McIntosh-MC12KW-pwr-sm 维修电路原理图.pdf
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1、MC1.2KWPerformance Specifications .2Notes .2Rear Panel .3Section Location .4Block Diagram .5 - 6Interconnection Diagram .7 - 8Heatsink Schematic and PCB .9 - 10Heatsink Slave Schematic and PCB .11 - 12Driver Schematic and PCB.13 - 15Input Schematic and PCB .16Capacitor Schematic and PCB .17 - 18Mete
2、r Schematic and PCB .19 - 22Lamp Schematic and PCB .23 - 24Light Schematic and PCB .25Power Guard Schematic and PCB .26Parts List .29 - 32Repacking Instruction .33CONTENTSSERIAL NO. YF1001 And AboveMC1.2KWPOWER AMPLIFIERSERVICE MANUALDownloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料
3、库PERFORMANCE SPECIFICATIONS21. 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 rated voltage marked on rear panel. b. All voltages are +/-10% with respect t
4、o ground. A high impedance (10 megaohm) voltmeter must be used.3. Unlessotherwisespecified: 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. Diode
5、s - Cathode c. Others - Pin 15. WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer.NOTESPower OutputMinimum sine wave continuous average power output is:1,200 watts into 2 ohm load1,200 watts into 4 ohm load1,200 watts int
6、o 8 ohm loadOutput Load Impedance2, 4 or 8 ohms Rated Power Band20Hz to 20,000HzTotal Harmonic Distortion0.005% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000HzDynamic Headroom2dBFrequency Response+0, -0.25dB from 20Hz to 20,000Hz+0, -3dB from 10Hz
7、to 100,000HzInput Sensitivity (for rated output)2.5 Volt Unbalanced5 Volt BalancedSignal To Noise Ratio (A-Weighted)120dB below rated output, Unbalanced124dB below rated output, BalancedIntermodulation Distortion0.005% maximum, if the instantaneous peak power output does not exceed twice the rated p
8、ower output for any combi-nation of frequencies from 20Hz to 20,000Hz.Wide Band Damping FactorGreater than 40Input Impedance10,000 ohmsPower GuardLess than 2% THD with up to 14dB overdrive at 1,000HzPower Requirements100 Volts, 50/60Hz at 15 Amps110 Volts, 50/60Hz at 12.5 Amps120 Volts, 50/60Hz at 1
9、2 Amps220 Volts, 50/60Hz at 7.5 Amps230 Volts, 50/60Hz at 6.5 Amps240 Volts, 50/60Hz at 6.5 AmpsStandby: 0.5 wattsNote: Refer to the rear panel of the MC1.2KW for the correct voltage.Overall DimensionsWidth is 17-3/4 inches (45.09cm)Height is 12-5/16 inches (31.27cm) including feetDepth is 22 inches
10、 (55.88cm) including the Front Panel and CablesWeight147 pounds (66.7 kg) net, 172 pounds (78.0 kg) in ship-ping cartonShipping Carton DimensionsWidth is 31 inches (78.74cm)Depth is 28 inches (71.12cm)Height is 17-1/4 inches (43.82cm)Downloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料
11、库MC1.2KW3REAR PANELDownloaded from www.M manuals search engine 4SECTION LOCATIONSTOP VIEW WITH COVER REMOVEDBOTTOM VIEW WITH COVER REMOVEDDownloaded from www.M manuals search engine MC1.2KWBLOCK DIAGRAM56Downloaded from www.M manuals search engine 78INTERCONNECT1Downloaded from www.M manuals search
12、engine MC1.2KW910HEATSINK MASTER 749485 SCH and PCB2A 2BBIAS ADJUSTMENTOPERATE THE AMPLIFIER FOR 5 MINUTES WITH NO INPUT SIGNAL.HEATSINKS MUST BE COOL.ADJUST R13 FOR 18+ _2mV ACROSS PINS 1 & 2 OF J4. ADJUST BOTH MASTER HEATSINKS.Downloaded from www.M manuals search engine 1112HEATSINK SLAVE 749487 S
13、CH and PCB 3A 3BDownloaded from www.M manuals search engine MC1.2KW1314DRIVER 750760 SCH 412V11V-11VTHERMAMPAMPDRIVEDRIVEPWRTHERMTHERMTHERMPOWERPOWEROUTPOWERGNDGNDPOWEROUTPOWER365R418 OHM33.2kR10833.2kR107CONTROL INJ6:9CONTROL150kR59150kR39J6:8-12VGUARDINPUT +SENSORSENSORSENSORJ1:1J2:2TURN ON.1uFC10
