McIntosh-MA6500-int-sm维修电路原理图.pdf

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1、SERVICE MANUAL INTEGRATED AMPLIFIER 1C 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 PE HE ADPH ON ES SE N SO R S TAN DB Y O N/ V O LU M E P O W E R G U A R D L EF TR IG HT T R EB L EB A SSB A LA N C E LR 20 200 2.0.20 .02 POWER OUTPUT -40 -30-20-10 0 DECIB ELS WATTS 400 20 2

2、00 2.0.20 .02 POWER OUTPUT -40 -30-20-10 0 DECIBELS WATTS 400 Performance Specifications . 2 Notes . 3 Rear Panel. 4 Section Location . 4 Block Diagram . 5 - 8 Interconnection Diagram . 9 - 10 Input Driver Schematic and PCB . 11 - 18 Heatsink Schematic and PCB . 19 - 20 Lamp Schematic and PCB . 19 -

3、 20 PG Display Schematic and PCB . 21 - 22 Control Schematic and PCB . 21 - 22 Tone Schematic and PCB . 23 - 26 Parts List. 25 - 28 Exploded View and Parts List. 29 - 31 Repacking Instructions . 33 CONTENTS RadioFans.CN 收音机爱好者资料库 PREFORMANCE SPECIFICATIONS POWER OUTPUT, STEREO 250, 200, 120 watts m

4、inimum sine wave continuous average power output per channel, both channels operat- ing, into a load impedance of 2, 4 and 8 ohms respec- tively. TOTAL HARMONIC DISTORTION 0.005% maximum at any power level from 250 milliwatts to rated power per channel from 20Hz to 20,000Hz, both channels operating.

5、 INTERMODULATION DISTORTION 0.005% maximum if instantaneous peak power output per channel does not exceed twice the rated output with both channels operating for any combination of frequencies from 20Hz to 20,000Hz. OUTPUT LOAD IMPEDANCE 2, 4 or 8 ohms RATED POWER BAND 20Hz to 20,000Hz DYNAMIC HEADR

6、OOM 2.4dB at 2, 4 or 8 ohms DAMPING FACTOR 60 at 2 ohms 120 at 4 ohms 230 at 8 ohms FREQUENCY RESPONSE +0, -0.5dB from 20Hz to 20,000Hz SIGNAL TO NOISE RATIO, (A WEIGHTED) Phono Input: 90dB (84dB IHF) below 10mV input High Level: 100db (90dB IHF) below rated output Power Amplifier: 110dB below rated

7、 output SENSITIVITY Phono: 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 output INPUT IMPEDANCE Phono: 47k ohms, 65pF High Level: 22k ohms MAXIMUM INPUT SIGNAL Phono: 90mV High Level: 8V POWER REQUIREMENT 120V, 50/60H

8、z, 5.0 Amps UL/CSA 230V, 50/60Hz, 2.5 Amps PREAMPLIFIER MAXIMUM VOLTAGE OUTPUT Phono: 90mV at tape output High Level: 8V at tape output Main Out: 8V at preamp output VOLTAGE GAIN High Level to Tape: 0dB High Level to Main: 20dB TONE CONTROLS Bass Control: +/-12dB at 20Hz Treble Control: +/-12dB at 1

9、0kHz POWER REQUIREMENTS 100 Volts, 50/60Hz at 4.8 Amps 110 Volts, 50/60Hz at 4.4 Amps 120 Volts, 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 MA6500 for the correct voltage. DIMENSIONS 17-1/2 inc

10、hes (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 of the mounting panel is 1-1/8 inches (2.9cm). 2 RadioFans.CN 收音机爱好者资料库 1. The heavy lines on the schematics denote the primary signal path. 2. U

11、nless otherwise noted, all voltages indicated on the schematics are measured under the following condi- tions: a. AC input at 120 volts, 50/60Hz b. All voltages are +-10% with respect to ground. A high impedance (10megaohm) voltmeter must be used. 3. Unless otherwise specified: a. Resistors values a

12、re 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 - Positive b. Diode - Cathode c. Others - Pin 1 5. The voltages enclosed in a box are signal voltages that are measured with a

13、2.5mV, 1kHz signal connected to both channels at the TUNER input jacks. NOTES MA6500 Front panel controls are set at: BALANCE .CENTER DETENT TREBLE BASS .CENTER DETENT INPUT SELECTORS. TUNER LOUDNESS . OFF POWER . ON VOLUME.FULLY CLOCKWISE MONO. OFF SPEAKER SWITCHES 1 AND 2. ON Rear panel controls a

