McIntosh-MR-85-Service-Manual(1) 电路图 维修手册.pdf

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

2、ploded View and Parts List. 24 - 26 Repacking Instructions . 27 CONTENTS INCLUDING TM1 TUNER MODULE OPTION AM/FM TUNER 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. Unless otherwise noted, all voltages indicated on t

3、he 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 are in ohms. b. Capacitor values are microfarads (u

4、F). 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 replacement parts recom- mended by the manufacturer.

5、 FM Tuner Specifications Useable Sensitivity 14dBF which is 1.4uV across 75 ohms 50dB Quieting Sensitivity Mono: 19dBF which is 2.4uV across 75 ohms Stereo: 35dBF which is 15uV across 75 ohms Signal To Noise Ratio Mono: 75dB Stereo: 70dB Frequency Response Mono: + 0, - 1dB from 20 to 15,000Hz Stereo

6、: + 0, - 1dB from 20 to 15,000Hz Harmonic Distortion Mono: 0.3% at 100Hz 0.3% at 1,000Hz 0.3% at 10,000Hz Stereo: 0.45% at 100Hz 0.45% at 1,000Hz 0.65% at 10,000Hz Intermodulation Distortion Mono 0.25% Stereo0.45% Capture Ratio 1.2dB Alternate Channel Selectivity 75dB Spurious Response 100dB Image R

7、esponse 75dB RF Intermodulation 65dB Stereo Separation 45dB at 100Hz 45dB at 1,000Hz 35dB at 10,000Hz SCA Rejection 65dB AM Tuner Specifications Sensitivity 20uV External Antenna Input Signal To Noise Ratio 48dB at 30% modulation 58dB at 100% modulation Harmonic Distortion 0.5% maximum at 50% modula

8、tion Frequency Response 50Hz to 6kHz NRSC Adjacent Channel Selectivity 45dB minimum IHF Image Rejection 65dB minimum from 540 to 1600kHz IF Rejection 80dB minimum General Specifications Rated Output Fixed output: 1.2 Volts Variable output: 0 - 1.2 Volts Output Impedance Less than 100 ohms Power Requ

9、irements 100 Volts, 50/60Hz at 20 watts 110 Volts, 50/60Hz at 20 watts 120 Volts, 50/60Hz at 20 watts 220 Volts, 50/60Hz at 20 watts 230 Volts, 50/60Hz at 20 watts 240 Volts, 50/60Hz at 20 watts Note Refer to the rear panel of the MR85 for the correct voltage. Dimensions 17-1/2” (44.5cm) W, 5-3/8” (

10、13.7cm) H, 17-1/2” (44.5cm) D, (including clearance for connectors) Weight 25.5 pounds (11.6 kg) net, 43 pounds (19.5 kg) in shipping carton RadioFans.CN 收音机爱 好者资料库 REAR PANEL MR85 SECTION LOCATION 3 TOP VIEW WITH COVER REMOVED RadioFans.CN 收音机爱 好者资料库 BLOCK DIAGRAM 4 56 MR85 INTERCONNECT 78 2POWER S

11、UPPLY 049410 910 2POWER SUPPLY 049410 MR85 1112 3DISPLAY 049409 1 0F 2 1314 3 MR85 DISPLAY 049409 2 0F 2 3 1516 DISPLAY 049409 1718 4A MR85 TUNER 0490844B 1920 4ATUNER 0490844B5ARAA1 0490845B PARTS LIST PART NO DESCRIPTIONREF NO INTERCONNECT 171320SWITCH CABLE ASSY 117711AC INPUT LINE FILTEREM1 0891

12、01FUSE, 250mA SLO-BLO 5 X 20F1 159327MR85 POWER TRANSFORMERT1 074091AC TERMINAL BLOCKTB1 049410 POWER SUPPLY PCB 003611CARD MOUNTING BRACKETBRKT1 BRKT2 061268MONO CAP .1UF, 50V, Z5UC1 C2 C3 061273220PF 5% 100V NPOC8 061277MONO CAP 0.1MF 20% 50VC4 C5 C6 C7 064307CAP M POLY .0039UF 5% 100/250VDCC21 C2

