HarmanKardon-HK3475-rec-sm维修电路原理图.pdf

harman/kardon HK3375/HK3475 HK3375/HK3475 STEREO RECEIVERS SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 SPECIFICATIONS HK3375.4 SPECIFICATIONS HK3475.5 FRONT PANEL CONTROLS HK3375.6 REAR PANEL CONNECTIONS HK3375.9 REMOTE CONTROL FUNCTIONS HK3375.11 HK3375 OPERATION.13 HK3375 PROCESSOR RESET.14 FRONT PANEL CONTROLS HK3475.15 REAR PANEL CONNECTIONS HK3475.18 REMOTE CONTROL FUNCTIONS HK347520 HK3475 OPERATION.22 TROUBLESHOOTING GUIDE.24 HK3475 PROCESSOR RESET.24 ALIGNMENT PROCEDURES.25 BLOCK DIAGRAM.28 TECH TIP HKTT2003-05.29 TECH TIP HKTT2003-01.30 DISASSEMBLY PROCEDURES.31 EXPLODED VIEW HK3375.39 EXPLODED VIEW HK3475.40 MECH/ELECTRICAL PARTS LIST HK3375.41 MECH/ELECTRICAL PARTS LIST HK3475.59 SEMICONDUCTOR PINOUTS.77 PCB DRAWINGS110 SCHEMATICS.116 WIRING DIAGRAM.127 HK3375 PACKAGE.128 HK3475 PACKAGE.129 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev2 5/2007 RadioFans.CN 收音机爱 好者资料库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 theparts list in this manual. Leakage-current or resistance measurements must be made to determine that exposed parts are acceptablyinsulated 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 calledElectrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors andsemiconductor 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 onyour 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, toprevent 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 chargessufficient 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 replacementES 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 thechassis 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 togetheror your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES devices.CAUTION :2RadioFans.CN 收音机爱 好者资料库1. Inspect all lead dress to make certain thatleads are not pinched or that hardware is notlodged between the chassis and other metalpartsintheunit.2. Be sure that any protective devices such asnonmetallic control knobs, insulating fish-papers,cabinetbacks,adjustmentandcompartment covers or shields, isolationresistor-capacitynetworks,mechanicalinsulators, etc. Which were removed for theservicingareproperlyre-installed.Before returning the unit to the user, perform the following safety checks :3. Be sure that no shock hazard exists ; check for leakagecurrentusingSimpsonModel229LeakageTester,standardequipment item No. 21641, RCA Model WT540A or usealternate method asfollows : Plug the power cord directlyInto a 120 volt AC receptacle (do not use an IsolationTransformer for this test). Using two clip leads, connect a1500ohms,10wattResistorparalleledbya0.15uFcapacitor,inserieswithallexposedmetalcabinetpartsandaknownearthground,suchas 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 theresistor. (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.(Thistestshouldbeperformedwiththe0.35voltRMSormoreisexcessiveandindicatesapotentialshockhazardwhichmustbecorrectedbeforereturningtheunittotheowner.3 High Instantaneous Current Capability (HCC) 42 amps Transient Intermodulation Distortion (TIM) Unmeasurable Rise Time 16sec Slew Rate 40V/sec Selectivity 400kHz, 65dB Tuner Output Level 1kHz, 100kHz Deviation, 500mV 4High Instantaneous Current Capability (HCC) 45 amps Transient Intermodulation Distortion (TIM) Unmeasurable Rise Time 16sec Slew Rate 40V/sec Selectivity 400kHz, 65dB Tuner Output Level 1kHz, 100kHz Deviation, 500mV 5FRONT-PANEL CONTROLS 6FRONT-PANEL CONTROLSFRONT-PANEL CONTROLS21MEMORYPRESETSLEEPAUTOMUTET-MONTUNEDST79!#%&(8) $*2526272423222021345633751 Main Power Switch2 System Power Control3 Power Indicator4 Headphone Jack5 Mute6 Speaker 1 Selector7 Speaker 2 Selector8 Phone Input Selector9 T-Mon Input Selector) Tuning Button! Tape Input Selector Preset Scan# CD Input Selector$ Aux Input Selector% Preset Selector Dimmer Button& FM/AM Selector* FM Mode Selector( Sleep Button Bass Control Treble Control Balance Control Volume Control Volume/Mute Indicator Information Display Speaker Selection Indicators Remote Sensor Window1 Main Power Switch: Press this button to applypower to the HK 3375.When the switch is pressed in,the unit is placed in a Standby mode, as indicated bythe