AVR 760 (serv.man4) — Harman Kardon Audio Service Manual (repair manual)

            Service Manual 

Released EU2010   

 

Harman Consumer Group, Inc. 

 

       Rev 2, 07/2011 

 

 

 

 

       8500 Balboa Boulevard 

 

 

 

 

   Northridge, California 91329 

CONTENTS 

PACKING DRAWING AND PARTS              6 
FRONT AND REAR PANELS 

Harman Kardon

AVR 660 -760, 230V Service Manual

Page 1 of 264

Each precaution in this manual should be followed during servicing.

Components identified with the IEC symbol

in the parts list are special significance to safety. When replacing a component identified with

, use only the replacement parts designated, or parts with the same ratings or resistance, wattage, or voltage that are designated in the

parts list in this manual. Leakage-current or resistance measurements must be made to determine that exposed parts are acceptably

insulated from the supply circuit before retuming the product to the customer.

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called

Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors and

semiconductor "chip" components.

The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on

your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device,

which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to

prevent electrostatic charge build-up or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges

sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical change sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement

ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material.)

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the

chassis or circuit assembly into which the device will be installed.

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together

or your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES devices.

CAUTION :

Harman Kardon

AVR 660 -760, 230V Service Manual

Page 2 of 264

The following check should be performed for the continued
protection of the customer and service technician.

Measure leakage current to a known earth ground (water
pipe, conduit, etc.) by connecting a leakage current tester
between the earth ground and all exposed metal parts of the
appliance (input/output terminals, screwheads, metal
overlays, control shaft, etc.). Plug the AC line cord of the
appliance directly into a 120V AC 60Hz outlet and turn the
AC power switch on. Any current measured must not exceed
o.5mA.

Device

under

test

Test all
exposed metal
surfaces

Also test with
plug reversed
(Using AC adapter
plug as required)

Leakage
current
tester

Reading should
not be above
0.5mA

Earth
ground

Harman Kardon

AVR 660 -760, 230V Service Manual

Page 3 of 264

5

INTRODUCTION

Please register your AVR 760/AVR 660 at www.harmankardon.com.
NOTE:  You’ll need the product’s serial number. At the same time, you can 
choose to be notified about new products and/or special promotions.

For more than fifty years, the Harman Kardon® mission has been to share 
a passion for music and entertainment, using leading-edge technology to 
achieve premium performance. Harman Kardon, Inc.,  invented the receiver, 
a single component designed to simplify home entertainment without 
compromising performance. Over the years, Harman Kardon products have 
become easier to use, while offering more features and sounding better 
than ever. The AVR 760 multizone 7.2-channel digital audio/video receiver 
(AVR 660 is 7.1-channel) continues this tradition with some of the most 
advanced audio and video processing capabilities yet, and a wealth of 
listening and viewing options.

To obtain the maximum enjoyment from your new receiver, please read this 
manual and refer back to it as you become more familiar with its features and 
their operation.

If you have any questions about this product, its installation or its operation, 
please contact your Harman Kardon retailer or custom installer, or visit the 
Web site at www.harmankardon.com.

AVR 760

 

: 85 Watts x 7, seven channels driven at full power at 8 ohms, 

20Hz – 20kHz, <0.07% THD, 595 watts total. AVR 660: 75 Watts x 7, 525 
watts total.

High-current capability, ultrawide-bandwidth amplifier design with low 

 

negative feedback

All-discrete amplifier circuitry

 

Quadruple-crossover bass management with DVD-Audio bass 

 

management capability

Dual 32-bit TI DA 710 DSP processors

 

192kHz/24-bit A/D and D/A conversion

 

Sampling upconversion to 96kHz

 

Dolby® Volume processing

 

Dolby Digital EX, Dolby Digital Plus, Dolby TrueHD 

 

Dolby Pro Logic® II and IIx (Movie, Music and Game), up to 96kHz

 

Dolby Virtual Speaker Version 2 (Reference or Wide, 2-channel)

 

Dolby Headphone Version 2, up to 96kHz 

 

DTS-HD High Resolution Audio™, DTS-HD Master Audio™

 

DTS® (5.1; DTS Stereo; DTS-ES® 6.1 Discrete and Matrix)

 

DTS 96/24™ (DTS Stereo)

 

DTS Neo:6® (Cinema 5-,6- or 7-channel; Music 5-, 6- or 7-channel), up to 

 

96kHz

Logic 7® (Movie, Music and Game), up to 96kHz

 

5- or 7-Channel Stereo, up to 96kHz

 

Surround Off (DSP or Analog Bypass)

 

Harman Kardon

Page 4 of 264