13、2 064312CAP M POLY .01UF 5% 63VDCC19 C23 C24 064314CAP M POLY .015UF 5% 63/250VDCC20 064316CAP M POLY .022UF 5% 63VDCC18 064338CAP M POLY 0.1MF 100VC16 C17 066161CAP ELECT 100UF 25V-50VC10 C11 C12 066214CAP ELECT 22UF 100V RADIALC13 066215CAP ELECT 47UF 50VC42 066221CAP ELECT 10UF 50V SINGLE ENDC35

14、C36 C37 066278CAP ELECT 47MF 100V 20%C32 066344CAP ELECT 100UF 25VC41 066360CAP ELECT 3300UF 35VC9 066404CAP ELECT 1000MF 16VC15 066443CAP ELECT 4700MF 35VC14 066469CAP ELECT 470UF 50VC33 C34 066506CAP ELECT 22UF 100VC46 C48 C49 C50 C51 C52 066510CAP ELECT 1UF 50VC40 070047SILICON DIODE 1N4148 T&RD1

15、2 D15 D16 D17 D18 D19 D20 D25 070085DIODE ZENER 6.2V 5% 500MWD11 070121DIODE ZENER 33V 5% 1/2WD3 070131DIODE RECTIFIERD1 D2 D4 D5 D7 D8 D9 D10 D13 D14 070132DIODE ZENER 5VD6 080017TO-220 HEATSINKIC11 087050REED RELAY FORM 1A, 5V, 500 OHMSK3 K4 K5 K6 087057RELAYK1 K2 089088FUSE 2A SLO-BLO 5 X 20 250V

16、IECF3 1172154-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 J21 117549HEADPHONE JACK DUAL BLACK 1/8J22 J23 117708FASTON BLADE W/FEETJ11 J12 J13 J14 J15 J16 J17 J18 J19 132090TRANSISTOR NPN DAR MPSA2

17、5Q1 132223TRANSISTOR NPN MPS4124 2K/REELQ2 Q3 133114IC AUDIO PROCESSORU3 133119IC REGULATOR +12 VOLTIC11 133175IC AND 2 INPUT X 4IC2 IC3 IC6 133186IC SHFT REG SER-PARIC1 133192IC NAND SCHMIT 2-IN X 4IC7 133306NEG 24V REGULATORIC10 133342IC QUAD ANALOG SWITCH HI SPEEDIC4 IC5 133365IC 5V 1.5A REGULATO

18、R LOW DROPIC12 134495POTENTIOMETER DUAL 20K TAPPEDR54 R55 137002RES FP 1.1 OHM 1/4W 5%R18 137025FLAMEPROOF RES: 10 OHMS 5% 1/4W R13 139005WIRE RES: 2 OHMS 10% 5WR52 144053RES MF 10K 1% 1/4WR16 R22 R27 R28 R30 144090RES MF 1K 1% 1/4WR5 R24 R50 144097RES MF 4.75K 1% 1/4WR10 R51 144101RES MF 11K 1% 1/4

19、WR11 144103RES 16.5K 1% 1/4WR29 R31 144112RES MF 82.5K 1%R12 144113RES MF 100K 1% 1/4WR2 R3 R9 R41 144154RES MF 12.1K 1% 1/4WR26 144157RES MF 10 1% 1/4WR1 144172RES MF 221 1% 1/4WR4 R8 144181RES MF 18.2K 1% 1/4WR25 144187RES MF 22.1K 1% 1/4WR15 R23 R49 144191RES MF 1.21K 1% 1/4WR14 141196RES CF 100

20、5% 1/4WR17 R20 R33 R35 144262RES NETWORK 2X220K ISOR57 R60 144273RES MF 182 1/4W 1%R6 R7 144323RESNET 3 X 220K OHM BUSSEDR53 144364RES MF 475K 1% 1/4WR40 144366RES NETWORK ISOLATED 2X22KR56 R58 R59 R61 144442RES MF 47.5 1% 1/4WR19 R21 R34 R36 049409 DISPLAY PCB 058109LED, SQUARE TYPE(RED)DS4 DS5 058

