HarmanKardon-AVR225-avr-sm维修电路原理图.pdf

harman/kardon AVR225 AVR225 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 MICROPROCESSOR RESET.16 UNIT EXPLODED VIEW.17 DISASSEMBLY PROCEDURE.18 AMPLIFIER BIAS ADJUSTMENT.21 TECH TIP HKTT2004-03.22 TECH TIP HKTT2003-01.26 BLOCK DIAGRAM.27 IC PINOUTS.28 TRANSISTOR PINOUTS.64 ELECTRICAL PARTS LIST.65 PCB DRAWINGS.75 SCHEMATICS.83 WIRING DIAGRAM.95 PACKAGING.96 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev5 8/2005 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 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 : AVR225AVR225 harman/kardon harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info 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 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 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 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 AVR225AVR225 harman/kardon harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 Audio Section Stereo Mode Continuous Average Power (FTC) 70 Watts per channel, < 0.07% THD, 20Hz 20kHz, both channels driven into 8 ohms Five-Channel 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 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 connections to make certain that there are no short circuits. 4 Headphone Jack: This jack may be used to listen to the AVR 225s output through a pair of headphones. Be certain that the headphones have a standard 1/4 stereo phone plug. Note that the main room speakers will automatically be turned off when the headphone jack is in use. 5 Selector Buttons: When you are establishing the AVR 225s configuration settings,use these 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 VMAx N appears when the Near Field VMAx mode is selected. (See page 25 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 appears for the Cinema version; LOGIC 7M appears for the Music version of Logic 7. (See page 25 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 28 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. (See page 24 for information on the Sleep function.) K Night Mode Indicator: This lights when the AVR 225 is in the Night mode, which preserves the dynamic range of digital program material at low vol- ume levels.This mode is only available with specially encoded Dolby Digital sources. (See page 27 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, right 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 selected.When none of the boxes are lit for the center, surround or subwoofer channels, no speaker has been assigned to one of those positions. (See page 19 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 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 page 27 for more information on the Channel Indicators.) M Preset Indicator: This indicator lights when the tuner is in use to show that the Preset Number/ Sleep Timer J is showing the stations preset memory number. (See page 28 for more information on tuner presets.) AVR225AVR225 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 N Sleep Indicator: This indicator lights when the Sleep function is in use.The numbers in the Preset Number/Sleep Timer J will show the minutes remaining before the AVR 225 goes into the Standby mode. (See page 24 for more information on the Sleep function.) OMemory 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.This indicator differs from the indicator that lights when the surround decoding modes are turned off, which is described above as the Dolby 3 Stereo/Stereo Indicator E. QTuned Indicator:This indicator lights when a station is being received with sufficient signal strength to pro- vide acceptable listening quality. R Auto Indicator: This indicator lights when the tuners Auto mode is in use. S Main Information Display: This display shows messages relating to the status, input source, surround mode, tuner, volume level or other aspects of the AVR 225s operation. T Analog Input Indicator: This indicator lights when an analog input source has been selected. U Coaxial Digital Input Indicators: These indicators light to show when a coaxial digital audio input has been selected. V Optical Digital Input Indicators: These indicators light to show when an optical digital audio input has been selected. NOTE: See page 26 for information on assigning either an analog input or one of the digital audio inputs to the source currently in use. AVR225AVR225 harman/kardon 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 a b c df g h i j k 38 39 40 413137 36 35 34 33 32 fl e SURRSURR , 0.5A , 1A AM Antenna FM Antenna CD Inputs Tape Outputs Tape Inputs Remote IR Input Remote IR Output Subwoofer Output Front Right Speaker Outputs Surround Right Speaker Outputs Center Speaker Outputs Surround Left Speaker Outputs Front Left Speaker Outputs Switched AC Accessory Outlet fi Unswitched AC Accessory Outlet fl AC Power Cord Optical Digital Audio Output Coaxial Digital Audio Output Video Monitor S-Video Output a DVD S-Video Input b Coaxial Digital Audio Inputs c Video 1 S-Video Input d Video 1 S-Video Output e Optical Digital Audio Inputs f Video 2 S-Video Input g Video 2 S-Video Output h Video 3 S-Video Input i 6-Channel Direct Inputs j Video Monitor Composite Video Output k DVD Composite Video Input DVD Audio Inputs Video 1 Composite Video Input Video 1 Audio Inputs Video 1 Composite Video Output Video 1 Audio Outputs Video 2 Composite Video Input Video 2 Audio Inputs Video 2 Composite Video Output Video 2 Audio Outputs Video 3 Composite Video Input Video 3 Audio Inputs 41 40 39 38 37 36 35 34 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 supplied with the antenna. 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 the PLAY/OUT jacks of an audio recorder. Remote IR Input: If the AVR 225s 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 Output: 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. 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 terminals 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 positive (+) 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 AVR225AVR225 harman/kardon harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 10REAR-PANEL CONNECTIONS REAR-PANEL CONNECTIONS 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.) 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 terminal 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 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.) 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 225.Any device connected to this outlet will be off when the AVR 225 is in the Standby mode, and power will be supplied to the outlet when the AVR 225 is turned on. fi 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 225 is on or off. NOTE: The total power consumption of all devices connected to the accessory outlets should not exceed 100 watts. Do not connect power amplifiers or other high-current draw devices to these outlets. fl AC Power Cord: Connect the AC plug to an unswitched AC wall outlet. Optical Digital Audio Output: Connect this jack to the matching digital