McIntosh-MA6900-int-sm维修电路原理图.pdf

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1、SERVICE MANUAL Performance Specifications . 2 Notes . 2 Rear Panel . 3 Section Location . 4 Block Diagram . 5 - 6 Interconnection Diagram . 7 - 8 Main Schematic and PCB. 9 - 18 Balanced Schematic and PCB. 12, 18 Heatsink Schematic and PCB . 19 - 20 Capacitor Schematic and PCB . 21 - 22 Control Schem

2、atic and PCB . 23 - 26 Lamp Schematic and PCB . 25 - 26 Tone Schematic and PCB . 27 - 31 Keyboard Schematic and PCB . 30 - 32 Parts List . 33 - 36 Exploded Views and Parts Lists . 37 - 40 Repacking Instruction . 41 CONTENTS INTEGRATED AMPLIFIER RadioFans.CN 收音机爱 好者资料库 PERFORMANCE SPECIFICATIONS 2 1.

3、 The heavy lines on the schematic denote the primary signal path. 2. Unless 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) voltm

4、eter must be used. 3. Unless otherwise specified: a. Resistor values are 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 Pa

5、rts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer. NOTES Power Output Minimum sine wave continuous average power output per channel, all channels operating is: 200 watts into 2 ohm load 200 watts into 4 ohm load 200 watts into 8 oh

6、m load Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is: 0.005% for 2, 4 or 8 ohm loads Dynamic Headroom 2.4dB Frequency Response +0, -0.5dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 100,00

7、0Hz 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 Signal To Noise Ratio (A Weighted) 90dB (84dB IHF) below 10mV input, Phono Input 100dB (90dB IHF) below rated output, High Level 110dB below

8、rated output, Power Amplifier Intermodulation Distortion Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz, with all channels operating is: 0.005% for 2, 4 or 8 ohm loads Input

9、Impedance Phono, 47k ohms, 65pF High Level, 22k ohms Maximum Input Signal Phono, 90mV High Level, 8V Preamplifier Maximum Voltage Output Phono, 8V 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 Wide Band Dampin

10、g Factor Greater than 40 Power Requirements 100 Volts, 50/60Hz at 4.8 amps 110 Volts, 50/60Hz at 4.4 amps 120 Volts, 50/60Hz at 4.2 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 MA6900 for the correct voltage. O

11、verall Dimensions Front Panel: 17-1/2 inches (44.45cm) wide, 7-1/8 inches (18.10cm) high. Depth behind front mounting panel is 16-1/2 inches (41.91cm). Clearance required in front of the Front Panel is 1 inch (2.54cm) for knobs. Weight 74.5 pounds (33.8 Kg) net, 92.5 pounds (41.7 Kg) in shipping car

12、ton RadioFans.CN 收音机爱 好者资料库 3 MA6900 REAR PANEL RadioFans.CN 收音机爱 好者资料库 4 SECTION LOCATIONS BOTTOM VIEW WITH COVER REMOVED TOP VIEW WITH COVER REMOVED RadioFans.CN 收音机爱 好者资料库 BLOCK DIAGRAM 5 6 MA6900 RadioFans.CN 收音机爱 好者资料库 78 INTERCONNECT1 TB1 RadioFans.CN 收音机爱 好者资料库 91110 MAIN 049688 1 OF 3 MA6900

13、 2 RadioFans.CN 收音机爱 好者资料库 121413 MAIN 049688 2 OF 32 BALANCED3 RadioFans.CN 收音机爱 好者资料库 15 MAIN 049654 3 OF 3 2 MA6900 16 RadioFans.CN 收音机爱 好者资料库 18 3 BALANCED 049654B MAIN 0496542 17 RadioFans.CN 收音机爱 好者资料库 MA6900 1920 HEATSINK 049665 4A 4B RadioFans.CN 收音机爱 好者资料库 2122 CAPACITOR 0496535 RadioFans.C

14、N 收音机爱 好者资料库 2324 CONTROL 0496556 MA6900 RadioFans.CN 收音机爱 好者资料库 2526 CONTROL PCB 0496556 LAMP 0492357A 7B RadioFans.CN 收音机爱 好者资料库 TONE 049656 MA6900 8 272928 RadioFans.CN 收音机爱 好者资料库 TONE 049656 KEYBOARD 049696 8 9 303231 RadioFans.CN 收音机爱 好者资料库 3334 PARTS LIST MA6900 Part No.DescriptionReference No