14、re set at: PROCESSOR .OUT PWR AMP INPUT . INT SPEAKER TERMINALS . NO LOAD ON OUTPUTS 6. WARNING: Parts marked with the symbol have critical characteristics. Use ONLY replacement parts recom- mended by the manufacturer. 3 RadioFans.CN 收音机爱好者资料库 REAR PANEL SECTION LOCATIONS 120V 50/60Hz 4A T 10A L 25

15、0V SLO BLO PO W ER CO NTROL VIDEO SUM TUNER HO ME CD 2 TAPE PO W ER AMP IN POW ER AMP INPUT MAIN OUT TAPE O UT TAPEVIDEOCD 2CD 1G NDPH AUX/TUNER CD 1 EXT PH INT AUX AUX EXT SENSOR D ATA PORTSIN PU TS M A 6 5 0 0 IN T E G R AT E D A M P L IF IE R SERIAL NUMBER McINTOSH LABORATORY, INC., BINGHAMTON, N

16、EW YORK MADE IN USA LLL RRR RIGHTRIGHTLEFTLE FT W ARN IN G AVIS SHOCK HAZARD - D O NOT O PEN. FOR CO NTINUED PRO TECTION AGAINST FIREHAZARD REPLACE ONLY W ITH SAME TYPE AND RATING FUS E. RISQ UE DE CHOC - ELECTRIQ UE - NE PAS O UVRIR. REMPLAC ER PAR U N FUSIBLE DEME ME TYPE , AMPERAGE E T VOLTAG E.

17、W AR N IN G AVIS RISK OF HAZA RDO US ENE RGY! MAK E PRO PER SPEAKER CONNEC TIONS.SEE OPER ATIN G M ANU AL BEFO R E U SIN G. ENERG IE ELECTRIQ U E DA NGERE USE! V OIR LE CAH IER DINSTRU CTION. IN P UT/D R IVER PC B 2 H EAT SINK PC B 3 TO NE PC B 7 4 LAM P PC B 65 C O N T RO L PC B PG D ISPLAY PC B 4

18、RadioFans.CN 收音机爱好者资料库 BLOCK DIAGRAM 56 MA6500 20dB AMP 20dB AMP SUPER TRACKING VOLUME CONTROL SUPER TRACKING VOLUME CONTROL MONO SWITCHING LOUDNESS COMPENSATION CONTROL LOUDNESS COMPENSATION CONTROL MONO SWITCHING BALANCE CONTROL BALANCE CONTROL TONE AMP TONE AMP TURN-ON DELAY TONE CONTROLS MATCHI

19、NG NETWORK INPUT ELECTRO- MAGNETIC SWITCHING INPUT ELECTRO- MAGNETIC SWITCHING INPUT ELECTRO- MAGNETIC SWITCHING DATA PORT REGISTER MICRO CONTROLLER INPUT SELECTOR LOGIC IR SENSOR R IAA AMP R IAA AMP OUTPUT MUTING OUTPUT MUTING HEAD- PHONE AMP HEAD- PHONE AMP AUX TUNER VIDEO TAPE CD1 CD2 TUNER VIDEO

20、 AUX TAPE PHONO PHONO AUX TUNER SUM CD1 CD2 VIDEO TAPE HOME OUTPUT MUTING LOGIC HEAD PHONE RIGHT CHANNEL INPUTS DATA PORTS CD1 CD2 LEFT CHANNEL INPUTS POWER CONTROL EXT IR SENSOR TO PREAMP IN (INT) PREAMP OUT LEFT TO PREAMP IN (INT) PREAMP OUT RIGHT POWER TRANSFORMER RECTIFIERS AND FILTERS LAMP FUSE

21、 FRONT PANEL LAMPS MAIN RELAYS MAIN SUPPLY -15V REGULATOR 15V REGULATOR 5.6V REGULATOR LAMP CONTROL LOGIC B- B+ 11.5VAC -15V 15V 5.6V THERMAL PROTECTION 120VAC 50/60Hz MAIN FUSE IN RUSH CURRENT LIMITER RadioFans.CN 收音机爱好者资料库 BLOCK DIAGRAM 78 NEGATIVE CURRENT LIMITER POSITIVE CURRENT LIMITER CURRENT

