Harman Kardon HK-3490 & 230 free download

File name HK-3490 & 230.pdf

harman/kardon HK 3490/230 Service Manual harman/kardon Service Manual HK 3490/230 2 x 120W STEREO RECEIVER CONTENTS LEAKAGE CHECK 2 EXPLODED VIEW AND PARTS 13 ESD WARNING 3 ELECTRICAL PARTS LIST 14 TECHNICAL SPECIFICATIONS 4 SEMICONDUCTOR PINOUTS 34 TROUBLESHOOTING GUIDE 5 PCB DRAWINGS 58 FRONT PANEL CONTROLS 6 BLOCK DIAGRAM 64 REAR PANEL CONNECTIONS 7 WIRING DIAGRAM 65 PACKAGE LIST AND PARTS 8 AMP BIAS ADJUSTMENT 66 DISASSEMBLY 9 SCHEMATIC DIAGRAMS 67 Released EU2008 harman/kardon, Inc. Rev 0, 09/2008 250 Crossways Park Dr. Woodbury, New York, 11797 Page 1 of 70 harman/kardon HK 3490/230 Service Manual SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester between the earth ground and all exposed metal parts of the appliance (input/output terminals, screwheads, metal overlays, control shaft, etc.). Plug the AC line cord of the appliance directly into a 120V AC 60Hz outlet and turn the AC power switch on. Any current measured must not exceed o.5mA. Reading should not be above Leakage 0.5mA Device current under tester test Test all exposed metal surfaces Also test with plug reversed (Using AC adapter Earth plug as required) ground AC Leakage Test ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. Page 2 of 70 harman/kardon HK 3490/230 Service Manual Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatic