AVR 347 (serv.man4) - Harman Kardon Audio Service Manual (repair manual)

avr 347 (serv.man4) service manual
Model
AVR 347 (serv.man4)
Pages
95
Size
19.15 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
avr-347-sm4.pdf
Date

Read Harman Kardon AVR 347 (serv.man4) Service Manual online

 
 
harman/kardon
    
            Service Manual 
 
 
                               
                                                
 
 
AVR 347/230 
AVR 350/230 
7 x 55W  7.1 CHANNEL A/V RECEIVERS 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CONTENTS
 
 
 
 
 
 
 
 
 
 
ESD 
WARNING 
   2 
BASIC 
SPECIFICATIONS 
  3 
TROUBLESHOOTING GUIDE 
 
PROCESSOR 
RESET   4 
AVR 347 PACKAGE LIST AND PARTS 
AVR 347 DISASSEMBLY 
 
 
AVR 347 DISASSEMBLY PROCEDURE 
AVR347 EXPLODED VIEW AND PARTS   11 
AVR350 PACKAGE LIST AND PARTS      12 
AVR 350 DISASSEMBLY 
 
 
13 
AVR 350 EXPLODED VIEW AND PARTS  14 
ELECTRICAL 
PARTS 
LIST 
  15 
PCB 
DRAWINGS 
   74 
BLOCK 
DIAGRAM 
   83 
WIRING 
DIAGRAM 
   84 
AMP 
BIAS 
ADJUSTMENT 
  85 
SCHEMATIC 
DIAGRAMS 
  86 
 
 
 
 
 
 
 
 
(For Semiconductor Pinouts, see separate file ) 
 
 
 
 
Released 
EU2008 
   harman/kardon, 
Inc. 
  Rev 
0, 
07/2008 
 
 
 
 
 
       250 Crossways Park Dr. 
      
 
 
Woodbury, 
New 
York, 
11797 
 
 
 
