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Harman Kardon AVR 4550 Service Manual

Harman Kardon AVR 4550
16 pages
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AVR 4550 Audio/VideoReceiver
SERVICE MANUAL
AVR 4550
ready
LOGIC 7
VMAx
Power for the Digital Revolution
®

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Harman Kardon AVR 4550 Specifications

General IconGeneral
TypeAV Receiver
Input Impedance47 kΩ
Surround SoundDolby Digital, DTS
Input Sensitivity200 mV
BluetoothNo
Wi-FiNo
Frequency Response20Hz to 20kHz
Signal to Noise Ratio100 dB
InputsHDMI, Optical, Coaxial
OutputsHDMI, Subwoofer
Supported Audio FormatsDolby Digital, DTS

Summary

AVR325/525 Alignment Specifications

Main Board Bias Adjustment

Procedure for setting bias on the main board for front and surround channels.

Back Surround Board Bias Adjustment

Back Surround Board Bias Adjustment Procedure

Details the bias adjustment steps for SBL, Center, and SBR channels on the back surround board.

AVR325/525 Wiring Diagram

Board Interconnection Reference Assignments

Reference numbers and assignments for various circuit boards connected in the AVR.

AVR R525/325 Block Diagram

Audio Signal Processing Blocks

Overview of audio signal paths including DAC, DSP, and amplifier sections.

Video Signal Processing Blocks

Overview of video signal paths including input, processing, and output.

Power Supply and Control Blocks

Diagram of power supply distribution, regulation, and control signals.

Front Board Schematic Diagram

DSP Board Schematic Diagram

Main Amplifier Schematic Diagram

Center SB Amp Schematic Diagram

Supply Schematic Diagram

System Schematic Diagram

Video Board Schematic Diagram

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