Denon AVR 791 Service Manual

The Denon AVR 791 is a high-performance 7.1 channel AV receiver that supports various audio and video formats. It features advanced processing capabilities, including Dolby TrueHD and DTS-HD Master Audio, ensuring an immersive home theater experience. The receiver is equipped with multiple HDMI inputs, allowing for seamless connectivity with various devices. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Playing Media 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 7.1 channel surround sound, HDMI inputs, built-in AM/FM tuner, remote control, and various audio processing technologies.

Feature	Description
HDMI Inputs	Multiple HDMI inputs for connecting various devices
Audio Formats	Supports Dolby TrueHD, DTS-HD Master Audio
Zone 2 Output	Allows for multi-room audio setup
Built-in Tuner	AM/FM radio with preset stations
Remote Control	Full-featured remote for easy operation

Installation

Unpack and inspect contents. Place the receiver on a stable surface.

Connect speakers: Use appropriate speaker wire for connections.
Connect video sources: Use HDMI or component video cables.
Plug into AC power.

WARNING! Ensure all connections are secure to avoid damage.

First-Time Setup

Power on the receiver; follow on-screen prompts.

Program channels automatically: Use the setup menu to scan for available channels.
Set audio preferences: Adjust settings for optimal sound quality.
Configure video settings: Set resolution and aspect ratio according to your display.

CAUTION! Ensure stable surface; avoid overheating.

Specifications

Channels: 7.1 channel surround sound.
Power Output: 100 watts per channel (8 ohms).
Audio Formats: Supports Dolby TrueHD, DTS-HD Master Audio.
HDMI Inputs: 6 HDMI inputs, 1 HDMI output.
Weight: 22.5 lbs (10.2 kg).
Dimensions: 17.1 x 13.4 x 6.3 inches.
Power Consumption: 600 watts (maximum).

Controls and Settings

Access OSD via the remote control or front panel. Key controls include power, volume, input selection, and setup menu.

Remote: POWER, INPUT, VOLUME, MUTE, and various audio mode buttons.

Audio settings: Adjust bass, treble, and balance. Video settings: Adjust brightness, contrast, and color.

Connecting Devices

Connect various devices using HDMI, optical, or analog connections.

Turn off the receiver and devices before connecting.
Match cables to ports (e.g., HDMI to HDMI).
Select input via the remote control.

Tip: Ensure all devices are powered off during connections.

Playing Media

Supports various media formats including CDs, DVDs, and streaming services.

Insert media: Load disc or connect streaming device.
Play: Use the remote control to start playback.
Stop: Press STOP to halt playback.
Skip: Use NEXT/PREV buttons for tracks.

WARNING! Do not force discs into the tray; eject properly.

Accessibility Features

Closed Captions: Enable in the setup menu. Audio descriptions available for compatible media.

Care & Cleaning

Unplug before cleaning. Use a dry cloth only; avoid liquids.

CAUTION! Do not spray liquids; keep away from heat sources.

Regulatory Information

FCC compliance: This device complies with Part 15 of the FCC Rules. For support, visit www.denon.com or contact customer service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Incorrect input selection	Check input source and settings.
Remote not working	Batteries	Replace batteries in the remote.
Poor video quality	Connection issues	Check HDMI or video connections.
Device not recognized	Compatibility	Ensure device is compatible with the receiver.

Reset: Menu > System > Reset if available.

Service: Visit www.denon.com for support.