Harman Kardon AVR-125 free download

File name AVR-125.pdf

harman/kardon AVR125 A/V DOLBY DIGITAL RECEIVER SERVICE MANUAL CONTENTS ESD WARNING...2 DISASSEMBLY PROCEDURE...18 LEAKAGE TESTING...3 AMPLIFIER BIAS ADJUSTMENT...21 BASIC SPECIFICATIONS...4 BLOCK DIAGRAM...22 FRONT PANEL CONTROLS...5 IC PINOUTS...23 FRONT PANEL DISPLAY...7 TRANSISTOR PINOUTS...52 REAR PANEL CONNECTIONS...9 ELECTRICAL PARTS LIST...53 REMOTE CONTROL FUNCTIONS...11 PCB DRAWINGS...62 INSTALLATION AND CONNECTIONS...14 SCHEMATICS...70 TROUBLESHOOTING GUIDE...16 WIRING DIAGRAM...82 MICROPROCESSOR RESET...16 PACKAGING...83 UNIT EXPLODED VIEW...17 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev5 2/2005 AVR125 harman/kardon 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