McIntosh-MA6500-int-sm 维修电路原理图.pdf

SERVICE MANUALINTEGRATED AMPLIFIER1C D 2M O N OS PE AK ER SC D 12T U N ERM U T EV ID E OL O U DP H AU X/TA PEHE ADPH ON ESSE N SO RS TAN DB Y O N/V O LU M EP O W E R G U A R DL EF TR IG HTT R EB L EB A SSB A LA N C ELR202002.0.20.02POWER OUTPUT-40-30-20-100DECIB ELSWATTS400202002.0.20.02POWER OUTPUT-40-30-20-100DECIBELSWATTS400Performance Specifications . 2Notes . 3Rear Panel. 4Section Location . 4Block Diagram . 5 - 8Interconnection Diagram . 9 - 10Input Driver Schematic and PCB. 11 - 18Heatsink Schematic and PCB . 19 - 20Lamp Schematic and PCB . 19 - 20PG Display Schematic and PCB . 21 - 22Control Schematic and PCB . 21 - 22Tone Schematic and PCB . 23 - 26Parts List. 25 - 28Exploded View and Parts List. 29 - 31Repacking Instructions . 33CONTENTSRadioFans.CN 收音机爱 好者资料库PREFORMANCE SPECIFICATIONSPOWER OUTPUT, STEREO250, 200, 120 watts minimum sine wave continuousaverage power output per channel, both channels operat-ing, into a load impedance of 2, 4 and 8 ohms respec-tively.TOTAL HARMONIC DISTORTION0.005% maximum at any power level from 250 milliwattsto rated power per channel from 20Hz to 20,000Hz, bothchannels operating.INTERMODULATION DISTORTION0.005% maximum if instantaneous peak power output perchannel does not exceed twice the rated output with bothchannels operating for any combination of frequenciesfrom 20Hz to 20,000Hz.OUTPUT LOAD IMPEDANCE2, 4 or 8 ohmsRATED POWER BAND20Hz to 20,000HzDYNAMIC HEADROOM2.4dB at 2, 4 or 8 ohmsDAMPING FACTOR60 at 2 ohms120 at 4 ohms230 at 8 ohmsFREQUENCY RESPONSE+0, -0.5dB from 20Hz to 20,000HzSIGNAL TO NOISE RATIO, (A WEIGHTED)Phono Input: 90dB (84dB IHF) below 10mV inputHigh Level: 100db (90dB IHF) below rated outputPower Amplifier: 110dB below rated outputSENSITIVITYPhono: 2.5mV for 2.5V rated output (0.5mV IHF)High Level: 250mV for 2.5V rated output (50mV IHF)Power Amplifier Input: 2.5V for rated outputINPUT IMPEDANCEPhono: 47k ohms, 65pFHigh Level: 22k ohmsMAXIMUM INPUT SIGNALPhono: 90mVHigh Level: 8VPOWER REQUIREMENT120V, 50/60Hz, 5.0 Amps UL/CSA230V, 50/60Hz, 2.5 AmpsPREAMPLIFIER MAXIMUM VOLTAGE OUTPUTPhono: 90mV at tape outputHigh Level: 8V at tape outputMain Out: 8V at preamp outputVOLTAGE GAINHigh Level to Tape: 0dBHigh Level to Main: 20dBTONE CONTROLSBass Control: +/-12dB at 20HzTreble Control: +/-12dB at 10kHzPOWER REQUIREMENTS100 Volts, 50/60Hz at 4.8 Amps110 Volts, 50/60Hz at 4.4 Amps120 Volts, 50/60Hz at 4.0 Amps220 Volts, 50/60Hz at 2.0 Amps230 Volts, 50/60Hz at 2.0 Amps240 