McIntosh-MC2000-pwr-sm 维修电路原理图.pdf

SERVICE MANUALPOWER AMPLIFIERPerformance Specifications . 2Notes . 2Rear Panel. 3Section Location . 4Block Diagram . 5 - 6Interconnection Diagram . 7 - 8Input PCB and Schematic. 9 - 10Main PCB and Schematic. 11 - 13Power Supply PCB and Schematic . 14AC Power PCB and Schematic . 15 - 16Switch Remote PCB and Schematic . 17 - 18Meter PCB and Schematic. 19 - 20Bias Control PCB and Schematic . 21 - 22Meter Lamp PCB and Schematic . 21 - 22Lamp PCB and Schematic . 21 - 22Logo Lamp PCB and Schematic . 21 - 22Output PCB and Schematic. 21 - 22Parts List. 23 - 24Exploded View and Parts List. 25 - 28Repacking Instructions . 29CONTENTSRadioFans.CN 收音机爱 好者资料库PERFORMANCE SPECIFICATIONS1. The heavy lines on the schematics denote theprimary signal path.2. Unless otherwise noted, all voltages indicated onthe schematics are measured under the followingconditions:a. AC input at 120 volts, 50/60Hzb. All voltages are +/-10% with respect to ground.A high impedance (10megaohm) voltmeter mustbe used.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. WARNING:Parts marked with the symbol have criticalcharacteristics. Use only replacement parts recommended by the manufacturer.NOTES2Power Output130 watts into 8, 4 or 2 ohm loads is the minimum sinewave continuous average power output per channel from20Hz to 20,000Hz with both channels operating.Total Harmonic Distortion0.5% maximum harmonic distortion at any power levelfrom 250 milliwatts to rated power per channel from20Hz to 20,000Hz with both channels operating.Intermodulation Distortion0.5% maximum intermodulation distortion if instanta-neous peak power output does not exceed twice theoutput rating per channel with both channels operating,for any combination of frequencies from 20Hz to20,000Hz.Rated Power Band20Hz to 20,000HzFrequency Response (at 1 watt)+0, -0.25dB from 20Hz to 20,000Hz+0, -3dB from 10Hz to 100,000HzHum and Noise (A-Weighted)100dB below rated outputDamping FactorGreater than 18Output Load Impedance2, 4 or 8 ohmsInput Impedance20k ohms Unbalanced (RCA Phono Jacks)40k ohms Balanced (XLR Connectors)Input Sensitivity (Switch Selectable)2.5 volts for rated output1.2 volts for rated output (1 volt for 100 watts output)Tube Compliment8 KT88 or 6550 Output Tubes4 12AX7A Input Tubes2 12AT7 Driver TubesPower Requirement100 Volts, 50/60Hz at 5.8 Amps120 Volts, 50/60Hz at 4.8 Amps230 Volts, 50/60Hz at 2.5 AmpsNote: Refer to the rear panel of the MC2000 for the correct voltage.Dimensions17-3/4 inches (45.1cm) wide by 