McIntosh-MR85-tun-sm 维修电路原理图.pdf

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1、SERVICE MANUALPerformance Specifications . 2Notes . 2Rear Panel. 3Section Location . 3Block Diagram . 4Interconnection Diagram . 5 - 6Power Supply Schematic and PCB . 7 - 10Display Schematic and PCB . 11 - 16Tuner Schematic and PCB . 17 - 19RAA1 Schematic and PCB. 20Parts List. 21 - 22Exploded View

2、and Parts List. 24 - 26Repacking Instructions . 27CONTENTSINCLUDING TM1 TUNER MODULE OPTIONAM/FM TUNERRadioFans.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, all voltages indicated on theschematics are measur

3、ed 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 are microfarads (uF).c. Inductor values are in m

4、icrohenries (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 manufacturer.FM Tuner SpecificationsUseable Sensitiv

5、ity14dBF which is 1.4uV across 75 ohms50dB Quieting SensitivityMono: 19dBF which is 2.4uV across 75 ohmsStereo: 35dBF which is 15uV across 75 ohmsSignal To Noise RatioMono: 75dBStereo: 70dBFrequency ResponseMono: + 0, - 1dB from 20 to 15,000HzStereo: + 0, - 1dB from 20 to 15,000HzHarmonic Distortion

6、Mono: 0.3% at 100Hz0.3% at 1,000Hz0.3% at 10,000HzStereo: 0.45% at 100Hz0.45% at 1,000Hz0.65% at 10,000HzIntermodulation DistortionMono 0.25%Stereo0.45%Capture Ratio1.2dBAlternate Channel Selectivity75dBSpurious Response100dBImage Response75dBRF Intermodulation65dBStereo Separation45dB at 100Hz45dB

7、at 1,000Hz35dB at 10,000HzSCA Rejection65dBAM Tuner SpecificationsSensitivity20uV External Antenna InputSignal To Noise Ratio48dB at 30% modulation58dB at 100% modulationHarmonic Distortion0.5% maximum at 50% modulationFrequency Response50Hz to 6kHz NRSCAdjacent Channel Selectivity45dB minimum IHFIm

8、age Rejection65dB minimum from 540 to 1600kHzIF Rejection80dB minimumGeneral SpecificationsRated OutputFixed output: 1.2 VoltsVariable output: 0 - 1.2 VoltsOutput ImpedanceLess than 100 ohmsPower Requirements100 Volts, 50/60Hz at 20 watts110 Volts, 50/60Hz at 20 watts120 Volts, 50/60Hz at 20 watts22

9、0 Volts, 50/60Hz at 20 watts230 Volts, 50/60Hz at 20 watts240 Volts, 50/60Hz at 20 wattsNote Refer to the rear panel of the MR85 for the correct voltage.Dimensions17-1/2” (44.5cm) W, 5-3/8” (13.7cm) H, 17-1/2” (44.5cm) D,(including clearance for connectors)Weight25.5 pounds (11.6 kg) net, 43 pounds

10、(19.5 kg) inshipping cartonRadioFans.CN 收音机爱好者资料库REAR PANELMR85SECTION LOCATION3TOP VIEW WITH COVER REMOVEDBLOCK DIAGRAM456MR85INTERCONNECT782POWER SUPPLY 0494109102POWER SUPPLY 049410MR8511123DISPLAY 049409 1 0F 213143MR85DISPLAY 049409 2 0F 231516DISPLAY 04940917184AMR85TUNER 0490844B19204ATUNER

11、0490844B5ARAA1 0490845BPARTS LISTPART NO DESCRIPTIONREF NOINTERCONNECT171320SWITCH CABLE ASSY117711AC INPUT LINE FILTEREM1089101FUSE, 250mA SLO-BLO 5 X 20F1159327MR85 POWER TRANSFORMERT1074091AC TERMINAL BLOCKTB1049410 POWER SUPPLY PCB003611CARD MOUNTING BRACKETBRKT1BRKT2061268MONO CAP .1UF, 50V, Z5

