Denon AVR 788 Service Manual

The Denon AVR 788 is a high-performance 7.1 channel AV receiver designed for home theater enthusiasts. It features advanced audio and video processing capabilities, including support for Dolby TrueHD, DTS-HD Master Audio, and various surround sound formats. The receiver is equipped with multiple HDMI inputs, allowing for easy connectivity to various devices, and offers extensive customization options for audio settings. 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: 7.1 channel audio, multiple HDMI inputs, advanced audio processing, remote control, and customizable audio settings.

Feature	Description
HDMI Inputs	Multiple inputs for connecting various devices.
Audio Formats	Supports Dolby TrueHD, DTS-HD Master Audio.
Zone 2/Zone 3 Outputs	Allows for multi-room audio distribution.
On-Screen Display	Easy navigation through settings and options.
Remote Control	Full control of receiver functions from a distance.
Customizable EQ	Adjust audio settings to personal preference.
Firmware Updates	Keep the receiver up to date with the latest features.

Installation

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

Connect speakers: Use appropriate gauge speaker wire for connections.
Connect video sources: Use HDMI or component video cables.
Plug into AC power: Ensure the power outlet is suitable for the receiver's requirements.

WARNING! Ensure all connections are secure to avoid damage.

First-Time Setup

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

Select audio output: Choose between stereo or surround sound.
Program channels: Use the setup menu to scan for available channels.
Adjust audio settings: Customize EQ and speaker settings as needed.

CAUTION! Ensure stable surface; avoid blocking ventilation.

Specifications

Channels: 7.1 channel audio.
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: 20 lbs (9 kg).
Dimensions: 17.1 x 13.4 x 6.3 inches.
Power Consumption: 500 watts (maximum).
Operating Temperature: Standard room temperature.

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, and balance. Video settings: Adjust brightness, contrast, and color.

Connecting Devices

Connect devices using HDMI, optical, or RCA cables as appropriate.

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 before making connections.

Playing Audio/Video Media

Supports various audio and video formats.

Insert media: Use appropriate input method (e.g., HDMI).
Play: Use remote control to start playback.
Stop: Press STOP to halt playback.
Skip: Use NEXT/PREV buttons for tracks.
Adjust volume: Use VOLUME control on remote or front panel.

WARNING! Do not force media; ensure proper insertion.

Accessibility Features

Closed Captions: Enable in settings for accessible viewing.

Care & Cleaning

Unplug before cleaning. Use a dry cloth only; 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 in the menu.
Channels not programming	Antenna/menu	Use auto-program in menu; ensure antenna connected.
Media not playing	Media/loading	Ensure media loaded properly; eject and reload; check for damage.

Reset: Menu > System > Reset if available.

Service: 1-877-467-4289; www.denon.com