14、22.1kR1012.21kR105470pFC9AMPDIFF.CURRENTAMP100pFC8SOURCECURRENT470pFC2SOURCECURRENT100pFC5DIFF.AMPVOLTAGEVOLTAGEVOLTAGEVOLTAGE47 .5 WR27FEEDBACK B2 OHMMETER V-DRIVEFEEDBACK B+DRIVE B-DRIVE A8 OHM2 OHMFEEDBACK AFEEDBACK A-72VJ6:6J6:4J6:5J6:1J7:4INPUT -J7:7J7:8J4:2J3:1SENSORJ6:3.1uFC1100R100100R5.47uF
15、C21213SGDQ7213SGDQ101.5kR352.21MR342.21kR103CONTROL10uFC1222.1kR32100R62213SGDQ8213SGDQ11100kR78312Q37475R154POWERCONTROLCONTROL IN1.8pFC43475kR331kR60470pFC27806R57470pFC281kR4213Q68324R67SOURCE100pFC6312Q20470pFC31kR23.32kR75470pFC41kR3DIFF.806R30321Q641kR1806R64324R47SOURCECURRENT100pFC7321Q18806
16、R91DIFF.324R46312Q23220uFC41267R56365R71321Q565.36k.5%R38AMP2 10WR118221R49.01uFC37.15uFC35AMP365R88221R31.01uFC36.15uFC34AMP10uFC14RIGHT-DRIVE BFEEDBACK B10R15710R158FEEDBACK AMETER V+DRIVE+DRIVE A10R156J7:5J7:61.5kR3733.2kR104312Q78J6:7312Q38CONTROLJ7:3312Q39475kR55J7:1213Q21324R42324R443.32kR7232
17、1Q14312Q16267R54312Q17321Q552 10WR11710uFC1610R155J7:2POWER GUARDJ9:3FEEDBACK B6.49k .5 %R51J1:3J3:410uFC11231-+84B+B-U1:1312Q664.75kR582.21MR40221R15310uFC19312Q36312Q13.32kR69213Q7247.5kR63324R48213Q15312Q19681kR70321Q75321Q63100kR79324R433.32kR53.022uFC391234LDR1213Q62213Q61312Q22312Q13681kR68321
18、Q60324R45J2:4J1:4J9:2.15uFC325.36k.5%R50J6:10213Q41J2:3J1:6J4:4J9:1.15uFC33FEEDBACK AJ9:4J6:11213Q42J4:3J3:3J3:6J3:247 .5 WR74J3:747uFC15312Q6733.2kR106221R15247.5kR61J1:52 10WR114312Q122 10WR116365R93J3:56.49k .5%R36657-+U1:2TURN/ONTURN/ONTURN/ON-12V-12V-72VR-72VR-72VR-72VR-72VR-72VR-72VR-72VR-72VR
19、-72VR11V11V11V-72VR-72VR72VR72VR72VR-12V12V11V-11V11V11VMONO/B72VR72VR72VR72VR72VR-72VR72VR72VR-11V-11V11V72VRJ7:10J6:2METER LIGHTCONTROLMETER LIGHTCONTROL3B75J1-10J1-173BJ1-9J1-32B3AJ1-7J1-32AJ1-75J1-35J1-45J1-55J1-65J1-77J1-117J1-8GND7J1-77J1-6-.1V-.1V-.1V-.1V-19V-19V-18V16V16V16V16V-12V11V11V11V7
20、77555J1-5J1-4J1-3J1-8J1-9J1-100V0V0V0V0V-70.3V.6V.6V0V-70.3V-70.3V-69.7V-70.3V-1.74V-1.74VJ1-4J1-4T2T2J1-2J1-3J1-2J1-5J1-2J1-4J1-3J1-1T2T2J1-1J1-2J1-6J1-2J1-5J1-12B2B1173B2B2B2A3A1172A3A2A2A2A2A72VGND72V1.74V-1.74V1.74VGND70.3V70.3V70.3V0V-.7V-.6V-.6V69.7V70.3V1.74V71V70.4V-71V0V.6V.7V.6V0V-70.3V-70
21、.3V-70.3V-69.7V-1.74V-70.3V0V0V0V71V.7V70.4V70.3V70.3V0V-.6V-70.4V-71V-.6V-.7V69.7V70.3V1.74V70.3V0V70.4VDownloaded from www.M manuals search engine 1516DRIVER 750760 PCB 4INPUT 750753 SCH and PCB 5702473Q67C15Q23Q16Q17C21R67Q75R79Q14C5R157R158Q19R48Q72Q15R64R53Q20C6R70C9Q12R88J2Q41R39R4R2R57C3R69J7
22、R34R37R40R35LDR1C27+C12-R100C11R5Q63R47R43R51R49C37Q68R50Q10Q78Q11R152Q7R58Q8R32R153R104C19R105Q37R106C33R108Q38R107Q39R101Q36Q1C14R41Q55J1R74C35R93R59R71Q56Q42C16R27R114J3C32R118J9R117R103C34R116J6Q66R154R33R63R62R61C1C41R44R78R60U1C10R55C43C28R56C39R54R38R31C36RoHSR36Rev.AQ62R42Q60Q61R46129863R45Q
23、64Q18C7C4Q13R91R72Q21Q22C8R68R156R155R3R1C2R30R75J4INOUTGNDOUTCONTROL INPOWERINPUT-INPUT+POWER CONTROL4231S-+GJ4251J11251J1210uFC410uFC6187kR13922pFC12.1uFC9GND187kR132100R13010kR131power control outpower control in10kR142.1uFC10POWER CONTROL OUTPOWER CONTROL IN47pFC8657-+U1:2456213S1231-+84B+B-U1:1
24、231J210kR140POWER CONTROLJ7:8J7:9POWER CONTROLJ7:10J7:4J7:5J7:2J7:1J7:6J7:3J7:711V-11V-11V11V4231S-+GJ50V0V0V444444444J7-4J7-5J7-8J7-10J7-9J7-7J7-6J7-3J7-1J7-2NCMETER LIGHT CONTROLGND-11V11V11V-11V-11V-11V4702471R130J12J11C10C9R142C8C12C6S1R131J2R139R132J5C4J7J4R140U1Downloaded from www.M manuals se
25、arch engine MC1.2KW1718CAPACITOR 749367 SCH and PCB 6Downloaded from www.M manuals search engine 1920METER POWER SUPPLY 750752 SCH 1 of 270V0V0V0V1.82kR760VD140V12T1METER V+1.82kR750V0VCALIBRATIOND4-.5VDC AMPMETER -0VMETER V-22.1kR731000uFC110R35D7D6200kR30D110MR8100kCCW123R1METER-.65VRECTIFIER.1uFC
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