McIntosh-MC252-pwr-sm 维修电路原理图.pdf

SERVICE MANUALPerformance Specifications . 2Notes . 2Rear Panel . 3Section Location . 4Block Diagram . 5 - 6Interconnection Diagram . 7 - 8Heatsink Schematic and PCB . 9 - 14Power Supply Schematic and PCB. 15 - 16Input Schematic and PCB. 17 - 18Meter/Lighting Schematic and PCB. 19 - 21Meter Led Schematic and PCB . 21 - 22Parts List . 23 - 26Exploded View and Parts List . 27 - 32Repacking Instructions . 33CONTENTSPOWER AMPLIFIERRadioFans.CN 收音机爱 好者资料库PERFORMANCE SPECIFICATIONSPower Output Stereo250 watts into a 2, 4 or 8 ohm load is the minimum sinewave continuous average power per channel with bothchannels operatingPower Output Mono Bridged500 watts into a 4, 8 or 16 ohm load is the minimum sinewave continuous average power outputPower Output Mono Bi-Amp500 watts into a 1, 2 or 4 ohm load is the minimum sinewave continuous average power outputOutput Load ImpedanceStereo:2, 4 or 8 ohmsMono:1, 2, 4, 8, or 16 ohmsRated Power Band20Hz to 20,000HzTotal Harmonic DistortionMaximum Total Harmonic Distortion at any power levelfrom 250 milliwatts to rated power output is 0.005%Intermodulation DistortionMaximum Intermodulation Distortion if instantaneous peakoutput 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%Dynamic Headroom2.0dBFrequency Response+0, -0.25dB from 20Hz to 20,000Hz+0, -3dB from 10Hz to 100,000HzSensitivity1.6 Volts Unbalanced Input3.2 Volts Balanced InputA-Weighted Signal To Noise Ratio112dB below rated outputInput Impedance10,000 ohmsWide Band Damping FactorGreater than 40Power Requirements100 Volts, 50/60Hz at 8 amps110 Volts, 50/60Hz at 7.2 amps120 Volts, 50/60Hz at 6.6 amps220 Volts, 50/60Hz at 3.3 amps230 Volts, 50/60Hz at 3.3 amps240 Volts, 50/60Hz at 3.3 ampsNote: Refer to the rear panel of the MC252 for the correctvoltage.Overall Dimensions17-1/2 inches (44.45cm) W, 9-7/16 inches (23.97cm) H,14-3/4 inches (37.5cm) D, including clearance for connec-torsWeight94.5 pounds (207.9kg) net, 108.5 pounds (238.7kg) inshipping carton21. The heavy notes on the schematic denote the primarysignal path.2. Unless otherwise noted, all voltages indicated on theschematics are measured 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 microhenries (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.NOTESRadioFans.CN 收音机爱 好者资料库3MC252TOP AND REAR PANEL4SECTION LOCATIONSTOP VIEW WITH COVER REMOVEDBOTTOM VIEW WITH COVER REMOVED56BLOCK