12、UC1 C2 C3061273220PF 5% 100V NPOC8061277MONO CAP 0.1MF 20% 50VC4 C5 C6 C7064307CAP M POLY .0039UF 5% 100/250VDCC21 C22064312CAP M POLY .01UF 5% 63VDCC19 C23 C24064314CAP M POLY .015UF 5% 63/250VDCC20064316CAP M POLY .022UF 5% 63VDCC18064338CAP M POLY 0.1MF 100VC16 C17066161CAP ELECT 100UF 25V-50VC10

13、 C11 C12066214CAP ELECT 22UF 100V RADIALC13066215CAP ELECT 47UF 50VC42066221CAP ELECT 10UF 50V SINGLE ENDC35 C36 C37066278CAP ELECT 47MF 100V 20%C32066344CAP ELECT 100UF 25VC41066360CAP ELECT 3300UF 35VC9066404CAP ELECT 1000MF 16VC15066443CAP ELECT 4700MF 35VC14066469CAP ELECT 470UF 50VC33 C34066506

14、CAP ELECT 22UF 100VC46 C48 C49C50 C51 C52066510CAP ELECT 1UF 50VC40070047SILICON DIODE 1N4148 T&RD12 D15 D16D17 D18 D19D20 D25070085DIODE ZENER 6.2V 5% 500MWD11070121DIODE ZENER 33V 5% 1/2WD3070131DIODE RECTIFIERD1 D2 D4 D5D7 D8 D9 D10D13 D14070132DIODE ZENER 5VD6080017TO-220 HEATSINKIC11087050REED

15、RELAY FORM 1A, 5V, 500 OHMSK3 K4 K5 K6087057RELAYK1 K2089088FUSE 2A SLO-BLO 5 X 20 250VIECF31172154-PIN CONNECTORJ2- J9-117217MALE CONN: 7 PINJ1- J10-117218MALE CONN 6-POS FRICTION LKJ3- J4- J5- J6-J7- J8-117450PHONE JACK 4P RCA GOLD PLATEDJ20 J21117549HEADPHONE JACK DUAL BLACK 1/8J22 J23117708FASTO

16、N BLADE W/FEETJ11 J12 J13J14 J15 J16J17 J18 J19132090TRANSISTOR NPN DAR MPSA25Q1132223TRANSISTOR NPN MPS4124 2K/REELQ2 Q3133114IC AUDIO PROCESSORU3133119IC REGULATOR +12 VOLTIC11133175IC AND 2 INPUT X 4IC2 IC3 IC6133186IC SHFT REG SER-PARIC1133192IC NAND SCHMIT 2-IN X 4IC7133306NEG 24V REGULATORIC10

17、133342IC QUAD ANALOG SWITCH HI SPEEDIC4 IC5133365IC 5V 1.5A REGULATOR LOW DROPIC12134495POTENTIOMETER DUAL 20K TAPPEDR54 R55137002RES FP 1.1 OHM 1/4W 5%R18137025FLAMEPROOF RES: 10 OHMS 5% 1/4W R13139005WIRE RES: 2 OHMS 10% 5WR52144053RES MF 10K 1% 1/4WR16 R22 R27R28 R30144090RES MF 1K 1% 1/4WR5 R24

18、R50144097RES MF 4.75K 1% 1/4WR10 R51144101RES MF 11K 1% 1/4WR11144103RES 16.5K 1% 1/4WR29 R31144112RES MF 82.5K 1%R12144113RES MF 100K 1% 1/4WR2 R3 R9 R41144154RES MF 12.1K 1% 1/4WR26144157RES MF 10 1% 1/4WR1144172RES MF 221 1% 1/4WR4 R8144181RES MF 18.2K 1% 1/4WR25144187RES MF 22.1K 1% 1/4WR15 R23

19、R49144191RES MF 1.21K 1% 1/4WR14141196RES CF 100 5% 1/4WR17 R20 R33R35144262RES NETWORK 2X220K ISOR57 R60144273RES MF 182 1/4W 1%R6 R7144323RESNET 3 X 220K OHM BUSSEDR53144364RES MF 475K 1% 1/4WR40144366RES NETWORK ISOLATED 2X22KR56 R58 R59R61144442RES MF 47.5 1% 1/4WR19 R21 R34R36049409 DISPLAY PCB

