Denon PMA 320 Service Manual

The Denon PMA 320 is a high-quality integrated amplifier designed to deliver exceptional audio performance. With a power output of 70 watts per channel, it features advanced circuitry to ensure clear and dynamic sound reproduction. The amplifier supports various input sources, including phono, CD, and auxiliary, making it versatile for different audio setups. 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. Operating the Amplifier 8. Maintenance 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Integrated amplifier, multiple input options, tone control, headphone output, remote control.

Feature	Description
Power Output	70 watts per channel
Input Options	Phono, CD, AUX, and more
Tone Control	Bass and treble adjustments
Headphone Output	For private listening
Remote Control	Convenient operation from a distance

Installation

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

Connect speakers: Use speaker wire to connect to the output terminals.
Connect audio sources: Use RCA cables for CD, phono, and auxiliary inputs.
Plug into AC power.

WARNING! Ensure all connections are secure to avoid damage.

First-Time Setup

Power on the amplifier; select the desired input source.

Adjust volume: Use the volume knob to set the desired listening level.
Set tone controls: Adjust bass and treble to your preference.
For phono input: Ensure the turntable is properly connected and set to the correct input.

CAUTION! Start with a low volume to avoid speaker damage.

Specifications

Power Output: 70 watts per channel.
Frequency Response: 5 Hz - 100 kHz.
Input Impedance: 47 kΩ (phono).
Signal-to-Noise Ratio: 100 dB.
Dimensions: 440 mm x 150 mm x 350 mm.
Weight: 8 kg.
Power Supply: AC 120V, 60Hz.

Controls and Settings

Access controls via the front panel: Volume, input selector, tone controls.

Remote: Volume, input selection, mute, and power.

Adjustments: Fine-tune sound with bass and treble controls.

Connecting Devices

Connect speakers and audio sources using appropriate cables.

Turn off the amplifier before connecting devices.
Match cables to the correct input/output ports.
Select input via the remote or front panel.

Tip: Ensure all connections are secure to prevent audio issues.

Operating the Amplifier

Use the remote or front panel to control playback and volume.

Power on: Press the power button.
Select input: Use the input selector.
Adjust volume: Turn the volume knob or use the remote.

WARNING! Avoid sudden volume changes to protect speakers.

Maintenance

Keep the amplifier clean and dust-free. Unplug before cleaning.

CAUTION! Do not use liquids; use a dry cloth only.

Regulatory Information

This product complies with FCC regulations for residential use. For support, visit www.denon.com or contact customer service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Incorrect input/source	Check input selection and connections.
Distorted sound	Volume too high	Lower the volume and check speaker connections.
Remote not working	Batteries	Replace batteries in the remote.
Overheating	Blocked ventilation	Ensure proper airflow around the amplifier.

Reset: Unplug for 10 seconds to reset.

Service: Contact Denon support for assistance.