Volts, 50/60Hz at 2.0 AmpsNOTE: Refer to the rear panel of the MA6500 for the correct voltage.DIMENSIONS17-1/2 inches (44.5cm) wide by 7-1/16 inches (17.9cm)high. Depth behind front panel is 18-1/8 inches (46cm)including connectors. Knob clearance required in front ofthe mounting panel is 1-1/8 inches (2.9cm).2RadioFans.CN 收音机爱 好者资料库1. The heavy lines on the schematics denote the primarysignal path.2. Unless otherwise noted, all voltages indicated on theschematics are measured under the following condi-tions:a. AC input at 120 volts, 50/60Hzb. All voltages are +-10% with respect to ground. Ahigh impedance (10megaohm) voltmeter must beused.3. Unless otherwise specified:a. Resistors values are in ohms.b. Capacitor values are in microfarads (uF).c. Inductor values are in microhenries (uH).4. On PC Board Drawings, Square Pad Indicates:a. Polarized Capacitors - Positiveb. Diode - Cathodec. Others - Pin 15. The voltages enclosed in a box are signal voltages thatare measured with a 2.5mV, 1kHz signal connected toboth channels at the TUNER input jacks.NOTESMA6500Front panel controls are set at:BALANCE .CENTER DETENTTREBLE BASS .CENTER DETENTINPUT SELECTORS. TUNERLOUDNESS . OFFPOWER . ONVOLUME.FULLY CLOCKWISEMONO. OFFSPEAKER SWITCHES 1 AND 2. ONRear panel controls are set at:PROCESSOR .OUTPWR AMP INPUT . INTSPEAKER TERMINALS . NO LOAD ONOUTPUTS6. WARNING:Parts marked with the symbol have criticalcharacteristics. Use ONLY replacement parts recom-mended by the manufacturer.3REAR PANELSECTION LOCATIONS120V 50/60Hz 4AT 10A L 250VSLO BLOPO W ERCO NTROLVIDEOSUMTUNERHO MECD 2TAPEPO W ERAMP INPOW ERAMP INPUTMAINOUTTAPEO UTTAPEVIDEOCD 2CD 1G NDPH AUX/TUNERCD 1EXTPHINTAUXAUXEXT SENSORD ATA PORTSIN PU TSM A 6 5 0 0 IN T E G R AT E D A M P L IF IE RSERIALNUMBERMcINTOSH LABORATORY, INC., BINGHAMTON, NEW YORK MADE IN USALLLRRRRIGHTRIGHTLEFTLE FTW ARN IN GAVIS SHOCK HAZARD - D O NOT O PEN. FORCO NTINUED PRO TECTION AGAINST FIREHAZARDREPLACE ONLY W ITH SAME TYPE AND RATING FUS E.RISQ UE DE CHOC - ELECTRIQ UE - NE PASO UVRIR. REMPLAC ER PAR U N FUSIBLE DEME METYPE , AMPERAGE E T VOLTAG E. W AR N IN GAVIS RISK OF HAZA RDO US ENE RGY! MAK EPRO PER SPEAKER CONNEC TIONS.SEE OPER ATIN GM ANU AL BEFO R E U SIN G.ENERG IE ELECTRIQ U E DA NGERE USE! V OIR LECAH IER DINSTRU CTION. IN P UT/D R IVERPC B2H EAT SINKPC B3TO NEPC B74LAM PPC B65C O N T RO LPC BPG D ISPLAYPC B4BLOCK DIAGRAM56MA650020dBAMP20dBAMPSUPER TRACKINGVOLUME CONTROLSUPER TRACKINGVOLUME