Denon DRA 685 Service Manual

The Denon DRA 685 is a high-quality stereo receiver designed for audiophiles, featuring advanced audio processing, multiple input options, and robust power output. It supports various audio formats and provides a rich listening experience. 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 Media 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-fidelity audio processing, multiple input options, remote control, headphone jack, and adjustable sound settings.

Feature	Description
Multiple Inputs	Supports various audio sources including CD, AUX, and digital inputs.
Power Output	Robust power output for driving speakers effectively.
Remote Control	Convenient remote for easy operation from a distance.
Headphone Jack	For private listening without disturbing others.
Sound Adjustments	Equalizer settings for personalized audio experience.

Installation

Unpack and inspect contents. Place on a stable surface.

Connect speakers: Use speaker terminals for left and right channels.
Connect audio sources: Use RCA or optical cables for input devices.
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 inputs: Use the remote to select and configure input sources.
Set audio preferences: Adjust settings for optimal sound quality.
Test speakers: Ensure all speakers are functioning correctly.

CAUTION! Ensure stable surface; avoid placing heavy objects on top.

Specifications

Power Output: 75W per channel (8 ohms).
Frequency Response: 10 Hz - 100 kHz.
Input Sensitivity: 200 mV for line inputs.
Signal-to-Noise Ratio: 100 dB.
Dimensions: 17.1 x 5.9 x 14.2 inches.
Weight: 20.5 lbs.
Power Consumption: 200W.

Controls and Settings

Access settings via the front panel or remote control. Key controls include power, volume, input selection, and sound adjustments.

Remote: Power, input selection, volume control, and preset buttons.

Audio settings: Bass, treble, balance, and loudness controls.

Connecting Devices

Connect audio sources using RCA, optical, or coaxial cables.

Turn off the receiver and devices before connecting.
Match cables to ports accordingly.
Select input via the remote control.

Tip: Ensure all devices are powered off during connection.

Playing Audio Media

Supports various audio formats including CD, MP3, and streaming.

Insert media: Load CD or connect streaming device.
Play: Use the remote to start playback.
Adjust volume: Use volume control for desired sound level.
Skip tracks: Use the remote to navigate through tracks.

WARNING! Do not force media into the slot; eject properly.

Accessibility Features

Remote control provides easy access to all functions for users with limited mobility.

Care & Cleaning

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

CAUTION! Do not spray cleaners directly on the unit.

Regulatory Information

Complies with FCC regulations for Class B digital devices. For support, visit www.denon.com or contact customer service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Remote does not work	Obstacles/batteries	Remove obstacles; replace batteries.
No sound	Connections/mute	Check connections; ensure mute is off.
Distorted sound	Settings	Adjust equalizer settings.
Input not recognized	Connection issue	Check input connections; try a different cable.

Reset: Menu > System > Reset if available.

Service: Contact customer support for assistance.