22、 SOURCE PREDRIVER POWER GUARD DRIVER OUTPUT DC BIAS PREDRIVER DRIVER OUTPUT ELECTRONIC ATTENUATOR LEFT PG INDICATOR NEGATIVE FEEDBACK VOLTAGE LOG AMP POSITIVE CURRENT LIMITER OUTPUT DRIVER PREDRIVER DC BIAS CURRENT SOURCE PREDRIVER DRIVER OUTPUT PG INDICATOR DRIVER POWER AMP INPUT SWITCH NEGATIVE CU

23、RRENT LIMITER VOLTAGE LOG AMP NEGATIVE FEEDBACK DIFF AMP CASCODE VOLTAGE AMP CASCODE VOLTAGE AMP CASCODE VOLTAGE AMP DIFF AMP DIFF AMP DIFF AMP POWER GUARD PG DRIVER RIGHT PG INDICATOR ELECTRONIC ATTENUATOR POWER AMP INPUT SWITCH TO PRE AMP OUT (INT) PRE AMP IN (EXT) TO PRE AMP OUT (INT) CASCODE VOL

24、TAGE AMP RECTIFIER RECTIFIER DC AMP DC AMP + - - + LEFT METER RIGHT METER SPEAKER SWITCHING TURN ON DELAY THERMAL PROTECTION SPEAKER SWITCHING SPEAKER 2 SPEAKER 1 LEFT OUTPUT SPEAKER 2 SPEAKER 1 RIGHT OUTPUT PRE AMP IN (EXT) TO MICRO CONTROLLOR PRE AMP LEFT (INT) PRE AMP RIGHT (INT) RadioFans.CN 收音机

25、爱好者资料库 INTERCONNECT 9100 MA6500 RadioFans.CN 收音机爱好者资料库 INPUT DRIVER 049193 SH 1 OF 3 1112 2 RadioFans.CN 收音机爱好者资料库 INPUT DRIVER 049193 SH 2 OF 3 1314 MA6500 2 RadioFans.CN 收音机爱好者资料库 INPUT DRIVER 049193 SH 3 OF 3 1516 2 RadioFans.CN 收音机爱好者资料库 INPUT DRIVER 1718 MA6500 2 RadioFans.CN 收音机爱好者资料库 HE

26、ATSINK 049194 LAMP 049235 1920 3A3B 4B4A RadioFans.CN 收音机爱好者资料库 CONTROL 049195 PG DISPLAY 049236 2122 MA6500 5 6 RadioFans.CN 收音机爱好者资料库 TONE 049268 23240 7 RadioFans.CN 收音机爱好者资料库 066462ELECT CAP 1O UF 100VDC AMMOC35 C36 C37 C38 066469ELECT CAPACITOR 470MF 50V T&RC176 066504CAPACITOR ELECT 25000UF

27、 75VC142 C143 070047SILICON DIODE 1N4148 T&RD1 D3 D4 D5 D6 D7 D8 D9 D10 D21 D22 D25 D26 D27 070130ZENER DIODE 8.2V,1/2WD2 070131DIODE RECTIFIERD11 D12 D13 D14 D15 D16 D23 D24 070139RECTIFIER BRIDGE MC1000D28 087050REED RELAY FORM 1A,5V,500 OHMSK2 K3 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K16 K17 K18 K20

28、087057RELAYK1 K21 087069POWER RELAY TV5 24VK24 087072RELAY 24V TV8/VDE CERTIFIEDK22 K23 089089FUSE 2A SLO-BLO 5X20F1 1172154-PIN CONNECTORJ3 J8 117219MALE CONN 10 POSJ1 117244FRICTION LK CONN 9POS MALEJ6 J7 11727911-POS. MALE CONN.J2 117404HEADER 2-PIN 0.156J4 J5 117436PJ261G PHON JACK, GOLDJ23 1174

29、55PHONO JACK 8P, GOLD PLATEDJ21 J22 117494MINI JACKJ28 117549HEADPHONE JACK DUAL BLACK 1/8J24 J25 J26 J27 117708FASTON BLADE W/FEETJ10 J11 J12 J13 J14 J15 J16 J17 J18 J19 J2 117712FASTON BLADE .110J20 117717MTA-156 HEADER 8PINJ9 122297CHOKE OUTPUT .65UHL2 L3 132172TRANSISTOR SI PNP MPSA55Q50 132193T