CONTROLMONOSWITCHINGLOUDNESSCOMPENSATIONCONTROLLOUDNESSCOMPENSATIONCONTROLMONOSWITCHING BALANCE CONTROL BALANCE CONTROLTONE AMPTONE AMPTURN-ONDELAYTONECONTROLSMATCHINGNETWORKINPUTELECTRO-MAGNETICSWITCHINGINPUTELECTRO-MAGNETICSWITCHINGINPUTELECTRO-MAGNETICSWITCHINGDATAPORTREGISTERMICROCONTROLLERINPUTSELECTORLOGICIRSENSORR IAAAMPR IAAAMPOUTPUTMUTINGOUTPUTMUTINGHEAD-PHONE AMPHEAD-PHONE AMPAUXTUNERVIDEOTAPECD1CD2TUNERVIDEOAUXTAPEPHONOPHONOAUXTUNERSUMCD1CD2VIDEOTAPEHOMEOUTPUTMUTINGLOGICHEADPHONERIGHTCHANNELINPUTSDATAPORTSCD1CD2LEFTCHANNELINPUTSPOWERCONTROLEXT IRSENSORTO PREAMP IN (INT)PREAMP OUT LEFTTO PREAMP IN (INT)PREAMP OUT RIGHTPOWERTRANSFORMERRECTIFIERSAND FILTERSLAMPFUSEFRONT PANELLAMPSMAINRELAYSMAINSUPPLY-15VREGULATOR15VREGULATOR5.6VREGULATORLAMP CONTROLLOGICB-B+11.5VAC-15V15V5.6VTHERMALPROTECTION120VAC50/60HzMAINFUSEIN RUSHCURRENTLIMITERBLOCK DIAGRAM78NEGATIVECURRENTLIMITERPOSITIVECURRENTLIMITERCURRENTSOURCE PREDRIVERPOWERGUARD DRIVER OUTPUTDCBIAS PREDRIVER DRIVER OUTPUTELECTRONICATTENUATORLEFT PG INDICATORNEGATIVEFEEDBACKVOLTAGELOGAMPPOSITIVECURRENTLIMITER OUTPUT DRIVER PREDRIVERDCBIASCURRENTSOURCE PREDRIVER DRIVER OUTPUTPG INDICATORDRIVER POWER AMPINPUTSWITCHNEGATIVECURRENTLIMITERVOLTAGELOGAMPNEGATIVEFEEDBACKDIFFAMPCASCODE VOLTAGEAMPCASCODE VOLTAGEAMPCASCODE VOLTAGEAMPDIFFAMPDIFFAMPDIFFAMPPOWERGUARD PG DRIVER RIGHT PG INDICATORELECTRONICATTENUATORPOWER AMPINPUTSWITCHTO PRE AMPOUT (INT)PRE AMP IN(EXT)TO PRE AMPOUT (INT)CASCODE VOLTAGEAMPRECTIFIERRECTIFIERDCAMPDCAMP+-+LEFTMETERRIGHTMETERSPEAKERSWITCHINGTURN ONDELAYTHERMALPROTECTIONSPEAKERSWITCHINGSPEAKER 2SPEAKER 1LEFTOUTPUTSPEAKER 2SPEAKER 1RIGHTOUTPUTPRE AMP IN(EXT)TO MICRO CONTROLLORPRE AMP LEFT(INT)PRE AMP RIGHT(INT)INTERCONNECT9100MA6500INPUT DRIVER 049193 SH 1 OF 311122INPUT DRIVER 049193 SH 2 OF 31314MA65002INPUT DRIVER 049193 SH 3 OF 315162INPUT DRIVER1718MA65002HEATSINK 049194LAMP 04923519203A3B4B4ACONTROL 049195PG DISPLAY 0492362122MA650056TONE 049268232407066462ELECT CAP 1O UF 100VDC AMMOC35 C36 C37 C38066469ELECT CAPACITOR 470MF 50V T&RC176066504CAPACITOR ELECT 25000UF 75VC142 C143070047SILICON DIODE 1N4148 T&RD1 D3 D4 D5 D6 D7 D8D9 D10 D21 D22 D25D26 D27070130ZENER DIODE 8.2V,1/2WD2070131DIODE RECTIFIERD11 D12 D13 D14 D15D16 D23 D24070139RECTIFIER BRIDGE MC1000D28087050REED RELAY FORM 1A,5V,500 OHMSK2 K3 K4 K5 K6 K7 K8K9 K10 K11 K12 K13K16 K17 K18 K20087057RELAYK1 K21087069POWER RELAY TV5 24VK24087072RELAY 24V TV8/VDE CERTIFIEDK22 K23089089FUSE 2A SLO-BLO 5X20F11172154-PIN CONNECTORJ3 J8117219MALE CONN 10 POSJ1117244FRICTION LK CONN 9POS