15、. Interconnect F1FUSE08910400 MT1 MT2METER12707700 RT1 RT2THERMISTOR05200800 S1SWITCH14807300 T1POWER TRANSFORMER04967600 T2 T3OUTPUT TRANSFORMER04967500 TB1TERMINAL BLOCK07409100 049654 MAIN PCB C1 C2 C69 C70 C71 C72 C73 C74 C75 C76CAP ELECT 10UF 16V06638200 C3 C4 C9 C10 C11 C12 C47 C48 C49CAP MONO

16、 100PF 100V 10%06130000 C5 C6 C93 C94CAP ELECT 47UF 35V06644600 C7 C8CAP DISC .47UF 50V MONO06124900 C13 C14CAP POLY .15UF 10% 250V06436300 C15 C16CAP POLY .047UF 10% 250V06436400 C17 C18CAP MPOLY .0068UF 5% 63VDC06431000 C19 C20 C21 C22 C23 C24 C27 C28 C31CAP ELECT 10UF 100VDC06646200 C25 C26 C29 C

17、30 C38 C41 C42 C55 C56CAP MONO .1UF 50V 20% Z5U06130500 C33 C34 C39 C40 C43 C44 C45 C46 C53CAP ELECT 10UF 50V06644500 C35 C36CAP ELECT 1UF 50V06651000 C50 C51 C52 C59 C60 C91 C92CAP MONO 100PF 100V 10%06130000 C54 C77 C78 C87 C88CAP ELECT 10UF 50V06644500 C57 C58 C89 C90CAP MONO 47PF 200V 10%0612990

18、0 C61 C62CAP M POLY .033UF 5% 63VDC06431800 C63 C64CAP M POLY .01UF 5% 63VDC06431200 C65 C66 C118 C119CAP ELECT 220UF 25V06650700 C67 C68 C95 C96 C97 C98 C99 C103CAP MONO .1UF 50V 20%06130500 C79 C80 C81 C82 C83 C84 C85 C86CAP ELECT 10UF 16V06638200 C100 C101 C102CAP MONO 220PF 100V 10%06130100 C104

19、 C105 C107 C110 C114CAP MONO .1UF 50V 20% Z5U06130500 C106CAP ELECT 470UF 50V06646900 C108 C113CAP ELECT 1000UF 25V06651300 C109 C112 C116CAP ELECT 3300UF 35V06650900 C111 C115CAP ELECT 100UF 25V06644700 C117CAP M POLY .1UF 10% 100VDC06425400 D1 D2 D3 D4 D5 D6 D7 D8 D11 D12DIODE SILICON07004700 D9 D

20、10DIODE ZENER 16V 5% 500MW07011400 D13 D14 D15 D16 D17 D18 D19 D20DIODE RECTIFIER07013100 D21 D23 D24DIODE SILICON07004700 D22DIODE ZENER 8.2V 1/2W07013000 F1FUSE 2A SLO-BLO 5X2008908900 F1 F2 F3HLDR FUSE 5X20MM PCB MNT17815900 F2 F3FUSE 5X20 1.6A IEC SLO-BLO08909600 IC1IC NAND 2 INPUT X 413316100 I

21、C2 IC3 IC16IC OPERATIONAL AMPLIFIER13302800 IC4 IC5IC OPRTINL AMP LOW NOISE13306700 IC6 IC7 IC17IC DUAL OPERATIONAL AMP13326000 IC8 IC10 IC12IC SHFT REG SER-PAR13318600 IC9IC OCTAL DAR TRNS ARRY13336000 IC11 IC13IC 8 LN DRIVER ARRAY13318000 IC14 IC15IC AND 2 INPUT X 413317500 J1 J2CONN MALE 7 PIN117

22、21700 J3 J4 J6CONN 4 PIN11721500 J5CONN 23PIN FFC11771500 J7CONN MALE 3 POS MTS100 NRML11721400 J8CONN 8 POS MALE FRCTION LK11727500 J9 J10 J11 J12 J13BLADE FASTON W/FEET11770800 J14 J15RECEPTACLE XLR FEMALE11768500 J16 J17 J18RCA JACK 3X2 WHT/RED 14MM11779000 J19 J20 J21 J22 J23 J24JACK HDPHNE DUAL