20、058109LED, SQUARE TYPE(RED)DS4 DS5058150MX132 12 CHARACTER DISPLAYDS1058153INCANDESCENT LAMP 14V 100MALAMP1 LAMP2LAMP3 LAMP4LAMP5 LAMP6LAMP7 LAMP8058155PHOTO MICROSENSORDETECT1DETECT2061262MON CER 0.001MF 100V NPOC4 C5 C6 C8C10 C11 C12C13 C23 C40061268MONO CAP: .1UF,50V,Z5UC33 C34 C35C36 C38061277MO

21、NO CAP 0.1MF 20% 50VC1 C2 C3061285MONO CAP 33PFC45 C46064320CAP M POLY .047UF 5% 63/100VDCC41064325CAP M POLY .1UF 5% 63VDCC42064333CAP M POLY .47UF 5% 50/63VDCC43066215CAP ELECT 47UF 50VC27 C28 C32066221CAP ELECT 10UF 50V SINGLE ENDC29 C30 C31070047SILICON DIODE 1N4148 T&RD6 D7070061ZENER DIODE:15V

22、,1WD4070093LED LAMP REDDS2 DS3 DS6DS7 DS8117218MALE CONN 6-POS FRICTION LKJ1- J2- J3- J4-132223TRANSISTOR NPN MPS4124 2K/REELQ2132224TRANSISTOR PNPQ1133186IC SHFT REG SER-PARIC6133192IC NAND SCHMIT 2-IN X 4IC4133249IC CMOS EPROMIC2133347VF ALPHANUMERIC CONTROLLERIC5133366IC 8 BIT A/D SERIAL OUTPUTIC

23、3133408PROGRAMMED MICRO MR85 V1.00IC14137042FLAMEPROOF RES 47 OHM 5% 1/4WR12144053RES MF 10K 1% 1/4WR6 R9 R10144090RES MF 1K 1% 1/4WR2 R42144108RES MF 47.5K 1% 1/4WR19144113RES MF 100K 1% 1/4WR25144157RES MF 10 1% 1/4WR11 R16 R24144172FF RES 221 1%R8144187RES MF 22.1K 1% 1/4WR20 R26 R28144196RES MF

24、100 1% 1/4WR7144250RES NETWORK 9 X 47K BUSR14 R21 R23144253RES NET 10K X8 RES BR5144254RES NETWORK 5X47K BUSSEDR22144259RES NETWORK 4 X 100 ISOR45144263RES NETWORK 8X330 ISOR30144280RES NETWORK 9X1K ISOR1 R3 R4144298RES MF 2.21K 1% 1/4WR2721MR85221443511.74K 1% 1/4W MF RESR17144366RES NETWORK ISOLAT

25、ED 2X22KR31150058TACT SWITCHS1 S2 S3 S4S5 S6 S7 S8S9 S1017813340-PIN IC SOCKETIC14180051CRYSTAL 11.0592MHZY1049084 TUNER/RAA1 PCB060027TRIM CAP: 2-10PFC59 C60 C62C630600293-27PF TRIMMER CAPACITORC61 C64 C65C106061002DISC CAP: 1.8PF+/-.25PF NPOC35061249DISC CAP: .47UF 50V MONOLITHICC50 C70 C71C720612

26、56M.CAP: 470PF,5%,100VC39061257360PF 5% 100VC21061273220PF 5% 100V NPOC76 C77 C78C79061275MONO CAP: 100PF,5%,100V,NPOC2 C6 C12C14 C17061277MONO CAP 0.1MF 20% 50VC1 C4 C7 C11C19 C20 C26C27 C29 C30C34 C102C104 C10506128222PF 10% 100V CAPACITORC8 C24061286MONO CAP .047UF 10% 50V RADIAC10 C13 C15C16 C18