DIAGRAMMC25278INTERCONNECT1HEATSINK 0499862AMC2529102BDRIVER SECTION1112HEATSINK 0499862A 2BHEATSINK SECTION1314MC252HEATSINK 0499862A 2BPOWER SUPPLY 049757315161718INPUT 0497554MC2521920METER/LIGHTING 04975652122METER/LIGHTING 0497565MC252METER LED 0497586PARTS LIST2324Ref. No.DescriptionPart No.12B2A3INTERCONNECTBP1Binding Post BLK117741BP2Binding Post RED117741BP3Binding Post RED117741BP4Binding Post RED117741BP5Binding Post RED117741BP6Binding Post RED117741BP7Binding Post RED117741BP8Binding Post BLK117741D1Diode Bridge Rectifier070139F1Fuse089105J1Receptacle, AC Line117487MT1Meter124084MT2Meter124084RT1Thermistor Assembly052008RT2Thermistor Assembly052008S1Switch146243S2Switch146243T1Power Transformer049763T2Output Transformer049766T3Output Transformer049766TB1Terminal Block AC074091049986 HEATSINKC1CAP DISC MONO .47UF 50V061249C2CAP MONO .1uF 50V 20% Z5U061305C3CAP MONO .1uF 50V 20% Z5U061305C4CAP ELECT 47UF 35V066446C5CAP ELECT 10UF 100VDC066462C6CAP ELECT 10UF 100VDC066462C7CAP MONO .1uF 50V 20% Z5U061305C8CAP MONO .1uF 50V 20% Z5U061305C9CAP MONO 220PF 100V 10PO061301C10CAP MONO 100PF 100V 10% NPO061300C11CAP MONO 100PF 100V 10% NPO061300C12CAP ELECT 220UF 25V066507C13CAP MPF 0.0047UF 5VDC064308C14CAP POLYPROP 0.15UF 10VDC064363C15CAP POLYPROP .047UF 10VDC064364C16CAP ELECT 10UF 100VDC066462C17CAP ELECT 10UF 100VDC066462C18CAP MONO .01UF 50V 20% X7R061304C19CAP ELECT 47UF 35V066446C20CAP ELECT 47UF 35V066446C21CAP MONO .01UF 50V 20% X7R061304C22CAP MONO .1uF 50V 20% Z5U061305C23CAP MONO 100PF 100V 10PO061300C24CAP MONO 100PF 100V 10% NPO061300C25CAP MONO .1uF 50V 20% Z5U061305C26CAP MPF 0.47UF 5/100VDC064442C27CAP MPF 0.47UF 5/100VDC064442D1DIODE SILICON070047D2DIODE SILICON070047D3DIODE SILICON070047D4DIODE SILICON070047D5DIODE SILICON070047D6DIODE 200V 3A070126D7DIODE 200V 3A070126J1CONN MALE 9 POS FRICTION LK117244J2CONN MALE 9 POS FRICTION LK117244J3CONN HEADER 2 PIN 0.156117404J4BLADE FASTON W/FEET117708J5CONN 4 PIN117215J7BLADE FASTON W/FEET117708J8CONN 2 PIN MALE117213J9BLADE FASTON W/FEET117708LD1LDR NETWORK VTL5C9144179Q1TRANSISTOR PNP132224Q2TRANSISTOR NPN132223Q3TRANSISTOR NPN132223Q4TRANSISTOR N JFET132222Q5TRANSISTOR N JFET132222Q6TRANSISTOR N JFET132222Q7TRANSISTOR NPN POWER132255Q8TRANSISTOR SI NPN 25V132254Q9TRANSISTOR NPN POWER132255Q10TRANSISTOR PNP132224Q11TRANSISTOR NPN POWER132255Q12TRANSISTOR SI NPN 25V132254Q13TRANSISTOR NPN132223Q14TRANSISTOR