21、150MX132 12 CHARACTER DISPLAYDS1 058153INCANDESCENT LAMP 14V 100MALAMP1 LAMP2 LAMP3 LAMP4 LAMP5 LAMP6 LAMP7 LAMP8 058155PHOTO MICROSENSORDETECT1 DETECT2 061262MON CER 0.001MF 100V NPOC4 C5 C6 C8 C10 C11 C12 C13 C23 C40 061268MONO CAP: .1UF,50V,Z5UC33 C34 C35 C36 C38 061277MONO CAP 0.1MF 20% 50VC1 C2

22、 C3 061285MONO CAP 33PFC45 C46 064320CAP M POLY .047UF 5% 63/100VDCC41 064325CAP M POLY .1UF 5% 63VDCC42 064333CAP M POLY .47UF 5% 50/63VDCC43 066215CAP ELECT 47UF 50VC27 C28 C32 066221CAP ELECT 10UF 50V SINGLE ENDC29 C30 C31 070047SILICON DIODE 1N4148 T&RD6 D7 070061ZENER DIODE:15V,1WD4 070093LED L

23、AMP REDDS2 DS3 DS6 DS7 DS8 117218MALE CONN 6-POS FRICTION LKJ1- J2- J3- J4- 132223TRANSISTOR NPN MPS4124 2K/REELQ2 132224TRANSISTOR PNPQ1 133186IC SHFT REG SER-PARIC6 133192IC NAND SCHMIT 2-IN X 4IC4 133249IC CMOS EPROMIC2 133347VF ALPHANUMERIC CONTROLLERIC5 133366IC 8 BIT A/D SERIAL OUTPUTIC3 13340

24、8PROGRAMMED MICRO MR85 V1.00IC14 137042FLAMEPROOF RES 47 OHM 5% 1/4WR12 144053RES MF 10K 1% 1/4WR6 R9 R10 144090RES MF 1K 1% 1/4WR2 R42 144108RES MF 47.5K 1% 1/4WR19 144113RES MF 100K 1% 1/4WR25 144157RES MF 10 1% 1/4WR11 R16 R24 144172FF RES 221 1%R8 144187RES MF 22.1K 1% 1/4WR20 R26 R28 144196RES

25、MF 100 1% 1/4WR7 144250RES NETWORK 9 X 47K BUSR14 R21 R23 144253RES NET 10K X8 RES BR5 144254RES NETWORK 5X47K BUSSEDR22 144259RES NETWORK 4 X 100 ISOR45 144263RES NETWORK 8X330 ISOR30 144280RES NETWORK 9X1K ISOR1 R3 R4 144298RES MF 2.21K 1% 1/4WR27 21 MR85 22 1443511.74K 1% 1/4W MF RESR17 144366RES

26、 NETWORK ISOLATED 2X22KR31 150058TACT SWITCHS1 S2 S3 S4 S5 S6 S7 S8 S9 S10 17813340-PIN IC SOCKETIC14 180051CRYSTAL 11.0592MHZY1 049084 TUNER/RAA1 PCB 060027TRIM CAP: 2-10PFC59 C60 C62 C63 0600293-27PF TRIMMER CAPACITORC61 C64 C65 C106 061002DISC CAP: 1.8PF+/-.25PF NPOC35 061249DISC CAP: .47UF 50V M

27、ONOLITHICC50 C70 C71 C72 061256M.CAP: 470PF,5%,100VC39 061257360PF 5% 100VC21 061273220PF 5% 100V NPOC76 C77 C78 C79 061275MONO CAP: 100PF,5%,100V,NPOC2 C6 C12 C14 C17 061277MONO CAP 0.1MF 20% 50VC1 C4 C7 C11 C19 C20 C26 C27 C29 C30 C34 C102 C104 C105 06128222PF 10% 100V CAPACITORC8 C24 061286MONO C

