Denon DRA 635R Service Manual

The Denon DRA 635R is a high-performance stereo receiver designed for audiophiles. It features a robust amplifier section, multiple audio inputs, and advanced tuning capabilities. This manual provides essential information on 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 amplifier, AM/FM tuner, multiple audio inputs, remote control, headphone output, and tone controls.

Feature	Description
High-fidelity amplifier	Delivers clear and powerful sound
AM/FM tuner	Built-in tuner for radio stations
Multiple audio inputs	Connect various audio sources
Headphone output	For private listening
Tone controls	Adjust bass and treble settings
Remote control	Convenient operation from a distance

Installation

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

Connect speakers: Use speaker terminals for left and right channels.
Connect audio sources: Use RCA inputs for CD players, turntables, etc.
Plug into AC power.

WARNING! Ensure all connections are secure to avoid damage.

First-Time Setup

Power on the receiver; follow on-screen prompts for initial setup.

Program radio stations: Use the tuning buttons to scan for available stations.
Set audio preferences: Adjust bass and treble settings as desired.
Save favorite stations: Use the memory function to store preferred channels.

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

Specifications

Power Output: 70 watts per channel (8 ohms).
Frequency Response: 20 Hz - 20 kHz.
Inputs: 5 line-level inputs, 1 phono input.
Tuner: AM/FM with 30 station presets.
Dimensions: 17.1 x 5.9 x 14.2 inches.
Weight: 20 lbs.
Power Consumption: 150 watts.

Controls and Settings

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

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

Connecting Devices

Connect audio sources using RCA cables. Ensure the receiver is powered off during connections.

Turn off the receiver and devices before connecting.
Match cables to the appropriate inputs.
Select the correct input on the receiver.

Tip: Use high-quality cables for optimal sound quality.

Playing Audio Media

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

Insert media: Load CD or connect streaming device.
Play: Use the play button on the remote or front panel.
Adjust volume: Use the volume control to set desired levels.

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

Accessibility Features

Closed captions and audio descriptions available for compatible media.

Care & Cleaning

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

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

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. For support, visit www.denon.com or contact customer service.

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.
Sound distortion	Volume too high	Reduce volume level.
Channels not programming	Antenna/menu	Use auto-program in menu; ensure antenna connected.

Reset: Menu > System > Reset if available.

Service: Visit www.denon.com for support.