Denon AVR 988 Manual

The Denon AVR 988 is a high-performance 7.1 channel AV receiver that supports various audio and video formats, including Dolby TrueHD and DTS-HD Master Audio. It features advanced HDMI connectivity, allowing for multiple input sources and 1080p video upscaling. The AVR 988 also includes a built-in AM/FM tuner, customizable audio settings, and a user-friendly interface for easy operation. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: 7.1 channel surround sound, HDMI inputs, AM/FM tuner, customizable audio settings, remote control.

Feature	Description
HDMI Inputs	Multiple inputs for connecting various devices
Audio Formats	Supports Dolby TrueHD, DTS-HD Master Audio
Video Upscaling	Upscales video to 1080p for enhanced quality
Built-in Tuner	AM/FM tuner for radio playback
Customizable Settings	Adjustable audio settings for personalized sound
Remote Control	Convenient remote for easy operation

Installation

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

1. Connect speakers: Use appropriate speaker wire for connections.
2. Connect video sources: Use HDMI or composite cables for video input.
3. 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.

1. Select input source: Use the INPUT button to choose the desired source.
2. Adjust audio settings: Access the menu to customize sound profiles.
3. Program radio stations: Use the tuner to scan for available stations.

CAUTION! Ensure stable surface; avoid overheating.

Specifications

• Channels: 7.1 channel surround sound.
• Audio Formats: Dolby TrueHD, DTS-HD Master Audio.
• Video Inputs: Multiple HDMI inputs, composite video.
• Power Output: 125 watts per channel.
• Dimensions: 17.1 x 13.2 x 6.3 inches.
• Weight: 24.3 lbs.
• Power Source: 120V AC, 60Hz.

Controls and Settings

Access OSD via the remote control. Front Panel: POWER, INPUT, VOLUME, TUNER.

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

Audio: Adjust settings for bass, treble, balance, and surround sound modes.

Connecting Devices

Connect various devices using HDMI, optical, or RCA cables.

1. Turn off the receiver and devices before connecting.
2. Match cables to ports (e.g., HDMI to HDMI).
3. Select input via the INPUT button on the remote.

Tip: Ensure all devices are powered off before making connections.

Playing Media

Supports various audio and video formats.

1. Insert media: Use the appropriate input source for playback.
2. Play: Use the remote to start playback.
3. Stop: Press STOP to halt playback.
4. Skip: Use the NEXT/PREV buttons for navigation.

WARNING! Do not force connections; ensure proper insertion.

Accessibility Features

Closed Captions: Enable in settings for supported media.

Care & Cleaning

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

CAUTION! Do not use abrasive cleaners or solvents.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 2026 Denon; trademarks of Denon Electronics.

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 in the menu.
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: Contact Denon support for assistance.