Marantz SR-73 Owner's Manual

The Marantz SR-73 is a high-performance audio/video receiver featuring Dolby Digital and DTS surround sound processing, multiple audio/video inputs, AM/FM tuner, remote control, and advanced audio calibration. With 100 watts per channel, this receiver delivers exceptional sound quality for home theater systems. Below are key sections for setup, operation, features, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Audio Setup 8. Remote Control 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Dolby Digital/DTS decoder, AM/FM tuner, multiple audio/video inputs, remote control, speaker terminals.

Feature	Description
Power Output	100 watts per channel (8 ohms)
Surround Modes	Dolby Digital, DTS, Pro Logic
Audio Inputs	6 analog, 2 digital (coaxial/optical)
Video Inputs	3 composite, 2 S-Video
Tuner	AM/FM with 30 presets
Speaker Terminals	5-channel plus subwoofer
Remote Control	Full-function learning remote
Display	Fluorescent display with dimmer
Headphone Jack	Front panel 1/4" stereo
AC Power	120V, 60Hz

Installation

Unpack and inspect contents. Place in well-ventilated area.

Connect speakers: Use speaker wire to connect front, center, surround speakers and subwoofer.
Connect audio sources: CD player, tape deck, turntable to appropriate inputs.
Connect video sources: DVD player, VCR, cable box to video inputs.
Connect antenna: AM loop and FM wire antennas to rear terminals.
Plug into AC power.

WARNING! Ensure proper ventilation; do not block vents. Use correct speaker impedance.

First-Time Setup

Power on receiver; follow initial setup procedure.

Speaker setup: Configure speaker sizes and distances in menu.
Tuner setup: Auto-scan and store AM/FM stations.
Input assignment: Assign sources to input buttons.
Surround mode: Select default listening mode.
Volume calibration: Set reference level using test tones.

CAUTION! Turn volume down before powering on to prevent speaker damage.

Specifications

Power Output: 100W x 5 (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.05%
Frequency Response: 20Hz-20kHz (+0/-3dB)
Signal-to-Noise Ratio: 100dB
Input Sensitivity: 200mV
Digital Inputs: 2 optical, 2 coaxial
Video Bandwidth: 10MHz
Tuner Sensitivity: FM 1.0uV, AM 300uV/m
Power Consumption: 350W maximum
Dimensions: 17.1" W x 6.4" H x 15.4" D
Weight: 24.2 lbs

Controls and Settings

Front Panel: POWER, VOLUME, INPUT SELECT, TUNER PRESETS, HEADPHONE, DISPLAY.

Remote: POWER, INPUT SELECT, VOLUME, MUTE, SURROUND MODE, TUNER, TONE, SLEEP.

Audio: BASS, TREBLE, BALANCE, LOUDNESS, SURROUND MODE (DOLBY DIGITAL, DTS, PRO LOGIC). Video: INPUT SELECT, VIDEO MUTE. Tuner: PRESET, AUTO SCAN, MANUAL TUNE. System: SPEAKER SETUP, INPUT RENAME, RESET.

Connecting Devices

Audio: CD, TAPE, PHONO, AUX. Video: DVD, VCR, CABLE. Digital: OPTICAL, COAXIAL.

Turn off receiver before connecting devices.
Match cable types to inputs (analog/digital).
Use high-quality cables for best performance.
Select input via front panel or remote.

Tip: Keep audio and video cables separated to reduce interference.

Audio Setup

Advanced audio configuration for optimal performance.

Speaker configuration: Set size (LARGE/SMALL) and crossover.
Distance calibration: Set speaker distances in feet/meters.
Level calibration: Adjust channel levels using test tone.
Surround mode selection: Choose appropriate mode for source.
Tone controls: Adjust bass/treble to room acoustics.
Loudness: Enable for better low-volume listening.

WARNING! Use proper speaker impedance to avoid amplifier damage.

Remote Control

Full-function remote with learning capability.

Basic functions: POWER, VOLUME, MUTE, INPUT SELECT. Advanced: SURROUND MODE, TONE, SLEEP TIMER. Learning: Program commands from other remotes. Preset: Device selection (TV, VCR, CABLE).

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth only; avoid chemicals.

CAUTION! Do not use liquid cleaners; keep away from moisture. Ensure proper ventilation.

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Speaker connections/mute	Check speaker wires; ensure mute is off; verify input selection.
No power	Power cord/outlet	Check power connection; try different outlet; check fuse.
Poor FM reception	Antenna placement	Reposition FM antenna; ensure proper connection.
Remote not working	Batteries/obstructions	Replace batteries; point directly at sensor; remove obstacles.
Overheating	Ventilation	Ensure adequate ventilation; clear vents; reduce volume.
No digital sound	Input selection/connections	Select digital input; check optical/coaxial connections.

Reset: Hold TONE and SURROUND MODE while powering on.

Service: Contact authorized Marantz service center.