30、RANSISTOR J.F.E.T. 2N4392Q62 Q64 132223TRANSISTOR NPN MPS4124 2K/REELQ44 Q46 Q47Q57 Q58 Q59 Q61Q63 Q66 Q75 Q78 Q79 Q80 Q81 Q83 Q87 Q88 132224TRANSISTOR PNPQ1 Q40 Q48 Q49 Q52 Q69 Q73 Q74 Q76 Q77 132254TRANSISTOR NPNQ54 Q55 Q56 Q67 Q68 Q71 Q85 Q86 132255TRANSISTOR PNPQ2 Q51 Q53 Q65 Q70 Q72 132261TRANS

31、ISTOR PNPQ18 Q82 132262TRANSISTOR NPNQ17 Q84 133028IC OPERATIONAL AMPLIFIERIC1 IC3 133067NE5534AN OP AMP LOW NOISEIC16 IC17 133108IC +5V REGULATORIC5 133153IC REGULATOR -15VIC6 133154IC REGULATOR 15VIC7 133175IC AND 2 INPUT X 4IC14 133180LB1720 8 LN DRIVER ARRAYIC10 IC13 133186IC SHFT REG SER-PARIC9

32、 IC11 IC12 133260DUAL OPERATIONAL AMPLIFIERIC2 IC4 IC15 133360OCTAL DAR TRANS ARRAY W/DIODEIC8 134389TRIM POT 100K,10%,3/8SQ.R237 R238 137042FLAMEPROOF RES 47 OHM 5% 1/4WR56 R60 141165RES CF 10 5% 1/2WR77 R79 R119 R230 R231 R232 144053RES MF 10K 1% 1/4WR122 R134 R171 R217 R218 144071METAL FILM RES 3

33、65 OHM 1% 1/4WR265 R266 R267 R268 R269 R270 R271 R272 144086METAL FILM RES 475 OHM 1% 1/4WR45 R167 R168 R187 144090METAL FILM RES 1K 1% 1/4WR36 R164 R170 R184 R241 R242 R249 R255 R262 R263 R264 144095RES MF 3.32K 1% 1/4WR41 R55 R188 R193 PART NODESCRIPTIONREFERENCE NO 049193 INPUT DRIVER 003611CARD

34、MOUNTING BRACKETSP1 SP2 061196DISC CAP 47PF,20%,N470 50VC146 C152 C157 C159 061199DISC CAP 100PF 10% N1500 50VC58 C61 C72 C73 C74 C75 C76 C78 C140 C141 C156 C158 061248DISC CAP .1MF,25V,Y5TC32 C33 C55 061268MONO CAP .1UF,50V,Z5UC62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C161 C162 C171 C172 061273220PF

35、5% 100V NPOC173 C174 C175 064254M POLY FILM CAP .1MF,10%,100VC129 064267M. POLYESTER CAP .22MF,400VC145 064312CAP M POLY .01UF 5% 63VDCC165 C167 064318CAP M POLY .033UF 5% 63/100VDCC166 C168 064364CAP POLYPROP .047MF 10% 250VC47 C144 066269CAP ELECT 1UF 10% 50VC115 C116 066309CAP ELECT 1000UF 10VC13

36、2 066330CAP ELECT 220UF 16V SHORT CANC163 C164 066344CAP ELECT 100UF 25VC133 C134 066360CAP ELECT 3300UF 35VC125 C127 C128 066361CAP ELECT 1000UF 20% 35VC126 066445ELECT CAP 10MF, 50V AMMO PACKC30 C85 C86 C87 C88 C89 C90 C91 C93 C94 C95 C96 C97 C98 C99 C100 C102 C103 C104 C105 C106 C115 C117 C118 C1

37、23 C124 C153 C154 C177 066446ELECT CAP 47MF, 35V AMMO PACKC92 C101 066447ELECT CAP 100MF 16V AMMO PACKC22 C40 C119 C120 C121 TONE 049268 PARTS LIST 25 26 MA6500 7 RadioFans.CN 收音机爱好者资料库 144097METAL FILM RES 4.75K 1% 1/4WR46 R86 R177 R222 R227 R233 R234 144107METAL FILM RES 40.2K 1% 1/4WR161 R192 14

