Marantz SR 780 User Manual

The Marantz SR 780 is a high-performance AV receiver featuring Dolby Digital and DTS decoding, 5.1 channel surround sound, 80 watts per channel, multiple audio/video inputs, AM/FM tuner, digital optical/coaxial inputs, speaker setup calibration, remote control, and advanced audio processing. Powered by 120V AC, 60Hz. 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. Audio Modes and Processing 8. Tuner Operation 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 5.1 channel amplifier, Dolby Digital/DTS decoder, AM/FM tuner, multiple input/output terminals, remote control, and setup microphone.

Feature	Description
Power output	80 watts per channel (all channels driven)
Audio decoding	Dolby Digital, DTS, Pro Logic
Inputs	6 audio/video inputs, 2 digital optical, 1 coaxial
Outputs	5.1 channel pre-outs, subwoofer output
Tuner	AM/FM with 40 station presets
Video conversion	Composite to S-Video upconversion
Setup calibration	Auto speaker setup with included microphone
Remote control	Learning remote with macro functions
Display	Fluorescent display with dimmer control
Headphone jack	Front panel 1/4" stereo jack

Installation

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

Connect speakers: Match polarity (+/-) for all channels (Front L/R, Center, Surround L/R, Subwoofer).
Connect source devices: Use appropriate inputs (DVD, CD, VCR, etc.).
Connect video display: Use monitor output to TV/projector.
Connect antenna: AM loop and FM wire antennas included.
Plug into AC power.

WARNING! Ensure proper ventilation; do not block cooling vents. Use correct speaker impedance (6-16 ohms).

First-Time Setup

Power on receiver; follow on-screen display or front panel indicators.

Auto speaker setup: Connect calibration microphone, press AUTO SETUP button.
Manual speaker settings: Adjust distance, level, and crossover in menu.
Input assignment: Configure digital inputs for connected sources.
Tuner preset: Auto-scan and store AM/FM stations.
Video setup: Configure output resolution and aspect ratio.

CAUTION! Disconnect power before making any cable connections.

Specifications

Power Output: 80W x 5 channels (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.08% (rated power)
Frequency Response: 20Hz-20kHz (+1/-3 dB)
Signal-to-Noise Ratio: 100 dB (line level)
Digital Inputs: 2 optical, 1 coaxial
Analog Inputs: 6 stereo audio, 6 composite video
Surround Formats: Dolby Digital, DTS, Pro Logic II
Tuner Section: AM/FM with RDS
Power Consumption: 450 watts maximum
Dimensions: 17-1/8" W x 6-3/8" H x 15-3/4" D
Weight: 24.3 lbs

Controls and Settings

Front Panel: POWER, INPUT SELECT, VOLUME, HEADPHONE, TONE, SETUP, AUTO SETUP.

Remote: POWER, INPUT SELECT, VOLUME, MUTE, SURROUND MODE, TONE, SETUP, numeric keys, transport controls.

Audio Settings: Bass, Treble, Balance, Loudness, Night Mode. Video Settings: Output resolution, aspect ratio. Speaker Settings: Distance, level, size, crossover. Input Setup: Digital input assignment, input rename. System Settings: OSD language, display dimmer, factory reset.

Connecting Devices

Audio Sources: CD player, turntable (with phono preamp), tape deck. Video Sources: DVD player, cable/satellite box, gaming console.

Turn off all devices before connecting.
Use highest quality connections available (digital preferred).
Assign digital inputs in setup menu for proper decoding.
Connect subwoofer using LFE or line-level output.

Tip: Use digital connections for best audio quality from DVD and CD sources.

Audio Modes and Processing

Supports various surround sound and listening modes.

Dolby Digital: Auto-detected from digital sources.
DTS: For DTS-encoded DVDs and media.
Pro Logic II: For matrix surround from stereo sources.
Direct Mode: Bypasses tone controls for pure audio.
Stereo: Conventional 2-channel playback.
Multi-channel Stereo: Same audio to all speakers.
Night Mode: Compresses dynamic range for late-night listening.

WARNING! Ensure proper speaker setup for optimal surround performance.

Tuner Operation

AM/FM tuner with 40 station presets and RDS display.

Tuning: Manual or auto-scan for stations.
Presets: Store up to 40 stations (20 FM, 20 AM).
RDS: Displays station information when available.
Audio: Mono/stereo selection for FM reception.

Care & Maintenance

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

Keep unit dry and away from moisture. Ensure proper ventilation around unit.

CAUTION! No user-serviceable parts inside. Refer servicing to qualified personnel.

Regulatory Information

FCC Part 15: Class B digital device compliant. CE marked for European compliance. Copyright © Marantz America, Inc. Dolby and DTS are registered trademarks. For support, visit www.marantz.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord, outlet	Check power connection; try different outlet; check fuse.
No sound	Input selection, mute	Verify input selection; check mute status; confirm speaker connections.
No surround sound	Source, settings	Ensure digital source; check surround mode; verify speaker setup.
Remote not working	Batteries, obstacles	Replace batteries; ensure line of sight to IR sensor.
Poor FM reception	Antenna, location	Adjust FM antenna; check for interference sources.
Overheating	Ventilation, load	Ensure adequate ventilation; check speaker impedance.

Reset: Press POWER while holding SURROUND MODE and TONE buttons.

Service: Contact authorized Marantz service center; www.marantz.com