HarmanKardon-HK3485-avr-sm电路图 维修手册.pdf

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1、harman/kardon HK3485 HK3485 STEREO RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 SPECIFICATIONS .4 PACKAGE.5 FRONT PANEL CONTROLS .6 REAR PANEL CONNECTIONS .9 REMOTE CONTROL FUNCTIONS .11 CONNECTIONS/INSTALLATION.13 OPERATION.19 TROUBLESHOOTING GUIDE.23 PROCESSOR RESET.23 DISASSEM

2、BLY PROCEDURES24 EXPLODED VIEW .25 AMPLIFIER BIAS ADJUSTMENT.26 BLOCK DIAGRAM.27 IC DESCRIPTIONS/PINOUTS28 ELECTRICAL PARTS LIST 42 PCB DRAWINGS.47 SCHEMATICS.49 WIRING DIAGRAM.51 harman/kardon, Inc. 250 Crossways Park Dr. Released 2007 Woodbury, New York 11797 Rev0 7/2007 Discontinued XXXX RadioFan

3、s.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 resistan

4、ce, 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

5、 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 redu

6、ce 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

7、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 bui

8、ld-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 fr

9、eon-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

10、 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 appli

11、ed 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 el

12、ectricity sufficient to damage an ES devices. CAUTION : HK3485 harman/kardonharman/kardon 2 RadioFans.CN 收音机爱 好者资料库 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

13、 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

14、 and turn the AC power switch on. Any current measured must not exceed o.5mA. 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. Device under test Test all exposed metal surfaces Also

15、test with plug reversed (Using AC adapter plug as required) AC Leakage Test Leakage current tester Reading should not be above 0.5mA Earth ground 3 HK3485 harman/kardonharman/kardon RadioFans.CN 收音机爱 好者资料库 HK 3485 TECHNICAL SPECIFICATIONS Audio Section Stereo Mode: Continuous Average Power (FTC): 12

16、0 Watts per channel, 20Hz 20kHz, 0.07% THD, both channels driven into 8 ohms 150 Watts per channel, 20Hz 20kHz 80dB IF Rejection:100dB Tuner Output Level:1kHz, 100kHz, Dev 500mV AM Tuner Section Frequency Range:520 1710kHz Signal-to-Noise Ratio:40dB Usable Sensitivity:Loop 500V/M Distortion:1kHz, 50

17、% Mod 0.8% Selectivity:10kHz, 25dB Video Section Television Format:NTSC/PAL/SECAM Signal Format:Composite Input Level:1Vp-p Input Impedance:75 Ohms, unbalanced Sync Polarity:Negative Output Level:1Vp-p Output Impedance:75 Ohms, unbalanced Video Frequency Response:10Hz 10MHz General Power Requirement

18、:AC 120V/60Hz Power Consumption:3W standby, 280W maximum (both channels driven) Dimensions:(Product)(Shipping) Width:17.4 (442mm)21.5 (545mm) Height:6.6 (168mm)9.9 (251mm) Depth:15 (382mm)17.9 (455mm) (Product)(Shipping) Weight:20.9 lb (9.5kg)25.1 lb (11.4kg) Depth measurement includes knobs, button

19、s and terminal connections. Height measurement includes feet and chassis. All features and specifications are subject to change without notice. Harman Kardon is a trademark of Harman International Industries, Incorporated, registered in the United States and/or other countries. Designed to Entertain

20、 is a trademark of Harman International Industries, Incorporated. CEA is a registered trademark of the Consumer Electronics Association. iPod is a trademark of Apple Inc., registered in the U.S. and other countries. HK 3485 OM 2/15/07 4:21 PM Page 26 4 HK3485 harman/kardonharman/kardon 5 FRONT-PANEL

21、 CONTROLS Power Switch:This electrical switch turns the receiver on for playback, or leaves it in Standby mode for quick turn-on using the remote control. Power Indicator:This LED has two modes.When power is turned off, the LED is amber to indicate that the receiver is plugged in and ready to be tur

