Marantz HD770 Manual

The Marantz HD770 is a high-performance audio component featuring advanced digital processing, multiple input/output connections, professional-grade construction, and user-friendly controls. Designed for audiophiles and professional applications, it delivers exceptional sound quality with precision tuning capabilities. Below are key sections covering specifications, installation, operation, connectivity, and maintenance.

Features at a Glance

Key components: Digital signal processor, multiple input/output ports, remote control, LCD display, professional-grade connectors.

Feature	Description
Digital Inputs	Optical and coaxial digital audio inputs
Analog Inputs	RCA and XLR balanced inputs
Output Connections	RCA and XLR balanced outputs
Remote Control	Full-function infrared remote
LCD Display	Backlit display for status and settings
Power Supply	Internal regulated power supply
Processing Modes	Multiple DSP modes and EQ settings
Headphone Output	Front-panel 1/4" headphone jack
Volume Control	Digital volume control with precision steps
Standby Mode	Low-power standby operation

Installation

Unpack and inspect all components. Place on stable, vibration-free surface.

1. Connect audio sources: Use appropriate cables for digital or analog inputs.
2. Connect to amplifier: Use balanced XLR or unbalanced RCA outputs.
3. Connect power: Use supplied power cable to AC outlet.
4. Connect remote sensor: Position for clear line of sight.

WARNING! Ensure proper ventilation; do not block cooling vents. Use stable power source.

First-Time Setup

Power on unit; initialize system settings.

1. Input selection: Choose between digital and analog inputs.
2. Output configuration: Set output level and impedance matching.
3. DSP settings: Select preferred processing mode.
4. Display settings: Adjust brightness and timeout.

CAUTION! Allow unit to reach room temperature before operation.

Specifications

• Frequency Response: 20Hz - 20kHz ±0.5dB
• Signal-to-Noise Ratio: >110dB
• Total Harmonic Distortion: <0.005%
• Inputs: Optical, Coaxial, RCA, XLR
• Outputs: RCA, XLR, Headphone
• Power Consumption: 25W maximum
• Power Requirements: 100-240V AC, 50/60Hz
• Dimensions: 430mm x 320mm x 85mm
• Weight: 5.2kg

Controls and Settings

Front panel: POWER, INPUT SELECT, VOLUME, MENU, ENTER. Remote: All front panel functions plus direct access keys.

Menu System: Input selection, output level, DSP modes, display settings, system configuration. Processing: EQ settings, crossover frequencies, time alignment, dynamic range control.

Connecting Devices

Digital sources: Optical/coaxial cables. Analog sources: RCA/XLR cables. Output: To amplifier/powered speakers.

1. Turn off all equipment before making connections.
2. Use high-quality cables for optimal performance.
3. Match input types to source output capabilities.
4. Secure all connections firmly.

Tip: Keep digital and analog cables separated to reduce interference.

Operation Modes

Multiple operating modes for different applications.

1. Direct Mode: Bypasses all processing for pure signal path.
2. DSP Modes: Various preset equalization curves.
3. Custom Mode: User-defined settings storage.
4. Headphone Mode: Automatic switching when headphones connected.

Note: Settings are retained in memory during power-off.

Advanced Features

Digital signal processing with user-configurable parameters. Remote control operation with learning capability. Multiple preset memories.

Care & Maintenance

Clean with dry, soft cloth only. Do not use chemicals or abrasives. Ensure proper ventilation.

CAUTION! Unplug unit before cleaning. Avoid moisture and extreme temperatures.

Regulatory Information

Complies with FCC Part 15 Class B, CE, RoHS directives. Copyright © Marantz. For technical support, visit www.marantz.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cable/outlet	Check power connection; try different outlet.
No sound	Input selection/connections	Verify input selection; check cable connections.
Distorted sound	Input level/connections	Adjust input level; check for loose connections.
Remote not working	Batteries/obstructions	Replace batteries; ensure clear line of sight.
Display issues	Settings/power	Check display settings; cycle power.

Reset: Hold MENU + POWER for 10 seconds to factory reset.

Service: Contact authorized Marantz service center for repairs.