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Harman Kardon HK640 User Manual

Harman Kardon HK640
34 pages
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Harman Kardon HK640 Specifications

General IconGeneral
TypeIntegrated Amplifier
Power Output40W per channel into 8Ω (stereo)
Input Sensitivity150mV (line)
Total Harmonic Distortion0.09% (at rated power)
Input Impedance47kΩ (MM), 20k Ohms (line)

Summary

Specifications

Disassembly Procedures

Controls and Functions

Alignment Procedures

DC Balance Confirmation

Procedure to confirm DC balance at speaker outputs.

Idling Current Adjustment

Procedure to adjust idling current using VR401 and VR402.

General Unit Exploded View

General Unit Parts List

P.C. Board Diagrams

PCB-5 CPU P.C. Board

Diagram of the CPU printed circuit board.

PCB-6 I/O P.C. Board

Diagram of the I/O printed circuit board.

PCB-4 SP Terminal P.C. Board

Diagram of the speaker terminal PCB.

PCB-7 Power Indicator P.C. Board

Diagram of the power indicator PCB.

PCB-9 Power Trans P.C. Board

Diagram of the power transistor PCB.

PCB-8 Volume Indicator P.C. Board

Diagram of the volume indicator PCB.

PCB-10 Volume P.C. Board

Diagram of the volume printed circuit board.

Electrical Parts List

Wiring Diagram

Schematic Diagram 1

Schematic Diagram 2

Schematic Diagram 3

PH600 Phono PCB Option

How to Install PH600 Option

Instructions for installing the PH600 option.

PH600 Option Parts List

List of parts for the PH600 phono option.

PH600 P.C. Board

PH600 Wiring Diagram

Wiring diagram for the PH600 option.

Schematic Diagram 4 (PH600)

PH600 Electrical Parts List

Schematic Diagram 5 (PH600)

Schematic Diagram 6 (PH600)

Schematic Diagram 7 (PH600)

Schematic Diagram 8

Schematic Diagram 9

Schematic Diagram 10

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