28、AP .047UF 10% 50V RADIAC10 C13 C15 C16 C18 C28 C33 C75 061287MONO CAP .0022UF 10% 50V RADIC5 C23 C25 C31 C74 C103 061288MONO CAP 10PF 10% 100VC3 C9 C22 C32 064310M POLY CAP:.0068MF,10%,63V DCC82 C83 064314M POLY CAP:.015UF,5%,63V DCC36 C40 064316M POLY CAP:.022UF,5%,63V DCC80 C81 064318M POLY CAP:.0

29、33UF,5%,63V DCC37 C41 C42 C43 064320M POLY CAP:.047UF 5% 63VDCC38 064329M POLY CAP 0.22UF 5%C73 066269CAP ELECT 1UF 10% 50VC57 C58 066445ELECT CAP 10MF, 50V AMMO PACKC45 C46 C47 C48 C49 C51 C52 C54 C55 066446ELECT CAP 47MF, 35V AMMO PACKC53 066447ELECT CAP 100MF 16V AMMO PACKC56 C67 C68 C69 070047SI

30、LICON DIODE 1N4148 T&RD10 D102 D103 D104 070122(8) DIODE TUNING ALL 8 DIODES USED ON JAPANESE VERSIOND1 D2 D3 D4 (D5 D6 D7 D8) 070125TUNING DIODED11 D12 D101 1172132-PIN MALE CONNECTORJ6 117223MALE CONN: 6 PIN RT. ANGLEJ3 1172404 PIN RT. ANGLEJ5 117319CONN, RT.ANGLE, MALE, 7 POSJ4 117383DIN CONN 7-P

31、INJ2 117661GOLD F CONNECTOR RIGHT ANGLEJ1 117677HEADER 5 PINJ101- 122229RF CHOKE: 3.3UH, 10%L1 122249ANT. COILL4 L5 122250MIXER COILL2 L3 132178TRANSISTOR: RF FET, J-310 FETQ102 132220TRANSISTOR: 1-4V,PNC OFF 250 OHQ8 Q101 132223TRANSISTOR NPN MPS4124 2K/REELQ3 Q5 Q6 Q7 Q10 Q11 Q12 132224TRANSISTOR

32、PNP SI MPS4126 2K/RQ2 Q9 132256#3SK114Y (Q1) D MOS FETQ1 133147MC78L08ACP +8V REGIC6 133189IC OPERATIONAL AMPLIFIERIC4 IC5 133231LA1175 FM FRONT ENDIC1 133270IC DIRECT PLL FREQ SYNTHESIZERIC3 133381AM-FM MPX TUNER ICIC2 134406TRIMPOT 22KR70 134414POTENTIOMETER: 10K OHMR71 R73 141025RES CF 100 5% 1/4

33、WR4 R14 R21 R60 141033RES CF 220 5% 1/4WR54 R65 141037RES CF 330 5% 1/4WR23 R26 141041RES CF 470 5% 1/4WR103 141049RES CF 1.0K 5% 1/4WR3 R5 R7 R30 R38 141057RES CF 2.2K 5% 1/4WR39 R46 141060RES CF 3.3K 5% 1/4WR63 141064RES CF 4.7K 5% 1/4WR22 R24 R33 R35 R69 141072RES CF 10K 5% 1/4WR1 R11 R15 R19 R29

34、 R41 R44 R50 R64 R68 R75 R101 R102 R105 141076RES CF 15K 5% 1/4WR6 R20 R40 141080RES CF 22K 5% 1/4WR17 R52 R55 R58 141088RES CF 47K 5% 1/4WR8 R9 R13 R18 141096RES CF 100K 5% 1/4WR56 R61 R76 141116RES CF 680K 5% 1/4WR27 R28 141124RES CF 2.2M 5% 1/4WR16 R42 141144RES CF 22 5% 1/4WR67 R104 141152RES CF

35、 47 5% 1/4WR51 R74 144097METAL FILM RES: 4.75K 1% 1/4WR32 R43 R45 R53 144121METAL FILM RES: 2.67K 1% 1/4WR47 R48 144142METAL FILM RES 2.87K 1% 1/4WR10 R25 162102TRANSFORMER: QUAD DET PRIMT9 162103TRANSFORMER: QUAD DET SECT8 162113TRANSFORMER (MATCHING)T7 16211410.7MHZ MIXER TRANSFORMERT10 162115AM O

