McIntosh-MC202-pwr-sm 维修电路原理图.pdf

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1、SERVICE MANUALPOWER AMPLIFIERPerformance Specifications . 2Notes . 2Rear Panel. 3Section Location . 3Block Diagram . 5 - 6Interconnection Diagram . 7 - 8Heatsink Schematic and PCB . 9 - 10Driver Schematic and PCB . 11 - 12Meter Schematic and PCB. 13 - 19Power Guard Lamp Schematic and PCB . 16Meter L

2、ight Schematic and PCB . 17Panel Lamp Schematic and PCB. 18Parts List. 19 - 20Exploded View and Parts List. 21 - 24Repacking Instructions . 25CONTENTSRadioFans.CN 收音机爱 好者资料库PERFORMANCE SPECIFICATIONS2NOTES1. The heavy notes on the schematic denote the primarysignal path.2. Unless otherwise noted, al

3、l 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. Ahigh impedance (10 megaohm) voltmeter must be used.3. Unless otherwise specified:a. Resistor values are in ohms.b. Capacitor values

4、are microfarads (uF).c. Inductor values are in microhenries (uH).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 manuf

5、acturer.Power Output Stereo200 watts into 2, 4 or 8 ohm loads is the minimum sinewave continuous average power output per channelwith both channels operating.Power Output Mono Bridged400 watts into 4, 8 or 16 ohm loads is the minimumsine wave continuous average power output.Output Load ImpedanceSter

6、eo - 2, 4 or 8 ohmsMono - 4, 8 or 16 ohmsRated Power Band20Hz to 20,000HzDynamic Headroom1.9dBFrequency Response+0, -0.25dB from 20Hz to 20,000Hz+0, -3dB from 10Hz to 100,000HzTotal Harmonic Distortion0.005% maximum at any power level from 250milliwatts to rated power per channel from 20Hz to20,000H

7、z, all channels operating.Intermodulation Distortion0.005% maximum if instantaneous peak output perchannel does not exceed twice the rated output with allchannels operating for any combination of frequenciesfrom 20Hz to 20,000Hz.Signal To Noise Ratio (A Weighted)110dB below rated outputSensitivity1.

8、7 Volts Unbalanced Input3.4 Volts Balanced InputInput Impedance10,000 ohms Unbalanced and BalancedWide Band Damping FactorGreater than 40Power 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

9、 amps240 Volts, 50/60Hz at 2.0 ampsNote: Refer to the rear panel of the MC202 for the correctvoltage.DimensionsFront Panel: 17-1/2 inches (44.45cm) wide, 5-7/16inches (13.81cm) high. Depth behind front mountingpanel is 18 inches (45.72cm). Clearance required in frontof the Front Panel is 1 inch (2.5

10、4cm) for knobs.Weight65 pounds (29.49 kg) net, 83 pounds (37.65 kg) inshipping carton.RadioFans.CN 收音机爱 好者资料库REAR PANEL3MC202SECTION LOCATIONSNOTES456MC202BLOCK DIAGRAM78INTERCONNECTHEATSINK 0493469102A 2BMC202DRIVER 04935311123METER 04935213144MC202METER 04935241516POWER GUARD LAMP 0493545AMETER LI

11、GHT 04935417185BMC2025CMETER LIGHT 049354PANEL LAMP 0493545D5EPANEL LAMP 049354PARTS LIST1920PART NODESCRIPTIONREFERENCE NOINTERCONNECT070139DIODE RECTIFIERD1089104FUSE 6.3A 250V SLO BLOF1124077METERMT1 MT2146243SWITCHS1 S2049349POWER TRANSFORMERT1049350OUTPUT TRANSFORMERT2074091AC TERM BLOCKTB10493

12、46 HEATSINK PCB061300MONO CAP 100PF 100V 5% NPO T&RC7 C8061304MONO CAP .01UF 50V 5% X 7R T&RC9 C16061305MONO CAP .1UF 50V 5% Z50 T&RC3 C5064363CAP POLYPROP 0.15MF 10% 250VDCC10066446CAP ELECT 47MF 35VC1 C2070047SILICON DIODE 1N4148 T&RD1 D2 D3 D4 D5070131DIODE RECTIFIERD6 D71172132-PIN MALE CONNECTO

13、RJ4-117217MALE CONN 7 PINJ1117404HEADER 2-PIN 0.156J3-117708FASTON BLADE W/FEETJ2132171TRANSISTOR NPNQ1132172TRANSISTOR SI PNP MPSA55Q2132285TRANSISTOR NPN 25C3334CQ6132286TRANSISTOR PNP 2SA32ICQ7134390TRIM POT 200 OHM 20% HORIZ ADR13137093MET OX 680 5% .5WR2 R9137094MET OX 1.8K 5% .5WR6 R11137095ME

14、T OX 430 5% .5WR7137096MET OX 47 5% .5WR12139177WIREWOUND RES 0.5 OHM 5W 5%R31 R32 R33 R34 R35 R36144172RES MF 221 1% 1/4WR1 R8144279THERMISTOR 100RT1144378RES MF 2.21 OHM 1/4W 1%R30144412MF RES 15K 1% 1/4WR3 R10049353 DRIVER PCB061249DISC CAP .47UF 50V MONOLITHICC31 C39061298MONO CAP 22PF 200V 5% N

15、PO T&RC115 C116 C118 C120061299MONO CAP 47PF 200V 5% NPO T&RC117 C119061300MONO CAP 100PF 100V 5% NPO T&RC27 C28 C100 C101 C102C103061305MONO CAP .1UF 50V 5% Z50 T&RC32 C33064310CAP MPOLY .0068UF 5% 100/250VDCC105 C106064363CAP POLYPROP 0.15MF 10% 250VDCC109 C110064364CAP POLYPROP .047MF 10% 250VC10

16、7 C108066446CAP ELECT 47MF 35VC29 C30066462CAP ELECT 1OUF 100VDCC35 C36 C37 C38 C104 C111C112 C113 C114066507CAP ELECT 220UF 25VC22 C441172154-PIN CONNECTORJ3- J4-117217MALE CONN 7 PINJ5- J6-11727911-POS. MALE CONN.J7-117436PJ261G PHON JACK, GOLDJ1117685XLR RECEPTACLE FEMALEJ2 J8117759STEREO 1/8 HEA

17、D PHONE JACKJ15 J16132222N. CHANNEL FETQ61 Q62132223TRANSISTOR NPN MPS4124 2K/REELQ6 Q35 Q42 Q44 Q45 Q46Q47 Q49 Q58132224TRANSISTOR PNPQ1 Q3 Q19 Q39 Q40 Q43 Q59Q60132254TRANSISTOR NPNQ5 Q34 Q52 Q53 Q55 Q56132255TRANSISTOR PNPQ2 Q38 Q48 Q50 Q51 Q54132285TRANSISTOR NPN 25C3334CQ17 Q21132286TRANSISTOR

18、PNP 2SA32ICQ18 Q22133260DUAL OPERATIONAL AMPLIFIERIC1 IC2137042FLAMEPROOF RES 47 OHM 5% 1/4WR56 R60139005WIRE RES 2 OHMS 10% 5WR177 R179139119WIRE RES 4 OHMS 5% 5WR176 R178144053RES MF 10K 1% 1/4WR45 R64 R131 R136144086RES MF 475 1% 1/4WR164 R171144089RES MF 806 1% 1/4WR38 R89 R92 R101144090RES MF 1

19、K 1% 1/4WR44 R49144095RES MF 3.32K 1% 1/4WR41 R55 R96 R98 R133 R165 R166144097RES MF 4.75K 1% 1/4WR46 R47 R135 R162144104RES MF 20K 1% 1/4WR132 R148 R156 R161 R172 R175R182 R183 R184 R185144106RES 33.2K 1% 1/4WR153 R163144108RES MF 47.5K 1% 1/4WR19 R27 R29 R94144112RES 82.5K 1% 1/4WR154 R155 R167 R1

20、68144118RES MF 267K 1% 1/4WR20 R28 R30 R31 R186144154RES MF 12.1K 1% 1/4WR150 R152144157RES MF 10 1% 1/4WR67 R68144172RES MF 221 1% 1/4WR139 R140 R141 R142 R143 R144R145 R146144179LDR NETWORK VTL5C9LD1 LD2144187RES MF 22.1K 1% 1/4WR157 R169 R170 R173144196RES MF 100 1% 1/4WR48 R61 R130144264RES MF 1

21、0M 1% 1/4WR158 R160144299RES MF 2.1K 1% 1/4WR138 R147 R151 R174144338RES MF 324 OHM 1% 1/4WR36 R51 R53 R76 R97 R99 R134R137144364RES MF 475K 1% 1/4WR180 R181144406METAL FILM RES 187K 1% 1/4WR37 R52 R75 R91148059SLIDE SWITCHS1049352 METER PCB061305MONO CAP .1UF 50V 5% Z50 T&RC207 C208 C217 C226 C2270

22、64329CAP M POLY .22UF 5% 63VDCC244 C245 C246064337CAP M POLY 1MF 5% 63VDCC241 C242066390CAP ELECT 22UF 100VC243066445CAP ELECT 10MF 50VC239 C240 C247066447CAP ELECT 100MF 16VC216066504CAPACITOR ELECT 25000UF 75VC237 C238066509CAP ELECT 3300UF 35VC235 C236070047SILICON DIODE 1N4148 T&RD3 D4 D5 D6 D7

23、D8 D9 D10 D12D12 D13 D14 D20070130ZENER DIODE 8.2V 1/2WD1070131DIODE RECTIFIERD15 D16 D17087052RELAY 8AR1089089FUSE 2A SLO-BLO 5X20F11172154-PIN CONNECTORJ3-117217MALE CONN:7 PINJ2-11727911-POS. MALE CONN.J1- J9-117404HEADER 2-PIN 0.156J21- J22-117708FASTON BLADE W/FEETJ14 J15 J26- J27 J28 J31 J41 J

24、42 J50131021TRIAC 8A 200VQ9131022600V TRIAC DRIVER OPTOCOUPLERQ8132223TRANSISTOR NPN MPS4124 2K/REELQ10 Q13 Q14 Q16 Q17 Q18 Q20 Q21Q22 Q23 Q24132224TRANSISTOR PNPQ11132226TRANSISTOR P.CHANNEL JUNC.FETQ12133093IC REGULATOR +5 VOLTQ3133192IC NAND SCHMIT 2-IN X 4IC4133260DUAL OPERATIONAL AMPLIFIERIC2 I

25、C3134383TRIM POT 100K OHM 20%R195 R196139079WIRE RES 1.5K 10% 5WR1981392182.7 OHM 2W 5% WW RESISTOR FPR197144081RES MF 68.1K 1% 1/4WR152 R192144091RES MF 1.1K 1% 1/4WR2 R3 R167 R172 R191144106RES 33.2K 1% 1/4WR165 R166144120RES MF 402K 1% 1/4WR199144128RES MF 1.5K 1% 1/4WR164144130RES MF 10.2K 1% 1/

26、4WR171 R189 R190 R194144157RES MF 10 1% 1/4WR138144187RES MF 22.1K 1% 1/4WR177 R184144191RES MF 1.21K 1% 1/4WR180 R187144196RES MF 100 1% 1/4WR175 R181 R186144265RES MF 2.21M 1/4WR178 R182144379RES METAL FILM 4.75M 1/4W 1%R183 R188144406METAL FILM RES 187K 1% 1/4WR4 R5 R179 R185144418MF RES 121K 1%

27、1/4WR170 R173144421MF RES 221K 1% 1/4WR193144422MF RES 1.5M 1% 1/4WR174 R200178159FUSE HOLDER 5X20MM PCB MOUNTF1049354 POWER GUARD LIGHTMETER LIGHTPANEL LAMP PCB058120LAMP 14V #7373C1 C2 C3 C4 C5 C6 C9 C10C11 C12058133AMBER LEDDS7 DS8058148RED LED HIGH EFFICIENCYDS20117221MALE CONN 3 POS RT. ANGLEJ1

28、0-1172404 PIN RT. ANGLEJ1- J2- J3- J4- J5-J6- J7- J8- J9-11724211 POS. RT ANGLEJ13117274CONN. 2 POS. R-ANGLEJ11- J12-2122MC202EXPLODED VIEW24EXPLODED VIEW PARTS LIST231016411GLASS PANEL2049320KNOB ASSEMBLY3104017BLK FELT WASHER40186115” ENDCAP5101042TS 4-40 X 1/2 SLOT FILLISTER6004810EXTRUSION BRACK

29、ET 5”7094360FOAM TAPE 1/2 X 1/28018588BOTTOM EXTRUSION9101172TCS 6-32 X 1/4 PHIL FLAT U/C10018587TOP EXTRUSION11017363PLEXIGLAS FILTER LIGHT BLUE12017711DISPLAY PLEXIGLAS13004804SUBPANEL14112092REVERSE LOCKING PCB SUPPORT15049354LAMP PCB ASSY16022315FISHPAPER SHIELD17114072PLASTIC RIVET18101054TS 6-

30、32 X 1/4 PH PAN TAPTITE BLK19112086NYLON SPACER20102001KEP NUT 4-40 CADMIUM PLATE21004805SWITCH BRACKET22146243POWER SWITCH23124077METER24092341FILTER AZURE BLUE25092342FILTER PALE BLUE26017447PLASTIC LIGHT BOX27004809TOP COVER28101078TS 8-32 X 5/16 PHIL PAN BLK29005023TRAY30078003RUBBER GROMMET3110

31、6007SPRING CLIP: LATCH TYPE32112038STL SPACER 4 X 3/8 NICKEL PLT33112104BOARD MOUNT34049352POWER SUPPLY METER PCB ASSY35112102MOUNTING STRAPS36049350OUTPUT TRANSFORMER37049349POWER TRANSFORMER38005024CHASSIS39017218PLASTIC FEET-BLACK40104063FLAT WASHER #10 CLEAR ZINC41100159MS 10-32 X 3/4 PHIL PAN B

32、LK ZINC42104067LK WASH: INTERNAL STAR #1043100120MS 10-32 X 1/4 PHIL PAN ZINC44101176TCS 6-32 X 1/2 PH PAN BLK TYPE F45074091AC TERMINAL BLOCK46104001FLAT STEEL WASHER #4 X 9/32 X .02547104004LK WASHER 5 X .255 INT STAR48102022MN 4-40 3/16 X 3/1649084135THERMAL PAD50070139RECTIFIER BRIDGE51102003MAC

33、H NUT 6-32 W/LOCK52112103HEX SPACER 6-32 X 2.37553049353DRIVER PCB ASSY54104005STEEL WASHER: FLAT 6 X 3/8 X .03255100255SEMS 6-32 X 3/8 PHIL PAN INTERNAL56018617AMPLIFIER HEATSINK57017160MOUNTING TAB W/ .140 DIA MTG58084187ISOSTRATE59112087PCB SPACER 1/4”60049346HEATSINK PCB ASSY61101059SM 6 X 5/8 P

34、HIL PAN TYPE A62114118TRANSISTOR CLIP 21863114119TRANSISTOR CLIP 21464110009NUT M5 X 0.8 BRASS WITH GOLD PLATE65104130LK #10 SPLIT PHOS/BRONZE66104148FLAT WASHER BRASS67084189DUAL BINDING POST RED68084124DUAL BINDING POST69102020MACH NUT 6-32 SELF-LOCK70178161FUSE HOLDER 5 X 20mm IEC71104016LK WASH:

35、 1/2 X .630 X .022 INT STAR72004800OUTPUT PLATE73005022REAR PANEL74117487AC LINE RECEPTACLE75101197HI/LO 4-24 X 3/8 PHIL ROUND BLACK76101114SM 4-24 X 1/2 PHIL PAN TYPE A77017706TERMINAL COVER78094332DOUBLE COATED MTG TAPE 1/8” THICK79078017GROMMET 3/4 X 9/1680104142LOCKWASHER 2.5mm INT STAR ZINCRefN

36、o.PartNo.DescriptionREPACKING INSTRUCTIONS25POWER 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 040722