27、 C28C33 C75061287MONO CAP .0022UF 10% 50V RADIC5 C23 C25C31 C74 C103061288MONO CAP 10PF 10% 100VC3 C9 C22C32064310M POLY CAP:.0068MF,10%,63V DCC82 C83064314M POLY CAP:.015UF,5%,63V DCC36 C40064316M POLY CAP:.022UF,5%,63V DCC80 C81064318M POLY CAP:.033UF,5%,63V DCC37 C41 C42C43064320M POLY CAP:.047UF

28、 5% 63VDCC38064329M POLY CAP 0.22UF 5%C73066269CAP ELECT 1UF 10% 50VC57 C58066445ELECT CAP 10MF, 50V AMMO PACKC45 C46 C47C48 C49 C51C52 C54 C55066446ELECT CAP 47MF, 35V AMMO PACKC53066447ELECT CAP 100MF 16V AMMO PACKC56 C67 C68C69070047SILICON DIODE 1N4148 T&RD10 D102D103 D104070122(8) DIODE TUNING

29、ALL 8 DIODES USEDON JAPANESE VERSIOND1 D2 D3 D4(D5 D6 D7 D8)070125TUNING DIODED11 D12 D1011172132-PIN MALE CONNECTORJ6117223MALE CONN: 6 PIN RT. ANGLEJ31172404 PIN RT. ANGLEJ5117319CONN, RT.ANGLE, MALE, 7 POSJ4117383DIN CONN 7-PINJ2117661GOLD F CONNECTOR RIGHT ANGLEJ1117677HEADER 5 PINJ101-122229RF

30、CHOKE: 3.3UH, 10%L1122249ANT. COILL4 L5122250MIXER COILL2 L3132178TRANSISTOR: RF FET, J-310 FETQ102132220TRANSISTOR: 1-4V,PNC OFF 250 OHQ8 Q101132223TRANSISTOR NPN MPS4124 2K/REELQ3 Q5 Q6 Q7Q10 Q11 Q12132224TRANSISTOR PNP SI MPS4126 2K/RQ2 Q9132256#3SK114Y (Q1) D MOS FETQ1133147MC78L08ACP +8V REGIC6

31、133189IC OPERATIONAL AMPLIFIERIC4 IC5133231LA1175 FM FRONT ENDIC1133270IC DIRECT PLL FREQ SYNTHESIZERIC3133381AM-FM MPX TUNER ICIC2134406TRIMPOT 22KR70134414POTENTIOMETER: 10K OHMR71 R73141025RES CF 100 5% 1/4WR4 R14 R21R60141033RES CF 220 5% 1/4WR54 R65141037RES CF 330 5% 1/4WR23 R26141041RES CF 47

32、0 5% 1/4WR103141049RES CF 1.0K 5% 1/4WR3 R5 R7 R30R38141057RES CF 2.2K 5% 1/4WR39 R46141060RES CF 3.3K 5% 1/4WR63141064RES CF 4.7K 5% 1/4WR22 R24 R33R35 R69141072RES CF 10K 5% 1/4WR1 R11 R15R19 R29 R41R44 R50 R64R68 R75 R101R102 R105141076RES CF 15K 5% 1/4WR6 R20 R40141080RES CF 22K 5% 1/4WR17 R52 R

33、55R58141088RES CF 47K 5% 1/4WR8 R9 R13R18141096RES CF 100K 5% 1/4WR56 R61 R76141116RES CF 680K 5% 1/4WR27 R28141124RES CF 2.2M 5% 1/4WR16 R42141144RES CF 22 5% 1/4WR67 R104141152RES CF 47 5% 1/4WR51 R74144097METAL FILM RES: 4.75K 1% 1/4WR32 R43 R45R53144121METAL FILM RES: 2.67K 1% 1/4WR47 R48144142M

