Marantz 2230 User Manual

The Marantz 2230 is a classic stereo receiver from the 1970s featuring 30 watts per channel, built-in AM/FM tuner, phono input for turntables, tape monitor circuits, loudness control, and distinctive blue backlit analog tuning meter. This manual covers operation, connections, specifications, and maintenance for optimal performance of this vintage audio component.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Components 7. Tuner Operation 8. Phono Operation 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Stereo amplifier, AM/FM tuner, Front panel controls, Input/output jacks, Wooden cabinet.

Feature	Description
Power Output	30 watts per channel (8 ohms)
Tuner Section	AM/FM stereo with analog tuning meter
Phono Input	For magnetic cartridge turntables
Tape Monitor	Dual tape monitor circuits
Loudness Control	Compensates for low-volume listening
Tone Controls	Bass and treble adjustment
Input Selector	Phono, Aux, Tape 1, Tape 2
Speaker Selector	A/B speaker switching
Headphone Jack	Front panel 1/4" headphone output
Power Switch	Main power on/off with indicator light

Installation

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

Connect speakers: Use speaker terminals for A and B speaker pairs.
Connect turntable: Use PHONO input for magnetic cartridge turntables.
Connect auxiliary sources: Use AUX input for CD players, tape decks, etc.
Connect antenna: FM antenna to 300 ohm terminals, AM antenna to AM terminals.
Plug into AC power outlet.

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

First-Time Setup

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

Set input selector: Rotate to desired source (Phono, Aux, Tape).
Adjust volume: Start at minimum, gradually increase to desired level.
Tune FM stations: Use tuning knob and meter for precise station selection.
Set tone controls: Adjust bass and treble to personal preference.
Engage loudness: Use for enhanced low-frequency response at low volumes.

CAUTION! Always turn volume to minimum before powering on or changing sources.

Specifications

Power Output: 30 watts per channel (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.3% at rated power
Frequency Response: 10Hz-50kHz (+1, -3dB)
Input Sensitivity: Phono: 2.5mV, Aux: 250mV
Signal-to-Noise Ratio: Phono: 70dB, Aux: 85dB
Tuner Section: FM stereo, AM broadcast
Dimensions: 17-1/4" W × 5" H × 14-1/2" D
Weight: 22 lbs
Power Requirements: 120V AC, 60Hz, 180W

Controls and Settings

Front Panel: Power switch, Input selector, Volume, Balance, Bass, Treble, Loudness, Speaker selector, Tuning knob, Function switch.

Rear Panel: Speaker terminals, Input jacks, Antenna terminals, AC power cord, Fuse holder.

Input Selection: PHONO (turntable), AUX (CD player, etc.), TAPE 1, TAPE 2. Tone Controls: Bass (±10dB at 50Hz), Treble (±10dB at 15kHz). Speaker Selection: A, B, A+B, Off. Function Switch: FM stereo, FM mono, AM, Phono, Aux.

Connecting Components

Speakers: Use A/B terminals. Turntable: PHONO input (ground wire to chassis). Auxiliary: AUX input. Tape decks: TAPE IN/OUT jacks.

Turn off power before making connections.
Match cable colors (red/white for right/left channels).
Ensure secure connections to prevent hum and noise.
Connect turntable ground wire to reduce hum.

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

Tuner Operation

FM/AM reception with analog tuning meter.

Set function switch to FM or AM.
Rotate tuning knob until station is centered on meter.
For FM stereo, ensure stereo indicator is lit.
Use tuning meter for precise station selection.
Adjust antenna for best reception.

Note: FM stereo operation requires adequate signal strength for noise-free reception.

Phono Operation

Designed for magnetic cartridge turntables.

Set input selector to PHONO.
Connect turntable to PHONO input jacks.
Connect turntable ground wire to chassis ground.
Start turntable, then adjust volume.
Use tone controls to adjust sound characteristics.

WARNING! Do not connect ceramic cartridge turntables to PHONO input.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior. Clean controls with contact cleaner if noisy.

CAUTION! Do not use liquids on wood cabinet. Keep away from moisture and extreme temperatures.

Regulatory Information

FCC compliant for home audio equipment. Manufactured by Marantz Company, Inc. For service, contact authorized Marantz service centers. This product should be serviced by qualified technicians only.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Speaker connections/power	Check speaker wires; ensure power is on; verify input selection.
Hum in phono	Ground connection	Connect turntable ground wire to chassis.
Poor FM reception	Antenna alignment	Adjust FM antenna for best signal; ensure proper connection.
Distorted sound	Overload/connections	Reduce volume; check source component connections.
One channel silent	Balance control/cables	Check balance control; verify cable connections.

Service: Contact authorized Marantz service center for internal repairs.