11 inches (27.9cm)high. Depth behind front panel is 18-3/4 inches (47.6cm). Handle clearance required in front of the mountingpanel is 1-5/8 inches (4.1 cm).FinishStainless Steel Chassis with Titanium Gold Super MirrorFinish, Black Transformer Enclosures, Black Base,Glass Front Panel with gold plated Handles and KnobsWeightAmplifier - 135 pounds (61.2 kg) net, 144 pounds(65.3 kg) in shipping cartonAccessories - 18 pounds (8.2 kg) in shipping cartonRadioFans.CN 收音机爱 好者资料库MC20003REAR PANELSECTION LOCATIONTOP VIEW WITH COVER REMOVEDBOTTOM VIEW WITH COVER REMOVED4BLOCK DIAGRAM56MC2000MUTEBALANCED/UNBALANCEDRELAYUNBALANCED+-BALANCED1.2V/2.5VLEVELRELAYBUFFERVOLTAGEN.F.B.BUFFERHOLDCIRCUITRECTIFIERBUFFERBIASCONTROLBUFFEROUTPUTTRANS-FORMER842?COMLEFTOUTPUTL. METERHOLDCIRCUITRECTIFIERBIASCONTROLBUFFERBUFFEROUTPUTTRANS-FORMERBUFFERMUTEBUFFER1.2V/2.5VLEVELRELAYBALANCED/UNBALANCEDRELAYVOLTAGEN.F.B.BALANCEDUNBALANCED842?COM-+R. METERRIGHTOUTPUTMETERHOLDSWITCHINPUTLEVELSWITCHBALANCED/UNBALANCEDMODE SWITCHLEFTINPUTSRIGHTINPUTS UNITY INVERTING AMP UNITY GAIN AMP INPUT AMP DRIVER AMP DRIVER AMP LOG AMP OUTPUT AMP OUTPUT AMP DC AMP DC AMP DC AMP DC AMP OUTPUT AMP LOG AMP DRIVER AMP DRIVER AMP OUTPUT AMP INPUT AMP UNITY INVERTING AMP UNITY GAIN AMP PHASE INVERTER PHASE INVERTER POWERRELAYFUSEINPUTVOLTAGESELECTORMAIN 500VDC SUPPLY 150 AND 300V DC- 12VDC-+ 12VDCINPUTVOLTAGESELECTORMAIN 500VDC SUPPLY 150 AND 300V DC- 12VDC-+ 12VDCFUSEFUSEPOWERSWITCHPOWERCONTROLREMOTELAMPINOUTLEFTPOWERSUPPLYRIGHTPOWERSUPPLYPOWERTRANSFORMERPOWERTRANSFORMER12VAC12VACSTANDBYTRANSFORMERCONTROL5V SUPPLY100/120/230VAC50/60HzINRUSHCURRENTLIMITERINRUSHCURRENTLIMITERREMOTEJACKSPOWER SUPPLY SECTIONINTERCONNECT78INPUT 0493059100MC20002R2LMAIN 04930611123R3LMAIN 0493061314MC20003R3LPOWER SUPPLY 0493084R4LAC POWER 04930915165SWITCH REMOTE 0493101718MC20006METER 04930719207R 7LBIAS CONTROL 0493112122MC20008R 8LMETER LAMP 0493379R 9LLAMP 04931110LOGO LAMP 04931111R 11LOUTPUT 04931212R 12LPARTS LIST23240PART NO.DESCRIPTIONREF. NO.049305 Input066316CAP ELECT 10UF 20% 25V NPC1 C3070047SILICON DIODE 1N4148 T&RD1 D2087056REED RELAY FORM 1C 5V 125OHMK1 K2117216MALE CONN 5 PIN 0.1 POST ASSYJ2-117221MALE CONN 3 POS RT ANGLEJ3-1177229 POSITION RECEPTACLEJ1-132222N. CHANNEL FETQ6144015MF RES 33.2K 1% 1/4WR1144104METAL FILM RES 20K 1% 1/4WR6144141MF RES 27.4K 1% 1/4WR4144154RES MF 12.1K 1% 1/4WR23144269METAL FILM RES 1M 1/4WR11 R12144379RES METAL FILM 4.75M 1/4W 1%R19144412MF RES 15K 1% 1/4WR24144421MF RES 221K 1% 1/4WR2144423MF RES 174 OHM 1% 1/2WR8 