amber LED 3 surrounding the System PowerControl 2.This button MUST be pressed in to oper-ate the unit.To turn the unit off and prevent the use ofthe remote control, this switch should be pressed untilit 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 PowerSwitch 1 is “ON,” press this button to turn on theHK 3375; press it again to turn the unit off.ThePower Indicator 3 surrounding the switch will initially turn red as the HK 3375 performs a self-check, and it will change to green when the unit is on and ready for use.3 Power Indicator: This LED will light in amberwhen the unit is in the Standby mode to signal that the unit is ready to be turned on.When the unit isturned on, the indicator will briefly turn red, and thenchange to green.A red indicator during normal operation 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 listento the HK 3375s output through a pair of headphones.Be certain that the headphones have a standard 14stereo phone plug.5 Mute: Press this button to momentarily silence thespeaker output of the HK 3375.6 Speaker 1 Button: Press this button to turn thespeakers connected to the Speaker 1OutputTerminals on or off.7 Speaker 2 Button: Press this button to turn thespeakers connected to the Speaker 2OutputTerminals on or off.8 Phono Input Selector: Press this button to selectthe output of a turntable that is connected to thePhono Inputs.9 T-Mon Input Selector: Press this button to listento the output of a tape recorder connected to theTape Monitor Inputs. The T-Mon Indicator Iwill light to indicate that the input source is beingmonitored when the HK 3375 is connected to athree-head tape deck or another unit with off-headplayback.) Tuning Button: Press the left side of the button totune lower-frequency stations and the right side of thebutton to tune higher-frequency stations.When a stationwith a strong signal is tuned, the TUNED Indicator F6FRONT-PANEL CONTROLS7 FRONT-PANEL CONTROLSwill light in the Information Display .A brief (1/2-second) press of the button will manually tune to thenext frequency increment, while pressing and holdingthe button for a longer period will automatically tune tothe next station with a signal strong enough foracceptable reception.! Tape Input Selector: Press this button to listen tothe output of a tape recorder or other device connectedto the Tape 2 Inputs . Preset Scan: Press this button to automaticallyscan through the stations that have been programmedin the HK 3375s memory.The tuner will play five sec-onds of each station before moving to the next presetstation.To stop the scan when the desired station isheard, press the button again. If no preset stationshave been programmed into the HK 3375s memory,themessage 0 PRESET will flash in the InformationDisplay when this button is pressed. (See page 15for more information on the tuner memory system.)# CD Input Selector: Press this button to listen to the output of a CD player connected to the CDInputs .$ Aux Input Selector: Press this button to listen to the output of a device connected to the AuxInputs .% Preset Selector: Press this button to step up ordown through the list of stations that has been enteredinto the preset memory. If no preset stations have been programmed into the HK 3375s memory, themessage 0 PRESET will flash in the InformationDisplay when this button is pressed. (See page15for more information on tuner programming.) Dimmer Button: Press this button to dim thefront-panel displays and indicators.The first press ofthe button will dim the displays to one-half normalbrightness; the next press will turn all displays offexcept for the Power Indicator 3 and the SpeakerSelection Indicators .When the panel isdimmed, it will return to normal brightness after the unit is turned off, then on again.& FM/AM Selector: Press this button to select thetuner as the input to the receiver.When the tuner is inuse, press this button to change between the AM andFM frequency bands.* FM Mode Selector: Press this button to selectthe Stereo or Mono mode for FM tuning. In the Stereomode, a STEREO Indicator Ewill light in theInformation Display , and stereo reception will beprovided when stations are transmitting stereo signals.In the Mono mode, the left and right signals fromstereo broadcasts will be mixed together and repro-duced through all channels. Select MONO for betterreception of weak signals.