Marantz CD Recorder CDR631 Manual

The Marantz CD Recorder CDR631 is a professional-grade CD recording system featuring digital and analog recording capabilities, CD-R/RW compatibility, digital optical and coaxial inputs, analog RCA inputs, sampling rate conversion, track marking, finalization, and editing functions. 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. Recording Operations 8. Playback Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: CD recording mechanism, digital/analog inputs, recording level controls, display panel, remote control, and editing functions.

Feature	Description
Digital Optical Input	For digital audio recording from compatible sources
Digital Coaxial Input	Alternative digital input connection
Analog RCA Inputs	For recording from analog audio sources
CD-R/RW Compatibility	Supports both CD-R and CD-RW media
Sampling Rate Conversion	Converts 32kHz/48kHz to 44.1kHz
Track Marking	Automatic and manual track division
Finalization	Makes recorded CDs playable on other players
Editing Functions	Track delete, divide, and combine operations
Recording Level Control	Manual and automatic level adjustment
Sync Recording	Starts recording automatically when signal detected

Installation

Unpack and inspect contents. Place on stable, level surface with adequate ventilation.

Connect audio sources: Use digital optical/coaxial for digital sources; RCA cables for analog sources.
Connect to amplifier: Use audio output RCA cables to connect to your amplifier/receiver.
Power connection: Plug into AC power outlet.
Antenna connection: Connect FM/AM antenna for tuner recording (if applicable).

WARNING! Ensure proper ventilation around unit; do not block ventilation openings.

First-Time Setup

Power on unit; initialize system settings.

Disc preparation: Insert blank CD-R or CD-RW disc.
Input selection: Choose appropriate input source (digital/analog).
Recording level adjustment: Set appropriate recording levels using level meters.
Recording mode selection: Choose between analog and digital recording modes.
Sampling rate setting: Configure sampling rate conversion if needed.

CAUTION! Use only recommended CD-R/RW media for optimal performance.

Specifications

Recording Formats: CD-DA (Red Book standard)
Supported Media: CD-R, CD-RW (74min/80min)
Frequency Response: 20Hz-20kHz (±1dB)
Signal-to-Noise Ratio: >90dB (digital), >85dB (analog)
Total Harmonic Distortion: <0.05%
Digital Inputs: Optical, Coaxial (32kHz/44.1kHz/48kHz)
Analog Inputs: RCA stereo
Analog Outputs: RCA stereo
Power Requirements: 120V AC, 60Hz
Dimensions: Standard component width (430mm)

Controls and Settings

Front Panel: POWER, EJECT, RECORD, STOP, PLAY, PAUSE, display window, recording level controls.

Remote Control: POWER, numeric buttons, TRANSPORT controls, INPUT SELECT, REC MODE, EDIT functions, DISPLAY.

Recording Settings: Input selection (digital/analog), recording level (manual/auto), sync recording, sampling rate conversion. Playback Settings: Repeat, random, program play. Edit Functions: Track divide, combine, delete, finalize.

Connecting Devices

Digital Sources: Optical/coaxial cables from CD players, DAT decks, MD recorders. Analog Sources: RCA cables from turntables, cassette decks, tuners.

Turn off all equipment before making connections.
Use high-quality cables for optimal signal transfer.
Match input selection to connected source type.
Ensure digital source sampling rates are compatible.

Tip: Use digital connections whenever possible for best audio quality.

Recording Operations

Supports real-time recording from various audio sources.

Insert blank disc: Press EJECT, load CD-R/RW.
Select input source: Choose digital or analog input.
Set recording level: Adjust using level meters (aim for -2dB peak).
Start recording: Press RECORD + PLAY simultaneously.
Monitor recording: Watch level meters and track counter.
Stop recording: Press STOP to end recording session.
Finalize disc: Use FINALIZE function to make CD playable elsewhere.
Eject disc: Press EJECT when finished.

WARNING! Do not interrupt power during recording or finalization.

Playback Features

Playback of recorded and commercial CDs with full transport control.

Normal play: Sequential track playback.
Program play: Create custom play sequences.
Random play: Shuffle track order.
Repeat: Single track or entire disc repeat.
Search: Fast forward/reverse within tracks.
Time display: Track time, remaining time, total time.

Care & Maintenance

Keep unit clean and dust-free. Use only recommended cleaning discs if needed.

CAUTION! Do not use chemical cleaners; unplug before cleaning. Store in dry environment.

Regulatory Information

FCC Part 15 Class B compliant. Conforms to CD-DA Red Book standards. Copyright protection systems: SCMS serial copy management system. For technical support, contact Marantz customer service or authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Cannot record	Disc type/write protection	Use CD-R (not CD-ROM); check disc write protection tab
No digital input signal	Connection/source settings	Check cable connections; verify source output settings
Poor recording quality	Level settings/media quality	Adjust recording levels; use high-quality media
Disc not recognized	Disc format/damage	Use proper CD-R/RW media; check for disc damage
Recording stops unexpectedly	Buffer underrun/disc quality	Use quality media; avoid source interruptions

Reset: Unplug unit for 30 seconds to reset system.

Service: Contact authorized Marantz service center for repairs.