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Marantz 1200 User Manual

Marantz 1200
23 pages
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Marantz 1200 Specifications

General IconGeneral
Power Output100 watts per channel into 8Ω (stereo)
Speaker Load Impedance4Ω to 16Ω
Damping Factor60
OutputPre out
Signal to Noise Ratio90dB (line)

Summary

Introduction

Circuit Description

Pre-Amplifier

Describes the initial signal path and equalization.

Relay Board and Power Supply

Details power supply and output protection.

Tone Amplifier

Explains the tone control amplification stage.

Amplifier

Rectifier-Relay Board

Power Amplifier Board

Power Supply Board

Technical Specifications

Test Equipment Required for Servicing

220 and 100 Volt AC Conversion

Performance Verification Test Procedure

Preliminary Procedures

Setup and initial checks for testing.

Bias Adjustment Tests

Crucial adjustment for amplifier operation.

Balance Tests

Verifies left/right channel output balance.

Total Hum and Noise Test

Measures background noise levels.

Maximum Power Output

Tests the amplifier's output power capability.

Frequency Response

Evaluates amplifier's performance across frequencies.

Phono Preamplifier Distortion Test

Specific distortion test for phono input.

Functional Tests

Verifies operation of switches and controls.

Filters and Tone Controls

Tests the function of filters and tone adjustments.

Balance

Specific balance test on channel outputs.

Loudness

Tests the loudness contour circuit.

Channel Separation

Measures isolation between audio channels.

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