SI NPN 25V132254Q15TRANSISTOR NPN132223Q16TRANSISTOR PNP132224Q17TRANSISTOR NPN 25C3334C132285Q18TRANSISTOR PNP 2SA32IC132286Q19TRANSISTOR NPN SILICON132171Q20TRANSISTOR PNP SILICON132172Q21TRANSISTOR NPN132223Q22TRANSISTOR NPN 25C3334C132285Q23TRANSISTOR PNP 2SA32IC132286Q24TRANSISTOR NPN132268Q25TRANSISTOR PNP132267Q26TRANSISTOR NPN POW 2SC5200132291Q27TRANSISTOR PNP POW 2SA1943132292Q28TRANSISTOR NPN POW 2SC5200132291Q29TRANSISTOR PNP POW 2SA1943132292Q30TRANSISTOR NPN POW 2SC5200132291Q31TRANSISTOR PNP POW 2SA1943132292Q32TRANSISTOR NPN POW 2SC5200132291Q33TRANSISTOR PNP POW 2SA1943132292Q34TRANSISTOR NPN POW 2SC5200132291Q35TRANSISTOR PNP POW 2SA1943132292R1RES MF 10 OHM 1% 1/4W144157R2RES MF 10 OHM 1/4W144157R3RES MF 4.75K 1% 1/4W144097R4RES MF 100 OHM 1% 1/4W144196R5RES MF 475 OHM 1% 1/4W144086R6RES MF 22.1K 1% 1/4W144187R7RES MF 10M 1% 1/4W144264R8RES MF 267K 1% 1/4W144118R9RES MF 2.21K 1% 1/4W144298R10RES MF 221 OHM 1% 1/4W144172R11RES MF 267K 1% 1/4W144118R12RES MF 47.5K 1% 1/4W144108R13RES MF 47.5K 1/4W144108R14RES MF 3.32K 1% 1/4W144095R15RES MF 221 OHM 1% 1/4W144172R16RES MF 1K 1% 1/4W144090R17RES MF 221 OHM 1% 1/4W144172R18RES MF 3.32K 1/4W144095R19RES MF 221 OHM 1% 1/4W144172R20RES MF 1K 1% 1/4W144090R21RES MF 221 OHM 1% 1/4W144172R22RES MF 499 OHM 1% 1/4W144087R23RES MF 267K 1% 1/4W144118R24RES MF 187K 1% 1/4W144406R25RES MF 324 OHM 1% 1/4W144338R26RES MF 324 OHM 1% 1/4W144338R27RES MF 6.49K .5% 1/4W144401R28RES MF 13.7K 1% 1/4W144342R29RES MF 221 OHM 1/4W144172R30RES WW 2 OHM 10% 5W139005R31RES WW 4 OHM 5W139119R32RES FP 22 OHM 1/4W 5137033R33RES FP 22 OHM 1/4W 5137033R34RES MF 324 OHM 1/4W144338R35RES MF 324 OHM 1/4W144338R36RES MF 2.21K 1/4W144298R37RES MF 22.1K 1/4W144187R39RES MF 22.1K 1/4W144187R40RES MET OX 680 OHM 5% .5W137093R41RES MET OX 680 OHM 5% .5W137093R42RES MF 1.82K 1% 1/4W144296R43RES MET OX 430 OHM 5% .5W137095R44POT TRIM 200 OHM 20% HORIZ AD134390R45RES MF 1.82K 1% 1/4W144296R46RES MET OX 47 OHM 5% .5W137096R47RES WW DUAL .47 OHM 5% 5W139199R48RES WW DUAL .47 OHM 5% 5W139199R49RES WW DUAL .47 OHM 5% 5W139199R50RES WW DUAL .47 OHM 5% 5W139199R51RES WW DUAL .47 OHM 5W139199R52RES MF 1K 1% 1/4W144090R53RES MF 1K 1% 1/4W144090R54RES WW DUAL .47 OHM 5W139199R55RES WW DUAL .47 OHM 5% 5W139199R56RES WW DUAL .47 OHM 5% 5W139199RT1SENSOR THERMAL144249U1IC OPAMP NE4558N133028049757 POWER SUPPLYC1CAP POLY .047UF 10% 250VDC064364C2CAP ELECT 10UF 