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Marantz 2245 Service Manual

Marantz 2245
33 pages
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SERVICE
MANUAL
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Marantz 2245 Specifications

General IconGeneral
Power Output45 watts per channel into 8Ω (stereo)
Total Harmonic Distortion0.3%
Damping Factor45
Input Sensitivity1.8mV (MM), 180mV (line)
Output45 watts per channel
TypeStereo Receiver
Year1971
Tuning RangeFM, MW
Speaker Load Impedance4 to 16Ω
Semiconductors3 x IC

Summary

Specifications

Audio Circuits

Details electrical specifications for the audio amplification stages.

FM Sections

Lists technical specifications for the FM tuning and reception circuits.

General Specifications

Covers power requirements, dimensions, and weight of the receiver.

Introduction

AM Tuner Operation

Detailed description of the AM tuner section's signal path and components.

FM Tuner Operation

FM Tuner Signal Path

Explanation of FM tuner signal path, including FET amplifier, mixer, and IF stages.

FM Tuner Troubleshooting

Power Amplifier

Power Protection Circuit

Speaker Protector Relay Circuit

Power Amplifier Troubleshooting

Excessive Line Consumption

Checks for shorted rectifiers, transistors, and open circuits to resolve excessive power draw.

AM Alignment Procedures

FM Alignment Procedures

Audio Adjustments

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