MALEJ6 J711727911-POS. MALE CONN.J2117404HEADER 2-PIN 0.156J4 J5117436PJ261G PHON JACK, GOLDJ23117455PHONO JACK 8P, GOLD PLATEDJ21 J22117494MINI JACKJ28117549HEADPHONE JACK DUAL BLACK 1/8J24 J25 J26 J27117708FASTON BLADE W/FEETJ10 J11 J12 J13 J14 J15J16 J17 J18 J19 J2117712FASTON BLADE .110J20117717MTA-156 HEADER 8PINJ9122297CHOKE OUTPUT .65UHL2 L3132172TRANSISTOR SI PNP MPSA55Q50132193TRANSISTOR J.F.E.T. 2N4392Q62 Q64132223TRANSISTOR NPN MPS4124 2K/REELQ44 Q46 Q47Q57 Q58Q59 Q61Q63 Q66 Q75Q78 Q79 Q80 Q81 Q83Q87 Q88132224TRANSISTOR PNPQ1 Q40 Q48 Q49 Q52Q69 Q73 Q74 Q76 Q77132254TRANSISTOR NPNQ54 Q55 Q56 Q67 Q68Q71 Q85 Q86132255TRANSISTOR PNPQ2 Q51 Q53 Q65 Q70Q72132261TRANSISTOR PNPQ18 Q82132262TRANSISTOR NPNQ17 Q84133028IC OPERATIONAL AMPLIFIERIC1 IC3133067NE5534AN OP AMP LOW NOISEIC16 IC17133108IC +5V REGULATORIC5133153IC REGULATOR -15VIC6133154IC REGULATOR 15VIC7133175IC AND 2 INPUT X 4IC14133180LB1720 8 LN DRIVER ARRAYIC10 IC13133186IC SHFT REG SER-PARIC9 IC11 IC12133260DUAL OPERATIONAL AMPLIFIERIC2 IC4 IC15133360OCTAL DAR TRANS ARRAY W/DIODEIC8134389TRIM POT 100K,10%,3/8SQ.R237 R238137042FLAMEPROOF RES 47 OHM 5% 1/4WR56 R60141165RES CF 10 5% 1/2WR77 R79 R119 R230R231 R232144053RES MF 10K 1% 1/4WR122 R134 R171 R217R218144071METAL FILM RES 365 OHM 1% 1/4WR265 R266 R267 R268R269 R270 R271 R272144086METAL FILM RES 475 OHM 1% 1/4WR45 R167 R168 R187144090METAL FILM RES 1K 1% 1/4WR36 R164 R170 R184R241 R242 R249 R255R262 R263 R264144095RES MF 3.32K 1% 1/4WR41 R55 R188 R193PART NODESCRIPTIONREFERENCE NO049193 INPUT DRIVER003611CARD MOUNTING BRACKETSP1 SP2061196DISC CAP 47PF,20%,N470 50VC146 C152 C157 C159061199DISC CAP 100PF 10% N1500 50VC58 C61 C72 C73 C74C75 C76 C78 C140 C141C156 C158061248DISC CAP .1MF,25V,Y5TC32 C33 C55061268MONO CAP .1UF,50V,Z5UC62 C63 C64 C65 C66C67 C68 C69 C70 C71C161 C162 C171 C172061273220PF 5% 100V NPOC173 C174 C175064254M POLY FILM CAP .1MF,10%,100VC129064267M. POLYESTER CAP .22MF,400VC145064312CAP M POLY .01UF 5% 63VDCC165 C167064318CAP M POLY .033UF 5% 63/100VDCC166 C168064364CAP POLYPROP .047MF 10% 250VC47 C144066269CAP ELECT 1UF 10% 50VC115 C116066309CAP ELECT 1000UF 10VC132066330CAP ELECT 220UF 16V SHORT CANC163 C164066344CAP ELECT 100UF 25VC133 C134066360CAP ELECT 3300UF 35VC125 C127 C128066361CAP ELECT 1000UF 20% 35VC126066445ELECT CAP 10MF, 50V AMMO PACKC30 C85 C86 C87 C88C89 C90 C91 C93 C94C95 C96 C97 C98 C99C100 C102 C103 C104C105 C106 C115 C117C118 C123 C124 C153C154 C177066446ELECT CAP 47MF, 35V AMMO PACKC92 C101066447ELECT CAP 