Marantz 4270 User Manual

aah sh als Bb ok Dy 4
nitelel=) Me: A)
Sora Le Dadialil ¢ Secs

Marantz 4270 Specifications

General

Total Harmonic Distortion	0.3%
Tuning Range	FM, MW
Damping Factor	50
Input Sensitivity	1.8mV (MM), 180mV (line)
Power Output	70 watts per channel into 8Ω (stereo)
Signal to Noise Ratio	75 dB (MM), 90 dB (line)
Speaker Load Impedance	4 to 16 ohms
Semiconductors	Diodes: 48

Summary

Marantz 4270 AM Tuner Section

Marantz 4270 FM Tuner Section

FM Tuner Audio Muting and Stereo Mode Auto-Selecting Circuit

FM Tuner MPX Stereo Decoding Circuit

Marantz 4270 Phono and Pre-Amplifier

Marantz 4270 Dolby Unit

Marantz 4270 Power Amplifier

Marantz 4270 Audio Trouble Analysis

Marantz 4270 AM Alignment Procedure

AM Alignment Frequency Range and Tracking

Procedure for aligning AM frequency range and tracking.

AM Alignment Signal Strength Meter

Procedure for aligning the AM signal strength meter.

Marantz 4270 FM Alignment Procedure

FM Alignment Stereo Separation

Procedure for aligning stereo separation in the FM tuner.

FM Alignment Muting Circuit

Procedure for aligning the FM muting circuit.

Marantz 4270 Dolby Alignment Procedure

Dolby FM Preset Level Controls Alignment

Steps for adjusting Dolby FM preset level controls.

Marantz 4270 Technical Specifications

FM Section Specifications

FM performance parameters including sensitivity, selectivity, and distortion.

AM Section Specifications

AM performance parameters including sensitivity, selectivity, and distortion.

Audio Section Specifications

General Specifications