50V066445C327000uF 100V ELECTROLYTIC066489C427000uF 100V ELECTROLYTIC066489C5CAP ELECT 22UF 100V066506C6CAP ELECT 3300UF 35V066509C7CAP ELECT 3300UF 35V066509C8CAP ELECT 4.7UF 50V066512C9CAP ELECT 10UF 100VDC066462D1DIODE RECTIFIER070131D2DIODE RECTIFIER070131D3DIODE RECTIFIER070131D4DIODE RECTIFIER070131D5DIODE RECTIFIER070131D6DIODE RECTIFIER070131D7DIODE SILICON070047HS1HEATSINK T0220080014HS2HEATSINK T0220080014J1BLADE FASTON W/FEET117708J2BLADE FASTON W/FEET117708J3BLADE FASTON W/FEET117708J4BLADE FASTON W/FEET117708J5BLADE FASTON W/FEET117708J6BLADE FASTON W/FEET117708J7CONN MALE 7 PIN117217J8CONN 4 PIN117215J9BLADE FASTON W/FEET117708J11CONN HEADER 2 PIN 0.156117404J12CONN HEADER 2 PIN 0.156117404J13BLADE FASTON W/FEET117708J14CONN MALE 9 POS FRICTION LK117244J15CONN MALE 9 POS FRICTION LK117244J16CONN MALE 9 POS FRICTION LK117244J17BLADE FASTON W/FEET117708J18BLADE FASTON W/FEET117708K1RELAY 48V 18.8mA87052Q1TRIAC DRIV OPTOCPLR 600V131022Q2TRANSISTOR NPN132223Q3TRANSISTOR PNP1322242526PARTS LIST cont546MC252Q4TRANSISTOR NPN132223Q5TRANSISTOR PNP132224Q6TRANSISTOR P CHAN JUNC FET132226Q7TRANSISTOR PNP132224R1RES MF 33.2K 1% 1/4W144015R2RES MF 33.2K 1% 1/4W144015R3RES MF 2.74M 1/4W144271R4RES WW 1.5K 10% 5W139079R5RES MF 1.1K 1% 1/4W144091R6RES MF 22.1K 1% 1/4W144187R7RES MF 1M 1/4W144269R8RES MF 12.1K 1% 1/4W144154R9RES MF 2.1K 1% 1/4W144299R10RES MF 12.1K 1% 1/4W144154R11RES MF 3.32K 1% 1/4W144095R12RES MF 20K 1% 1/4W144104R13RES MF 2.1K 1% 1/4W144299R14RES MF 150K 1% 1/4W144419R15RES WW 2.7 OHM 10W139173R16RES WW 2.7 OHM 10W139173SP1BRACKET PCB CARD MOUNTING003611SP2BRACKET PCB CARD MOUNTING003611SP3BRACKET PCB CARD MOUNTING003611SP4BRACKET PCB CARD MOUNTING003611U1IC REGULATOR 15V133154U2IC REGULATOR -15V133153049755 INPUTC1CAP ELECT 10UF 50V066445C2CAP ELECT 10UF 50V066445C3CAP ELECT 10UF 50V066445C4CAP ELECT 10UF 50V066445C5CAP MONO 47PF 200V 10% NPO061299C6CAP MONO 22PF 200V 10% NPO061298C7CAP MONO 47PF 200V 10% NPO061299C8CAP MONO 22PF 200V 10% NPO061298C9CAP MONO 22PF 200V 10% NPO061298C10CAP MONO 22PF 200V 10% NPO061298C11CAP MONO .1uF 50V 20% Z5U061305C12CAP ELECT 10UF 50V066445C13CAP MPF 0.22UF 5% 63VDC064329C14CAP MONO .1uF 50V 20% Z5U061305C15CAP MONO .1uF 50V 20% Z5U061305J1XLR FEM HORIZ PCB WITH LATCH117814J2XLR FEM HORIZ PCB WITH LATCH117814J3JACK PHONO GOLD PJ261G117436J4JACK HEADPHONE DUAL BLK 1/8117825J5CONN MALE 9 POS FRICTION LK117244J6CONN MALE 9 POS