AVR 245 (serv.man4) - Harman Kardon Audio Service Manual (repair manual)

SERVICE MANUAL 
 
 
 
 
 
 
 
 
 

       

                    Power for the Digital Revolution® 

harman/kardon

AVR 245/230 service manual

Page 1 of 82

CONTENTS

harman/kardon, Inc.

250 Crossways Park Dr.

Woodbury, New York, 11797

Released 2007

Rev 0, 9/2007

Discontinued XXXX

TECHNICAL SPECIFICATIONS 53

Audio Section
Stereo Mode 
Continuous Average Power (FTC)

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

7 Channel Surround Modes 
Power Per Individual Channel

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

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

Surround (L & R Side, Back) channels:
50 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)

100dB

Surround System Adjacent Channel Separation 

Analog Decoding 

40dB 

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

55dB 

DTS

55dB

Frequency Response 

@ 1W (+0dB, –3dB)

10Hz–130kHz

High Instantaneous 
Current Capability (HCC)

±35 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 (DIN)

Distortion

Mono/Stereo: 0.2/0.3%

Stereo Separation

40dB @ 1kHz

Selectivity

±400kHz: 70dB

Image Rejection

80dB

IF Rejection

90dB

Frequency Range

522–1620kHz

Signal-to-Noise Ratio

45dB

Usable Sensitivity

Loop: 500µV

Distortion

1kHz, 50% Mod: 0.8%

Selectivity

±10kHz: 30dB

Video Format

PAL/NTSC

Input Level/Impedance

1Vp-p/75 ohms

Output Level/Impedance

1Vp-p/75 ohms

Video Frequency Response
(Composite and S-Video)

10Hz–8MHz (-3dB)

Video Frequency 
Response (Component)

10Hz–100MHz (-3dB)

Power Requirement

AC 220–240V/50Hz

Power Consumption

65W idle, 540W maximum 
(7 channels driven) 

Dimensions (Max)

Width

440mm 

Height

165mm 

Depth

382mm 

Weight

13.6 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, The Bridge

and Logic 7 are 

registered trademarks of Harman International Industries, Incorporated.

is a trademark of Harman International Industries, Inc.

*Manufactured under license from Dolby Laboratories.
“Dolby,” “Pro Logic” and the Double-D symbol are trademarks of Dolby Laboratories.

Please change to "DTS", "DTS ES", "Neo:6" and "96/24" are trademarks of DTS, Inc.

HDMI is a trademark of HDMI Licensing LLC.

SA-CD is a trademark of Sony Electronics, Inc.

Apple and iPod are registered trademarks of Apple Computer

, Inc.

Cirrus is a registered trademark of Cirrus Logic Corp.

**Without input anti slewing and output isolation networks.

30545_AVR245_ENG  19/10/06  12:21  Side 53

harman/kardon

AVR 245/230 service manual

Page 2 of 82

OPERATION

DOLBY DIGITAL

Available only with digital input sources encoded with Dolby Digital data. It provides up to 
five separate main audio channels and a special dedicated Low Frequency Effects channel.

DOLBY DIGITAL EX

Available when the receiver is configured for 6.1/7.1 channel operation, Dolby Digital EX is the 
latest version of Dolby Digital. When used with movies or other programs that have special 
encoding, Dolby Digital EX reproduces specially encoded soundtracks so that a full 6.1/7.1 
soundfield is available. When the receiver is set for 6.1/7.1 operation and a Dolby Digital signal is 
present, the EX mode is automatically selected. Even if specific EX encoding is not available to 
provide the additional channel, the special algorithms will derive a 6.1/7.1 output.

DTS 5.1

When the speaker configuration is set for 5.1-channel operation, the DTS 5.1 mode is  
available when DVD, audio-only music or laserdiscs encoded with DTS data are played.
DTS 5.1 provides up to five separate main audio channels and a special dedicated 
low-frequency channel.

DTS-ES 6.1 Matrix

When the speaker configuration is set for 6.1/7.1 operation, playback of a DTS-encoded program

DTS-ES 6.1 Discrete

source will automatically trigger the selection of one of the two DTS-ES modes. Newer discs with
special DTS-ES discrete encoding will be decoded to provide six discrete, full-bandwidth channels
plus a separate low-frequency channel. All other DTS discs will be decoded using the DTS-ES Matrix 
mode, which creates a 6.1-channel sound field from the original 5.1-channel soundtrack.

DOLBY PRO LOGIC II

Dolby Pro Logic II is the latest version of Dolby Laboratory’s benchmark surround technology

MOVIE

that decodes full-range, discrete left, center right, right surround and left surround channels 

MUSIC

from matrix surround encoded programs and conventional stereo sources when  

DOLBY PRO LOGIC an analog input or a digital input with PCM or Dolby Digital 2.0 recordings is in use. The  
GAME

Dolby Pro Logic II Movie mode is optimized for movie soundtracks that are recorded with matrix 
surround, by creating separate center, rear left and rear right signals. while the Pro Logic II Music 
mode should be used with musical selections that are recorded with matrix surround or even with 
normal stereo mode, creating separate rear left and rear right signals in any case. The Pro Logic II 
mode creates compelling five-channel surround sound from conventional stereo recordings. Game 
mode ensures that special effects are routed to the surround channels, while delivering their full 
impact using the subwoofer, thus fully immersing the game player in the universe of the video game.