R20144439MF RES 24.9K 1% 1/4WR5 R7049306 Main061293DISC 22PF 500VC1 C17061295DISC 3.3 PF 1000VC2061306DISC 220 PF 100VC18064364CAP POLYPROP .047MF 10% 250VC25064431POLYPRO 0.1MF 630VC9 C10064432POLYPRO 0.22MF 1000V 20%C12 C13064433POLYPRO 1.0MF 250V 20%C4064435POLYPRO 2.2 MF 250V 10%C5066492ELECT 10MF 100VC8 C11066493ELECT 10MF 250VC15 C16066494ELECT 10MF 450VC19066495ELECT 47MF 16VC22 C24066497ELECT 47MF 450VC20066498ELECT 100MF 6.3VC6 C7066500ELECT 1000MF 16V NONPOLARC14066502ELECT 4700MF 25VC21 C23070126DIODE 200V 3AD1 D2089088FUSE 2A SLO-BLO 5 X 20 250VIECF1117217MALE CONN 7 PINJ3-117218MALE CONN 6-POS FRICTION LKJ2-1177239 POSITION HEADERJ1-1177249 CIRCUIT POST HEADER NATURALJ4-1177259 CIRCUIT POST HEADER REDJ5-122001CHOKE 2.2 MHL1 L2 L3 L4132136TRANSISTOR NPN T092Q1 Q2 Q3 Q4Q5 Q6133155IC REGULATOR -12VIC2133156IC REGULATOR 12VIC1134492TRIM POT 2K 10%R7139009WIRE RES 220 OHMS 10% 5WR42 R43 R44R451392182.7 OHM 2W 5% WW RESISTOR FPR52 R53144104METAL FILM RES 20K 1% 1/4WR2214410633.2K 1% 1/4WR18 R51144113RES MF 100K 1% 1/4WR2144119METAL FILM RES: 332K 1% 1/4WR27144141METAL FILM RES 27.4K 1% 1/4WR50144196METAL FILM RES 100 OHM 1% 1/4WR14144269METAL FILM RES 1M 1/4WR91443091K OHM 1% 1/2W METAL FILMR38 R39 R40R41144408MF RES 562 OHM 1% 1/4WR13144410MF RES 1.2K 1% 1/4WR5 R10144414MF RES 18.2KR6 R8144417MF RES 93.1K 1% 1/4WR1144418MF RES 121K 1% 1/4WR4144421MF RES 221K 1% 1/4WR17 R21 R25R26144422MF RES 1.5M 1% 1/4WR23 R24144424MF RES 3.92K 1% 1/2WR47144427MF RES 22.1K 1% 1/2WR46144428MF RES 47.5K 1% 1/2WR16 R20 R34R35144429MF RES 100K 1% 1/2WR3 R11144430MF RES 121K 1% 1/2WR15144431MF RES 150K 1% 1/2WR19144432MF RES 1M 1/2WR32 R33144435MO RES 30.1K 1% 1WR36 R37144436MO RES 46.4K 1% 1WR28 R29 R30R31 R48144437MO RES 10K 5% 2WR49144438MO RES 100K 5% 2WR54178169OCTAL TUBE SOCKET CERAMICV4 V5 V6 V71781709 PIN TUBE SOCKET CERAMICV1 V2 V3049308 Power Supply064431POLYPRO 0.1MF 630VC10064434POLY CAP .047UF 10% 1KV (MKP4)C9066495ELECT 47MF 16VC5066496ELECT 47MF 250VC6 C7 C8066503ELECT 810MF 300VC1 C2 C3 C4070099ZENER DIODE 12V 400MWD3070131DIODE RECTIFIERD5 D6070165BRIDGE RECT 1000V 6AD4070166MR253L TRANS. SUPPRESSORD2080017TO-220 HEATSINKQ1089088FUSE 2A SLO-BLO 5 X 20 250VIECF11177249 CIRCUIT POST HEADER NATURALJ2-1177259 CIRCUIT POST HEADER REDJ1-132284MTP2955V FET POWER TRANSISTORQ1144415MO RES 475 1% 1WR5144425MF RES 10K 1% 1/2WR1 R3 R4144426MF RES 15K 1% 1/2WR2049309 AC Power066501ELECT 3300MF 35VC1070031SIL DIODE 400 PIV 1.5A (RED)D2087071RELAY TV8 5V COILK1089111FUSE 50MA 5X20MMF11172154-PIN