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Marantz 2252B User Manual

Marantz 2252B
26 pages
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Marantz 2252B Specifications

General IconGeneral
Power Output52 watts per channel into 8Ω (stereo)
Total Harmonic Distortion0.1%
Tuning RangeFM, MW
Damping Factor45
Speaker Load Impedance4Ω to 16Ω
Signal to Noise Ratio90dB (line)
Dimensions440 x 365mm
Input Sensitivity180mV (line)
Semiconductors3 x IC

Summary

Connecting the Marantz Model 2252B

Phono Inputs

Explains the purpose and connection of phono jacks, including troubleshooting hum.

Tape Monitor Jacks

Details the function of IN and OUT jacks for connecting tape recorders.

FM Antenna Connections

Explains the use of the included ribbon antenna and connection methods.

Pre Out and Main In Jacks

Describes the PRE OUT and MAIN IN jacks for connecting external processors.

Speaker System Connections

Explains connecting two pairs of loudspeakers to the SPEAKER SYSTEM terminals.

Speaker Phasing Procedure

Provides a detailed test procedure to ensure proper speaker phasing for optimal sound.

Connection to AC Outlet

Instructs on plugging the unit into an AC outlet and cautions against DC outlets.

Signal Connections Checklist

Provides a checklist to ensure all signal connections are made correctly before operation.

Simplified Operating Procedures

Main Controls and Switches

Using Tape Recorders with Your Model 2252B

Service Notes

Repairs and Servicing

Advises on using qualified service technicians for repairs and calibration.

Technical Description

FM Front End

Details the FM antenna signal path, RF amplifier, and mixer stages.

FM IF Amplifier

Explains the FM IF amplifier system, including ICs, filters, and discriminator.

FM Stereo Demodulator

Describes the stereo composite signal processing using PLL technique.

Amplifier Section

Describes the amplifier section's direct-coupled, full complementary circuit.

Maintenance

Troubleshooting Difficulties

Offers hints for common operational problems and when to seek service.

Technical Specifications

Amplifier Section Specifications

Details power output, distortion, impedance, and frequency response for the amplifier.

Preamplifier Section Specifications

Lists specifications for phono and high-level inputs, noise, and output levels.

FM Tuner Section Specifications

Covers sensitivity, quieting, distortion, selectivity, and separation for FM reception.

AM Tuner Section Specifications

Details sensitivity, distortion, signal-to-noise ratio, and selectivity for AM reception.

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