1. Introduction
Welcome to the instruction manual for your NAD T 748 7.1-Channel Home Theater Receiver. This manual provides essential information for the safe and efficient operation of your new audio-video component. Please read this manual thoroughly before using the receiver and retain it for future reference. It covers setup, operation, maintenance, and troubleshooting to ensure you get the best performance from your unit.
2. Important Safety Information
To prevent fire, electric shock, and damage to the unit, observe the following safety precautions:
- Power Source: Connect the unit only to an AC outlet of the voltage specified on the rear panel.
- Ventilation: Ensure adequate ventilation. Do not block ventilation openings. Allow sufficient space around the unit for proper airflow.
- Water and Moisture: Do not expose the unit to rain or moisture. Do not place objects filled with liquids, such as vases, on the unit.
- Heat: Do not place the unit near heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Cleaning: Unplug the unit from the wall outlet before cleaning. Use a dry cloth only.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
3. Setup
3.1 Unpacking
Carefully remove the receiver from its packaging. Please check that all accessories are present:
- NAD T 748 Receiver
- Remote Control with Batteries
- Power Cord
- FM/AM Antennas
- Setup Microphone (for auto calibration)
- Quick Start Guide
3.2 Connections
Before making any connections, ensure the receiver and all source components are powered off and unplugged from the AC outlet.
3.2.1 Speaker Connections
Connect your speakers to the corresponding terminals on the rear panel of the T 748. Observe correct polarity (+ to + and - to -) for all speakers. Ensure speaker wires are securely fastened and do not short-circuit.
- Front Left/Right: For main stereo sound.
- Center: For dialogue.
- Surround Left/Right: For ambient and directional effects.
- Surround Back Left/Right (or Zone 2): For 7.1 channel setup or multi-room audio.
- Subwoofer Pre-Out: Connect to a powered subwoofer.
3.2.2 Audio/Video Source Connections
Connect your audio and video source components (e.g., Blu-ray player, game console, cable box) to the appropriate input jacks on the receiver.
- HDMI Inputs: For high-definition audio and video. Connect HDMI cables from your sources to the HDMI IN ports.
- HDMI Output: Connect an HDMI cable from the HDMI OUT port to your TV or projector.
- Digital Audio Inputs (Optical/Coaxial): For digital audio sources without HDMI.
- Analog Audio Inputs (RCA): For older audio components.
3.2.3 Power Connection
Once all audio/video and speaker connections are made, connect the supplied power cord to the AC IN jack on the rear panel of the receiver, then plug the other end into a suitable AC wall outlet.
3.3 Initial Configuration
After connecting all components, power on your TV and the receiver.
3.3.1 On-Screen Display (OSD)
Access the receiver's setup menu via the On-Screen Display (OSD) on your TV. Use the remote control to navigate the menus.
3.3.2 Speaker Setup
Use the included setup microphone and the receiver's auto-calibration feature to automatically detect speaker configuration, distance, and levels for optimal sound performance. Alternatively, you can manually configure these settings.
3.3.3 Input Assignment
Assign appropriate names and input types to each connected source for easy selection during operation.
4. Operating Instructions
4.1 Basic Operation
- Power On/Off: Press the POWER button on the front panel or remote control.
- Volume Control: Use the VOLUME knob on the front panel or the VOLUME +/- buttons on the remote control.
- Input Selection: Press the desired input button (e.g., HDMI 1, CD, OPTICAL) on the front panel or remote control to switch between sources.
- Listening Modes: Select various listening modes (e.g., Stereo, Dolby Digital, DTS, NAD EARS) using the MODE button on the remote to optimize sound for different content.
4.2 Advanced Features
- Tone Controls: Adjust Bass and Treble levels via the setup menu or dedicated buttons on the remote for personalized sound.
- Zone 2 Operation: The T 748 supports a second audio zone. Refer to the full manual for detailed instructions on setting up and controlling Zone 2.
- Firmware Updates: Periodically check the NAD website for firmware updates to ensure your receiver has the latest features and performance enhancements. Follow the instructions provided with the update carefully.
5. Maintenance
5.1 Cleaning
To clean the exterior of the receiver, use a soft, dry cloth. For stubborn marks, lightly dampen the cloth with water or a mild, non-abrasive cleaner. Avoid using harsh chemicals or solvents, as they may damage the finish.
5.2 Storage
If you plan to store the receiver for an extended period, disconnect it from the power outlet and all connected components. Store it in a cool, dry place, away from direct sunlight and extreme temperatures.
6. Troubleshooting
If you encounter issues with your NAD T 748 receiver, consult the table below for common problems and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord disconnected; power outlet faulty; unit in standby. | Check power cord connection; try a different outlet; press POWER button. |
| No sound | Incorrect input selected; speaker wires loose; volume too low; mute activated. | Select correct input; check speaker connections; increase volume; deactivate mute. |
| No video | Incorrect input selected; HDMI cable loose or faulty; TV input incorrect. | Select correct input; check HDMI cables; ensure TV is on correct HDMI input. |
| Remote control not working | Batteries depleted; obstruction between remote and receiver; remote sensor blocked. | Replace batteries; remove obstructions; ensure remote sensor is clear. |
7. Specifications
The following specifications are typical for the NAD T 748 7.1-channel home theater receiver. For precise details, please refer to the official product documentation.
- Power Output: 7 x 60 Watts (FTC, 8 ohms, all channels driven)
- Frequency Response: 20Hz - 20kHz (±0.8dB)
- Signal-to-Noise Ratio: >92dB (A-weighted)
- Input Sensitivity: 250mV (line input)
- HDMI Inputs: 4
- HDMI Outputs: 1
- Digital Audio Inputs: 2 Optical, 2 Coaxial
- Analog Audio Inputs: 3 Stereo RCA
- Dimensions (W x H x D): Approximately 17.1 x 6.7 x 15.4 inches (435 x 170 x 390 mm)
- Weight: Approximately 25 lbs (11.3 kg)
8. Warranty and Support
NAD products are designed and manufactured to the highest quality standards. This product is covered by a limited warranty. Please refer to the warranty card included with your product or visit the official NAD website for detailed warranty terms and conditions specific to your region.
For technical support, service, or further assistance, please contact your authorized NAD dealer or visit the support section of the official NAD website. When contacting support, please have your product model and serial number ready.