CONNECTORJ8-117216MALE CONN 5-PIN 0.1 POST ASSYJ9117719PCB MOUNT POWER CONNECTOR REDJ10- J11- J12-J13- J14- J15-117726.187 FASTON TABJ1 J2 J3 J4 J5 J6J7133108IC +5V REGULATORIC1144090METAL FILM RES 1K 1% 1/4WR1144282THERMISTORRT1 RT2RT3RT4159314TRANSFORMER 115/230-8/16V 6VAT1178172FUSE HOLDER 5X20MMF1049310 SW Remote061248DISC CAP .1MF 25V Y5TC2064329CAP M POLY .22UF 5% 63VDCC1117214MALE CONN 3-POS MTS100 NORMALJ3117218MALE CONN 6-POS FRICTION LKJ4-117406MIN. PHONO JACK R657J1- J2-132171TRANSISTOR NPNQ1133192IC NAND SCHMIT 2-IN X 4IC1144082METL FILM RES 68.1 OHM 1% 1/4WR5 R6144090METAL FILM RES 1K 1% 1/4WR1144187METAL FILM RES 22.1K 1% 1/4WR2 R3144269METAL FILM RES 1M 1/4WR4148074SLIDE SWITCH DPDT 3MMS1 S2049307 Meter061248DISC CAP .1MF 25V Y5TC4 C9 C10 C11061249DISC CAP .47UF 50V MONOLITHICC12 C13064329CAP M POLY .22UF 5% 63VDCC8064337POLY CAP 1MF 5% 50VC7066491ELECT 4.7MF 100VC1066499ELECT 220MF 25VC2 C3066510CAP ELEC 1 UF 50VC14070047SILICON DIODE 1N4148 T&RD1 D3 D4 D6D7 D8 D9 D10D13070085ZENER DIODE 6.2V 5% 500MWD12070131DIODE RECTIFIERD2 D11089088FUSE 2A SLO-BLO 5 X 20 250VIECF1117221MALE CONN 3 POS RT ANGLEJ2-117223MALE CONN 6 PIN RT ANGLEJ1-1172404 PIN RT. ANGLEJ3-131021TRIAC 8A 200VQ8132223TRANSISTOR NPN MPS4124 2K/REELQ1 Q5132224TRANSISTOR PNPQ2 Q6132226TRANSISTOR P.CHANNEL JUNC.FETQ7132254TRANSISTOR NPNQ3 Q4133155IC REGULATOR -12VIC2133156IC REGULATOR 12VIC1133260DUAL OPERATIONAL AMPLIFIERIC3 IC4134383TRIM POT 100K OHM 20%R10141060RES CF 3.3K 5% 1/4WR23141125RES CF 2.7M 5% 1/4WR1141136RES CF10 5% 1/4WR26141179CARB FILM RES 680 OHMS 5% 1/2WR24144053RES MF 10K 1% 1/4WR7 R20 R22144053RES MF10K 1% 1/4WR7 R22144087MF 499 OHMSR17144090METAL FILM RES 1K 1% 1/4WR19 R2514410316.5K 1% 1/4WR18144117METAL FILM RES 200K 1% 1/4WR6 R12144125METAL FILM RES 150K 2% 1/4WR9144187METAL FILM RES 22.1K 1% 1/4WR21144196METAL FILM RES 100 OHM 1% 1/4WR11 R16144264METAL FILM RES 10M 1% 1/4WR8144269METAL FILM RES 1M 1/4WR2144271METAL FILM RES 2.74M OHM 1/4WR13144411MF RES 3.92K 1% 1/4WR15144412MF RES 15K 1% 1/4WR5 R14144342MF RES 13.7K 1% 1/4WR20049311 Bias Control117217MALE CONN 7 PINJ1-134497TRIM POT 100K 10%R1 R214410633.2K 1% 1/4WR3150059TACT SWITCHS1 S2049337 Lamp1462523 POSITION 2POLE ROTARY SWITCHS1049312 Output064431POLYPRO 0.1MF 630VC1117726.187 FASTON TABJ1 J2 J3 J4 J5139119WIRE RES 4 OHMS 5% 5WR1EXPLODED VIEW 1 OF 22526MC2000EXPLODED VIEW 2 OF 227PARTS LIST1016403FRONT GLASS2049334GOLD KNOB3104164FELT WASHER4018628HANDLE FRONT5018625PANEL SIDE LEFT6018624PANEL SIDE RIGHT7100200MS 10-32 X 1/2 