McIntosh-C2300-pre-sm(1) 维修电路原理图.pdf
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1、C2300SERVICE MANUALPerformance Specifications .2Notes .2Rear Panel .3Section Location .3Block Diagram .4Interconnection Diagram .5 - 6Main Schematic and PCB .9 - 22Display Schematic and PCB.23 - 28Balanced Schematic and PCB .29 - 34Tube Schematic and PCB .35 - 42Data Schematic and PCB .43 - 46Pushbu
2、tton Schematic and PCB .47 - 48Headphone Schematic and PCB .49 - 50Meter Lamp Schematic and PCB .51 - 52Parts List .53 - 62Repacking Instruction .63CONTENTSSERIAL NO. YA1001 And AboveC2300TUBE PREAMPLIFIERRadioFans.CN 收音机爱 好者资料库PERFORMANCE SPECIFICATIONSGeneral SpecificationsFrequency Response+0, -0
3、.5dB from 20Hz to 20,000Hz+0, -1dB from 10Hz to 100,000HzTotal Harmonic Distortion0.08% from 20Hz to 20,000HzRated Output (Main)2.5V Unbalanced, 5V BalancedMaximum Voltage Output8V RMS Unbalanced, 16V RMS BalancedSensitivity (for rated output)High Level, 450mV unbalanced, 900mV balancedPhono MM, 4.5
4、mVPhono MC, 0.45mVSignal To Noise Ratio (A-Weighted)High Level, 93dBPhono, 80dBInput ImpedanceHigh Level, 20K ohms unbalanced, 40k ohms balancedPhono MM, 47K ohms; 50 to 750pF, in 50pF stepsPhono MC, 25, 50, 100, 200, 500 or 1,000 ohms; 100pFMaximum Input SignalHigh Level, 5V Unbalanced, 10V Balance
5、dPhono MM, 50mVPhono MC, 5mVVoltage GainHigh Level to SRVR(REC) Output: 0dBHigh Level to Main Output: 15dBPhono MM to Record Output: 40dBPhono MC to Record Output: 60dBOutput Impedance220 ohmsHeadphone Load Impedance16 ohms to 250 ohmsTube ComplimentMM Phono Circuitry: 2 - 12AX7AMC Phono Circuitry:
6、2 - 12AX7AHigh Level Circuitry: 2 - 12AX7APower Requirements100 Volts, 50/60Hz at 75 watts110 Volts, 50/60Hz at 75 watts120 Volts, 50/60Hz at 75 watts220 Volts, 50/60Hz at 75 watts230 Volts, 50/60Hz at 75 watts240 Volts, 50/60Hz at 75 wattsStandby Power, less than 2 wattsNote: Refer to the rear pane
7、l of the C2300 for the correct voltage.Overall DimensionsWidth is 17-1/2 inches (44.45cm)Height is 6 inches (15.24cm) including feetDepth is 18 inches (45.72cm) including the Front Panel, Knobs and CablesWeight29.5 pounds (13.41 kg) net, 44.9 pounds (20.41 kg) in shipping cartonShipping Carton Dimen
8、sionsWidth is 25 inches (63.5cm)Depth is 27 inches (68.6cm)Height is 12 inches (30.5cm)NOTES1. 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 condi- tions: a. AC input at 120 volts,
9、50/60Hz. b. All voltages are +/-10% with respect to 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 indic
