HarmanKardon-HK3470-rec-sm2维修电路原理图.pdf
harman/kardon hk3370/3470 STEREO RECEIVER PRELIMINARY SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 BASIC SPECIFICATIONS hk3370.4 BASIC SPECIFICATIONS hk3470.5 FRONT PANEL CONTROLS hk3370.6 REAR PANEL CONNECTIONS hk3370.8 REMOTE CONTROL FUNCTIONS HK3370.10 FRONT PANEL CONTROLS hk3470.12 REAR PANEL CONNECTIONS hk3470.15 REMOTE CONTROL FUNCTIONS HK3470.17 TROUBLESHOOTING GUIDE.19 ALIGNMENT PROCEDURES.20 WAVEFORMS.23 BLOCK DIAGRAM.28 EXPLODED VIEW HK3370.29 EXPLODED VIEW HK3470.30 DISASSEMBLY PROCEDURES.31 MECHANICAL PARTS LIST HK3370.39 ELECTRICAL PARTS LIST HK3370.40 MECHANICAL PARTS LIST HK3370.57 ELECTRICAL PARTS LIST HK3370.58 IC DESCRIPTIONS.75 PCB DRAWINGS.86 SCHEMATICS.92 WIRING DIAGRAM.103 PACKAGE.104 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 RadioFans.CN Eachprecautioninthismanualshouldbefollowedduringservicing. Components identified with the IEC symbolin 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 : RadioFans.CN 2 1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal partsintheunit. 2. Be sure that any protective devices such as nonmetallic control knobs, insulating fish- papers,cabinetbacks,adjustmentand compartment covers or shields, isolation resistor-capacitynetworks,mechanical insulators, etc. Which were removed for the servicingareproperlyre-installed. Before returning the unit to the user, perform the following safety checks : 3. Be sure that no shock hazard exists ; check for leakage currentusingSimpsonModel229LeakageTester,standard equipment item No. 21641, RCA Model WT540A or use alternate method asfollows : Plug the power cord directly Into a 120 volt AC receptacle (do not use an Isolation Transformer for this test). Using two clip leads, connect a 1500ohms,10wattResistorparalleledbya0.15uFcapacitor,inserieswithallexposedmetalcabinetpartsandaknownearthground,such as a water pipe or conduit. Use a VTVM or VOM with 1000 ohms per volt, or higher sensitivity to measure the AC voltage drop across the resistor. (See diagram) Move the resistor connection to each exposed metal part having a return path to the chassis (antenna, metal, cabinet,screwheads,knobsandcontrolshafts,escutcheon,etc.)andmeasuretheACvoltagedropacrosstheresistor.(Thistestshouldbe performedwiththe0.35voltRMSormoreisexcessiveandindicatesapotentialshockhazardwhichmustbecorrectedbeforereturningthe unittotheowner. RadioFans.CN 3 15 TROUBLESHOOTING GUIDE Troubleshooting Guide This unit is designed for trouble-free operation. Most problems users encounter are due to operating errors. So, if you have a problem, first check this list for a possible solution. If the problem persists, consult your authorized Harman Kardon Service Center. If the problem is.Make sure that the. No lights illuminate when POWER button is pressedUnit is plugged into a live outlet Main power switch is pressed in No sound is heardUnit has not been muted Correct input function selector button has been pressed Volume is turned up The speakers have been turned on using the Speaker Selectors No output from one or more channelsCables are not defective: check/replace speaker cables Tuner sound has a large amount of interference, orThe antenna is properly connected The “Stereo” display is not illuminated, orThe antenna is properly located Tuner sound distorts and/or volume level is too lowThe antenna is set in the proper direction The antenna is adequate to receive the desired station Tuner is intermittent or continuously buzzing or hissingThe unit is away from fluorescent lights,TVs, motors and other electrical appliances Technical Specifications Audio Section Stereo Mode Continuous Average Power (FTC) 70 Watts per channel, 20Hz20kHz < 0.07% THD, both channels driven into 8 ohms 95 Watts per channel, 20Hz20kHz 80dB IF Rejection100dB Tuner Output Level1kHz, 100kHz Dev 500mV AM Tuner Section Frequency Range5201710kHz Signal-to-Noise Ratio40dB Usable SensitivityLoop 500V/M Distortion1kHz, 50% Mod 