23、 BLACK 1/811754900 J25CONN GOLD F RIGHT ANGLE11766100 J26 J27CONN MALE 5 PIN 0.1 POST11721600 K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11RLY REED FORM 1A 5V 500OHMS08705000 K12 K13 K14 K15 K16 K17 K18RLY REED FORM 1A 5V 500OHMS08705000 K19RELAY POWER TV5 24V08706900 LDR1 LDR2LDR NETWORK VTL5C914417900 Q1 Q2

24、Q3 Q4TRANSISTOR N JFET13222200 Q5 Q6 Q7 Q8 Q19 Q20TRANSISTOR NPN13225400 Q9 Q10 Q11 Q12 Q13 Q14TRANSISTOR PNP 120V13225500 Q15 Q16 Q27 Q28 Q29 Q30 Q37 Q38 Q48TRANSISTOR PNP13222400 Q17 Q18 Q21 Q22 Q23 Q24 Q25 Q31 Q33TRANSISTOR NPN 2K/REEL13222300 Q34 Q41 Q42 Q43 Q44 Q46 Q52 Q53TRANSISTOR NPN 2K/REEL

25、13222300 Q35 Q36TRANSISTOR PNP 2SA32IC13228600 Q39 Q40TRANSISTOR NPN 25C3334C13228500 Q45 Q47TRANS POWER N-CHN ENHANCE13224200 Q49IC REGULATOR +5V13310800 Q50IC REGULATOR -15V13315300 Q51IC REGULATOR 15V13315400 Q54TRANS P CHAN JUNCTION FET13222600 R1 R2 R23 R24 R26 R61 R62 R91 R92RES MF 10K 1% 1/4W

26、14405300 R3 R4 R49 R50 R53 R54 R84 R171RES MF 3.32K 1% 1/4W14409500 R5 R6 R15 R16RES MF 475 1% 1/4W14408600 R7 R8 R93 R94RES MF 10M 1% 1/4W14426400 R9 R10 R11 R12 R113 R114 R170RES MF 47.5K 1% 1/4W14410800 R19 R20 R137 R141 R146 R147 R151RES MF 1K 1% 1/4W14409000 R21 R22 R77 R78 R79 R80 R155RES MF 1

27、00 1% 1/4W14419600 R25RES MF 165K 1% 1/4W14411600 R27RES MF 68.1K 1% 1/4W14408100 R29 R30 R63 64 R101 R102RES MF 4.75K 1% 1/4W14409700 R35 R36 R37 R38RES MF 806 1% 1/4W14408900 R39 R40 R59 R60RES MF 187K 1% 1/4W14440600 R41 R42 R43 R44 R45 R46 R47 R48 R132RES MF 221 1% 1/4W14417200 R51 R52 R55 R56 R

28、57 R58 R65 R66RES MF 324 OHM 1% 1/4W14433800 R67 R68RES 1.8 OHM 2W 5% WW FP13923000 R69 R70RES WW 2.7 OHM 2W 5% FP13921800 R71 R72RES MF 27.4K 1% 1/4W14414100 R73 R74 R75 R76RES FP 47 OHM 5% 1/4W13704200 R81 R83 R166 R167RES MF 12.1K 1% 1/4W14415400 R82 R87RES MF 2.1K 1% 1/4W14429900 R85RES MF 20K 1

29、% 1/4W14410400 R86 R89 R90 R111 R129 R145RES MF 100K 1% 1/4W14411300 R95 R96RES MF 274K 1% 1/4W14444100 R97 R98POT TRIM 100K OHM13450200 R99 R100RES MF 2.21M 1/4W14426500 R103 R104 R105 R106RES MF 11K 1% 1/4W14410100 R107 R108 R109 R110RES MF 5.62K OHM 1% 1/4W14444700 R112 R125 R126 R127 R128 R130 R

30、131RES NETWORK 2X220K ISO14426200 R115 R116RES MF 47.5 1% 1/4W14444200 R117 R118RES MF 95.3K 1% 1/4W14412700 R119 R120 R172RES MF 7.5K 1% 1/4W14421000 R121 R122RES MF 95.3 1% 1/4W14422000 R123 R124RES MF 2.21 OHM 1/4W 1%14437800 R13 R14 R17 R18 R31 R32 R33 R34RES MF 267K 1% 1/4W14411800 R133 R134 R1

31、35 R138 R139RES MF 221 1% 1/4W14417200 R136 R140RES NET 2 X 22K ISOLATED14436600 R142 R143RES MF 30.1K 1% 1/4W14422500 R144 R148RES NETWORK 2X220K ISO14426200 R149 R150RES MF 22.1 1% 1/4W14416000 R152 R153RES MF 1K 1% 1/4W14409000 R154RES NETWORK 8X100 ISO14427500 R156 R157 R158 R159 R160 R161 R162R