10、ates: a. Polarized Capacitors - Positive b. Diodes - Cathode c. Others - Pin 15. WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer.6. Use McIntosh Remote Control Model HR061 with the C2300.2RadioFans.CN 收音机爱 好者资料库C2300SEC
11、TION LOCATIONREAR PANEL3BLOCK DIAGRAM4C2300INTERCONNECT156NOTES78C2300910GNDGND51.1R 623B3B3B3B249R 63INPUTS0VR0V1.5kR751.21kR78RIGHT MCLEFT MC2J1L1J1321Q14110R 56321Q12110R 54321Q1851.1R 64321Q1622.1R 711000pFC 4222.1R 701.5kR77312Q201.5kR761000uFC 47220uFC 51312Q191000uFC 46220uFC 501.5kR741.21kR8
12、1312Q281.21kR80312Q271.21kR79312Q36312Q35475R85475R8422pFC5714678235-+U914678235-+U8.1uFC 622.21R91.1uFC 612.21R892.21R881kR931kR92J4:11TO TUBEJ4:10J4:9J4:12321Q131kR 551kR 57321Q11249R 65321Q17321Q151000pFC 431000uFC 49220uFC 531000uFC 48220uFC 52312Q21312Q22312Q29312Q30312Q37312Q382.21kR 872.21kR
13、8622pFC56.1uFC 632.21R90.1uFC 60MC PH4.75kR604.75kR694.75kR584.75kR67MC OUTMC OUT1000pFC 4522.1R 731000pFC 44312Q24100pFC 41312Q234.75kR594.75kR6610uFC 59312Q32312Q31J2:2J2:3J2:4J2:11kR 531kR 5222.1R 72100pFC 40312Q25312Q264.75kR614.75kR681000pFC 55475R831000pFC 54312Q33312Q3410uFC 58475R82-15V-15V-
14、15V-15V15V15V15V15VMC1MC2MC3MC4MC1MC2MC3MC40V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V.6V.6V.6V.6V.6V.6V.6V.6V.6V.6V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V0V.6V.6V.6V.6V.6V.6V.6V.6V.6V.6V0V0V0V0V0V0V0V0VMAIN 750761 SCH 1 OF 62A1112MAIN 750761 SCH 2 OF 62B4A4A4A4A4A4A4A4A4A4A4A3A3A3A3A3A5VDVDNCGNDGND
15、GNDGNDLEFT-RLRLRL0V0V0V0V0V0V0V0V0V0V0V0V0VLEFT0V0V0V0V5V0V0V0V0V0V0V5V0V0V0VRLSERVER (REC)GNDGNDMMMCMC-24v-24vNC24v24v3B3B3B3A3A3B3C3C3A3A3A3A3AJ4:6J4:9J4:10J3:1J3:2J3:4J3:5J3:6J3:7J3:9J3:10J3:11J3:124A4A4A4A4A4A4A3A3A3ACDAUXCDRGNDGNDGNDGND100kR11LLR0V0V20KR350V0V5V0V0VMAINMMMAINNC3B3B3AJ4:8J3:3J3:
16、8100kR12CONTROLJ9:1CONTROLJ9:2CONTROLJ9:3J9:4CONTROLJ9:5RIGHT-J9:11J9:12J9:13J9:14J9:15LEFT-LEFT+J9:18R MM OUTJ4:2J4:1J2:1J1:2J1:15V5V5V5V5V0V0V0V0V0V0V0V0V10kR13MM43CDRL1RDVD2LTUNER100pFC2420KR40100pFC260V5V5VINPUTDRIVERCONVERTER0V5VDECODERDECODERINPUTDECODERDECODER0VOUTPUTSR MC OUTL MC OUTTUBE ONT
17、UBE ONTUBE ONTUBE ONTUBE ONJ9:6RIGHT-J9:10J9:9J9:8J9:7RIGHT+RIGHT+LEFT+J9:17J9:16J4:3J4:4L MM OUTJ2:2R MM INL MM IN0V0V0V0V100kR2220pFC147pFC2321Q147pFC4321Q4100kR3220pFC310kR8100kR1047.5kR181kR2047.5kR171kR190V2J6:20VINPUTSINPUTSR1J12:1SRVR1J11:12CDR1J10:12J10:2AUX2J9:22J8:212J7:21J7:1220k34R22:222
