightly dampen the cloth with water.
- Clean the display casing with a soft, dry cloth.
- Do not use: Alcohol, benzene, thinners, or abrasive cleaners, as these can damage the screen or casing.
5.2 General Care
- Avoid placing heavy objects on the display.
- Protect the display from extreme temperatures and humidity.
- If the display will not be used for an extended period, disconnect it from the power outlet.
6. Troubleshooting
Before contacting support, try the following solutions for common issues.
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord disconnected; Power outlet faulty | Ensure power cord is securely connected; Test outlet with another device. |
| No image | Incorrect input source; Video cable loose or faulty; Source device off | Select correct input source via remote; Check video cable connections; Ensure source device is powered on. |
| Poor image quality | Incorrect resolution; Cable quality; Display settings | Ensure source device outputs 4K UHD; Use high-quality HDMI cables; Adjust picture settings in OSD menu. |
| Remote control not working | Dead batteries; Obstruction; Incorrect aiming | Replace batteries; Remove obstructions; Point remote directly at the display's IR receiver. |
7. Specifications
Key technical specifications for the NEC M551 MultiSync display.
- Model: NEC M551 MultiSync
- Screen Size: 55 Inches (Diagonal Class)
- Display Technology: LED-Backlit LCD
- Resolution: 4K UHD (3840 x 2160p)
- Aspect Ratio: 16:9
- Refresh Rate: 60 Hz
- Special Features: High Dynamic Range (HDR)
- Connectivity: HDMI (multiple inputs), DisplayPort, USB (specific ports may vary)
- Item Weight: Approximately 59 Pounds (26.7 kg)
- Product Dimensions (W x H x D): Approximately 56.3 x 36.2 x 9.8 inches (143 x 91.9 x 24.9 cm)
- Orientation: Horizontal and Vertical support
- Color: Black
8. Warranty & Support
8.1 Warranty Information
NEC provides a limited warranty for this product. The specific terms and duration of the warranty may vary by region and purchase date. Please refer to the warranty card included with your product or visit the official NEC website for detailed warranty information.
Note: Keep your proof of purchase (receipt or invoice) as it will be required for any warranty claims.
8.2 Customer Support
For technical assistance, service, or further inquiries, please contact NEC customer support.
- Online Support: Visit the official NEC website for FAQs, driver downloads, and support resources.
- Telephone Support: Refer to your product documentation or the NEC website for regional contact numbers.
- Service Centers: Information on authorized service centers can be found on the NEC website.
When contacting support, please have your product model (M551) and serial number ready.