32、ES MF 182 1/4W 1%14427300 R163RES MF 182 1/4W 1%14427300 R164 R165RES MF 178K 1% 1/4W14442000 R168RES MF 3.65K 1% 1/4W14418900 R169RES MF 3.16K 1% 1/4W14419900 R173RES MF 5.11K 1% 1/4W14408300 S1SWITCH SLIDE14805900 SP1 SP2BRACKET PCB CARD MOUNTING00361100 RadioFans.CN 收音机爱 好者资料库 3536 PARTS LIST con

33、t Part No.DescriptionReference No. 049665 HEATSINK PCB C1 C2CAP ELECT 47UF 35V06644600 C3 C5CAP MONO .1UF 50V 20% Z5U06130500 C7 C8CAP MONO 100PF 100V 10% NPO06130000 C9 C16CAP MONO .01UF 50V 20% X7R06130400 C10CAP POLYPROP 0.15UF 10% 250VDC06436300 D1 D2 D3 D4 D5DIODE SILICON07004700 D6 D7DIODE 200

34、V 6A07013300 J1-CONN MALE 7 PIN11721700 J2-CONN HEADER 2 PIN 0.15611740400 J4BLADE FASTON W/FEET11770800 J4-CONN MALE 2 PIN11721300 Q1TRANSISTOR NPN SILICON13217100 Q2TRANSISTOR PNP SILICON13217200 Q6TRANSISTOR NPN13226200 Q7TRANSISTOR PNP13226100 R1 R8RES MF 221 1% 1/4W14417200 R2 R9RES MET OX 680

35、5% .5W13709300 R3 R10RES MF 15K 1% 1/4W14441200 R6 R11RES MET OX 1.8K 5% .5W13709400 R7RES MET OX 430 5% .5W13709500 R12RES MET OX 47 5% .5W13709600 R13POT TRIM 200 OHM 20% HORIZ AD13439000 R30RES MF 2.21 OHM 1/4W 1%14437800 R31 R32 R33 R36 R37 R38RES WW .5 OHM 5W 5%13917700 RT1SENSOR THERMAL1442490

36、0 049653 CAPACITOR PCB C1 C2CAP ELECT 25000UF 75V06650400 C3CAP M POLY .22UF 20% 400VDC06426700 D1 D2DIODE SILICON07004700 D3DIODE BRIDGE RECTIFIER07013900 J1CONN MALE 3 POS MTS100 NORMAL11721400 J2 J3CONN HEADER 2 PIN 0.15611740400 J4 J5 J6 J7 J8 J9BLADE FASTON W/FEET11770800 K1 K2RELAY 24V TV8/VDE

37、 CERTIFIED08707200 049655 CONTROL PCB C3 C5 C6 C7 C10CAP MONO .1UF 50V 20% Z5U06130500 C4CAP ELECT 220UF 25V06650700 C8 C9CAP MONO 220PF 100V 10% NPO06130100 DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS9LED LAMP RED07009300 DS10 DS11 DS12LED LAMP RED07009300 DS13 DS14LED AMBER05813300 DS15 DS16 DS17 DS18 DS19

38、 DS20LAMP INCANDESCENT 14V 100MA05815300 DS21 DS23LAMP INCANDESCENT 14V 100MA05815300 IC1IC AND 2 INPUT X 413317500 IC2IC DC MOTOR DRIVER13319100 IC3 IC4IC SHFT REG SER-PAR13318600 IC5IC PROGRAMMED13343800 IC5SOCKET IC 24-PIN17813900 IC6IC MICRO RESET POS13324100 J1CONN 23PIN FFC11771500 J6CONN 12 P

39、IN FFC11772000 J7 J8CONN 4 PIN11721500 R2RES MF 100K 1% 1/4W14411300 R3RES MF 75 OHM 1% 1/4W14444400 R4RES MF 10 1% 1/4W14415700 R5 R16RES MF 10K 1% 1/4W14405300 R6RES NETWORK 3X10K BUSSED14429000 R7 R8 R9 R10 R11 R12 R13 R20 R21RES MF 324 OHM 1% 1/4W14433800 R14 R15RES MF 1K 1% 1/4W14409000 R19RES