DOLBY PRO LOGIC IIx Dolby Pro Logic IIx is the latest extension of Dolby Pro Logic II technology that creates a discrete 

MUSIC

6.1 and 7.1 sound field from matrix surround or two-channel stereo sources in systems 

MOVIE

configured for surround back speakers. Both Movie and Music versions of Pro Logic IIx are 

GAME

available. Movie, Music and Game versions of Pro Logic IIx are available. Game mode ensures that 
special effects are routed to the surround channels, while delivering their full impact using the 
subwoofer, thus fully immersing the game player in the universe of the video game.

Logic 7 Cinema

Exclusive to Harman Kardon for AV receivers, Logic 7 is an advanced mode that extracts the 

Logic 7 M

usic

maximum surround information from either surround-encoded programs or conventional stereo 
material. Depending on the number of speakers in use and the selection made in the 

SURROUND

SELECT

menu, the “5.1” versions of Logic 7 modes are available when the 5.1 option is chosen,

while the “7.1” versions of Logic 7 produce a full sound field presentation, including back surround 
speakers when the “6.1/7.1” option is chosen. The Logic 7 C (or Cinema) mode should be used 
with any source that contains Dolby Surround or similar matrix encoding. Logic 7 C delivers 
increased center-channel intelligibility, and more accurate placement of sounds with fades and pans 
that are much smoother and more realistic than with former decoding techniques. The Logic 7 M or 
Music mode should be used with analog or PCM stereo sources. Logic 7 M enhances the listening 
experience by presenting a wider front soundstage and greater rear ambience. Both Logic 7 modes 
also direct low-frequency information to the subwoofer (if installed and configured) to deliver 
maximum

bass impact.

harman/kardon

AVR 245/230 service manual

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OPERATION

DTS Neo:6 Cinema

These two modes are available when any analog source is playing to create a six-channel 

DTS Neo:6 Music

surround presentation from conventional Matrix-encoded and traditional Stereo sources. Select 
the Cinema version of Neo:6 when a program with any type of analog Matrix surround encoding 
is present. Select the Music version of Neo:6 for optimal processing when a nonencoded,
two-channel stereo program is being played.
When selecting a DTS Neo:6 Cinema mode, a 3-, 5- or 6-channel configuration may be available,
depending on the number of speakers in your system. Use 3-channel mode when only a front left and 
right and a center speaker are present; surround-channel information will be mixed into these speakers.
The 6-channel mode will only be available if you have configured your surround back speakers as active.

DTS 96/24 

DTS 96/24 is a high-resolution format that uses a 96kHz sampling rate with 24 bits to produce extended 
information that improves the harmonics of the source material. The AVR is capable of automatically detecting 
and decoding DTS 96/24 materials and delivering them as the artist intended.

Dolby 3 Stereo 

Uses the information contained in a surround-encoded or two-channel stereo program to create center-channel 
information. In addition, the information that is normally sent to the rear-channel surround speakers is carefully 
mixed in with the front-left and front-right channels for increased realism.
Use this mode when you have a center channel speaker but no surround speakers.

Dolby Virtual Speaker Dolby Virtual Speaker technology uses a next-generation advanced algorithm to reproduce the dynamics and surround 
Reference

sound effects of a precisely placed 5.1-channel speaker system using only front left and right speakers. In the 

Wide

Reference Mode, the apparent width of the sound across the front image is defined by the distance between the two 
speakers. The Wide Mode provides a wider, more spacious front image when the two speakers areclose together.

THEATER

The THEATER mode creates a sound field that resembles the acoustic feeling of a 
standard live performance theater, with stereo and even pure mono sources.

HALL 1

The two Hall modes create sound fields that resemble a small (HALL1) or

HALL 2

medium sized (HALL 2) concert hall, with stereo and even pure mono 

sources.

5-Chan

nel Stereo

This mode takes advantage of multiple speakers to place a stereo signal at both the front and

7-Channel Stereo

back of a room. Depending on whether the AVR has been configured for either 5.1 or 6.1/7.1 
operation, one of these modes, but not both, is available at any time. Ideal for playing music in 
situations such as a party, this mode places the same signal at the front-left and surround-left,
and at the front-right and surround-right speakers. The center channel is fed a summed mono 
mix of the in-phase material of the left and right channels.

Surround Off (Stereo)

These modes turn off all surround processing and present the pure left- and right-channel presentation of 

Surround Off (Bypass)  two-channel stereo programs. The Surround Off (Bypass) mode may only be used with analog source inputs,
DSP Surround Off 

as it preserves the analog format of the audio signal for its entire path of travel through the receiver to the 
speaker and subwoofer outputs, bypassing all digital processing. Digital bass management is not available in 
Surround Off mode. The DSP Surround Off mode can be used with either an analog or digital input, as the 
signal undergoes digital bass management to optimize the distribution of the low frequencies between the
main speakers and a subwoofer.

Dolby Headphone 

Dolby Headphone enables ordinary stereo headphones to portray the sound of a five-speaker 

DH1 

surround-playback system. The DH1 mode creates headphone presentation that resembles a small,

DH2 

well-damped room and is appropriate for use with both movies and music-only recordings.

DH3 

The DH2 mode creates a more acoustically live room particularly suited to music listening.
The DH3 mode creates a larger room, more like a concert hall or movie theater.

harman/kardon

AVR 245/230 service manual

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