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Kenwood KR-7400 Service Manual

Kenwood KR-7400
36 pages
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KENWOOD
Hl/FI
STEREO
COMPONENTS
Service
Manual
KR-7400
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Kenwood KR-7400 Specifications

General IconGeneral
TypeStereo Receiver
Tuning RangeFM, MW
Power Output60 watts per channel into 8Ω (stereo)
Frequency Response20Hz to 20kHz
Total Harmonic Distortion0.1%
Damping Factor50
Signal to Noise Ratio70dB (MM), 90dB (line)
Speaker Load Impedance4Ω to 16Ω
Dimensions502 x 140 x 371mm
Weight15.2kg
Input Sensitivity2.5mV (MM), 150mV (line)

Summary

Block Diagram of AM-FM Stereo Receiver

Circuit Description

FM-RF (X01-1160-10) Circuit

Details the FM Radio Frequency stage, its components, and functionality.

FM-IF (X02-1050-11) Circuit

Explains the FM Intermediate Frequency circuit, filters, and detection stages.

Protection Circuit

Details the current limiter and DC drift protection mechanisms.

Adjustments

FM Section Adjustments

Provides alignment procedures for FM tuner stages like IFT and Discriminator.

AM Section Adjustments

Details alignment procedures for AM tuner stages such as IFT and RF.

Audio Section Adjustments

Covers bias adjustments for the audio amplifier stages.

PC Board Layouts

Troubleshooting Guide

Semiconductor Substitutions and Leads

Schematic Diagram

Specifications

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