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Harman Kardon HK 680 User Manual

Harman Kardon HK 680
38 pages
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Harman Kardon HK 680 Specifications

General IconGeneral
Power Output85W per channel into 8Ω (stereo)
Frequency Response10Hz to 100kHz
Total Harmonic Distortion0.09%
Input Sensitivity2.5mV (MM), 150mV (line)
Signal to Noise Ratio95dB (line)
Input Impedance47kΩ (line)

Summary

Harman Kardon HK680 Integrated Amplifier

Specifications

Power Cord Replacement

Disassembly Procedures

Cabinet Top Removal

Procedure for removing the amplifier's top cabinet cover.

Front Panel Ass'y Removal

Steps to detach the front panel assembly from the unit.

Main Amp. P.C. Board Removal

Detailed steps for removing the main amplifier printed circuit board.

Input Selector P.C. Board Removal

Procedure for removing the input selector printed circuit board.

Volume P.C. Board Removal

Steps for detaching the volume control printed circuit board.

Tone Control P.C. Board Removal

Procedure to remove the tone control printed circuit board.

Power Supply P.C. Board Removal

Steps for removing the power supply printed circuit board.

Control P.C. Board Removal

Procedure for removing the control printed circuit board.

Controls and Functions

Alignment Procedures

DC Balance Adjustment

Procedure for adjusting DC balance at speaker outputs.

Idling Current Adjustment

Procedure for adjusting the idling current of the amplifier.

Block Diagram

General Unit Parts List

General Unit Exploded View

IC Block Diagram

IC Terminal Function

Electrical Parts List

Wiring Diagram

PH600 Phono P.C. Board Option

How to Install

Instructions for installing the optional PH600 phono board.

Schematic Diagram

Infrared Remote Control Schematic Diagram

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