HarmanKardon-HK3375-rec-sm电路图 维修手册.pdf

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1、 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 RE

2、SET.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

3、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

4、/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 ratin

5、gs 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

6、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 use

7、d 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 commercia

8、lly 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 electrosta

9、tic 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.

10、 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 sh

11、orted 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

12、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 gene

13、rate static electricity sufficient to damage an ES devices. CAUTION : 2 RadioFans.CN 收音机爱 好者资料库 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 nonme

14、tallic 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 che

15、cks : 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 t

16、est). 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.

17、(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 performedwiththe0.35voltRMSormoreisexcessiveandindicatesap

18、otentialshockhazardwhichmustbecorrectedbeforereturningthe unittotheowner. 3 RadioFans.CN 收音机爱 好者资料库 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 D

19、eviation, 500mV 4 High 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 5 FRONT-PANEL CONTROLS 6 FRONT-PANEL CONTROLSFRONT-PANEL CONTROLS

20、21 MEMORYPRESET SLEEP AUTOMUTET-MONTUNEDST 79!#% press it again to turn the unit off.The Power 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 i

21、n amber when the unit is in the Standby mode to signal that the unit is ready to be turned on.When the unit is turned on, the indicator will briefly turn red, and then change to green.A red indicator during normal operation means that the unit is in the Protect mode, and should be turned off and the

22、n checked for a possible speaker-wire short circuit. 4 Headphone Jack: This jack may be used to listen to the HK 3375s output through a pair of headphones. Be certain that the headphones have a standard 14 stereo phone plug. 5 Mute: Press this button to momentarily silence the speaker output of the

23、HK 3375. 6 Speaker 1 Button: Press this button to turn the speakers connected to the Speaker 1Output Terminals on or off. 7 Speaker 2 Button: Press this button to turn the speakers connected to the Speaker 2Output Terminals on or off. 8 Phono Input Selector: Press this button to select the output of

24、 a turntable that is connected to the Phono Inputs. 9 T-Mon Input Selector: Press this button to listen to the output of a tape recorder connected to the Tape Monitor Inputs. The T-Mon Indicator I will light to indicate that the input source is being monitored when the HK 3375 is connected to a thre

25、e-head tape deck or another unit with off-head playback. ) Tuning Button: Press the left side of the button to tune lower-frequency stations and the right side of the button to tune higher-frequency stations.When a station with a strong signal is tuned, the TUNED Indicator F 6 FRONT-PANEL CONTROLS 7

26、 FRONT-PANEL CONTROLS will light in the Information Display .A brief (1/2- second) press of the button will manually tune to the next frequency increment, while pressing and holding the button for a longer period will automatically tune to the next station with a signal strong enough for acceptable

27、reception. ! Tape Input Selector: Press this button to listen to the output of a tape recorder or other device connected to the Tape 2 Inputs . Preset Scan: Press this button to automatically scan through the stations that have been programmed in the HK 3375s memory.The tuner will play five sec- ond

28、s of each station before moving to the next preset station.To stop the scan when the desired station is heard, press the button again. If no preset stations have been programmed into the HK 3375s memory,the message 0 PRESET will flash in the Information Display when this button is pressed. (See page

29、 15 for 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 CD Inputs . $ Aux Input Selector: Press this button to listen to the output of a device connected to the Aux Inputs . % Preset Selector: Press this but

30、ton to step up or down through the list of stations that has been entered into the preset memory. If no preset stations have been programmed into the HK 3375s memory, the message 0 PRESET will flash in the Information Display when this button is pressed. (See page15 for more information on tuner pro

31、gramming.) Dimmer Button: Press this button to dim the front-panel displays and indicators.The first press of the button will dim the displays to one-half normal brightness; the next press will turn all displays off except for the Power Indicator 3 and the Speaker Selection Indicators .When the pane

32、l 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.We recommend that you do not turn the Volume Control past the “12 oclock” position, at which point the audio signal will beg

33、in to distort. Such distortion, although inaudible, is capable of damaging your hearing and your equipment.When the unit has been 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 the recei

34、ver. 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 6 or Speaker 2 7 selectors to activate either pair of speakers. Remote Sensor Window: The sensor behind this window receives infrar

35、ed 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 7 FRONT-PANEL INFORMATION DISPLAY REAR-PANEL INFORMATION DISPLAY 8 MEMORYPRESET SLEEP AUTOMUTE

36、T-MONTUNEDST ABDEFHIJCG A Preset Number/Sleep Timer B Preset Indicator C Sleep Indicator D Memory Indicator E Stereo Indicator F Tuned Indicator G Auto Indicator H Main Information Display I Tape Monitor (T-Mon) Indicator J Mute Indicator A Preset Number/Sleep Timer: When the tuner is in use, these

37、numbers indicate the specific preset memory location in use. (See page 15 for more infor- mation on preset stations.) When the Sleep function is in use, these numbers show how many minutes remain before the unit goes into the Standby mode. B Preset Indicator: This indicator lights when the tuner is

38、in use to show that the Preset Number/ Sleep Timer A is showing the stations preset memory number. (See page 15 for more information on tuner presets.) C Sleep Indicator: This indicator lights when the Sleep function is in use.The numbers in the Preset Number/Sleep Timer Indicators will show the min

39、utes remaining before the HK 3375 goes into the Standby mode. (See page 14 for more information on the Sleep function.) DMemory Indicator: This indicator flashes when entering presets and other information into the tuners memory. E Stereo Indicator: This indicator lights when an FM station is being

40、tuned in stereo. FTuned Indicator:This indicator lights when a sta- tion is being received with sufficient signal strength to provide acceptable listening quality. G Auto Indicator: This indicator lights when the tuners Auto mode is in use. H Main Information Display: This display shows messages rel

41、ating to the status, input source, tuner or other aspects of the HK 3375s operation. I Tape Monitor (T-Mon) Indicator: When used with three-head cassette decks, or other recording devices that offer immediate playback of the recording as it is being made, the HK 3375 allows you to moni- tor a record

42、ing rather than merely listening to the input source, or waiting until the recording session is com- plete in order to hear the recording. Press the Tape Monitor Input Selector 9, and the T-Mon Indicator I will light to remind you that you are monitoring the recording. Press the Tape Monitor Input S

43、elector 9 again to hear the input source. J Mute Indicator: This indicator lights to remind you that the HK 3375s output has been silenced by pressing the Mute button 5 . Press the Mute button again to return to the previously selected output level. 8 REAR-PANEL CONNECTIONS 9 REAR-PANEL CONNECTIONS

44、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 M

45、onitor 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 AM Antenna: Connect the AM loop antenna sup- plied with the receiver to these terminals.

46、If an external AM antenna is used, make connections to the AM and GND terminals in accordance with the instructions sup- plied 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 sy

47、stem hum. Remote IR In: If the HK 3375s 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

48、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 tonearm to these jacks. Only Moving Magnet (MM)-type cartridges may be used. CD Inputs: Connect these jacks to the output of a compact disc player o

49、r 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