HarmanKardon-AVR125-avr-sm维修电路原理图.pdf

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1、 harman/kardon AVR125 AVR125 A/V DOLBY DIGITAL RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 BASIC SPECIFICATIONS.4 FRONT PANEL CONTROLS.5 FRONT PANEL DISPLAY.7 REAR PANEL CONNECTIONS.9 REMOTE CONTROL FUNCTIONS.11 INSTALLATION AND CONNECTIONS.14 TROUBLESHOOTING GUIDE.16 MICROPROCE

2、SSOR RESET.16 UNIT EXPLODED VIEW.17 DISASSEMBLY PROCEDURE.18 AMPLIFIER BIAS ADJUSTMENT.21 BLOCK DIAGRAM.22 IC PINOUTS.23 TRANSISTOR PINOUTS.52 ELECTRICAL PARTS LIST.53 PCB DRAWINGS.62 SCHEMATICS.70 WIRING DIAGRAM.82 PACKAGING.83 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev

3、5 2/2005 www.freeservicemanuals.infoIts Free www.freeservicemanuals.info 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

4、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 befo

5、re 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 se

6、miconductor 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 touchi

7、ng 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 o

8、n 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

9、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. (

10、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 ci

11、rcuit 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 clothe

12、s fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES devices. CAUTION : AVR125AVR125 harman/kardon harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 2 SAFETY PRECAUTIONS The following

13、 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 applian

14、ce (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. ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE O

15、F A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. Device under test Test all exposed metal surfaces Also 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 AV

16、R125AVR125 harman/kardon harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 TECHNICAL SPECIFICATIONS 4 Audio Section Stereo Mode Continuous Average Power (FTC) 55 Watts per channel, 0.07% THD, 20Hz 20kHz, both channels driven into 8 ohms Five-Channe

17、l Surround Modes Power Per Individual Channel Front L press it again to turn the unit off. Note that the Power Indicator 3 surrounding the switch will turn green when the unit is on. 3 Power Indicator: This LED will be illuminated in amber when the unit is in the Standby mode to signal that the unit

18、 is ready to be turned on.When the unit is in operation, the indicator will turn green. Should the indicator turn red, turn the unit off using the Main Power Switch 1 and check the speaker wire con- nections to make certain that there are no short circuits. 4 Headphone Jack: This jack may be used to

19、 listen to the AVR 125s output through a pair of headphones. Be certain that the headphones have a standard 1/4 stereo phone plug.The speakers will automatically be turned off when the headphone jack is in use. 5 Selector Buttons: When you are establishing the AVR 125s configuration settings,use the

20、se buttons to select from the choices available,as shown in the Main Information Display . 6 Tone Mode: Pressing this button enables or dis- ables the Bass and Treble tone controls.When the button is pressed so that the words TONE IN appear in the Main Information Display , the settings of the Bass

21、VMAx N appears when the Near Field VMAx mode is selected. (See page 22 for a description of the VMAx modes.) I Logic 7 Mode Indicators: These indicators light when the Logic 7 mode is in use. LOGIC 7C ap- pears for the Cinema version of Logic 7; LOGIC 7M appears for the Music version of Logic 7. (Se

22、e page 22 for a description of the Logic 7 modes.) J Preset Number/Sleep Timer: When the tuner is in use, these numbers indicate the specific preset memory location in use. (See page 25 for more infor- mation on preset stations.) When the Sleep function is in use, these numbers show how many minutes

23、 remain before the unit goes into the Standby mode. (See page 21 for information on the Sleep Function.) K Night Mode Indicator: This indicator lights when the AVR 125 is in the Night mode, which preserves the dynamic range of digital program material at low volume levels.This mode is only available

24、 with specially encoded Dolby Digital sources. (See page 24 for a description of the Night Mode.) L Speaker/Channel Input Indicators: These indica- tors are multipurpose, indicating either the speaker type selected for each channel or the incoming data-signal configuration.The left, center, right, r

25、ight surround and left surround speaker indicators are composed of three boxes, while the subwoofer is a single box.The center box lights when a “small” speaker is selected, and the two outer boxes light when “large” speakers are select- ed.When none of the boxes are lit for the center, sur- round o

26、r subwoofer channels, no speaker has been assigned to one of those positions. (See page 17 for more information on configuring speakers.) The letters inside each of the center boxes display active input channels. For standard analog inputs, only the L and R will light, indicating a stereo input.When

27、 a digital source is playing, the indicators will light to display the channels being received at the digital input.When the letters flash, the digital input has been interrupted. (See pages 1819 for more information on the Channel Indicators.) M Preset Indicator: This indicator lights when the tune

28、r is in use to show that the Preset Number/ Sleep Timer J is showing the stations preset memory number. (See page 25 for more information on tuner presets.) N Sleep Indicator: This indicator lights when the Sleep function is in use.The numbers in the Preset Number/Sleep Timer Indicators will show th

29、e minutes AVR125AVR125 harman/kardon harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 8FRONT-PANEL INFORMATION DISPLAY FRONT-PANEL INFORMATION DISPLAY remaining before the AVR 125 goes into the Standby mode. (See page 21 for more information.) OMe

30、mory Indicator: This indicator flashes when entering presets and other information into the tuners memory. P Stereo Indicator: This indicator lights when an FM station is being tuned in stereo. QTuned Indicator:This indicator lights when a station is being received with sufficient signal strength to

