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harman/kardon

A/V DOLBY DIGITAL RECEIVER

PRELIMINARY

SERVICE MANUAL

CONTENTS

ESD WARNING…………………..….……….2
LEAKAGE TESTING………………...….…....3
BASIC SPECIFICATIONS……………….…..4
DETAILED SPECIFICATIONS………….…..5
FRONT PANEL CONTROLS………….…..13
REAR PANEL CONNECTIONS……..….…15
REMOTE CONTROL FUNCTIONS……….17
SERVICE BULLETINS/TECH TIPS…..….20
IDLE CURRENT ADJUST………………...23
TUNER ALIGNMENT………………….…..24

TROUBLESHOOTING GUIDE…...…….…27
UNIT EXPLODED VIEW…………………..28
EXPLODED VIEW………………………….29
BLOCK DIAGRAM…………………………30
PCB DRAWINGS……………………..……31
MECHANICAL PARTS LIST………………47
ELECTRICAL PARTS LIST……………….67
SCHEMATICS………………….…..………70
WIRING DIAGRAM………………………...94
PACKAGE…………………………………..95

harman/kardon, Inc.

       250 Crossways Park Dr.
   Woodbury, New York   11797

Rev1 – 11/2000

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 :

1. Inspect all lead dress to make certain that

leads are not pinched or that hardware is not

lodged between the chassis and other metal

parts in the unit.

2. Be sure that any protective devices such as

nonmetallic control knobs, insulating fish-

papers, cabinet backs, adjustment and

compartment covers or shields, isolation

resistor-capacity networks, mechanical

insulators, etc. Which were removed for the

servicing are properly re-installed.

Before returning the unit to the user, perform the following safety checks :

3. Be sure that no shock hazard exists ; check for leakage

current using Simpson Model 229 Leakage Tester, standard

equipment item No. 21641, RCA Model WT540A or use

alternate method as follows : Plug the power cord directly

Into a 120 volt AC receptacle (do not use an Isolation

Transformer for this test). Using two clip leads, connect a

1500 ohms, 10watt Resistor paralleled by a 0.15uF capacitor, in series with all exposed metal cabinet parts and a known earth ground, such

as a water pipe or conduit. Use a VTVM or VOM with 1000 ohms per volt, or higher sensitivity to measure the AC voltage drop across the

resistor. (See diagram) Move the resistor connection to each exposed metal part having a return path to the chassis (antenna, metal,

cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. (This test should be

performed with the 0.35 volt RMS or more is excessive and indicates a potential shock hazard which must be corrected before returning the

unit to the owner.

TECHNICAL SPECIFICATIONS

Audio Section
Stereo Mode 
Continuous Average Power (FTC)

110 Watts per channel, 20Hz–20kHz,
@ < 0.07% THD, both channels driven into 8 ohms

Five-Channel Surround Modes 
Power Per Individual Channel

Front L&R channels:
100 Watts per channel,
@ < 0.07% THD, 20Hz–20kHz into 8 ohms

Center channel:
100 Watts, @ < 0.07% THD, 20Hz–20kHz into 8 ohms

Surround channels:
100 Watts per channel,
@ < 0.07% THD, 20Hz–20kHz into 8 ohms

Input Sensitivity/Impedance

Linear (High Level)

200mV/47kohms

Signal-to-Noise Ratio (IHF-A)

95dB

Surround System Adjacent Channel Separation

Analog Decoding 

40dB

(Pro Logic, etc.)
Dolby Digital (AC-3)

55dB

DTS

55dB

Frequency Response 

@ 1W (+0dB, –3dB)

10Hz–100kHz

High Instantaneous 
Current Capability (HCC)

±75 Amps

Transient Intermodulation 
Distortion (TIM)

Unmeasurable

Rise Time

16 µsec

Slew Rate

40V/µsec

Frequency Range

87.5–108MHz

Usable Sensitivity

IHF 1.3 µV/13.2dBf

Signal-to-Noise Ratio

Mono/Stereo 70/68dB

Distortion

Mono/Stereo 0.2/0.3%

Stereo Separation

40dB @ 1kHz

Selectivity

±400kHz, 65dB

Image Rejection

80dB

IF Rejection

90dB

Tuner Output Level

1kHz, ±75kHz Dev 500mV

Frequency Range

520–1720kHz

Signal-to-Noise Ratio

45dB

Usable Sensitivity

Loop 500µV

Distortion

1kHz, 50% Mod 0.8%

Selectivity

±10kHz, 30dB

Video Format

NTSC

Input Level/Impedance

1Vp-p/75 ohms

Output Level/Impedance 1Vp-p/75 ohms
Video Frequency 

5Hz–10MHz (–3dB)

Response

Power Requirement

AC 120V/60Hz

Power Consumption

125W idle, 1100W maximum 
(2 channels driven)

Dimensions (Max)

Width

17.3 inches (440mm)

Height

7.62 inches (193mm)

Depth

20.43 inches (519mm)

Weight

49 lb (22.3 kg)

Depth measurement includes knobs, buttons and terminal connections.
Height measurement includes feet and chassis.
All features and specifications are subject to change without notice.

Harman Kardon is a registered trademark, and Power for the digital revolution is a
trademark, of Harman International Industries, Inc.

*Manufactured under license from Dolby Laboratories.
“Dolby,” “Pro Logic,” “AC-3” and the Double-D symbol are
trademarks of Dolby Laboratories. Confidential Unpublished
Works. ©1992–1999 Dolby Laboratories, Inc. All rights reserved.

†DTS and DTS Surround are trademarks of Digital Theater Systems, Inc.
††UltraStereo is a trademark of UltraStereo Corp.

VMAx is a trademark of Harman International Industries, Inc., and is an 
implementation of Cooper Bauck Transaural Stereo under patent license.

Logic 7 is a registered trademark of Lexicon, Inc.

HDCD is a registered trademark of Pacific Microsonics.

Crystal is a registered trademark of Cirrus Logic Corp.