McIntosh-MHT200-avs-sm 维修电路原理图.pdf
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1、SERVICE MANUALPerformance Specifications . 2 - 3Notes . 3Rear Panel . 4Section Location . 4Block Diagram . 5 - 7Interconnection Diagram . 8 - 10Display Schematic and PCB . 11 - 18Keyboard Schematic and PCB .13, 17 - 18Bottom Schematic and PCB. 19 - 24Power Supply Schematic and PCB. 25 - 28Data2 Sche
2、matic and PCB. 29 - 32Data1 Schematic and PCB. 33 - 36Digital Schematic and PCB . 37 - 40S-Video Schematic and PCB. 41 - 52Composite Video Schematic and PCB . 53 - 58Main Audio Schematic and PCB . 59 - 74Multi Channel Schematic and PCB. 75 - 86Amplifier Schematic and PCB. 89 - 104Tuner AM/FM Alignme
3、nt Procedure. 105 - 106Tuner/RAA1 Schematic and PCB . 107 - 110DSP Module PCB. 111Backup Power Supply . 112Exploded Views and Parts Lists . 113 - 114Repacking Instruction . 115CONTENTSA/V SYSTEM CONTROLLERRadioFans.CN 收音机爱 好者资料库PERFORMANCE SPECIFICATIONS2Preamplifier and Processor SpecificationsFreq
4、uency ResponseStereo:Left and Right Loudspeakers: +0-0.5dB from 20Hz-20,000HzMusic 1-4:Left, Center, Right Loudspeakers: +0-0.5dB from 20Hz-20,000HzLarge Surround Loudspeakers: +0-0.5dB from 20Hz-20,000HzPro-Logic:Left, Center, Right, Large Loudspeakers: +/-0.5dB from20Hz-20,000HzLarge Surround Loud
5、speakers: +1-3dB from 20Hz-6.3kHzSubwoofer1: 20Hz-140HzDolby Digital, DTS and External Input:Left, Center, Right Large Loudspeakers: +/-0.5dB from 20Hz-20,000HzLarge Surround Loudspeakers: +/-0.5dB from 20Hz-20,000HzSubwoofer1: 20Hz-140HzRated Output2V for all channelsInput Impedance22k ohmsOutput I
6、mpedanceLess than 560 ohms for all channelsMaximum Output Voltage8VTotal Harmonic Distortion0.05% for all channelsSensitivityAnalog Input: 100mV IHFDolby Level: 200mV InputExternal Input: 200mV for 2.0V OutputSignal To Noise RatioGreater than 90dB A-weightedMaximum Input SignalAnalog Input: 6VrmsTon
7、e Controls+/-12dB from the flat setting1 If any of the channels have the Loudspeaker Setting of Small, thesubwoofer has a electronic low pass filter with a corner frequency of80Hz and a 24dB per Octave roll-off in all modes except external.The Frequency Response of the Subwoofer Channel is alsodeter
8、mined by the Crossover Setting.Power Amplifier SpecificationsPower OutputMinimum sine wave continuous average power output perchannel, all channels operating is: 100 watts into 4 ohm load, 70watts into a 8 ohm loadRated Power Band20Hz to 20,000HzTotal Harmonic DistortionMaximum Total Harmonic Distor