FRICTION LK117244R1RES MF 20K 1% 1/4W144104R2RES MF 20K 1% 1/4W144104R3RES MF 20K 1% 1/4W144104R4RES MF 20K 1% 1/4W144104R5RES MF 20K 1% 1/4W144104R6RES MF 20K 1% 1/4W144104R7RES MF 20K 1% 1/4W144104R8RES MF 20K 1% 1/4W144104R9RES MF 40.2K 1% 1/4W144107R10RES MF 40.2K 1% 1/4W144107R11RES MF 20K 1% 1/4W144104R12RES MF 40.2K 1% 1/4W144107R13RES MF 1K 1% 1/4W144090R14RES MF 20K 1% 1/4W144104R15RES MF 1K 1% 1/4W144090R16RES MF 40.2K 1% 1/4W144107R17RES MF 20K 1% 1/4W144104R18RES MF 20K 1% 1/4W144104R19RES MF 3.32K 1% 1/4W144095R20RES MF 3.32K 1% 1/4W144095R21RES MF 20K 1% 1/4W144104R22RES MF 100 OHM 1% 1/4W144196R23RES MF 68.1 OHM 1% 1/4W144082R24RES MF 1M 1/4W144269R25RES MF 20K 1% 1/4W144104R26RES MF 10 OHM 1% 1/4W144157R27RES MF 10 OHM 1% 1/4W144157S1JSA4320-0201148069SP1BRACKET PCB CARD MOUNTING003611U1IC OPAMP NE4558N133028U2IC NAND SCHMIT 2-IN X 4133192U3IC REGULATOR +5 VOLT133093049756 METER/LIGHTINGC4CAP MONO .1uF 50V 20% Z5U061305C5CAP MONO .1uF 50V 20% Z5U061305C8CAP MPF 0.22UF 5% 63VDC064329C9CAP MPF 0.1UF 100V064337C10CAP ELECT 10UF 50V066445C11CAP MONO .1uF 50V 20% Z5U061305C12CAP MONO .1uF 50V 20% Z5U061305C13CAP MPF 0.22UF 5% 63VDC064329C14CAP MPF 0.1UF 100V064337C15CAP ELECT 10UF 50V066445D1DIODE ZENER 8.2V 1/2W070130D9LED AMBER058133D13LED AMBER058133D14DIODE SILICON070047D15DIODE SILICON070047D16DIODE SILICON070047D17DIODE SILICON070047D18DIODE SILICON070047D19DIODE SILICON070047D20DIODE SILICON070047D21DIODE SILICON070047D22DIODE SILICON070047D23DIODE SILICON070047D24DIODE SILICON070047D25DIODE SILICON070047DS5LED GREEN 5MM HI-INTENSITY058165DS6LED GREEN 5MM HI-INTENSITY058165DS7LED GREEN 5MM HI-INTENSITY058165DS8LED SQUARE RED058109J1CONN MALE 9 POS FRICTION LK117244J2CONN 4 PIN117215J3CONN 3 POS MLE MTS100 NORM117214J4HEADER 2 PIN LATCHING117766J5CONN 4 PIN117215J6HEADER 2 PIN LATCHING117766Q1TRANSISTOR NPN132223Q2TRANSISTOR NPN132223Q3TRANSISTOR NPN132223Q4TRANSISTOR NPN132223Q8TRANSISTOR NPN132223Q9TRANSISTOR NPN132223Q10TRANSISTOR NPN132223Q11TRANSISTOR NPN132223Q12TRANSISTOR NPN132223Q13TRANSISTOR NPN132223Q14TRANSISTOR NPN132223Q15TRANSISTOR NPN132223R6RES MF 187K 1% 1/4W144406R8RES MF 12.1K 1% 1/4W144154R9RES MF 475K 1% 1/4W144364R11RES MF 4.75K 1% 1/4W144097R13RES MF 681 OHM 1% 1/4W144195R18RES MF 12.1K 1% 1/4W144154R19RES MF 4.75K 1% 1/4W144097R28RES MF 562 OHM 1/4W144408R29RES MF 806 OHM 1/4W144089R37RES MF 187K 1% 1/4W144406R38RES MF 681 OHM 1% 