36、SC. COILT11 T101 162117AM RF TRANSFORMERT12 180036CRYSTAL 7.2MHZY1 180046CERAMIC RESONATOR 450KHZY2 180055FILTER 450KHZFN6 180056FILTER CERAMIC 10.7MHZFN1 FN2 FN3 049106 SWITCH PCB 117670CONNECTOR 3-PIN RIGHT ANGLEJ1- 146249SWITCH PULSE ROTARYS1 PARTS LIST 23 NOTES MR85 EXPLODED VIEW PARTS LIST 24 1

37、016419FRONT GLASS 2171320C/A SWITCH 3017531PUSHBUTTON ASSY RED 4017517PUSHBUTTON ASSY 5078033O-RING 6049411KNOB ASSY 7104073BLK FELT WASHER 80186115” ENDCAP 9101042TS 4-40 X 1/2 SLOT FILLISTER 10094360FOAM TAPE 1/2 X1/2 11004810EXTRUSION BRACKET 5” 12018609BOTTOM EXTRUSION 13101172TCS 6-32 X 1/4 PHI

38、L FLAT U/C 14100147MS 6-32 X 3/16 PHIL FLAT U/C 15018587TOP EXTRUSION 16022314LED SHIELD 17017806PLEXIGLAS LOWER 18017805PLEXIGLAS UPPER 19017738FRONT PANEL FILTER 21017737VINYL LOCATOR 22049409DISPLAY PCB ASSY 23100275MS 6-32 X 1/2 PHIL BLK TRUSS HD 24078031GROMMET 25021030SPACER: 6 X 1/4 26110004M

39、7 X .75 HEX CONTROL NUT 27104013LK WASH: 5/16 X .435 X .002 INT STAR 28049106SWITCH PCB ASSY 29021063STANDOFF: 6-32 X 1-1/8 HEX 30005077SUBPANEL 31104007LK WASH: 6 X .288 INT STAR 32100157MS 6-32 X 1/4 PHIL PAN ZINC 33005072TRANSFORMER CAN 34101054TS 6-32 X 1/4 PHIL PAN TAPTITE BLK 35102045KEP-NUT 6

40、-32 SPECIAL 36078017GROMMET 3/4 X 9/16 37074091AC TERMINAL BLOCK 38104001FLAT STEEL WASH #4 X 9/32 X .025 39104004LK WASH: 5 X .255 INT STAR 40102022MN 4-40 3/16 X 1/16 41005073CHASSIS TRAY 42178160FUSE HOLDER 43100284SEMS 2-56 X 1/4 PHIL PAN 44004943RIGHT SIDE PANEL 45004942LEFT SIDE PANEL 46004940

41、TOP COVER 47101078TS 8-32 X 5/16 PHIL PAN BLK 48004860BOTTOM COVER 49017218PLASTIC FEET-BLACK 50104080FLAT WASHER #10 CLEAR ZINC 51100159MS 10-32 X 3/4 PH PAN BLK ZINC 52049410POWER PCB ASSY 53049084TUNER ASSY/RAA1 54004903TUNER COVER 55101097TS 6-32 X 3/16 PHIL PAN TAP 56005070REAR PANEL 57117711AC

42、 RECEPT WITH LINE FILTER 58102001KEP NUT 4-40 CADMIUM PLATE 59102020MACH NUT: 6-32 SELF-LOCK 60005078REAR PANEL PLUG 61100250SEMS MS 6-32 X 1/4 PHIL PAN 62101114SM 4-24 X 1/2 PHIL PAN TYPE A 63101109TS 6-32 X 5 /16 PHIL PAN TAPTITE Ref. No. Part No. Description 2625 EXPLODED VIEW REPACKING INSTRUCTI

43、ON AM/FM TUNER INCLUDING TM1 TUNER MODULE OPTION SERVICE MANUAL The 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 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 040724 27