9、tion at any power level from250 milliwatts to rated power output is: 0.05% for 4 or 8 ohmloadDynamic Headroom1.8dBFrequency Response+0, -0.25dB from 20Hz to 20,000Hz+0, -3dB from 10Hz to 1000,000HzSensitivity1.0 VoltA-Weighted Signal To Noise Ratio92dB (112dB below rated output)Intermodulation Disto
10、rtionMaximum Intermodulation Distortion if instantaneous peakoutput per channel does not exceed twice the rated output, forany combination of frequencies from 20Hz to 20,000Hz, with allchannels operating is: 0.05% for 4 or 8 ohm loadsInput Impedance20,000 ohmsWide Band Damping Factor100 at 4 ohms200
11、 at 8 ohmsGeneral SpecificationsPower Requirements100 Volts, 50/60Hz at 8.4 Amps110 Volts, 50/60Hz at 7.7 Amps120 Volts, 50/60Hz at 7.0 Amps220 Volts, 50/60Hz at 3.5 Amps230 Volts, 50/60Hz at 3.5 Amps240 Volts, 50/60Hz at 3.5 AmpsNote: Refer to rear panel of the MHT200 for the correct voltage.Dimens
12、ionsFront Panel: 17-3/4 inches (45.09cm) wide, 9-7/16 inches(23.97cm) high. Depth behind front mounting panel is 19 inches(48.26cm) including clearance for connectors. Panel clearancerequired in front of mounting panel is 1-1/8 inches (2.9cm).Weight73 pounds (33.1kg) net, 87 pounds (39.5kg) shipping
13、RadioFans.CN 收音机爱 好者资料库31. The heavy lines on the schematic denote the primarysignal path.2. Unless otherwise noted, all voltages indicated on theschematics are measured under the following conditions:a. AC input at 120 volts, 50/60Hz.b. All voltages are +/-10% with respect to ground. A high impedan
14、ce (10 megaohm) voltmeter must be used.4.On PC board drawings, Square pad indicates:a. Polarized Capacitors - Positiveb. Diodes - Cathodec. Others - Pin 15.WARNINGParts marked with the symbol have criticalcharacteristics. Use only replacement parts recom-mended by the manufacturer.NOTESFM TunerUseab
15、le Sensitivity14dBF which is 1.4uV across 75 ohms50dB Quieting SensitivityMono: 19dBF which is 2.4uV across 75 ohmsStereo: 35dBF which is 15uV across 75 ohmsSignal To Noise RatioMono: 75dBStereo: 70dBFrequency ResponseMono: +0, -1dB from 20Hz to 15,000HxStereo: +0, -1dB from 20Hz to 15,000HzHarmonic
16、 DistortionMono: 0.3% at 100Hz, 0.3% at 1,000Hz, 0.3% at 10,000HzStereo: 0.45% at 100Hz, 0.45% at 1,000Hz, 0.65% at 10,000HzIntermodulation DistortionMono: 0.25%Stereo: 0.45%Capture Ratio1.2dBAlternate Channel Selectivity75dBSpurious Response100dBImage Response75dBRF Intermodulation65dBStereo Separa
17、tion45dB at 100Hz45dB at 1,000Hz35dB at 10,000HzSCA Rejection65dBAM TunerSensitivity20uV External Antenna InputSignal To Noise Ratio48dB at 30% modulation58dB at 100% modulationHarmonic Distortion0.5% maximum at 50% modulationFrequency Response50Hz to 6kHz NRSCAdjacent Channel Selectivity45dB minimu