100MF 16V AMMO PACKC22 C40 C119 C120C121TONE 049268PARTS LIST2526MA65007144097METAL FILM RES 4.75K 1% 1/4WR46 R86 R177 R222R227 R233 R234144107METAL FILM RES 40.2K 1% 1/4WR161 R192144108RES MF 47.5K 1% 1/4WR29 R62 R65 R66 R69R175 R181 R182 R247R251144113RES MF 100K 1% 1/4WR100 R162 R196 R228144119METAL FILM RES 332K 1% 1/4WR221 R226144125METAL FILM RES 150K 2% 1/4WR169 R190144127METAL FILM RES 95.3K 1% 1/4WR248 R257144141METAL FILM RES 27.4K 1% 1/4WR219 R223144154RES MF 12.1K 1% 1/4WR128 R172144160METAL FILM RES 22.1OHM 1% 1/4WR152 R156144172RES MF 221 OHMS 1% 1/4WR51 R53 R145 R146R160 R186 R239 R240144187METAL FILM RES 22.1K 1% 1/4WR104 R105144191RESISTOR MF 1.21K 1% 1/4WR38 R101 R159 R173144196METAL FILM RES 100 OHM 1% 1/4WR67 R68 R136 R137R138 R139 R140 R141R142 R144 R150144210RES MF 7.5K 1% 1/4W CRB1/4FXR245 R25314422095.3 OHMS 1% 1/4W MFR246 R256144225MF RES, 30K OHM 1% 1/4WR147 R148 R258 R259144262RES NETWORK, 2X220K, ISOR1 R2 R3 R4 R5 R6 R7R154 R243144264METAL FILM RES 10M 1% 1/4WR220 R224144265METAL FILM RES 2.21M 1/4WR225 R229144273RESISTOR MF 182 OHM 1/4W 1%R157 R205144338RES MF 324 OHM 1% 1/4WR163 R194144378RES MF 2.21 OHM 1/4W 1%R250 R252144440MF RES 14.3K 1% 1/4WR50 R165144441METAL FILM RES 274K 1% 1/4WR52 R158 R176R178 R179 R195144442METAL FILM RES 47.5 1% 1/4WR244 R254144443METAL FILM RES 681K 1% 1/4WR30 R37 R83 R166 R174148059SLIDE SWITCHS1 S2178159FUSE HOLDER 5X20MM PCB MOUNTF1049194 HEATSINK061023DISC CAP 100PF 10% N1500C7 C8061159CERAMIC CAP .01MF +80-20% 50VC9 C16061248DISC CAP .1MF,25V,Y5TC3 C5064363CAP POLYPROP 0.15MF 10% 250VDCC10066446ELECT CAP 47MF, 35V AMMO PACKC1 C2070047SILICON DIODE 1N4148 T&RD1 D2 D3 D4 D5070133DIODE 200V,6AD6 D71172132-PIN MALE CONNECTORJ3117244FRICTION LK CONN 9POS MALEJ1117404HEADER 2-PIN 0.156J2132223TRANSISTOR NPN MPS4124 2K/REELQ1132224TRANSISTOR PNPQ2132261TRANSISTOR PNPQ7132262TRANSISTOR NPNQ6134390TRIM POT 200 OHM 20% HORIZ ADR13137093MET OX 680 5% .5WR2 R9137094MET OX 1.8K 5% .5WR6 R11137095MET OX 430 5% .5WR7137096MET OX 47 5% .5WR12139177WIREWOUND RES 0.5 OHM 5W 5%R31 R32 R33 R34 R35R36 R37 R38144053RES MF 10K 1% 1/4WR3 R10144172RES MF 221 OHMS 1% 1/4WR1 R8144279THERMISTOR 100 OHMRT1144378RES MF 2.21 OHM 1/4W 1%R30049195 CONTROL058153INCANDESCENT LAMP 14V 100MADS13 DS14 DS15DS16DS17 DS18061268MONO CAP .1UF,50V,Z5UC3 C5 C6 C7 C10061273220PF 5% 100V NPOC8 C9061277MONO CAP 0.1MF 20% 50VC1066254CAP ELECT 220UF 50V 20%C2066330CAP ELECT 220UF 16V SHORT CANC4070093LED LAMP REDDS1 DS2 DS3 DS4 DS5DS6 DS7 DS8 DS9 