38、4108RES MF 47.5K 1% 1/4WR29 R62 R65 R66 R69 R175 R181 R182 R247 R251 144113RES MF 100K 1% 1/4WR100 R162 R196 R228 144119METAL FILM RES 332K 1% 1/4WR221 R226 144125METAL FILM RES 150K 2% 1/4WR169 R190 144127METAL FILM RES 95.3K 1% 1/4WR248 R257 144141METAL FILM RES 27.4K 1% 1/4WR219 R223 144154RES MF

39、 12.1K 1% 1/4WR128 R172 144160METAL FILM RES 22.1OHM 1% 1/4WR152 R156 144172RES MF 221 OHMS 1% 1/4WR51 R53 R145 R146 R160 R186 R239 R240 144187METAL FILM RES 22.1K 1% 1/4WR104 R105 144191RESISTOR MF 1.21K 1% 1/4WR38 R101 R159 R173 144196METAL FILM RES 100 OHM 1% 1/4WR67 R68 R136 R137 R138 R139 R140

40、R141 R142 R144 R150 144210RES MF 7.5K 1% 1/4W CRB1/4FXR245 R253 14422095.3 OHMS 1% 1/4W MFR246 R256 144225MF RES, 30K OHM 1% 1/4WR147 R148 R258 R259 144262RES NETWORK, 2X220K, ISOR1 R2 R3 R4 R5 R6 R7 R154 R243 144264METAL FILM RES 10M 1% 1/4WR220 R224 144265METAL FILM RES 2.21M 1/4WR225 R229 144273R

41、ESISTOR MF 182 OHM 1/4W 1%R157 R205 144338RES MF 324 OHM 1% 1/4WR163 R194 144378RES MF 2.21 OHM 1/4W 1%R250 R252 144440MF RES 14.3K 1% 1/4WR50 R165 144441METAL FILM RES 274K 1% 1/4WR52 R158 R176 R178 R179 R195 144442METAL FILM RES 47.5 1% 1/4WR244 R254 144443METAL FILM RES 681K 1% 1/4WR30 R37 R83 R1

42、66 R174 148059SLIDE SWITCHS1 S2 178159FUSE HOLDER 5X20MM PCB MOUNTF1 049194 HEATSINK 061023DISC CAP 100PF 10% N1500C7 C8 061159CERAMIC CAP .01MF +80-20% 50VC9 C16 061248DISC CAP .1MF,25V,Y5TC3 C5 064363CAP POLYPROP 0.15MF 10% 250VDCC10 066446ELECT CAP 47MF, 35V AMMO PACKC1 C2 070047SILICON DIODE 1N4

43、148 T&RD1 D2 D3 D4 D5 070133DIODE 200V,6AD6 D7 1172132-PIN MALE CONNECTORJ3 117244FRICTION LK CONN 9POS MALEJ1 117404HEADER 2-PIN 0.156J2 132223TRANSISTOR NPN MPS4124 2K/REELQ1 132224TRANSISTOR PNPQ2 132261TRANSISTOR PNPQ7 132262TRANSISTOR NPNQ6 134390TRIM POT 200 OHM 20% HORIZ ADR13 137093MET OX 68

44、0 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 R37 R38 144053RES MF 10K 1% 1/4WR3 R10 144172RES MF 221 OHMS 1% 1/4WR1 R8 144279THERMISTOR 100 OHMRT1 144378RES MF 2.21 OHM 1/4W 1%R30 049195 CONT

45、ROL 058153INCANDESCENT LAMP 14V 100MADS13 DS14 DS15DS16 DS17 DS18 061268MONO CAP .1UF,50V,Z5UC3 C5 C6 C7 C10 061273220PF 5% 100V NPOC8 C9 061277MONO CAP 0.1MF 20% 50VC1 066254CAP ELECT 220UF 50V 20%C2 066330CAP ELECT 220UF 16V SHORT CANC4 070093LED LAMP REDDS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS9 DS10 DS

46、11 DS12 117216MALE CONN 5-PIN 0.1 POST ASSYJ4 11727911-POS. MALE CONN.J1 117462PHON JACK 1 1/8” STEREO VERJ3 121031IR SENSOR 38KHZMT1 133175IC AND 2 INPUT X 4IC1 133186IC SHFT REG SER-PARIC3 IC4 133191IC DC MOTOR DRIVERIC2 133241IC MICROPRCSSR RESET POSIC6 133394PROGRAMMED DEVICE 144053RES MF 10K 1% 1/4WR5 R16 1440