0.8% Selectivity10kHz, 25dB General Power RequirementAC 120V/60Hz Power Consumption72W idle, 332W maximum (both channels driven) Dimension (Max) Width17.4 inches (442mm) Height6.1 inches (156mm) Depth16.3 inches (415mm) Weight24.6 lb (11.2kg) 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 is a registered trademark, and Power for the digital revolution is a trademark, of Harman Kardon, Inc. HK3370 1. Technical Specification hk3370 4 250 Crossways Park Drive,Woodbury, New York 11797 2000 Harman Kardon, Incorporated Part #YIAR-K1001-02A Technical Specifications Audio Section Stereo Mode Continuous Average Power (FTC) 100 Watts per channel, 20Hz20kHz < 0.07% THD, both channels driven into 8 ohms 135 Watts per channel, 20Hz20kHz 80dB IF Rejection100dB Tuner Output Level1kHz, 100kHz Dev 500mV AM Tuner Section Frequency Range5201710kHz Signal-to-Noise Ratio40dB Usable SensitivityLoop 500V/M Distortion1kHz, 50% Mod 0.8% Selectivity10kHz, 25dB General Power RequirementAC 120V/60Hz Power Consumption72W idle, 332W maximum (both channels driven) Dimension (Max) Width17.4 inches (442mm) Height6.1 inches (156mm) Depth16.3 inches (415mm) Weight26.8 lb (12.1kg) 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 is a registered trademark, and Power for the digital revolution is a trademark, of Harman Kardon, Inc. VMAx is a registered trademark of Harman International Industries, Inc., and is an implementation of Cooper Bauck Transaural Stereo under patent license. HK3470 4 hk3470 5 6 FRONT PANEL CONTROLS 1 Main Power Switch: Press this button to apply power to the HK 3370.When the switch is pressed in, the unit is placed in a Standby mode, as indicated by the amber LED 3 surrounding the System Power Control 2.This button MUST be pressed in to operate the unit.To turn the unit off and pre- vent the use of the remote control, this switch should be pressed until it pops out from the front panel so that the word “OFF” may be read at the top of the switch. NOTE: In normal operation this switch is left in the “ON” position. 2 System Power Control: When the Main Power Switch 1 is “ON,” press this button to turn on the HK 3370; press it again to turn the unit off. Note that the Power Indicator surrounding the switch 3 will turn green when the unit is on. 3 Power Indicator: This LED will illumi- nate in amber when the unit is in the Standby mode to signal that the unit is ready to be turned on.When the unit is in operation, the indicator will briefly turn red, and then change to green.A red indicator during normal opera- tion means that the unit is in the Protect mode, and should be turned off and then checked for a possible speaker-wire short circuit. 4 Headphone Jack: This jack may be used to listen to the HK 3370s output through a pair of headphones.Be certain that the head- phones have a standard 14 stereo phone plug. 5 Mute: Press this button to momentarily silence the speaker output of the HK 3370. 6 Speaker 1 Button: Press this button to turn the speakers connected to the Speaker 1 output terminals on or off. 7 Speaker 2 Button: Press this button to turn the speakers connected to the Speaker 2 output terminals on or off. Front Panel Controls 21 MEMORYPRESET SLEEP AUTOMUTET-MONTUNEDST 79!#% the next press will turn all displays off except for the Power Indicator 3 and the Speaker Selection Indicators . Note that when the panel is dimmed, it will return to normal brightness after the unit is turned off, then on again. when it is pointing to the right, as in a “3 oclock” position, the volume is loud.When the unit has been muted by pressing the Mute button 5 , the indicator will flash. Information Display: This display delivers messages and status indications to help you operate the receiver. Speaker Selection Indicators: These indicators light as a green LED next to the designation for each speaker pair to show when they are active. Press the Speaker 1 7 or Speaker 2 7 Selectors to activate either pair of speakers. Remote Sensor Window: The sensor behind this window receives infrared signals from the remote control.Aim the remote at this area and do not block or cover it unless an external remote sensor is installed. 