Harman Kardon HK-3840 free download

File name Harman-Kardon-HK-3480-Service-Manual-2.pdf

harman/kardon HK3480 STEREO RECEIVER SERVICE MANUAL CONTENTS ESD WARNING...2 DISASSEMBLY PROCEDURES...17 LEAKAGE TESTING...3 EXPLODED VIEW ...20 SPECIFICATIONS ...4 BLOCK DIAGRAM...21 FRONT PANEL CONTROLS ... ...5 FRONT PANEL DISPLAY...22 REAR PANEL CONNECTIONS ...8 IC DESCRIPTIONS/PINOUTS...26 REMOTE CONTROL FUNCTIONS ...10 ELECTRICAL PARTS LIST ...40 TROUBLESHOOTING GUIDE...12 PCB DRAWINGS...46 PROCESSOR RESET...12 SCHEMATICS...48 AMPLIFIER BIAS ADJUSTMENT...13 WIRING DIAGRAM...54 BULLETIN HK2003-10... ...14 PACKAGE...55 BULLETIN HK2004-02... ...16 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev1 8/2004 HK3480 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 c