22、ned on.When the receiver is turned on, the LED turns blue. Headphone Jack:Plug a 1/4 headphone plug into this jack for private listening. Mute:Press this button to mute the HK 3485s speaker and head- phone outputs temporarily.To end the muting, press this button or adjust the volume. Muting is also

23、canceled when the receiver is turned off. Speaker 1/2:Press the left side of this button to enable the HK 3485 to output audio to the speakers connected to the Speaker 1 Outputs, and press the right side of the button to enable the Speaker 2 Outputs.You may enable or disable both sets of speaker out

24、puts simul- taneously.This feature is a convenient way of hearing audio in more than one room at a time, although the same source material will be played through both sets of speakers. Tuning:Press either side of this button to tune a radio station.Tap the button briefly to tune one frequency step a

25、t a time, or press and hold the button to seek the next frequency with an acceptably strong signal. Preset Scan:Press this button once to scan through the stations you have previously programmed as presets. Each station will play for five seconds before the tuner skips to the next preset station. Pr

26、ess the button a second time to select the current station. If no presets have been programmed, the 0 PRESET message will be displayed. Preset Stations:Press this button to select a preset radio station. If no presets have been programmed, the 0 PRESET message will be displayed. Tuner Band:Press thi

27、s button to select the tuner as the source, or to select the AM (right side of button) or FM (left side of button) band. FM Mode:This button toggles between Stereo and Mono modes when an FM station is tuned. Mono mode may improve reception of weaker signals. Bass Control:Turn the knob clockwise to b

28、oost low-frequency output by up to 10dB, or counterclockwise to cut low-frequency output by up to 10dB. Set the control to suit your taste and room acoustics. Video 3,Analog Audio and Video Inputs:Connect a source component that will only be used temporarily to these jacks, such as a camera or game

29、console, or connect an iPod using the supplied audio/video cable. Balance Control:Turn the knob to adjust the relative volume of the left and right channels, which affects imaging and can compensate for room characteristics. Volume Control:Turn this knob to raise or lower the volume, which will be s

30、hown in decibels (dB) in the Message Display. Treble Control:Turn the knob clockwise to boost high-frequency output by up to 10dB, or counterclockwise to cut high-frequency output by up to 10dB. Set the control to suit your taste and room acoustics. Sleep:Press this button to activate the sleep time

31、r, which shuts off the receiver after a programmed period of time up to 90 minutes. Dimmer:Some people find the front-panel display distracting. Press this button once to dim the displays to half-brightness, and a second time to turn the displays completely off.The Power Indicator will always remain

32、 lit to remind you that the receiver is turned on. Press the button a third time to return the display to normal brightness.This setting is canceled when the unit is turned off. Message Display:Various messages appear in this display in response to commands. Video Source Selectors:Press any of these

33、 buttons to select the device connected to the corresponding Audio and Video Inputs for playback. Remember to turn on the source device, to connect the Video Monitor Output to your video display and to turn on your video display and select the correct Video Input. NOTE: The Video 3 source device may

34、 be connected to either the front- or rear-panel connectors.To select the desired device, press the Video 3 Source Selector repeatedly until the dot to the left of the Video 3 Indicator in the Message Display lights steadily (rear-panel connections selected) or flashes (front-panel connections selec

35、ted). CD Source Selector:Press this button to select the device connected to the CD Inputs as the source. Tape Source Selector:Press this button to select the device connected to the Tape/CDR Audio Inputs as the source. If you are making a recording using a three-head tape deck or another unit with

36、off-head playback, the dot to the left of the Tape Monitor Indicator in the Message Display will flash when the recording is being monitored. Phono Source Selector:Press this button to select a turntable connected to the Phono Inputs as the source. HK 3485 OM 2/15/07 4:20 PM Page 7 6 HK3485 harman/k

