marantz 2230 manual free download

The Marantz 2230 is a classic stereo receiver from the 1970s known for its warm sound quality and distinctive blue-lit tuning dial. This 30-watt per channel receiver features AM/FM tuner, phono input for turntables, tape monitor, loudness control, and tone adjustments. Below are key sections covering features, specifications, operation, maintenance, and troubleshooting for this vintage audio component.

1. Features at a Glance 2. Installation & Setup 3. Specifications 4. Controls and Functions 5. Connecting Components 6. Operation Guide 7. Maintenance & Care 8. Troubleshooting 9. Service Information

Features at a Glance

Key components: Stereo receiver with tuner, amplifier, and preamp sections. Classic Marantz design with wood cabinet and blue lighting.

Feature	Description
Power Output	30 watts per channel (8 ohms)
Tuner Section	AM/FM stereo with tuning meter
Inputs	Phono, Aux, Tape 1, Tape 2
Outputs	Speaker A/B, Headphone, Tape Out
Controls	Volume, Balance, Bass, Treble, Loudness
Filters	High and low filters
Tuning Meter	Signal strength and center tuning indicators
Power Requirements	120V AC, 60Hz
Dimensions	17-1/2" W × 5" H × 14-1/2" D
Weight	Approximately 22 lbs

Installation & Setup

Proper installation ensures optimal performance and safety.

Placement: Choose well-ventilated area away from heat sources and moisture.
Speaker Connection: Connect speakers to A or B terminals observing proper polarity.
Source Connections: Connect turntable to PHONO inputs, other sources to AUX.
Antenna: Connect FM antenna to 300-ohm terminals, AM loop antenna to AM terminals.
Power: Plug into standard 120V AC outlet.

WARNING! Ensure proper ventilation to prevent overheating. Do not block ventilation slots.

Specifications

Power Output: 30 watts RMS per channel (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.3% at rated output
Frequency Response: 10Hz-50kHz (+0, -3dB)
Input Sensitivity: Phono: 2.0mV, Aux: 250mV
Signal-to-Noise Ratio: Phono: 70dB, Aux: 85dB
Tuning Range: FM: 88-108MHz, AM: 530-1600kHz
Capture Ratio: 2.0dB
Selectivity: 60dB
Image Rejection: 60dB
IF Rejection: 80dB

Controls and Functions

Front panel controls and their functions for optimal operation.

Front Panel: Power Switch, Volume, Balance, Bass, Treble, Loudness, Input Selector, Speaker Selector, Tuning Knob, Mode Switch (FM Stereo/Mono), Filter Switches.

Rear Panel: AC Outlet, Phono Ground, Antenna Terminals, Input/Output Jacks, Speaker Terminals.

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.

Connecting Components

Proper connection of audio components for optimal performance.

Turntable: Connect to PHONO inputs, attach ground wire to ground terminal.
CD Player/Tape Deck: Connect to AUX inputs using RCA cables.
Tape Decks: Use TAPE 1 and TAPE 2 inputs/outputs for recording.
Speakers: Connect to SPEAKER A/B terminals observing polarity.
Headphones: Plug into front panel headphone jack.

Tip: Always turn off power before making connections. Use quality cables for best performance.

Operation Guide

Basic operation procedures for daily use.

Power On: Turn power switch clockwise.
Source Selection: Rotate INPUT selector to desired source (Phono, Aux, Tape).
Volume Control: Adjust volume to comfortable listening level.
Tuning: Rotate tuning knob, use tuning meter for precise station alignment.
Tone Adjustment: Use Bass/Treble controls to suit listening preference.
Loudness: Engage for enhanced bass at low volume levels.
Speaker Selection: Choose SPEAKER A, B, or both for multiple speaker setups.

Note: Allow 15-30 minutes warm-up for optimal performance.

Maintenance & Care

Proper maintenance ensures longevity and performance.

Cleaning: Use soft, dry cloth for exterior. Wood cabinet may be treated with furniture polish.
Ventilation: Keep ventilation slots clear of obstructions.
Controls: Occasional use prevents oxidation. Deoxit recommended for noisy controls.
Storage: Cover when not in use to prevent dust accumulation.

CAUTION! Never use liquids or sprays directly on unit. Unplug before cleaning.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord, outlet, fuse	Check power cord connection; test outlet; check fuse
No sound	Speaker connections, volume	Verify speaker wires; check volume control; source selection
Distorted sound	Overload, faulty tubes	Reduce volume; check source components; service required
Poor FM reception	Antenna, location	Check antenna connections; reposition antenna; use external antenna
Hum or noise	Grounding, cables	Ensure phono ground connected; check cable quality; use filters
One channel dead	Balance control, connections	Check balance setting; verify all connections; service may be needed

Service Information

The Marantz 2230 is a vintage component that may require specialized service. For technical support or service:

Consult qualified vintage audio technician
Original schematics available from Marantz archives
Replacement parts may require sourcing from specialty suppliers
Capacitor replacement recommended for units over 20 years old

Note: This manual is provided for reference purposes. Marantz is a registered trademark.