( Sleep Button: Press this button to place the unitin the Sleep mode. Each press of the button selectsthe amount of time that will remain before the unitautomatically goes into the Standby mode, as indicatedby the Sleep Timer A, in the following order: Bass Control: Turn this control to modify the low-frequency output of the left/right channels by as muchas 10dB. Set this control to a suitable position foryour taste and room acoustics. Treble Control: Turn this control to modify thehigh-frequency output of the left/right channels by asmuch as 10dB. Set this control to a suitable positionfor your taste and room acoustics. Balance Control: Turn this control to change therelative volume for the front left/right channels. Volume Control: Turn the knob clockwise toincrease volume, counterclockwise to decrease thevolume. Volume/Mute Indicator: This indicator will glowgreen when the HK 3375 is turned on. Its position willenable you to judge the relative volume of the uniteven when the speakers are muted or turned off.When the indicator is pointing toward the left, at an “8 oclock” position, the volume is low; when it ispointing to the right, as in a “3 oclock” position, thevolume is loud.We recommend that you do not turnthe Volume Control past the “12 oclock” position, atwhich point the audio signal will begin to distort. Suchdistortion, although inaudible, is capable of damagingyour hearing and your equipment.When the unit hasbeen muted by pressing the Mute Button 5 ,the indicator will flash. Information Display: This display delivers mes-sages and status indications to help you operate thereceiver. Speaker Selection Indicators: These indicatorslight as a green LED next to the designation for eachspeaker pair to show when they are active. Press the Speaker 1 6 or Speaker 2 7 selectors toactivate either pair of speakers. Remote Sensor Window: The sensor behindthis window receives infrared signals from the remotecontrol.Aim the remote at this area and do not blockor cover it unless an external remote sensor isinstalled.90min80min70min60min50min40min30min20min10minOFF7FRONT-PANEL INFORMATION DISPLAYREAR-PANEL INFORMATION DISPLAY 8MEMORYPRESETSLEEPAUTOMUTET-MONTUNEDSTABDEFHIJCGA Preset Number/Sleep TimerB Preset IndicatorC Sleep IndicatorD Memory IndicatorE Stereo IndicatorF Tuned IndicatorG Auto IndicatorH Main Information DisplayI Tape Monitor (T-Mon) IndicatorJ Mute IndicatorA Preset Number/Sleep Timer: When the tuner isin use, these numbers indicate the specific presetmemory location in use. (See page 15 for more infor-mation on preset stations.) When the Sleep function isin use, these numbers show how many minutesremain before the unit goes into the Standby mode.B Preset Indicator: This indicator lights when thetuner is in use to show that the Preset Number/Sleep Timer A is showing the stations presetmemory number. (See page 15 for more informationon tuner presets.)C Sleep Indicator: This indicator lights when theSleep function is in use.The numbers in the PresetNumber/Sleep Timer Indicators will show the minutesremaining before the HK 3375 goes into the Standbymode. (See page 14 for more information on theSleep function.)DMemory Indicator: This indicator flashes whenentering presets and other information into the tunersmemory.E Stereo Indicator: This indicator lights when an FMstation is being tuned in stereo.FTuned Indicator:This indicator lights when a sta-tion is being received with sufficient signal strength toprovide acceptable listening quality.G Auto Indicator: This indicator lights when thetuners Auto mode is in use.H Main Information Display: This display showsmessages relating to the status, input source, tuner orother aspects of the HK 3375s operation.I Tape Monitor (T-Mon) Indicator: When usedwith three-head cassette decks, or other recordingdevices that offer immediate playback of the recordingas it is being made, the HK 3375 allows you to moni-tor a recording rather than merely listening to the inputsource, or waiting until the recording session is com-pl