Marantz 2230 Receiver Manual

The Marantz 2230 is a classic stereo receiver from the 1970s featuring 30 watts per channel, high-quality analog components, FM/AM tuner, phono input for turntables, auxiliary inputs, tape monitor, loudness control, and distinctive blue-lit tuning dial. Below are key sections for features, installation, operation, specifications, and maintenance.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Components 7. Tuner Operation 8. Maintenance & Care 9. Technical Information 10. Troubleshooting

Features at a Glance

Key components: Analog tuner section, phono preamp, tone controls, speaker outputs, headphone jack.

Feature	Description
Power Output	30 watts per channel RMS into 8 ohms
Tuner Section	FM stereo and AM reception
Phono Input	MM cartridge compatible
Auxiliary Input	For tape decks, CD players
Tape Monitor	Tape input/output with monitoring
Loudness Control	Compensates for low-volume listening
Tone Controls	Bass and treble adjustment
Headphone Jack	For private listening
Speaker Selector	A/B speaker switching
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 terminals, observing polarity.
Connect turntable: Use phono input for magnetic cartridges.
Connect auxiliary sources: Use AUX input for CD players, tape decks.
Connect antenna: FM 300-ohm terminals for best reception.
Plug into AC power outlet.

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

First-Time Setup

Power on receiver; allow warm-up for optimal performance.

Select input source: Turn selector knob to PHONO, AUX, or TUNER.
Adjust volume: Start at minimum, gradually increase to desired level.
Tune FM stations: Use tuning dial for best signal strength.
Set tone controls: Adjust bass and treble to preference.
Engage loudness: Switch on for enhanced low-volume listening.

CAUTION! Avoid turning volume to maximum to prevent speaker damage.

Specifications

Power Output: 30 watts per channel (RMS, 8 ohms)
Frequency Response: 20Hz-20kHz ±1dB
Total Harmonic Distortion: 0.3% at rated power
Input Sensitivity: Phono: 2.5mV, AUX: 250mV
Signal-to-Noise Ratio: Phono: 70dB, AUX: 85dB
Tuner Section: FM stereo, AM reception
Inputs: Phono, AUX, Tape
Outputs: Speaker A/B, headphone, tape record
Power Requirements: 120V AC, 60Hz
Dimensions: 17-1/2" W × 5" H × 14" D

Controls and Settings

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

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

Input Selection: PHONO for turntables, AUX for other sources, TUNER for radio. Tone Controls: Bass ±10dB at 100Hz, Treble ±10dB at 10kHz. Loudness: Compensates for Fletcher-Munson curves. Balance: Adjusts left/right channel balance.

Connecting Components

Speaker connections: Use 16-gauge or larger wire, observe polarity. Source connections: RCA cables for phono, aux, tape.

Turn off power before making connections.
Connect turntable ground wire to ground terminal.
Use high-quality interconnects for best performance.
Ensure secure connections to prevent hum and noise.

Tip: Keep signal cables away from power cords to reduce interference.

Tuner Operation

FM/AM tuning with signal strength meter.

Select TUNER input on front panel.
Adjust tuning dial for desired station.
Monitor signal strength meter for optimal reception.
Use FM muting to reduce inter-station noise.
For stereo FM, stereo indicator will illuminate.

WARNING! Use proper FM antenna for best reception quality.

Maintenance & Care

Regular cleaning: Use soft, dry cloth for exterior. Control cleaning: Use contact cleaner for noisy controls.

CAUTION! Unplug before cleaning. Do not use liquids or aerosols near controls.

Technical Information

Marantz 2230 incorporates high-quality transformers, capacitors, and discrete components. Circuit design emphasizes low distortion and wide frequency response. Built to Marantz quality standards with wood cabinet option available.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Speaker connections/power	Check speaker wires; ensure power is on; verify input selection.
Hum or noise	Grounding/cables	Check turntable ground; ensure secure cable connections.
Poor FM reception	Antenna/placement	Improve antenna positioning; check antenna connections.
Distorted sound	Overload/speakers	Reduce volume; check speaker impedance compatibility.
Scratchy controls	Dirt in controls	Use contact cleaner on potentiometers.

Service: Consult qualified technician for internal repairs.

Support: Contact authorized Marantz service centers.