Marantz SR4021 Stereo Receiver Manual

The Marantz SR4021 is a high-performance stereo receiver featuring 100 watts per channel, Dolby Digital and DTS decoding, multiple audio inputs, AM/FM tuner with 30 station presets, remote control, tone controls, speaker A/B switching, and headphone output. Designed for high-fidelity audio reproduction with Marantz's signature sound quality. 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. Tuner Operation 8. Audio Settings 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-power amplifier section, AM/FM tuner, multiple audio inputs, remote control, speaker terminals, headphone jack.

Feature	Description
Power Output	100 watts per channel (8 ohms, 20Hz-20kHz)
Audio Inputs	CD, DVD, VCR, Tape, Phono
Tuner	AM/FM with 30 station presets
Decoding	Dolby Digital, DTS
Speaker Outputs	A/B speaker switching
Headphone Jack	For private listening
Tone Controls	Bass and treble adjustment
Remote Control	Full-function remote included
Display	Fluorescent display with dimmer
Power Requirements	120V AC, 60Hz

Installation

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

Connect speakers: Use speaker wire to connect to A/B speaker terminals.
Connect audio sources: Use appropriate audio cables for CD, DVD, tape deck, etc.
Connect antenna: Attach FM antenna and AM loop antenna.
Plug into AC power outlet.

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

First-Time Setup

Power on receiver; initialize system settings.

Set speaker configuration: Choose A, B, or A+B speaker output.
Program tuner presets: Auto-scan and store favorite stations.
Adjust tone controls: Set bass and treble to preference.
Configure input sources: Assign appropriate inputs to source buttons.

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

Specifications

Power Output: 100W x 2 (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.08%
Frequency Response: 10Hz-50kHz
Signal-to-Noise Ratio: 98dB
Tuner Section: AM/FM with 30 presets
Inputs: CD, DVD, VCR, Tape, Phono
Outputs: Tape out, headphones, speakers A/B
Tone Controls: Bass ±10dB, Treble ±10dB
Power Consumption: 280W
Dimensions: 17-3/8" W x 6" H x 15-3/8" D

Controls and Settings

Front Panel: POWER, VOLUME, INPUT SELECTOR, TONE CONTROLS, SPEAKER A/B, HEADPHONE JACK.

Remote: POWER, INPUT SELECTION, VOLUME, MUTE, TUNER PRESETS, TONE CONTROLS.

Audio Settings: Bass control, treble control, balance, loudness compensation. Tuner Settings: Manual/Auto tuning, preset memory, stereo/mono selection. System Settings: Display dimmer, speaker configuration.

Connecting Devices

Audio Sources: CD player, DVD player, tape deck, turntable (phono). Speakers: Main speakers A/B.

Turn off receiver before connecting devices.
Use quality audio cables for best performance.
Connect turntable to PHONO input only.
Ensure proper speaker polarity (+/-).

Tip: Use shielded cables for phono input to reduce noise interference.

Tuner Operation

AM/FM tuner with 30 station presets.

Select tuner input: Press TUNER on front panel or remote.
Tune stations: Use manual tuning or auto-scan.
Store presets: Tune to desired station, press and hold preset button.
Recall presets: Press numbered preset buttons.
Stereo/Mono: Select stereo for FM, mono for weak signals.

Note: For best FM reception, extend and position FM antenna properly.

Audio Settings

Tone Controls: Adjust bass and treble to suit listening preferences and room acoustics. Balance: Adjust left/right channel balance. Loudness: Compensates for low-volume listening by boosting bass and treble.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior. Keep away from moisture and heat sources.

CAUTION! Do not use liquid cleaners or aerosols. Ensure proper ventilation during operation.

Regulatory Information

FCC compliant. This device complies with Part 15 of FCC rules. Marantz is a registered trademark. Manufactured under license from Dolby Laboratories. For support, visit www.marantz.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Speaker connections/volume	Check speaker wires; ensure volume not muted; verify input selection.
Distorted sound	Overload/clipping	Reduce volume; check source material; verify speaker impedance.
Poor FM reception	Antenna placement	Reposition FM antenna; ensure proper connection.
Remote not working	Batteries/obstructions	Replace batteries; ensure line of sight to IR sensor.
Overheating	Ventilation blocked	Ensure adequate ventilation; clear obstructions around unit.

Reset: Disconnect power for 5 minutes to reset microprocessor.

Service: Contact authorized Marantz service center for repairs.