1/4W144195R39RES MF 475K 1% 1/4W144364R40RES MF 200K 1/4W144117R41RES MF 10.2K 1% 1/4W144130R42RES MF 10M 1% 1/4W144264R43RES MF 2.21M 1/4W144265R44RES MF 100 OHM 1% 1/4W144196R45RES MF 187K 1% 1/4W144406R46RES MF 1.21K 1% 1/4W144191R47RES 82.5K 1/4W144112R48POT TRIM 100K OHM 20%134383R49RES MF 221K 1% 1/4W144421R50RES MF 6.81K 1/4W144297R51RES MF 100 OHM 1% 1/4W144196R53RES MF 200K 1/4W144117R54RES MF 10.2K 1% 1/4W144130R55RES MF 10M 1% 1/4W144264R56RES 82.5K 1/4W144112R57RES MF 2.21M 1/4W144265R58RES MF 187K 1% 1/4W144406R59RES MF 6.81K 1/4W144297R60POT TRIM 100K OHM 20%134383R61RES MF 1.21K 1% 1/4W144191U1IC DUAL OPERATIONAL AMP133260U2IC DUAL OPERATIONAL AMP133260049758 METER LEDDS1LED BLUE 5MM HI-INTENSITY058166DS2LED BLUE 5MM HI-INTENSITY058166DS3LED GREEN 5MM HI-INTENSITY058165DS4LED GREEN 5MM HI-INTENSITY058165DS5LED BLUE 5MM HI-INTENSITY058166DS6LED BLUE 5MM HI-INTENSITY058166DS7LED GREEN 5MM HI-INTENSITY058165DS8LED GREEN 5MM HI-INTENSITY058165J1CONN 4 PIN RIGHT ANGLE117240R1RES MF 221 OHM 1% 1/4W144172R2POT TRIM 500 OHM 20% HOR ADJ134410R3RES MF 221 OHM 1% 1/4W144172R4POT TRIM 500 OHM 20% HOR ADJ134410R5RES MF 221 OHM 1% 1/4W144172R6POT TRIM 500 OHM 20% HOR ADJ134410R7RES MF 221 OHM 1% 1/4W144172R8POT TRIM 500 OHM 20% HOR ADJ1344102827EXPLODED VIEW3029EXPLODED VIEW contMC2523231EXPLODED VIEW PARTS LISTPartNo.DescriptionRefNo.1016469GLASS CENTER PANEL2016487GLASS PANEL W/HOLE3018717END CAP4018711CENTER EXTRUSION5018710TOP/BOTTOM END CAP6049321ASSY KNOB7104164WASHER BLK FELT 1 X 1 /4 X 1/168094016TAPE FOAM 1/4 X 1/89100342SCREW 6-32 X 3/8 FILLISTER HD10092426FILTER COLOR METER11005351GLASS PANEL, PLATE12005312PLATE GAP13101074SCREW TAPPING 4-40 X 1/4 PH PN14100276SCREW MACH SEMS 6-32 X 5/16 PH PN15005237TITLE MOUNT16017913LOGO BACKLIGHT17094430TAPE FOAM WHITE 1/2W X 1/8 THK18101054SCREW TAPTITE 6-32 X 1/4 PH PN19017901LOGO PUSHBUTTON BACKLIGHT20005239SUBPANEL21146243SWITCH POWER22021159BUSHING SWITCH23021030SPACER 6 X 1/424049756ASSY METER/LIGHTING PCB25102001NUT KEP 4-40 CADMIUM PLATE26124084METER27017881BACKLIGHT METER28005229METER PLATE29102045NUT KEP 6-32 SPECIAL30049758ASSY METER LED PCB31104014WASHER INT STAR 3/8 X .507 X .00232005236DUST COVER33100200SCREW MACH 10-32 X 1/2 PH TRS HD34126948DECAL TOP COVER35005234CHASSIS36078025GROMMET RUBBER 3/4ID37117741POST BINDING BLK38117740POST BINDING RED39178161HOLDER FUSE 5 X 20mm IEC40117487RECEPTACLE AC LINE41100250SCREW