31、 pro- vide acceptable listening quality. R Auto Indicator: This indicator lights when the tuners Auto mode is in use. S Analog Input Indicator: This indicator lights when an analog input source has been selected. T Coaxial Digital Input Indicators: These indicators light to show when a Coaxial Digit

32、al Input has been selected. U Optical Digital Input Indicators: These indicators light to show when an Optical Digital Input has been selected. NOTE: See page 23 for information on assigning either an analog input or one of the digital inputs to the source currently in use. AVR125AVR125 harman/kardo

33、n harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 REAR-PANEL CONNECTIONS 9 REAR-PANEL CONNECTIONS fi fl b c d e f g j k h i a 3133 32 SURRSURR , 1A , 0.5A AM Antenna FM Antenna CD Inputs Tape Outputs Tape Inputs Subwoofer Output Front Speaker Out

34、puts Surround Speaker Outputs Front Speaker Outputs Surround Speaker Outputs Front Speaker Outputs Switched AC Accessory Outlet Unswitched AC Accessory Outlet AC Power Cord fi Optical Digital Output fl Coaxial Digital Output Video Monitor S-Video Output DVD S-Video Input Coaxial Digital Inputs a Vid

35、eo 1 S-Video Input b Video 1 S-Video Output c Optical Digital Inputs d Video 2 S-Video Input e 6-Channel Direct Inputs f Video Monitor Composite Video Output g DVD Composite Video Input h DVD Audio Inputs i Video 1 Composite Video Input j Video 1 Audio Inputs k Video 1 Composite Video Output Video 1

36、 Audio Outputs Video 2 Composite Video Input Video 2 Audio Inputs 33 32 31 AMAntenna: Connect theAM loop antenna sup- plied with the receiver to these terminals.If an external AM antenna is used,make connections to the AM and GND terminals in accordance with the instructions sup- plied with the ante

37、nna. FM Antenna: Connect the supplied indoor or an optional external FM antenna to this terminal. CD Inputs: Connect these jacks to the output of a compact disc player or CD changer. Tape Outputs: Connect these jacks to the RECORD/INPUT jacks of an audio recorder. Tape Inputs: Connect these jacks to

38、 the PLAY/OUT jacks of an audio recorder. Subwoofer Output: Connect this jack to the line- level input of a powered subwoofer. If an external sub- woofer amplifier is used, connect this jack to the sub- woofer amplifier input. Front Speaker Outputs: Connect these outputs to the matching + or termina

39、ls on your front speakers.When making speaker connections, always make certain to maintain correct polarity by connecting the black terminal to the negative () terminal on the speakers. Connect the white terminal to the positive (+) terminal on the left front speaker, the red terminal to the positiv

40、e (+) terminal on the right front speaker and the green terminal to the positive (+) terminal on the center front speaker. Newer speakers may have matching color terminals in accordance with the new CEA specifications, while existing speakers typically use a red terminal for the positive (+) speaker

41、 wire connection. (See page 14 for more information on speaker polarity.) Surround Speaker Outputs: Connect these outputs to the matching + or terminals on your left and right surround speakers.When making speaker connections always make certain to maintain correct polarity by connecting the black t

42、erminal to the nega- tive () terminal on the speakers. Connect the blue terminal to the positive (+) terminal on the left sur- round speaker and the gray terminal to the positive (+) terminal on the right surround speaker. Newer speakers may have matching color terminals in accor- dance with the new

43、 CEA specifications, while existing speakers typically use a red terminal for the positive (+) speaker wire connection. (See page 14 for more information on speaker polarity.) AVR125AVR125 harman/kardon harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好

44、者资料库 10REAR-PANEL CONNECTIONS REAR-PANEL CONNECTIONS Switched AC Accessory Outlet: This outlet may be used to power any device you wish to have turned on or off at the same time as the AVR 125.Any device connected to this outlet will be off when the AVR 125 is in the Standby mode, and power will be

45、supplied to the outlet when the AVR 125 is turned on. Unswitched AC Accessory Outlet: This outlet may be used to power any AC device.The power will remain on at this outlet regardless of whether the AVR 125 is on or off. IMPORTANT NOTE: The total power consumption of all devices connected to the acc

46、essory outlets should not exceed 100 watts. Do not connect power amplifiers or other high-current draw devices to these outlets. AC Power Cord: Connect the AC plug to an unswitched AC wall outlet. fi Optical Digital Output: Connect this jack to the matching digital audio input connector on a digital

47、 recorder such as a CD-R or MiniDisc recorder. fl Coaxial Digital Output: Connect this jack to the matching digital audio input connector on a digital recorder such as a CD-R or MiniDisc recorder. f Video Monitor Outputs: Connect these jacks to the composite or S-Video input of a TV monitor or video

48、 projector to view the output of any standard video source selected by the receivers video switcher. g DVD Video Inputs: Connect one of these jacks to the composite or S-Video output jacks on a DVD or other video source. Coaxial Digital Inputs: Connect the coax digital audio output from a DVD player

49、,HDTV receiver,LD player,satellite receiver,cable box,MiniDisc recorder or CD player to these jacks.The signal may be either a Dolby Digital signal,DTS signal or a standard PCM digital source.Do not connect the RF digital output of an LD player to these jacks. ai Video 1 Video Inputs: Connect one of these jacks to the PLAY/OUT composite or S-Video jacks on a VCR or other video source. bk Video 1 Video Outputs: