McIntosh-MC202-pwr-sm 电路图 维修手册.pdf

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

2、. 16 Meter Light Schematic and PCB . 17 Panel Lamp Schematic and PCB. 18 Parts List. 19 - 20 Exploded View and Parts List. 21 - 24 Repacking Instructions . 25 CONTENTS RadioFans.CN 收音机爱 好者资料库 PERFORMANCE SPECIFICATIONS 2 NOTES 1. The heavy notes on the schematic denote the primary signal path. 2. Un

3、less otherwise noted, all voltages indicated on the schematics 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 impedance (10 megaohm) voltmeter must be used. 3. Unless otherwise specified: a. Resistor values ar

4、e in ohms. b. Capacitor values are microfarads (uF). c. Inductor values are in microhenries (uH). 4.On PC board drawings, Square pad indicates: a. Polarized Capacitors - Positive b. Diodes - Cathode c. Others - Pin 1 5.WARNING Parts marked with the symbol have critical characteristics. Use only repl

5、acement parts recom- mended by the manufacturer. Power Output Stereo 200 watts into 2, 4 or 8 ohm loads is the minimum sine wave continuous average power output per channel with both channels operating. Power Output Mono Bridged 400 watts into 4, 8 or 16 ohm loads is the minimum sine wave continuous

6、 average power output. Output Load Impedance Stereo - 2, 4 or 8 ohms Mono - 4, 8 or 16 ohms Rated Power Band 20Hz to 20,000Hz Dynamic Headroom 1.9dB Frequency Response +0, -0.25dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 100,000Hz Total Harmonic Distortion 0.005% maximum at any power level from 2

7、50 milliwatts to rated power per channel from 20Hz to 20,000Hz, all channels operating. Intermodulation Distortion 0.005% maximum if instantaneous peak output per channel does not exceed twice the rated output with all channels operating for any combination of frequencies from 20Hz to 20,000Hz. Sign

8、al To Noise Ratio (A Weighted) 110dB below rated output Sensitivity 1.7 Volts Unbalanced Input 3.4 Volts Balanced Input Input Impedance 10,000 ohms Unbalanced and Balanced Wide Band Damping Factor Greater than 40 Power Requirements 100 Volts, 50/60Hz at 4.8 amps 110 Volts, 50/60Hz at 4.4 amps 120 Vo

9、lts, 50/60Hz at 4.0 amps 220 Volts, 50/60Hz at 2.0 amps 230 Volts, 50/60Hz at 2.0 amps 240 Volts, 50/60Hz at 2.0 amps Note: Refer to the rear panel of the MC202 for the correct voltage. Dimensions Front Panel: 17-1/2 inches (44.45cm) wide, 5-7/16 inches (13.81cm) high. Depth behind front mounting pa

10、nel is 18 inches (45.72cm). Clearance required in front of the Front Panel is 1 inch (2.54cm) for knobs. Weight 65 pounds (29.49 kg) net, 83 pounds (37.65 kg) in shipping carton. RadioFans.CN 收音机爱 好者资料库 REAR PANEL 3 MC202 SECTION LOCATIONS RadioFans.CN 收音机爱 好者资料库 NOTES 4 56 MC202 BLOCK DIAGRAM 78 IN

11、TERCONNECT HEATSINK 049346 910 2A 2B MC202 DRIVER 049353 1112 3 METER 049352 1314 4 MC202 METER 0493524 1516 POWER GUARD LAMP 049354 5A METER LIGHT 049354 1718 5B MC202 5CMETER LIGHT 049354 PANEL LAMP 0493545D 5EPANEL LAMP 049354 PARTS LIST 1920 PART NODESCRIPTIONREFERENCE NO INTERCONNECT 070139DIOD

12、E RECTIFIERD1 089104FUSE 6.3A 250V SLO BLOF1 124077METERMT1 MT2 146243SWITCHS1 S2 049349POWER TRANSFORMERT1 049350OUTPUT TRANSFORMERT2 074091AC TERM BLOCKTB1 049346 HEATSINK PCB 061300MONO CAP 100PF 100V 5% NPO T&RC7 C8 061304MONO CAP .01UF 50V 5% X 7R T&RC9 C16 061305MONO CAP .1UF 50V 5% Z50 T&RC3

13、C5 064363CAP POLYPROP 0.15MF 10% 250VDCC10 066446CAP ELECT 47MF 35VC1 C2 070047SILICON DIODE 1N4148 T&RD1 D2 D3 D4 D5 070131DIODE RECTIFIERD6 D7 1172132-PIN MALE CONNECTORJ4- 117217MALE CONN 7 PINJ1 117404HEADER 2-PIN 0.156J3- 117708FASTON BLADE W/FEETJ2 132171TRANSISTOR NPNQ1 132172TRANSISTOR SI PN

14、P MPSA55Q2 132285TRANSISTOR NPN 25C3334CQ6 132286TRANSISTOR PNP 2SA32ICQ7 134390TRIM POT 200 OHM 20% HORIZ ADR13 137093MET OX 680 5% .5WR2 R9 137094MET OX 1.8K 5% .5WR6 R11 137095MET OX 430 5% .5WR7 137096MET OX 47 5% .5WR12 139177WIREWOUND RES 0.5 OHM 5W 5%R31 R32 R33 R34 R35 R36 144172RES MF 221 1

15、% 1/4WR1 R8 144279THERMISTOR 100RT1 144378RES MF 2.21 OHM 1/4W 1%R30 144412MF RES 15K 1% 1/4WR3 R10 049353 DRIVER PCB 061249DISC CAP .47UF 50V MONOLITHICC31 C39 061298MONO CAP 22PF 200V 5% NPO T&RC115 C116 C118 C120 061299MONO CAP 47PF 200V 5% NPO T&RC117 C119 061300MONO CAP 100PF 100V 5% NPO T&RC27

16、 C28 C100 C101 C102 C103 061305MONO CAP .1UF 50V 5% Z50 T&RC32 C33 064310CAP MPOLY .0068UF 5% 100/250VDCC105 C106 064363CAP POLYPROP 0.15MF 10% 250VDCC109 C110 064364CAP POLYPROP .047MF 10% 250VC107 C108 066446CAP ELECT 47MF 35VC29 C30 066462CAP ELECT 1OUF 100VDCC35 C36 C37 C38 C104 C111 C112 C113 C

17、114 066507CAP ELECT 220UF 25VC22 C44 1172154-PIN CONNECTORJ3- J4- 117217MALE CONN 7 PINJ5- J6- 11727911-POS. MALE CONN.J7- 117436PJ261G PHON JACK, GOLDJ1 117685XLR RECEPTACLE FEMALEJ2 J8 117759STEREO 1/8 HEAD PHONE JACKJ15 J16 132222N. CHANNEL FETQ61 Q62 132223TRANSISTOR NPN MPS4124 2K/REELQ6 Q35 Q4

18、2 Q44 Q45 Q46 Q47 Q49 Q58 132224TRANSISTOR PNPQ1 Q3 Q19 Q39 Q40 Q43 Q59 Q60 132254TRANSISTOR NPNQ5 Q34 Q52 Q53 Q55 Q56 132255TRANSISTOR PNPQ2 Q38 Q48 Q50 Q51 Q54 132285TRANSISTOR NPN 25C3334CQ17 Q21 132286TRANSISTOR PNP 2SA32ICQ18 Q22 133260DUAL OPERATIONAL AMPLIFIERIC1 IC2 137042FLAMEPROOF RES 47 O

19、HM 5% 1/4WR56 R60 139005WIRE RES 2 OHMS 10% 5WR177 R179 139119WIRE RES 4 OHMS 5% 5WR176 R178 144053RES MF 10K 1% 1/4WR45 R64 R131 R136 144086RES MF 475 1% 1/4WR164 R171 144089RES MF 806 1% 1/4WR38 R89 R92 R101 144090RES MF 1K 1% 1/4WR44 R49 144095RES MF 3.32K 1% 1/4WR41 R55 R96 R98 R133 R165 R166 14

20、4097RES MF 4.75K 1% 1/4WR46 R47 R135 R162 144104RES MF 20K 1% 1/4WR132 R148 R156 R161 R172 R175 R182 R183 R184 R185 144106RES 33.2K 1% 1/4WR153 R163 144108RES MF 47.5K 1% 1/4WR19 R27 R29 R94 144112RES 82.5K 1% 1/4WR154 R155 R167 R168 144118RES MF 267K 1% 1/4WR20 R28 R30 R31 R186 144154RES MF 12.1K 1

21、% 1/4WR150 R152 144157RES MF 10 1% 1/4WR67 R68 144172RES MF 221 1% 1/4WR139 R140 R141 R142 R143 R144 R145 R146 144179LDR NETWORK VTL5C9LD1 LD2 144187RES MF 22.1K 1% 1/4WR157 R169 R170 R173 144196RES MF 100 1% 1/4WR48 R61 R130 144264RES MF 10M 1% 1/4WR158 R160 144299RES MF 2.1K 1% 1/4WR138 R147 R151

22、R174 144338RES MF 324 OHM 1% 1/4WR36 R51 R53 R76 R97 R99 R134 R137 144364RES MF 475K 1% 1/4WR180 R181 144406METAL FILM RES 187K 1% 1/4WR37 R52 R75 R91 148059SLIDE SWITCHS1 049352 METER PCB 061305MONO CAP .1UF 50V 5% Z50 T&RC207 C208 C217 C226 C227 064329CAP M POLY .22UF 5% 63VDCC244 C245 C246 064337

23、CAP M POLY 1MF 5% 63VDCC241 C242 066390CAP ELECT 22UF 100VC243 066445CAP ELECT 10MF 50VC239 C240 C247 066447CAP ELECT 100MF 16VC216 066504CAPACITOR ELECT 25000UF 75VC237 C238 066509CAP ELECT 3300UF 35VC235 C236 070047SILICON DIODE 1N4148 T&RD3 D4 D5 D6 D7 D8 D9 D10 D12 D12 D13 D14 D20 070130ZENER DI

24、ODE 8.2V 1/2WD1 070131DIODE RECTIFIERD15 D16 D17 087052RELAY 8AR1 089089FUSE 2A SLO-BLO 5X20F1 1172154-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 J42 J50 131021TRIAC 8A 200VQ9 13102

25、2600V TRIAC DRIVER OPTOCOUPLERQ8 132223TRANSISTOR NPN MPS4124 2K/REELQ10 Q13 Q14 Q16 Q17 Q18 Q20 Q21 Q22 Q23 Q24 132224TRANSISTOR PNPQ11 132226TRANSISTOR P.CHANNEL JUNC.FETQ12 133093IC REGULATOR +5 VOLTQ3 133192IC NAND SCHMIT 2-IN X 4IC4 133260DUAL OPERATIONAL AMPLIFIERIC2 IC3 134383TRIM POT 100K OH

26、M 20%R195 R196 139079WIRE RES 1.5K 10% 5WR198 1392182.7 OHM 2W 5% WW RESISTOR FPR197 144081RES MF 68.1K 1% 1/4WR152 R192 144091RES MF 1.1K 1% 1/4WR2 R3 R167 R172 R191 144106RES 33.2K 1% 1/4WR165 R166 144120RES MF 402K 1% 1/4WR199 144128RES MF 1.5K 1% 1/4WR164 144130RES MF 10.2K 1% 1/4WR171 R189 R190

27、 R194 144157RES MF 10 1% 1/4WR138 144187RES MF 22.1K 1% 1/4WR177 R184 144191RES MF 1.21K 1% 1/4WR180 R187 144196RES MF 100 1% 1/4WR175 R181 R186 144265RES MF 2.21M 1/4WR178 R182 144379RES METAL FILM 4.75M 1/4W 1%R183 R188 144406METAL FILM RES 187K 1% 1/4WR4 R5 R179 R185 144418MF RES 121K 1% 1/4WR170

28、 R173 144421MF RES 221K 1% 1/4WR193 144422MF RES 1.5M 1% 1/4WR174 R200 178159FUSE HOLDER 5X20MM PCB MOUNTF1 049354 POWER GUARD LIGHTMETER LIGHTPANEL LAMP PCB 058120LAMP 14V #7373C1 C2 C3 C4 C5 C6 C9 C10 C11 C12 058133AMBER LEDDS7 DS8 058148RED LED HIGH EFFICIENCYDS20 117221MALE CONN 3 POS RT. ANGLEJ

29、10- 1172404 PIN RT. ANGLEJ1- J2- J3- J4- J5-J6- J7- J8- J9- 11724211 POS. RT ANGLEJ13 117274CONN. 2 POS. R-ANGLEJ11- J12- 2122 MC202 EXPLODED VIEW 24 EXPLODED VIEW PARTS LIST 23 1016411GLASS PANEL 2049320KNOB ASSEMBLY 3104017BLK FELT WASHER 40186115” ENDCAP 5101042TS 4-40 X 1/2 SLOT FILLISTER 600481

30、0EXTRUSION BRACKET 5” 7094360FOAM TAPE 1/2 X 1/2 8018588BOTTOM EXTRUSION 9101172TCS 6-32 X 1/4 PHIL FLAT U/C 10018587TOP EXTRUSION 11017363PLEXIGLAS FILTER LIGHT BLUE 12017711DISPLAY PLEXIGLAS 13004804SUBPANEL 14112092REVERSE LOCKING PCB SUPPORT 15049354LAMP PCB ASSY 16022315FISHPAPER SHIELD 1711407

31、2PLASTIC RIVET 18101054TS 6-32 X 1/4 PH PAN TAPTITE BLK 19112086NYLON SPACER 20102001KEP NUT 4-40 CADMIUM PLATE 21004805SWITCH BRACKET 22146243POWER SWITCH 23124077METER 24092341FILTER AZURE BLUE 25092342FILTER PALE BLUE 26017447PLASTIC LIGHT BOX 27004809TOP COVER 28101078TS 8-32 X 5/16 PHIL PAN BLK

32、 29005023TRAY 30078003RUBBER GROMMET 31106007SPRING CLIP: LATCH TYPE 32112038STL SPACER 4 X 3/8 NICKEL PLT 33112104BOARD MOUNT 34049352POWER SUPPLY METER PCB ASSY 35112102MOUNTING STRAPS 36049350OUTPUT TRANSFORMER 37049349POWER TRANSFORMER 38005024CHASSIS 39017218PLASTIC FEET-BLACK 40104063FLAT WASH

33、ER #10 CLEAR ZINC 41100159MS 10-32 X 3/4 PHIL PAN BLK ZINC 42104067LK WASH: INTERNAL STAR #10 43100120MS 10-32 X 1/4 PHIL PAN ZINC 44101176TCS 6-32 X 1/2 PH PAN BLK TYPE F 45074091AC TERMINAL BLOCK 46104001FLAT STEEL WASHER #4 X 9/32 X .025 47104004LK WASHER 5 X .255 INT STAR 48102022MN 4-40 3/16 X

34、3/16 49084135THERMAL PAD 50070139RECTIFIER BRIDGE 51102003MACH NUT 6-32 W/LOCK 52112103HEX SPACER 6-32 X 2.375 53049353DRIVER PCB ASSY 54104005STEEL WASHER: FLAT 6 X 3/8 X .032 55100255SEMS 6-32 X 3/8 PHIL PAN INTERNAL 56018617AMPLIFIER HEATSINK 57017160MOUNTING TAB W/ .140 DIA MTG 58084187ISOSTRATE

35、 59112087PCB SPACER 1/4” 60049346HEATSINK PCB ASSY 61101059SM 6 X 5/8 PHIL PAN TYPE A 62114118TRANSISTOR CLIP 218 63114119TRANSISTOR CLIP 214 64110009NUT M5 X 0.8 BRASS WITH GOLD PLATE 65104130LK #10 SPLIT PHOS/BRONZE 66104148FLAT WASHER BRASS 67084189DUAL BINDING POST RED 68084124DUAL BINDING POST

36、69102020MACH NUT 6-32 SELF-LOCK 70178161FUSE HOLDER 5 X 20mm IEC 71104016LK WASH: 1/2 X .630 X .022 INT STAR 72004800OUTPUT PLATE 73005022REAR PANEL 74117487AC LINE RECEPTACLE 75101197HI/LO 4-24 X 3/8 PHIL ROUND BLACK 76101114SM 4-24 X 1/2 PHIL PAN TYPE A 77017706TERMINAL COVER 78094332DOUBLE COATED

37、 MTG TAPE 1/8” THICK 79078017GROMMET 3/4 X 9/16 80104142LOCKWASHER 2.5mm INT STAR ZINC Ref No. Part No. Description REPACKING INSTRUCTIONS 25 POWER AMPLIFIER SERVICE MANUAL The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve

38、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 the within 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