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harman/kardon Service Manual
AVR 139/230
AVR 141/230
AVR 142/230
5 x 40W 5.1 CHANNEL A/V RECEIVER
CONTENTS
ESD WARNING 2 ELECTRICAL PARTS LIST 10
BASIC SPECIFICATIONS 3 IC LIST 30
TROUBLESHOOTING GUIDE 4 SEMICONDUCTOR PINOUTS 31
PROCESSOR RESET 4 PCB DRAWINGS 69
PACKAGE LISTS AND PARTS 5 BLOCK DIAGRAM 74
DISASSEMBLY 8 WIRING DIAGRAM 75
EXPLODED VIEW AND PARTS 9 AMP BIAS ADJUSTMENT 76
SCHEMATIC DIAGRAMS 77-83
Released EU2009 Harman Consumer Group, Inc. Rev 0, 04/2009
8500 Balboa Boulevard
Northridge, California 91329
harman/kardon AVR 139-141-142/230 Service Manual
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.
CAUTION : 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.
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.
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harman/kardon AVR 139-141-142/230 Service Manual
Technical Specifications for AVR Surround Receiver
Audio Section FM Tuner Section
stereo Mode frequency Range 87.5