18、m IHFImage Rejection65dB minimum from 540Hz to 1,600kHzIF Rejection80dB minimumPERFORMANCE SPECIFICATIONS contMHT200REAR PANELSECTION LOCATIONS49COMPOSITEVIDEO PCB6DATA1PCB13TUNERTM1(OPTIONAL)5DATA2PCB3BOTTOMPCB4POWER SUPPLYPCB2BKEYBOARDPCB7DIGITALPCB8S-VIDEOPCB10MAINPCB12BAMPPCB (BACK)12AAMPPCB (FR
19、ONT)2ADISPLAYPCB11MULTICHANNELPCB15DSPMODULE16BACKUPPOWER SUPPLYPCB14RAA1RAA1141516SEE INTERCONNECTTOP VIEW WITH COVER REMOVED576BLOCK DIAGRAMMHT200AUDIOBUFFERSLEFTLISTENANDRECORDINPUTSWITCHINGTAPELEFTANDRIGHTOUTPUTSWITCHINGAUDIOBUFFERSAUXCD1DVDTUNERVCR1VCR2AUXCD1DVDTUNERTVVCR1VCR2RIGHTLISTENANDRECO
20、RDINPUTSWITCHINGTIMEDELAYS/PDIFRECEIVERBITSTREAMSELECTORCROSSOVERFILTERSLEFTINPUTBUFFERCENTERINPUTBUFFERRIGHTINPUTBUFFERL SURINPUTBUFFERR SURINPUTBUFFERLCRSUBEXT PROCESSORINPUTCONTROLMICROL SURVOLUMER SURVOLUMESUBVOLUMERIGHTVOLUMECENTERVOLUMELEFTVOLUMEANALOG SWITCHINGDIGITALINPUTSWITCHINGABCDEFCOAXD
21、RIVEROPTICALDRIVERTVLEFTCHANNELVCR1VCR2VCR1VCR2RIGHTCHANNELCONVERTERCONVERTERCONVERTERA (COAX)B (COAX)C (COAX)D (OPTICAL)E (OPTICAL)F (OPTICAL)AUXCDSATTVDVDVCR12 CHA/DRLANALOGINPUTSOPTICALCOAXDIGITALOUTPUTSIRMICROFRONT PANEL SENSORZONE BIR DATAZONE AIR DATACONTROL LOGICDSPMODULE CONTROLRS232FRONT PA
22、NELPUSHBUTTONSFRONT PANELROTARY SWITCHESFRONT PANELVOLUMETUNERCONTROLZONE BVOLUME CONTROLFRONT PANELDISPLAYSINPUTSWITCHINGPOWERCONTROLCONTROLMICROEIGHT CHANNELVOLUME/TONECONTROLCONTROLMICRODATADRIVERSTUNERAUXCD1CD2TAPE1TAPE2SATTVLVVCR1VCR2DVDZONE ADATA DECODERZONE BDATA DECODERDD / DTS /PRO LOGIC II
23、 DECODERL BSURINPUTBUFFERR BSURINPUTBUFFERSLSRBSLBSRBSLVOLUMEBSRVOLUMECD2TUNERTAPE1AUXTVLVVCR1DVDZONE AZONE BSUM A+BSUBWOOFINPUTBUFFEROUTPUTMUTINGOUTPUTMUTINGOUTPUTMUTINGOUTPUTMUTINGOUTPUTMUTINGOUTPUTMUTINGLEFTFRONTCENTERRIGHTFRONTSUBWOOFEROUTPUTMUTINGOUTPUTMUTINGLEFT BACKSURROUNDRIGHT BACKSURROUNDZ
24、ONE A8 CHANNELOUTPUTLEFTSURROUNDRIGHTSURROUNDZB LEFTVOLUMEZB RIGHTVOLUMEOUTPUTMUTINGOUTPUTMUTINGLEFTRIGHTZBOUTPUTDSPEXTPROCESSOR SWITCHINGLCRSUB SLSR BSL BSRLCRSUB SLSR BSL BSRLCRSUBLSRSBSLBSR8 CHANNEL D/ADIFFAMPVOLUMEAMPPREDRIVERDRIVEROUTPUTPOWERGUARDGAINELECTRONICATTENUATORPGINDICATORDRIVERPGINDIC
25、ATORCURRENTSOURCEDCBIASDIFFAMPVOLUMEAMPPREDRIVERDRIVEROUTPUTNEGATIVECURRENTLIMITERPOSITIVECURRENTLIMITERNEGATIVEFEEDBACKDCSENSINGRELAYDRIVETURN ONDELAYOUTPUTRELAY1 INPUTONE CHANNEL SHOWNOUTPUTTUNEDCIRCUIT88 108MHzTUNEDCIRCUIT88 108MHzTUNEDCIRCUIT88 108MHzFMOSCILLATOR98 7 118 7 MHzLOCALOSCILLATORDOUB
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