Marantz 2100 Tuner Manual

The Marantz 2100 is a high-performance stereo FM/AM tuner featuring quartz PLL synthesized tuning, digital frequency display, 12-station memory presets, auto/manual tuning modes, signal strength meter, multipath indicator, and advanced stereo decoding. Designed for audiophile-grade reception with excellent sensitivity and selectivity. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to Audio System 7. Tuning and Reception 8. Memory Presets 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Quartz PLL synthesized tuner, digital LED display, FM/AM tuning, 12 preset memory stations, remote control capability, signal strength indicator.

Feature	Description
FM Tuner Section	87.5-108 MHz coverage with high sensitivity
AM Tuner Section	530-1710 kHz coverage
Quartz PLL Tuning	Precise frequency control and stability
Digital Display	LED frequency readout with signal strength
Memory Presets	12 stations (6 FM, 6 AM)
Tuning Modes	Auto scan and manual tuning
Stereo/Mono Switch	For weak signal areas
Output Level Control	Adjustable audio output
AC Power Input	120V AC, 60Hz operation
Antenna Terminals	300 ohm balanced and 75 ohm unbalanced

Installation

Unpack and inspect contents. Place on stable, level surface away from heat sources.

Connect antennas: FM 300 ohm terminals for dipole; 75 ohm for coaxial. AM loop antenna included.
Connect to amplifier: Use RCA audio cables to amplifier AUX or TUNER inputs.
Connect AC power: Use included power cord to wall outlet.
Position antennas: FM antenna should be vertical; AM loop oriented for best reception.

WARNING! Ensure proper ventilation; do not block ventilation openings. Use stable surface to prevent tipping.

First-Time Setup

Power on tuner; initialize system settings.

Select band: Press FM/AM button to choose desired band.
Auto tuning: Press AUTO TUNE to scan for stations automatically.
Manual tuning: Use TUNING buttons for precise frequency selection.
Set memory presets: Tune to station, press MEMORY, then preset number (1-12).
Adjust output level: Set OUTPUT LEVEL control for proper volume matching.

CAUTION! Allow warm-up time for optimal performance. Keep away from electrical interference sources.

Specifications

FM Frequency Range: 87.5-108 MHz
AM Frequency Range: 530-1710 kHz
FM Sensitivity: 1.8 μV (IHF)
AM Sensitivity: 30 μV
Signal-to-Noise Ratio: 70 dB (FM stereo)
Capture Ratio: 1.5 dB
Selectivity: 70 dB
Image Rejection: 70 dB
Output Level: 750 mV
Power Requirements: 120V AC, 60Hz, 15W
Dimensions: 17" W × 4.5" H × 12" D
Weight: 12 lbs

Controls and Settings

Front Panel: POWER, FM/AM SELECT, TUNING buttons, MEMORY, PRESET buttons (1-12), STEREO/MONO, OUTPUT LEVEL.

Display Indicators: Frequency readout, STEREO indicator, signal strength meter, memory recall indicator.

Tuning: AUTO TUNE for automatic station seeking; manual TUNING for precise control. Memory: Store 12 stations (6 FM, 6 AM). Audio: STEREO/MONO switch for weak signals; OUTPUT LEVEL for volume matching to amplifier.

Connecting to Audio System

Audio Output: Standard RCA jacks for left/right channels.

Turn off all equipment before connecting.
Connect audio cables from TUNER OUTPUT to amplifier AUX or TUNER inputs.
Connect antennas: FM dipole to 300 ohm terminals; AM loop to AM terminals.
Connect AC power cord to wall outlet.
Turn on amplifier and select TUNER input.

Tip: Use high-quality shielded audio cables for best performance. Keep antenna cables away from power cords.

Tuning and Reception

Advanced quartz PLL tuning for stable reception.

Select band: Press FM/AM for desired band.
Auto tuning: Press AUTO TUNE - tuner scans and stops at next strong station.
Manual tuning: Press TUNING up/down for precise frequency adjustment.
Signal strength: Monitor meter for best reception quality.
Stereo/mono: Use STEREO/MONO switch - mono for weak signals reduces noise.
Fine tuning: Use manual mode for critical adjustment in crowded areas.

WARNING! Do not touch antenna connections while powered on. Ensure proper grounding.

Memory Presets

Store up to 12 favorite stations (6 FM, 6 AM).

Tune to desired station using auto or manual tuning.
Press MEMORY button - MEMORY indicator lights.
Within 5 seconds, press desired preset number (1-12).
Memory stored - indicator turns off.
Recall: Simply press preset number to tune to stored station.
Overwrite: Repeat process for same preset number.

Note: Memory is maintained during power-off. Presets are organized as 1-6 for FM, 7-12 for AM.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth only; no liquids or chemical cleaners.

Antenna maintenance: Check connections periodically. Keep antennas clean and properly positioned.

CAUTION! Do not use abrasive cleaners. Avoid exposure to moisture and extreme temperatures. Service by qualified personnel only.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Manufactured to meet industry standards for audio equipment. For technical support and service, contact authorized Marantz service centers. This device complies with part 15 of the FCC Rules.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord/outlet	Check power connection; verify outlet function; check fuse.
Poor FM reception	Antenna/position	Reposition FM antenna; check connections; use external antenna.
No AM reception	AM loop antenna	Ensure AM loop connected; rotate for best signal; check location.
Distorted audio	Signal strength/output level	Adjust antenna; reduce OUTPUT LEVEL; switch to mono for weak signals.
Memory lost	Power interruption	Memory requires continuous power; reprogram stations after extended outage.
No stereo	Signal strength	Improve antenna; STEREO indicator shows when stereo signal received.

Reset: Disconnect power for 30 seconds to reset microprocessor.

Service: Contact authorized Marantz service center for internal repairs.