37、ardonharman/kardon MuteTuningPreset Stations Speaker 1/2 Preset ScanFM ModeTuner Band Bass Control Video 3 Video Input Video 3 Audio Inputs Power Indicator Headphone Jack Power Switch Volume Control CD Source Selector Tape Source Selector Phono Source Selector Video Source Selectors Message DisplayD

38、immer Sleep Treble Control Balance Control NOTE: To make it easier to follow the instructions throughout the manual that refer to this illustration, a copy of this page may be downloaded from the Product Support section at . HK 3485 OM 2/15/07 4:20 PM Page 8 7 HK3485 harman/kardonharman/kardon Speak

39、er 1/2:The dot to the left of the indicator for each speaker pair will light when that pair is active. Press the Speaker 1/2 Selectors to activate either or both pairs of speakers. Messages:This display shows messages relating to the status, input source, tuner or other aspects of the HK 3485s opera

40、tion. Preset Number/Sleep Timer:When the tuner is in use, these numbers indicate the specific preset memory location in use.When the Sleep function is in use, these numbers show how many minutes remain before the unit turns off. Source Inputs:The dot to the left of the name of the device that is cur

41、rently the source input for the HK 3485 will light. When the device connected to the Tape Monitor Inputs has been selected, the dot to the left of the Tape Monitor Input Indicator will flash to indicate that you are monitoring a recording being made on the device connected to the Tape Monitor Inputs

42、, if the recorder has off-head playback.The dot to the left of the Input Indicator for the last-selected source input will remain lit. Sleep Indicator:This indicator lights when the Sleep function is in use.The numbers in the Preset Number/Sleep Timer Indicators will show the minutes remaining befor

43、e the HK 3485 turns off. Preset Indicator:This indicator lights when the tuner is in use to show that the Preset Number/Sleep Timer is showing the stations preset memory number. Memory Indicator:This indicator flashes when entering presets and other information into the tuners memory. Stereo Indicat

44、or:This indicator lights when an FM station is being tuned in stereo. Tuned Indicator:This indicator lights when a station is being received with sufficient signal strength to provide acceptable listening quality. Auto Indicator:This indicator lights when the tuners Auto Stereo mode is in use. Mute

45、Indicator:This indicator flashes to remind you that the HK 3485s output has been silenced by pressing the Mute Button. Press the button again to end muting. FRONT-PANEL INFORMATION DISPLAY SPEAKER 2 SPEAKER 1PHONO CD FM VID 1 TAPE M. VID 2 PRESET AMVID 3 AUTOTUNEDSTEREOMUTE SLEEP MEMORY Speaker 1/2

46、MuteAutoTunedStereoMemory Preset Sleep MessagesPreset Number/ Sleep Timer Source Inputs NOTE: To make it easier to follow the instructions that refer to this illustration, a larger copy may be downloaded from the Product Support section for this product at . HK 3485 OM 2/15/07 4:20 PM Page 9 8 HK348

47、5 harman/kardonharman/kardon REAR-PANEL CONNECTIONS AM and FM Antenna Terminals:Connect the included AM and FM antennas to their respective terminals for radio reception. Video 1,Video 2 and Video 3 Audio/Video Inputs:These jacks may be used to connect your video-capable source components (e.g.,VCR,

48、 DVD player, cable TV box) to the receiver. NOTE: The Video 3 source has inputs on both the front and rear panels of the HK 3485, and you may connect different devices to each set of inputs.To select between the two sets of inputs, press the Video 3 Source Selector repeatedly. Observe the HK 3485s f

49、ront panel.When the dot next to the Video 3 Input Indicator lights steadily, the device connected to the rear panel has been selected.When the dot flashes, the device connected to the front panel has been selected. Video 1 Audio/Video Outputs:These jacks may be used to connect your VCR or another recorder. Video Monitor Output:If some of your sources use video connec- tions, then you will need to connect the Video Monitor Output to the corresponding input on your tele