marantz sr 685 manual

The Marantz SR 685 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, remote control, on-screen display, and advanced audio calibration. Powered by 120V AC, 60Hz. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: 5.1 channel amplifier, Dolby Digital/DTS decoder, AM/FM tuner, multiple audio/video inputs, remote control, on-screen display.

Feature	Description
Power Output	80 watts per channel (all channels driven)
Audio Decoding	Dolby Digital, DTS, Pro Logic
Inputs	4 audio/video inputs, 2 digital audio inputs
Outputs	5.1 channel pre-outs, subwoofer output
Tuner	AM/FM with 30 station presets
Remote Control	Full system remote with learning capability
On-Screen Display	Graphical user interface for easy setup
Audio Calibration	Auto setup with included microphone
Speaker Terminals	Binding post connectors for all channels
Power Requirements	120V AC, 60Hz

Installation

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

1. Connect speakers: Use appropriate gauge wire for front, center, surround, and subwoofer channels.
2. Connect source devices: Use audio/video inputs for DVD player, cable box, gaming console.
3. Connect TV: Use monitor output to television.
4. Connect antenna: Attach AM and FM antennas to respective terminals.
5. Plug into AC power.

WARNING! Ensure adequate ventilation; do not block cooling vents. Use proper speaker wire gauge.

First-Time Setup

Power on receiver; follow on-screen setup wizard.

1. Auto calibration: Connect setup microphone; run auto calibration for optimal sound.
2. Input assignment: Assign sources to appropriate inputs (DVD, CD, AUX, etc.).
3. Speaker configuration: Set speaker sizes and distances.
4. Tuner setup: Auto-scan for AM/FM stations.
5. Remote programming: Program remote for other components.

CAUTION! Ensure all connections are secure before powering on.

Specifications

• Power Output: 80W x 5 channels (8 ohms, 20Hz-20kHz)
• Total Harmonic Distortion: 0.08%
• Frequency Response: 10Hz-100kHz
• Signal-to-Noise Ratio: 100dB
• Input Sensitivity: 200mV
• Digital Inputs: 2 optical, 1 coaxial
• Analog Inputs: 4 stereo pairs
• Video Inputs: 3 composite, 1 S-Video
• Speaker Impedance: 6-16 ohms
• Power Consumption: 450W maximum

Controls and Settings

Front Panel: POWER, INPUT SELECTOR, VOLUME, TUNER PRESETS, HEADPHONE JACK.

Remote: POWER, INPUT SELECT, VOLUME, MUTE, SURROUND MODE, TUNER, SETUP, Numeric keypad.

Audio Settings: Bass, Treble, Balance, Loudness, Surround Mode (Dolby Digital, DTS, Pro Logic). Video Settings: Input source, OSD settings. Tuner Settings: Preset memory, auto scan. System Settings: Speaker configuration, input rename, remote control setup.

Connecting Devices

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

1. Turn off all components before connecting.
2. Use high-quality cables for best performance.
3. Match audio cables to correct inputs (red/white RCA).
4. Connect digital sources to optical/coaxial inputs.
5. Select input via front panel or remote control.

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

Audio Setup and Calibration

Advanced audio calibration for optimal surround sound.

1. Auto calibration: Place microphone at listening position; run auto setup.
2. Manual adjustments: Fine-tune speaker levels, distances, and crossover settings.
3. Surround modes: Select appropriate mode for content (movie, music, game).
4. Bass management: Set subwoofer crossover and level.
5. Dynamic range: Adjust for night listening or full dynamic range.

WARNING! Ensure proper speaker phase and placement for optimal performance.

Remote Control Operation

Universal remote controls receiver and other components.

1. Device selection: Press device button (TV, DVD, CBL, etc.).
2. Volume control: Master volume controls receiver output.
3. Input selection: Switch between audio/video sources.
4. Surround mode: Cycle through available sound modes.
5. Learning function: Program remote to control other brand components.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior. Keep ventilation openings clear.

CAUTION! Do not use liquid cleaners or aerosols. Avoid moisture and extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Marantz America, Inc. Dolby and DTS are registered trademarks. For support, visit www.marantz.com or contact customer service at 1-800-270-2744.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Input selection/volume	Check input selection; increase volume; verify speaker connections.
No picture	Video connection/monitor	Verify video cables; check monitor input selection; ensure monitor is on.
Remote not working	Batteries/obstructions	Replace batteries; ensure clear path to IR sensor; check device selection.
Overheating	Ventilation blockage	Ensure adequate ventilation; clear vents; reduce volume if excessive.
No tuner reception	Antenna connection	Verify antenna connections; reposition antennas; rescan stations.

Reset: Press and hold TUNER PRESET + STATUS while powering on for factory reset.

Service: 1-800-270-2744; www.marantz.com