 
harman/kardon
AVR 347/230 - AVR 350/230 Service Manual
Page 1 of 95
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 347/230 - AVR 350/230 Service Manual
Page 2 of 95
2
TECHNICAL SPECIFICATIONS 61
ENGLISH
Technical Specifications
Audio Section
Stereo Mode 
Continuous Average Power (FTC)
70 Watts per channel, 20Hz–20kHz,
@ < 0.07% THD, both channels driven into 8 ohms
7 Channel Surround Modes 
Power Per Individual Channel (all channels driven simultanously)
Front L&R channels:
55 Watts per channel,
@ < 0.07% THD, 20Hz–20kHz into 8 ohms
Center channel:
55 Watts, @ < 0.07% THD, 20Hz–20kHz into 8 ohms
Surround (L & R Side, Back) channels:
55 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**
FM Tuner Section
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
AM Tuner Section
Frequency Range
522–1620kHz
Signal-to-Noise Ratio
45dB
Usable Sensitivity
Loop: 500µV
Distortion
1kHz, 50% Mod: 0.8%
Selectivity
±10kHz: 30dB
Video Section
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)
General
Power Requirement
AC 220–240V/50Hz
Power Consumption
118W idle, 890W maximum 
(7 channels driven) 
Dimensions (Max)
Width
440mm 
Height
165mm 
Depth
382mm 
Weight
13.9 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.
"DTS","DTS ES","Neo:6"and"96/24" are trademarks of DTS,Inc.
SA-CD is a trademark of Sony Electronics, Inc.
Blu-ray Disc is a trademark of the Blu-ray Disc Association.
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.
A-BUS and A-BUS/
READY
®
Ready are registered trademarks of Leisure Tech Electronics Pty Ltd
Australia.
Faroudja and DCDi by Faroudja are trademarks of Genesis Microchip, Inc.
HD-DVD is a trademark of the DVD Format/Logo Licensing Corporation (DVD FLLC).
HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered
trademarks of HDMI Licensing, LLC.
This product incorporates copyright protection technology that is protected by method
claims of certain U.S. patents and other intellectual property rights owned by Macrovision
Corporation and other rights owners. Use of this copyright protection technology must be
authorized by Macrovision Corporation, and is intended for home and other limited viewing
uses only unless otherwise authorized by Macrovision Corporation. Reverse engineering or
disassembly is prohibited.
33097_AVR347_Eng  15/05/07  12:36  Side 61
harman/kardon
AVR 347/230 - AVR 350/230 Service Manual
Page 3 of 95
60 TROUBLESHOOTING GUIDE
Troubleshooting Guide
Processor Reset
In the rare case where the unit’s operation or the
displays seem abnormal, the cause may involve
the erratic operation of the system’s memory or
microprocessor.
To correct this problem, first unplug the unit from
the AC wall outlet and wait at least three
minutes. After the pause, reconnect the AC
power cord and check the unit’s operation. If the
system still malfunctions, a system reset may
clear the problem.
To clear the AVR’s entire system memory includ-
ing tuner presets, output level settings, delay
times and speaker configuration data, first put
the unit in Standby by pressing the System
Power Control 
button 2. Next press and hold
the Tone Mode button 8 for three seconds.
The unit will turn on automatically. Note that
once you have cleared the memory in this manner,
it is necessary to re-establish all system configura-
tion settings and tuner presets.
NOTE: Resetting the processor will erase any
configuration settings you have made for
speakers, output levels, surround modes, digital
input assignments as well as the tuner presets.
After a reset the unit will be returned to the
factory presets, and all settings for these items
must be reentered.
If the system is still operating incorrectly, there
may have been an electronic discharge or severe
AC line interference that has corrupted the
memory or microprocessor.
If these steps do not solve the problem, consult
an authorized Harman Kardon service depot.
SYMPTOM
CAUSE
SOLUTION
Unit does not function when Main
• No AC Power
• Make certain AC power cord is plugged 
Power Switch 1 is pushed
into a live outlet
• Check to see if outlet is switch controlled
Display lights, but no sound 
• Intermittent input connections
• Make certain that all input and speaker 
or picture
connections are secure
• Mute is on
• Press Mute button 
G
• Volume control is down
• Turn up volume control
No sound from any speaker;
• Amplifier is in protection mode
• Check speaker-wire connections for shorts at receiver 
light around Power switch 2 is red
due to possible short
and speaker ends
• Amplifier is in protection mode 
• Contact your local Harman Kardon service depot
due to internal problems
No sound from surround or 
• Incorrect surround mode
• Select a mode other than Stereo
center speakers
• Input is mono
• There is no surround information from mono sources (except with
Theater and Hall surround modes)
• Incorrect configuration
• Check speaker mode configuration
• Stereo or Mono program material
• Some surround modes may not create rear-channel information 
from nonencoded programs
Unit does not respond to 
• Weak batteries in remote
• Change remote batteries
remote commands
• Wrong device selected
• Press the AVR Selector
5
• Remote sensor Ú is obscured
• Make certain front-panel sensor is visible to remote or 
connect remote sensor
Intermittent buzzing in tuner
• Local interference
• Move unit or antenna away from computers, fluorescent lights,
motors or other electrical appliances
Letters flash in the Channel Indicator
• Digital audio feed paused
• Resume play for DVD
Display $ and Digital Audio stops
• Check that Digital Signal is fed to the Digital Input selected
33097_AVR347_Eng  15/05/07  12:36  Side 60
harman/kardon
AVR 347/230 - AVR 350/230 Service Manual
Page 4 of 95
Page of 95

Download Harman Kardon AVR 347 (serv.man4) Service Manual (Repair Manual)

Here you can read online and download Harman Kardon AVR 347 (serv.man4) Service Manual in PDF. AVR 347 (serv.man4) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Harman Kardon AVR 347 (serv.man4) Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.