marantz 2230 manual pdf

The Marantz 2230 is a classic stereo receiver from the 1970s featuring 30 watts per channel, high-quality analog tuning, and the distinctive Marantz blue dial display. This vintage audio component is renowned for its warm sound characteristics, robust construction, and timeless design. Below are key sections covering specifications, operation, connections, maintenance, and troubleshooting for this iconic audio receiver.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operation Guide 8. Maintenance 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Stereo receiver with tuner, amplifier, and preamplifier sections, walnut wood case, front panel controls, rear connection panel.

Feature	Description
Power Output	30 watts per channel RMS at 8 ohms
Tuner Section	AM/FM stereo with analog tuning
Inputs	Phono, Aux, Tape Monitor
Outputs	Speaker A/B, Tape Out, Headphone
Tone Controls	Bass, Treble, Loudness contour
Display	Blue fluorescent tuning meter
Filter Controls	High and low filters
Speaker Selector	A/B speaker selection
Power Switch	Main power on/off with indicator light
Volume Control	Analog potentiometer with smooth action

Installation

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

Connect speakers: Use speaker wire to connect to Speaker A or B terminals.
Connect audio sources: Turntable to Phono input, other sources to Aux input.
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 ventilation openings. Use correct speaker impedance (8 ohms recommended).

First-Time Setup

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

Speaker connection: Connect speakers to Speaker A terminals.
Source selection: Rotate INPUT selector to desired source (Phono, Aux).
Volume adjustment: Start with volume at minimum, gradually increase.
Tuning: Select FM or AM band, tune to desired station.

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

Specifications

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

Controls and Settings

Front panel controls: Power, Volume, Bass, Treble, Balance, Input Selector, Speaker Selector, Tuner Band Selector.

Additional Controls: Loudness switch, High/Low filters, Mono/Stereo switch, Tuning knob, Signal meter.

Tone Controls: Bass ±10dB at 50Hz, Treble ±10dB at 10kHz. Loudness: Compensates for low-volume listening. Filters: High filter reduces hiss, Low filter reduces rumble. Balance: Adjusts left/right channel balance.

Connecting Devices

Speaker connections: Use Speaker A/B terminals. Source connections: Phono for turntable, Aux for CD player/tuner, Tape for recording devices.

Turn off receiver before making connections.
Match impedance: Use 8 ohm speakers for optimal performance.
Phono connection: Use ground wire from turntable to ground terminal.
Antenna: Connect FM dipole antenna for best reception.

Tip: Use high-quality cables and ensure secure connections for best performance.

Operation Guide

Basic operation procedures for daily use.

Power on: Switch power button; wait for tubes to warm up (if applicable).
Source selection: Rotate INPUT selector to desired source.
Volume control: Adjust volume gradually to desired level.
Tuning: Select FM/AM band, tune using tuning knob for peak meter reading.
Tone adjustment: Use Bass/Treble controls to suit listening preferences.
Speaker selection: Choose Speaker A, B, or both for multiple speaker setups.

WARNING! Do not operate with cover removed. Avoid excessive volume levels.

Maintenance

Regular maintenance ensures optimal performance and longevity.

Cleaning: Use soft, dry cloth for exterior. Controls: Use contact cleaner for scratchy controls. Ventilation: Keep vents clear of dust. Storage: Keep in dry environment away from extreme temperatures.

CAUTION! Unplug unit before cleaning. Do not use liquid cleaners. Professional service recommended for internal maintenance.

Regulatory Information

FCC compliance: Meets applicable standards for home audio equipment. Manufactured to Marantz quality standards. This product may be covered by patents in multiple countries. For technical support or service information, contact authorized Marantz service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Speaker connections/power	Check speaker wires; ensure power is on; verify input selection.
Distorted sound	Overload/incorrect settings	Reduce volume; check source level; verify speaker impedance.
Poor FM reception	Antenna/placement	Reposition FM antenna; check antenna connections.
Hum or noise	Grounding/cables	Check phono ground connection; use shielded cables.
Scratchy controls	Dust/wear	Use contact cleaner; rotate controls several times.

Service: Contact authorized Marantz service center for internal repairs.

Note: This vintage equipment may require specialized service by technicians familiar with analog audio components.