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Harman Kardon HK3450 User Manual

Harman Kardon HK3450
44 pages
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Harman Kardon HK3450 Specifications

General IconGeneral
Frequency Response20Hz to 20kHz
Total Harmonic Distortion0.09%
Input Sensitivity2.5mV (MM), 150mV (line)
Tuning rangeFM, MW
Tone ControlsBass, Treble
Loudness ControlYes
Inputsphono, CD, tape
Outputstape
Signal-to-Noise Ratio80dB (MM)

Summary

Specifications

FM Section Specifications

Detailed specifications for the FM radio receiver section.

AM Section Specifications

Detailed specifications for the AM radio receiver section.

Audio Section Specifications

Detailed specifications for the audio amplifier section.

Leakage Test and Safety Checks

Disassembly Procedures

Cabinet Top Removal

Procedure to remove the main cabinet top cover.

Front Panel Assembly Removal

Procedure to remove the front panel assembly.

PC Board Removal Procedures

Steps to remove various PC boards from the unit.

Circuit Description

FM Tuner Circuit Explanation

Description of the FM signal path and processing.

AM Tuner Circuit Explanation

Description of the AM signal path and processing.

Audio Amplifier Circuit Explanation

Description of the audio signal amplification and protection.

Muting and Synthesizer Circuits

Explanation of muting and frequency synthesizer circuit functions.

Block Diagrams

Timing Charts

Alignment Procedures

AM Alignment Steps

Specific adjustment steps for the AM tuner section.

FM Alignment Steps

Specific adjustment steps for the FM tuner section.

Power Amplifier Alignment

DC Balance Adjustment

Procedure to adjust DC balance in the power amplifier.

Idling Current Adjustment

Procedure to adjust idling current in the power amplifier.

General Unit Parts List

General Unit Exploded View

Printed Circuit Board Layouts

Tuner PC Board Layout (PCB 1)

Component placement diagram for the Tuner PC Board.

Main Amplifier PC Board Layout (PCB 101)

Component layout for the Main Amplifier PC Board.

Front PC Board Layout (PCB 102)

Component layout for the Front PC Board.

EQ PC Board Layout (PCB 8)

Component layout for the EQ PC Board.

Speaker Switch PC Board Layout (PCB 103)

Component layout for Speaker Switch PC Board.

Electrical Parts List

Tuner PC Board Parts

List of capacitors and resistors for the Tuner PC Board.

IC Block Diagrams

Volume Motor Driver IC (LB1639)

Block diagram for the volume motor driver IC.

FM/AM IF Amp IC (LA1266)

Block diagram for the FM/AM IF amplifier IC.

PLL Synthesizer IC (LM7000)

Block diagram for the PLL synthesizer IC.

Micro Computer IC Block Diagram

IC Terminal Functions

Micro Computer IC (M37421M6-351FP) Terminals

Pin-out and function details for the microcomputer IC.

Schematic Diagrams

EQ Section Schematic

Circuit diagram for the Equalizer section.

FM Tuner Pack Section Schematic

Circuit diagram for the FM tuner pack section.

Tuner Section Schematic

Power Supply Section Schematic

Power Amplifier Section Schematic

Wiring Diagram

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