PHIL TRUSS BLK8017790PLEXIGLAS PANEL9092424METER COLOR FILTER10005007PANEL PLATE11101142CAP SCREW 1/4 -20 X 1-1/412101215SEMS MS 8-32 X 1/4 PHIL PAN13004961DUST COVER14005006GUSSET RIGHT15005005GUSSET LEFT16005039TOP SUBPANEL BRACKET17102003MACH NUT: 6-32 W/LOCK18101078TS 8-32 X 5/16 PHIL PAN BLK19126588SIGNATURE NAMEPLATE20049379WINDOW TRIM21101054TS 6-32 X 1/4 PH PAN TAPTITE BLK22124071METER23005008SWITCH BRACKET24049357METER ROTARY SWITCH PCB25049338PANEL/LED LIGHT PCB26104163M7 INTERNAL TOOTH LOCKWASHER27110004M7 X .75 HEX CONTROL NUT28004970SUBPANEL29092401BLUE FILTER PALE30092400BLUE FILTER AZURE31017749METER LIGHT BOX32049336METER LIGHT BOX PCB33114072PLASTIC RIVET34049307METER PCB35100296SEMS 4-40 X 5/16 PHIL PAN36094360FOAM TAPE 1/2” X 1/2”37094017FOAM TAPE 1/4” X 1/4”38049339PANEL LIGHT PCB39005018CHASSIS GOLD4016506512AX7A TUBE4116506712AT7 TUBE42165069KT88 TUBE43017761AIR PIPE44049305INPUT SWITCH PCB45114139PCB SUPPORT46017801PLASTIC RIVET47100292MS 6-32 X 3/8 PH FH BLK ZINC48102006MACH NUT: 10-32 W/LOCK49049304POWER TRANSFORMER50126582POWER TRANSFORMER DECAL51049301OUTPUT TRANSFORMER52126581OUTPUT TRANSFORMER DECAL53052093TUBE COVER54101214SCREW, TUBE COVER55049306MAIN AMP PCB56004967FOOT CHANNEL RIGHT57004968FOOT CHANNEL LEFT58018626FOOT59004971CHASSIS SUPPORT60024010FOOT PAD61005071INPUT SHIELD BRACKET62005032CHASSIS BASE63049310SWITCH REMOTE PCB64049308POWER SUPPLY PCB65049309AC POWER PCB66018622HANDLE REAR67117742RCA JACK RED68117743RCA JACK WHITE69117487AC LINE RECEPTACLE70178122FUSE HOLDER W/HARDWARE71117741BINDING POST BLACK72117740BINDING POST RED73117744XLR RECEPTACLE74100195MS 4-40 X 3/8 PHIL OVAL GOLD75104165LW INTERNAL TOOTH76102052NUT GOLD771001101/4-20 X 5/8 PAN PH BLK ZINC78104162LOCKWASHER INTERNAL TOOTH79102051HEX NUT M9 X .75 GOLD PLATED80049312OUTPUT TERMINAL PCB81005035BIAS PLATE LEFT82005036BIAS PLATE RIGHT83049311BIAS PCB84101193SEMS 4-40 X 1/4 PHIL PAN BLK ZINC85004974BIAS COVER86100193MS 4-40 X 1/4 FLAT PH BLK ZINC87004969BOTTOM COVER88100159MS 10-32 X 3/4 PH PAN BLK ZINC280Ref.No.PartNo.Description29REPACKING INSTRUCTIONSPOWER AMPLIFIERSERVICE MANUALThe continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design without notice.Because of the constant upgrading of McIntosh products circuitry and components, the Company cannot insure, and does not warrant, the accuracy of thewithin schematic material, which is intended for information only.McINTOSH LABORATORY, INC., 2 CHAMBERS STREET, BINGHAMTON, NEW YORK 13903 Printed in U.S.A. Part Number 040702