18、0k34R21:2220k12R22:110uFC15220k12R21:110uFC13220k12R24:110uFC1110uFC12220k12R26:110uFC20220k34R23:210uFC10220k34R25:210uFC1810uFC172134K62134K52134K210uFC2210uFC2140.2kR341kR3240.2kR33100pFC2340.2kR311kR29100pFC28100pFC2520KR395VDRIVERRIGHTCONVERTER0V100kR42.1uFC35220pFC36221kR49221kR480V1J13:110uFC
19、38TUBE ON100kR4321Q2100kR1321Q3100kR910kR141J6:12J12:22J11:21J8:11J9:1220k34R24:2220k34R26:210uFC1410uFC16220k12R23:1220k12R25:110uFC910uFC192134K12134K32134K42134K8221kR27221kR2840.2kR30100pFC27678912345141516171810111213GNDU1678912345141516171810111213GNDU2.1uFC30.1uFC29100kR4121354K17.1uFC31.1uFC
20、3421354K1810uFC372J13:210uFC39BALANCED TO UNBALANCEDBALANCED TO UNBALANCED1kR471kR43221R50J14:12J14:8J14:7J14:3J14:2GP1390pFC5100pFC6321Q510kR5100pFC8321Q8390pFC710kR610kR1610kR1520KR362134K142134K132134K1022uFC321kR451kR44J2:5J2:6J2:7J14:9J14:10J14:11J14:5J14:4J14:6J14:1321Q610kR7321Q72134K92134K11
21、2134K122134K1622uFC331kR46QF5QG6QD3QA15QB1GND8QH7SQH9OE13VCC16QC2QE4LCLK12RESET10SCLK11DATA14U6QF5QG6QD3QA15QB1GND8QH7SQH9OE13VCC16QC2QE4LCLK12RESET10SCLK11DATA14U4221R51J2:8QF5QG6QD3QA15QB1GND8QH7SQH9OE13VCC16QC2QE4LCLK12RESET10SCLK11DATA14U5QF5QG6QD3QA15QB1GND8QH7SQH9OE13VCC16QC2QE4LCLK12RESET10SC
22、LK11DATA14U7J5:18J5:17J5:7J5:6J5:14J5:15J5:16J5:9J5:10J5:11J5:12J5:5J5:1J5:3J5:2J2:12J2:10J2:11J2:9J4:2J4:1J3:2231-+84B+B-U3:1J5:13J5:4J5:8J3:1657-+U3:2595CSACC_OND/A_CONTROLCD_CONTROLCDR_CONTROLDVD_CONTROLL_MCL_MMLEFT-LEFT-LEFT+LEFT+MC_CONTROLMC_CONTROLMM_CONTROLMM_CONTROLPC_SPKR1PC_SPKR2POWERONR_M
23、CR_MMRIGHT-RIGHT-RIGHT+RIGHT+SCLKSCLKSCLKSCLKSDATASQH1TU_CONTROLTUBE_LIGHTTUBE_LIGHT-15V-15V-15V-15V-15V-15V-15V-15V-15V15V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V5V-24V24VLISAUD-LLISAUD-RMONOMUTESPKR1SPKR2MC1MC2MC3MC4MM1MM2MM3MM4L_MMR_MMMETER_MUTE5V5V5V5VL_MCR_MC15V-15VMM3MM4MM1MM2MM3MM4MM1
24、MM210uFC1615V100kR238220pFC1621kR239595CSHDPH MUTE5V5V5VTO J33 PIN3Ext_Lamp_ControlTO BALANCED (INPUT)TO TUBETO TUBE (MC)TO TUBETO TUBE0V0V0V0V0V0V0V5V5V5V5V5V5V5V5V5V5V0V0V0V5V5V0V5V5VC23001314MAIN 750761 SCH 3 OF 62C0V0V0VLEFT0V5V5V5V0V-5V0V0VLEFT5V5V5V5V5V.6V0V0V0V0V.6V0V-9dB0V0V.6V0V0V-15V15V-5V
25、5V0V0V47.5kR1810V267kR1830V5V0V267kR1853CJ6-113CJ6-103CJ6-93CJ6-83CJ6-63CJ6-53CJ6-43CJ6-3J6-10V0V5V5V5V.6V.6V1MR204-3dB1MR207.6V.6V.6V1MR215.6V267kR218.6V-9dB.6V1MR233267kR182J16:3J16:4J16:8J16:9NEGATIVEPOSITIVE10uFC118.1uFC12310MR199DECODERPOST ATTENUATORDRIVER.6V0V0V-3dB0V-6dB DRIVER0V.6V-9dB DRIV
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