marantz 2230 b manual

The Marantz 2230 B is a classic stereo receiver featuring 30 watts per channel, built-in AM/FM tuner, phono input for turntables, tape monitor, loudness control, and tone adjustments. This vintage audio component delivers warm, rich sound quality with the distinctive Marantz blue dial display. Below are key sections for features, installation, operation, specifications, and maintenance.

1. Features at a Glance 2. Installation 3. Operation 4. Specifications 5. Controls and Settings 6. Connecting Components 7. Tuner Operation 8. Maintenance 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: 30W per channel amplifier, AM/FM stereo tuner, phono input, tape monitor, tone controls, speaker outputs.

Feature	Description
Power Output	30 watts per channel (8 ohms)
Tuner Section	AM/FM stereo with tuning meter
Phono Input	MM cartridge compatible
Tape Monitor	Dual tape inputs/outputs
Tone Controls	Bass and treble adjustments
Loudness Control	Compensates for low volume listening
Speaker Selector	A/B speaker outputs
Headphone Jack	Front panel 1/4" headphone output
Input Selector	Phono, Aux, Tape 1, Tape 2
Power Switch	Main power on/off

Installation

Unpack and inspect contents. Place on stable, well-ventilated surface.

Connect speakers: Use speaker wire to connect to A or B speaker terminals.
Connect turntable: Use phono input for turntable connection.
Connect audio sources: Use Aux input for CD player, tape inputs for tape decks.
Connect antenna: Attach FM antenna to antenna terminals.
Plug into AC power outlet.

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

Operation

Power on receiver; select input source.

Select input: Turn selector to Phono, Aux, or Tape position.
Adjust volume: Start with low volume and increase gradually.
Tone adjustments: Use bass and treble controls to suit listening preference.
Loudness control: Engage for enhanced bass at low volume levels.
Tuner operation: Select FM or AM band and tune to desired station.

CAUTION! Avoid excessive volume levels to prevent speaker damage.

Specifications

Power Output: 30 watts per channel (8 ohms)
Total Harmonic Distortion: 0.3% or less
Frequency Response: 20Hz - 20kHz
Input Sensitivity: Phono: 2.5mV, Aux: 250mV
Signal-to-Noise Ratio: Phono: 70dB, Aux: 85dB
Tuner Section: FM stereo, AM
Dimensions: 17" W × 5" H × 13" D
Weight: 22 lbs
Power Requirements: 120V AC, 60Hz

Controls and Settings

Front panel controls: Power switch, input selector, volume, balance, bass, treble, loudness, speaker selector.

Rear Panel: Speaker terminals, phono/aux/tape inputs, antenna terminals, AC power cord.

Input Selection: Phono, Aux, Tape 1, Tape 2. Tone Controls: Bass ±10dB, Treble ±10dB. Speaker Selection: A, B, A+B, Off. Balance Control: Adjusts left/right channel balance. Loudness: Compensates for Fletcher-Munson curve.

Connecting Components

Turntable: Phono input. CD Player: Aux input. Tape Deck: Tape inputs/outputs. Speakers: A/B terminals.

Turn off power before making connections.
Match cable types to appropriate inputs.
Ensure proper grounding for turntable.
Connect FM antenna for optimal reception.

Tip: Use high-quality cables for best audio performance.

Tuner Operation

AM/FM stereo tuning with signal strength meter.

Select FM or AM band.
Turn tuning knob to desired frequency.
Use tuning meter for precise station alignment.
For FM stereo, ensure stereo indicator is lit.
Use muting control to reduce inter-station noise.

WARNING! Proper antenna connection is essential for good reception.

Maintenance

Keep unit clean and dust-free. Use soft, dry cloth for cleaning.

CAUTION! Unplug before cleaning. Do not use liquid cleaners. Service by qualified technician only.

Regulatory Information

FCC compliant for home use. Manufactured to Marantz quality standards. For service or technical support, contact authorized Marantz service centers. This product may be covered by one or more U.S. patents.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Speaker connections/power	Check speaker wires; ensure power is on; verify input selection.
Distorted sound	Overload/connections	Reduce volume; check input levels; inspect cables.
Poor FM reception	Antenna	Check antenna connection; reposition antenna; use external antenna.
Hum or noise	Grounding/cables	Ensure proper grounding; check cable quality; separate from power cords.
One channel silent	Balance/connections	Check balance control; verify cable connections; test speakers.

Service: Contact authorized Marantz service center for internal repairs.