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Harman Kardon HK3550 User Manual

Harman Kardon HK3550
44 pages
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Harman Kardon HK3550 Specifications

General IconGeneral
Tuning rangeFM, MW
Total Harmonic Distortion0.09%
Input Sensitivity2.5mV (MM), 150mV (line)
Speaker Load Impedance8Ω (minimum)
Power Output50 watts per channel into 8Ω (stereo)
Frequency Response10Hz to 100kHz

Summary

Specifications

FM Section Specifications

Detailed specifications for the FM tuner section, including sensitivity, selectivity, and distortion.

AM Section Specifications

Detailed specifications for the AM tuner section, including sensitivity and signal-to-noise ratio.

Audio Section Specifications

Detailed specifications for the audio amplifier section, including sensitivity and power output.

Leakage Test Procedure

Disassembly Procedures

Circuit Description

FM Tuner Section

Explanation of the FM signal path, amplification, and conversion to intermediate frequency.

AM Tuner Section

Explanation of the AM signal path, amplification, and detection.

Audio Amplifier Section

Description of audio signal processing, pre-amplification, and power amplification.

Muting Circuit

Description of the circuit that mutes audio output under weak signal or tuning conditions.

Synthesizer Section

Explanation of the PLL synthesizer's role in frequency control.

Indicator Section

Explanation of how the frequency display and tuning indicators are controlled.

Block Diagram

Timing Chart

Alignment Procedures

AM Adjustment

Steps for adjusting AM signal generator, IF, and tracking for optimal output.

FM Adjustment

Steps for aligning FM discriminator, muting level, and stereo separation.

Power Amp Alignment Procedures

DC Balance Adjustment

Procedure to adjust DC balance in the power amplifier section.

Idling Current Adjustment

Procedure to adjust idling current in the power amplifier section.

General Unit Parts List

General Unit Exploded View

P.C. Boards

Electrical Parts List

IC Block Diagrams

IC Terminal Function

Schematic Diagram (Infrared Remote Control)

Schematic Diagram (EQ Section)

Schematic Diagram (FM Tuner Section)

Schematic Diagram (Tuner Section)

Schematic Diagram (Power Amp Section)

Schematic Diagram (Function Section)

Schematic Diagram (Power Supply Section)

Wiring Diagram

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