40、MF 2.21 OHM 1/4W 1%14437800 Y1RESONATOR CERAMIC 6.0MHZ W/CAP18003900 049235 LAMP PCB DS1 DS2 DS3LAMP 14V #737305812000 J14 PIN RT. ANGLE11724000 J2CONN. 2 POS. R-ANGLE11727400 049656 TONE PCB C1 C2CAP M POLY .1UF 10% 100VDC06425400 C3 C4CAP ELECT 10UF 16V (4X5 CASE)06638200 C5 C6CAP MONO 220PF 100V

41、10% NPO06130100 C7 C8CAP MONO 47PF 200V 10% NPO06129900 C9 C10CAP MONO 22PF 200V 10% NPO06129800 C11 C12CAP ELECT 220UF 25V06650700 C13 C14 C33 C34CAP ELECT 47UF 50V06621500 C15 C16 C43 C44 C45 C46 C54CAP ELECT 10UF 50V06644500 C17 C18CAP M POLY .047UF 5% 63VDC06432000 C19 C20CAP ELECT 1.5UF 10% 50V

42、06627100 C21 C22CAP M POLY .01UF 5% 63VDC06431200 C23 C24CAP M POLY .47UF 5% 50/63VDC06433300 C25 C26CAP MPOLY .0033UF 5% 63VDC06430600 C27 C28CAP M POLY .15UF 5% 63VDC06432700 C29 C30CAP POLY 0.001MF 5% 63VDC06430000 C31 C32CAP M POLY .033UF 5% 63VDC06431800 C35 C36 C37 C38CAP M POLY .22UF 5% 63VDC

43、06432900 C39 C40 C41 C42CAP MONO 470PF 100V 10% NPO06130200 C47 C48 C49 C50 C51 C52CAP MONO .1UF 50V 20% Z5U06130500 C53CAP ELECT 47UF 10V BP06637800 D1 D2DIODE SILICON07004700 IC1 IC6 IC7IC DUAL OPERATIONAL AMPLIFIER13326000 IC2 IC3 IC4 IC5IC OPERATIONAL AMPLIFIER13302800 J1CONN 8 POS MALE FRICTION

44、 LOCK11727500 J2CONN 4 PIN11721500 J3CONN MALE 6 POS RT ANGLE11770700 K1 K2 K3RELAY REED FORM 1A 5V 500 OHMS08705000 R1POT 50KAX213449000 R2POT BALANCE 2KOHM13446400 R3 R4 R5 R6 R7POT EQUAL13445700 R9 R10RES MF 2.21K 1% 1/4W14429800 R11 R12RES MF 3.32K 1% 1/4W14409500 R13 R14RES MF 475K 1% 1/4W14436

45、400 R15 R16 R19 R20RES MF 1K 1% 1/4W14409000 R17 R18RES MF 10K 1% 1/4W14405300 R21 R22 R45 R46RES MF 2.74K 1% 1/4W14430400 R23 R24 R27 R28 R31 R32 R35 R36RES MF 681 1% 1/4W14419500 R25 R26R29 R30 R33 R34 R37 R38 R43RES MF 100K 1% 1/4W14411300 R39 R40RES MF 475 1% 1/4W14408600 R41 R42RES MF 40.2K 1%

46、1/4W14410700 R44 R51 R52RES MF 100K 1% 1/4W14411300 R47 R48RES MF 33.2K 1% 1/4W14401500 R49 R50RES MF 22.1 1% 1/4W14416000 R53 R54RES MF 100 1% 1/4W14419600 R55 R56 R57 R58RES MF 10 1% 1/4W14415700 049696 KEYBOARD PCB C1CAP MONO .1UF 50V 20% Z5U06130500 C2CAP ELECT 47UF 35V06644600 J3JACK PHONO 1/8

47、STEREO VER11746200 J4CONN 4 PIN11721500 J5CONN 12 PIN FFC11772000 MT1GASKET SENSOR09437700 MT1RECEIVER IR12104100 R1RES MF 100 1% 1/4W14419600 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12SWITCH TACT15005800 RadioFans.CN 收音机爱 好者资料库 38 EXPLODED VIEW 37 MA6900 RadioFans.CN 收音机爱 好者资料库 3940 EXPLODED VIEWEXPLODED PARTS LIST Description Part No. Item No. 1016456GLASS 2148073INPUT POWER SWITCH 3017531PUSHBUTTON ASSY RED 4017517PUSHBUTTON ASSY BLK 5078033O-RING 6749695KNOB ASSY 7104017WAS