34、ETAL FILM RES 2.87K 1% 1/4WR10 R25162102TRANSFORMER: QUAD DET PRIMT9162103TRANSFORMER: QUAD DET SECT8162113TRANSFORMER (MATCHING)T716211410.7MHZ MIXER TRANSFORMERT10162115AM OSC. COILT11 T101162117AM RF TRANSFORMERT12180036CRYSTAL 7.2MHZY1180046CERAMIC RESONATOR 450KHZY2180055FILTER 450KHZFN6180056F

35、ILTER CERAMIC 10.7MHZFN1 FN2 FN3049106 SWITCH PCB117670CONNECTOR 3-PIN RIGHT ANGLEJ1-146249SWITCH PULSE ROTARYS1PARTS LIST23NOTESMR85EXPLODED VIEW PARTS LIST241016419FRONT GLASS2171320C/A SWITCH3017531PUSHBUTTON ASSY RED4017517PUSHBUTTON ASSY5078033O-RING6049411KNOB ASSY7104073BLK FELT WASHER8018611

36、5” ENDCAP9101042TS 4-40 X 1/2 SLOT FILLISTER10094360FOAM TAPE 1/2 X1/211004810EXTRUSION BRACKET 5”12018609BOTTOM EXTRUSION13101172TCS 6-32 X 1/4 PHIL FLAT U/C14100147MS 6-32 X 3/16 PHIL FLAT U/C15018587TOP EXTRUSION16022314LED SHIELD17017806PLEXIGLAS LOWER18017805PLEXIGLAS UPPER19017738FRONT PANEL F

37、ILTER21017737VINYL LOCATOR22049409DISPLAY PCB ASSY23100275MS 6-32 X 1/2 PHIL BLK TRUSS HD24078031GROMMET25021030SPACER: 6 X 1/426110004M7 X .75 HEX CONTROL NUT27104013LK WASH: 5/16 X .435 X .002 INT STAR28049106SWITCH PCB ASSY29021063STANDOFF: 6-32 X 1-1/8 HEX30005077SUBPANEL31104007LK WASH: 6 X .28

38、8 INT STAR32100157MS 6-32 X 1/4 PHIL PAN ZINC33005072TRANSFORMER CAN34101054TS 6-32 X 1/4 PHIL PAN TAPTITE BLK35102045KEP-NUT 6-32 SPECIAL36078017GROMMET 3/4 X 9/1637074091AC TERMINAL BLOCK38104001FLAT STEEL WASH #4 X 9/32 X .02539104004LK WASH: 5 X .255 INT STAR40102022MN 4-40 3/16 X 1/1641005073CH

39、ASSIS TRAY42178160FUSE HOLDER43100284SEMS 2-56 X 1/4 PHIL PAN44004943RIGHT SIDE PANEL45004942LEFT SIDE PANEL46004940TOP COVER47101078TS 8-32 X 5/16 PHIL PAN BLK48004860BOTTOM COVER49017218PLASTIC FEET-BLACK50104080FLAT WASHER #10 CLEAR ZINC51100159MS 10-32 X 3/4 PH PAN BLK ZINC52049410POWER PCB ASSY

40、53049084TUNER ASSY/RAA154004903TUNER COVER55101097TS 6-32 X 3/16 PHIL PAN TAP56005070REAR PANEL57117711AC RECEPT WITH LINE FILTER58102001KEP NUT 4-40 CADMIUM PLATE59102020MACH NUT: 6-32 SELF-LOCK60005078REAR PANEL PLUG61100250SEMS MS 6-32 X 1/4 PHIL PAN62101114SM 4-24 X 1/2 PHIL PAN TYPE A63101109TS

41、 6-32 X 5 /16 PHIL PAN TAPTITERef.No.PartNo.Description2625EXPLODED VIEWREPACKING INSTRUCTIONAM/FM TUNERINCLUDING TM1 TUNER MODULE OPTIONSERVICE MANUALThe continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design without notice.

42、 Because of the constantupgrading of McIntosh products circuitry and components, the Company cannot insure, and does not warrant, the accuracy of the within schematic material, which is intended forinformation only.McINTOSH LABORATORY, INC., 2 CHAMBERS STREET, BINGHAMTON, NEW YORK 13903 Printed in U.S.A. Part Number 04072427