Denon DRA 275R Service Manual

The Denon DRA 275R is a high-quality stereo receiver designed to deliver exceptional audio performance. It features a variety of inputs for connecting multiple audio sources, including CD players, turntables, and digital devices. The receiver supports AM/FM radio, has a built-in phono stage, and offers advanced sound processing 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 Media 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Stereo receiver, AM/FM tuner, multiple audio inputs, remote control, headphone jack, and adjustable sound settings.

Feature	Description
AM/FM Tuner	Built-in tuner for radio reception
Phono Input	Dedicated input for turntables
Headphone Jack	For private listening
Multiple Audio Inputs	Connect various audio sources
Remote Control	Convenient operation from a distance
Adjustable Sound Settings	Customize audio output to preference

Installation

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

Connect speakers: Use appropriate speaker wire for connections.
Connect audio sources: Use RCA cables 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 if applicable.

Program radio stations: Use the tuning buttons to find and save stations.
Set audio preferences: Adjust bass, treble, and balance settings.
For phono input: Ensure proper grounding for turntables.

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

Specifications

Power Output: 2 x 70W (8 ohms).
Frequency Response: 20 Hz - 20 kHz.
Input Sensitivity: 150 mV (line), 2.5 mV (phono).
Signal-to-Noise Ratio: 100 dB.
Terminals: RCA inputs, speaker outputs, headphone jack.
Power Source: 120V AC, 60Hz.
Dimensions: 17.1 x 5.9 x 13.4 inches.

Controls and Settings

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

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

Connecting Devices

Connect audio sources using RCA cables. Ensure proper input selection on the receiver.

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

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

Playing Audio Media

Supports various audio formats from connected devices.

Power on the receiver and select the appropriate input.
Play audio from the connected device.
Adjust volume and sound settings as needed.

WARNING! Avoid excessive volume levels to prevent speaker damage.

Accessibility Features

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

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.
Sound distortion	Volume too high	Reduce volume level.
Radio stations not tuning	Antenna/menu	Ensure antenna is connected; use auto-tune function.

Reset: Menu > System > Reset if available.

Service: Contact Denon support for assistance.