Denon AVR-991 Service Manual

The Denon AVR-991 is a high-performance 9.2 channel AV receiver designed for home theater enthusiasts. It supports various audio formats, including Dolby Atmos and DTS:X, providing an immersive sound experience. The receiver features advanced connectivity options, including HDMI inputs, network streaming, and multi-room audio capabilities. 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 Audio/Video Media 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 9.2 channel amplification, HDMI inputs, network streaming, multi-room audio, advanced audio processing.

Feature	Description
HDMI Inputs	Multiple inputs for connecting video sources
Network Streaming	Access to online music services and local network streaming
Multi-Room Audio	Distribute audio to different rooms
Dolby Atmos	Immersive audio experience with overhead sound
DTS:X	Advanced audio format for dynamic sound placement
Auto Setup	Automatic calibration for optimal sound
Remote Control	Convenient control of the receiver and connected devices
On-Screen Display	Easy navigation through settings and options

Installation

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

Connect speakers: Use appropriate speaker wire for connections.
Connect video sources: Use HDMI cables for video input.
Connect to network: Use Ethernet or Wi-Fi for internet access.
Plug into AC power.

WARNING! Ensure all connections are secure to avoid damage.

First-Time Setup

Power on the receiver; follow on-screen prompts to configure settings.

Program channels automatically: Use the setup menu to scan for available channels.
Set audio preferences: Adjust settings for optimal sound quality.
Configure network settings: Connect to your home network.
For HDMI: Set up video output settings.

CAUTION! Ensure stable surface; avoid blocking ventilation.

Specifications

Channels: 9.2 channel amplification.
Power Output: 125W per channel (8 ohms).
Audio Formats: Dolby Atmos, DTS:X, Dolby TrueHD, DTS-HD Master Audio.
Video Inputs: 8 HDMI inputs, 2 HDMI outputs.
Network Connectivity: Ethernet, Wi-Fi, Bluetooth.
Dimensions: 17.1 x 14.5 x 6.3 inches.
Weight: 25.3 lbs.
Power Consumption: 600W (maximum).

Controls and Settings

Access OSD via remote control or front panel. Key controls include POWER, INPUT, VOLUME, and MENU.

Remote: POWER, Numeric buttons, INPUT, VOLUME, MUTE, SETUP.

Audio settings: Adjust bass, treble, balance, and surround sound options. Video settings: Adjust resolution and aspect ratio.

Connecting Devices

Connect various devices using HDMI, optical, and analog inputs.

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

Tip: Ensure all devices are powered off during connections.

Playing Audio/Video Media

Supports various audio and video formats for playback.

Insert media: Use appropriate input for playback.
Play: Use remote control to start playback.
Stop: Press STOP to halt playback.
Skip: Use NEXT/PREV buttons for navigation.
Adjust volume: Use VOLUME control on remote or front panel.

WARNING! Do not force connections; ensure proper handling of media.

Accessibility Features

Closed Captions: Enable in settings for supported media. Audio descriptions available for select content.

Care & Cleaning

Unplug before cleaning. Use a soft, dry cloth; avoid liquids or aerosols.

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

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
Remote does not work	Obstacles/batteries	Remove obstacles; point at IR sensor; install fresh batteries.
No sound	Connections/mute	Ensure receiver is on; check connections; adjust mute.
Picture not clear	Settings	Adjust video settings for clarity.
Channels not programming	Antenna/menu	Use auto-program in menu; ensure antenna connected.
Media not playing	Media/loading	Ensure media is loaded properly; check for damage.

Reset: Menu > System > Reset if available.

Service: 1-800-555-0199; www.denon.com