90 min 80 min 70 min 60 min 50 min 40 min 30 min 20 min 10 min OFF HK3370 ONLY 8 REAR PANEL CONNECTIONS Rear Panel Connections AC 120V 60HZ 400W (120V, 60Hz) IN FM 75 AM LOOP INININPLAYREC. OUTPLAYREC. OUTMONO RIGHTLEFT SUB OUTPRE OUTMAIN INTAPE MON.TAPE 2AUXCDPHONO OUT L R GND SPEAKER 1 (8 Ohms) SPEAKER 2 (8 Ohms) ? ? ? ? ? ? ? fi ? ? ? ? ? ? ? fl ? ? a ? ? ? AM Antenna FM Antenna Phono Ground Remote IR In Remote IR Out Phono Inputs CD Inputs Aux Inputs Tape Monitor Play/In Tape Monitor Record/Out Tape 2 Play/In Tape 2 Record/Out Main In Pre-Out/Main-In Jumper Pins fi Preamp Out fl Subwoofer Out Speaker 1 Terminals Speaker 2 Terminals Accessory Outlets a Power Cable HK3370 ONLY 9 REAR PANEL CONNECTIONS Rear Panel Connections AM Antenna: Connect theAM loop antenna supplied with the receiver to these terminals. If an externalAM antenna is used, make connections to the AM and GND terminals in accordance with the instructions supplied with the antenna. FM Antenna: Connect an indoor or external FM antenna to this terminal. Phono Ground: Connect the ground wire from a turntable to this terminal to reduce system hum. Remote IR In: If the HK 3370s front panel IR sensor is blocked due to cabinet doors or other obstructions,an external IR sensor may be used.Connect the output of the sensor to this jack. Remote IR Out: This connection permits the IR sensor in the receiver to serve other remote controlled devices. Connect this jack to the “IR IN” jack on Harman Kardon or other compatible equipment. Phono Inputs: Connect the outputs of your turntable or tone arm to these jacks. Note that only Moving Magnet (MM) type cartridges may be used. CD Inputs: Connect these jacks to the output of a compact disc player or CD changer. Aux Inputs: Connect these jacks to the line-level output of any audio device such as a TV, cable converter or portable audio player. Tape Monitor Play/In: Connect these jacks to the Play/Out jacks of an audio recorder. Tape Monitor Record/Out: Connect these jacks to the Rec/In jacks of an audio recorder. NOTE:When these jacks are connected to a three-head recorder or another device with off- head playback, it will be possible to monitor the source being recorded. Tape 2 Play/In: Connect these jacks to the PLAY/OUT jacks of a second audio recorder. Tape 2 Record/Out: Connect these jacks to the Rec/In jacks of a second audio recorder. Main In: These jacks are the input to the HK3370s power amplifier.Unless an external power amplifier is used,the jumper pins should remain connected to the Preamp Outjacks . Pre-Out/Main-In Jumper Pins: These pins connect the receivers preamp and amplifier sections.Unless an external amplifier, equalizer or speaker processor is used,they should be left connected.See page 12 for more informa- tion on external amplifier connections. fi Preamp Out: These jacks provide an output for the left and right channels to an optional external amplifier. In normal opera- tion, unless an external power amplifier is used, the jumper pins should remain connected to the Main In jacks . fl Subwoofer Out: Connect these jacks to the line level input of a powered subwoofer. If an external subwoofer amplifier is used, connect this jack to the subwoofer amplifier input.When a single, mono subwoofer is used, make the connection to the bottom jack. Speaker 1 Terminals: Connect these terminals to the appropriate terminals on your speakers. Speaker 2 Terminals: Connect these terminals to the appropriate terminals on your speakers. Accessory Outlets: These outlets may be used to power low-current draw devices such as CD players or cassette decks.The power to these outlets remains on as long as the receiver itself is on.When the receiver is turned off, or placed in the Standby mode, power to these outlets is removed