DS10DS11 DS12117216MALE CONN 5-PIN 0.1 POST ASSYJ411727911-POS. MALE CONN.J1117462PHON JACK 1 1/8” STEREO VERJ3121031IR SENSOR 38KHZMT1133175IC AND 2 INPUT X 4IC1133186IC SHFT REG SER-PARIC3 IC4133191IC DC MOTOR DRIVERIC2133241IC MICROPRCSSR RESET POSIC6133394PROGRAMMED DEVICE144053RES MF 10K 1% 1/4WR5 R16144090METAL FILM RES 1K 1% 1/4WR14 R15144113RES MF 100K 1% 1/4WR2144157METAL FILM RES:10 OHMS 1% 1/4WR4144196METAL FILM RES 100 OHM 1% 1/4WR1144290RES NETWORK 3 X 10K BUSSEDR6144338RES MF 324 OHM 1% 1/4WR7 R8 R9 R10 R11 R12R13144378RES MF 2.21 OHM 1/4W 1%R19144444METAL FILM RES 75 1% 1/4WR3150058TACT SWITCHS1 S2 S3 S4 S5 S6S7 S8S9 S10 S11S12178139IC SOCKET 24-PINIC5180039CERAM RESON 6.0MHZ W/CAPY1049235 LAMP058120LAMP 14V #7373DS1 DS2 DS31172404 PIN RT. ANGLEJ1117274CONN. 2 POS. R-ANGLEJ2049236 POWER GUARD058133AMBER LEDDS1 DS2058153INCANDESCENT LAMP 14V 100MADS3 DS41172154-PIN CONNECTORJ2 J3 J4117216MALE CONN 5-PIN 0.1 POST ASSYJ1049268 TONE061191DISC CAP 22PF,10%,NPO 50VC3 C4061196DISC CAP 47PF,20%,N470 50VC16 C17061256M.CAP 470PF,5%,100VC26 C27 C38 C39061260MONOLYTHIC, 220PFC1 C2061268MONO CAP .1UF,50V,Z5UC28 C30 C31 C33 C36C37064254M POLY FILM CAP .1MF,10%,100VC5 C6064318CAP M POLY .033UF 5% 63/100VDCC18 C19 C20 C21064329CAP M POLY .22UF 5% 63VDCC40 C41 C42 C43066330CAP ELECT 220UF 16V SHORT CANC44 C45066345CAP ELECT 22UF 50VC9 C12066378CAP ELECT 47UF 16V BPC15066445ELECT CAP 10MF, 50V AMMO PACKC7 C10 C11 C14 C34C35066446ELECT CAP 47MF, 35V AMMO PACKC22 C2324 C25070047SILICON DIODE 1N4148 T&RD1 D2087050REED RELAY FORM 1A,5V,500 OHMSK1 K2 K3117219MALE CONN 10 POSJ1117707CONNECTOR MALE 6 POS RT ANGLEJ2133260DUAL OPERATIONAL AMPLIFIERIC1 IC2 IC3 IC4134457POT, EQUALR33 R34134464POTENTIOMETER BALANCE 2KOHMR32134490POTENTIOMETER 50KAX2R1144015METAL FILM RES 33.2K 1% 1/4WR23 R25144053RES MF 10K 1% 1/4WR9 R27144086METAL FILM RES 475 OHM 1% 1/4WR14 R28144090METAL FILM RES 1K 1% 1/4WR6 R11 R13 R17144095RES MF 3.32K 1% 1/4WR21 R22144107METAL FILM RES 40.2K 1% 1/4WR39 R40144113RES MF 100K 1% 1/4WR12 R15 R16 R29 R36R38144157METAL FILM RES 10 OHMS 1% 1/4WR8 R10144160METAL FILM RES 22.1OH 1% 1/4WR2 R26144195MF RES, 681 OHM 1% 1/4WR5 R20144196METAL FILM RES 100 OHM 1% 1/4WR35 R37144298MF 2.21K 1% 1/4WR30 R31144304MF 2.74K 1% 1/4WR3 R18 R19 R24144364RES MF 475K 1% 1/4WR4 R7PARTS LIST cont27280EXPLODED VIEW2930MA65003132Ref.PartDescriptionNo.No.1016404FRONT PANEL GLASS2004899EXTRUSION BRACKET3018612END CAP4101042TS 4-40 X 1/2 SLOT FILLISTER5171260C/A INPUT/POWER SWITCH60175