McIntosh-C45-pre-sm维修电路原理图.pdf

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1、SERVICE MANUAL Performance Specifications . 2 - 3 Rear View and Section Location . 4 Block Diagram . 5 - 8 Interconnection Diagram . 9 - 10 Main Schematic and PCB . 13 - 26 Display Schematic and PCB . 27 - 32 6 Channel Schematic and PCB. 33 - 36 Tone Schematic and PCB . 37 - 38 Data Schematic and PC

2、B. 39 - 40 Pushbutton Schematic and PCB . 41 - 42 Tuner/RAA1 Schematic and PCB . 43 - 46 Tuner AM/FM Alignment Procedure. 47 - 48 Parts List . 51 - 60 Exploded View and Parts Lists . 61 - 65 Repacking Instructions . 67 CONTENTS AUDIO CONTROL CENTER SERIAL NO. XF1001 And Above Serial Number XF1001 An

3、d Above RadioFans.CN 收音机爱 好者资料库 PERFORMANCE SPECIFICATIONS Frequency Response +0, -0.5dB from 20Hz to 20,000Hz Total Harmonic Distortion 0.002% maximum from 20Hz to 20,000Hz at rated output Signal To Noise Ratio Phono: 86dB below 10mV input (A Weighted) High Level: 96dB below rated output (A Weighte

4、d) Rated Output Voltage 2.5V Unbalanced Outputs (Main) 5.0V Balanced Outputs (Main) Maximum Voltage Output 8V Unbalanced 16V Balanced Output Impedance 250 ohms Unbalanced 500 ohms Balanced Input Impedance Phono: 47k ohms, 65pf High Level: 22k ohms Unbalanced, 50k ohms Balanced Sensitivity for Rated

5、Output Phono: 4.5mV High Level: 450mV Unbalanced, 900mV Balanced Maximum Input Signal Phono: 50mV High Level: 5V Unbalanced, 10V Balanced Voltage Gain Phono to Tape/VCR Out: 40dB Phono to Output (Main): 55dB High Level to Tape/VCR Out: 0dB High Level to Output (Main): 15dB Tone Controls Bass Control

6、: 12dB at 30Hz Treble Control: 12dB at 10,000Hz Power Requirements 100 Volts 50/60Hz, 35 watts 110 Volts 50/60Hz, 35 watts 120 Volts 50/60Hz, 35 watts 220 Volts 50/60Hz, 35 watts 230 Volts 50/60Hz, 35 watts 240 Volts 50/60Hz, 35 watts Note: Refer to the rear panel of the C45 for the correct voltage.

7、 Overall Dimensions 17-1/2 inches (44.45cm) W, 6 inches (15.24cm) H, including feet, 16-1/2 inches (41.91cm) D, including clearance for knobs and connectors. Weight 21 pounds (9.53kg) net, 35 pounds (15.88kg) in shipping car- ton OPTIONAL TM1 TUNER FM Tuner Useable Sensitivity 14dBf which is 1.4uV a

8、cross 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 20Hz to 15,000Hz Stereo: +0, -1dB from 20Hz to 15,000Hz Harmonic Distortion Mono: 0.3% at

9、100Hz, 0.3% at 1,000Hz, 0.3% at 10,000Hz Stereo: 0.45% at 100Hz, 0.45% at 1,000Hz at 1000Hz, 0.65% at 10,000Hz Intermodulation Distortion Mono: 0.25% Stereo: 0.45% Capture Ratio 1.2dB Alternate Channel Selectivity 75dB Spurious Response 100dB Image Response 75dB RF Intermodulation 65dB 2 RadioFans.C

10、N 收音机爱 好者资料库 3 1. The heavy notes 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 120 volts, 50/60Hz. b. All voltages are +/-10% with respect to ground. A high impedance (

11、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 - Positive b. Diodes - Cathode c. Others - P

12、in 1 5.WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer. NOTES Stereo Separation 45dB at 100Hz 45dB at 1,000Hz 35dB at 10,000Hz SCA Rejection 65dB AM Tuner Sensitivity 20uV External Antenna Input Signal To Noise Ratio 48

13、dB at 30% modulation 58dB at 100% modulation Harmonic Distortion 0.5% maximum at 50% modulation Frequency Response 50Hz to 6kHz NRSC Adjacent Channel Selectivity 45dB minimum IHF Image Rejection 65dB minimum from 540Hz to 1,600kHz IF Rejection 80dB minimum PERFORMANCE SPECIFICATIONS cont C45 RadioFa

14、ns.CN 收音机爱 好者资料库 4 REAR VIEW TOP VIEW WITH COVER REMOVED SECTION LOCATION RadioFans.CN 收音机爱 好者资料库 56 BLOCK DIAGRAM C45 RadioFans.CN 收音机爱 好者资料库 78 BLOCK DIAGRAM cont RadioFans.CN 收音机爱 好者资料库 INTERCONNECT1 910 C45 RadioFans.CN 收音机爱 好者资料库 NOTES 1112 RadioFans.CN 收音机爱 好者资料库 131514 C45 MAIN 749850 SH 1 OF

15、 52A RadioFans.CN 收音机爱 好者资料库 161817 MAIN 749850 SH 2 OF 52B RadioFans.CN 收音机爱 好者资料库 MAIN 749850 SH 3 OF 52C 1920 C45 RadioFans.CN 收音机爱 好者资料库 MAIN 749850 SH 4 OF 52D 2122 RadioFans.CN 收音机爱 好者资料库 MAIN 749850 SH 5 OF 52E 2324 BLU BLU RED RED 8 8 8 8 8 8 8 8 8 8 8 1 1 1 1 1 5V 12V 33V 5V 0V 5V 0V 5V 0V

16、5V 5V 0V 5V 0V 5V 5V 5V 5V 5V 5V 0V 0V 0V 0V 0V 0V 0V 0V 5V 5V 5V -24V 5V 0V 5V 5V -24V 0V GND 5V 5V SS FIL2 FIL1 FIL1 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 3B 3B 3B 3B 3B 3B 3B 3B 3B 3B 3B 3B 3B 3B J8:18 J8:17 J8:16 J8:15 J8:13 J8:12 J8:11 J8:10 J8:8 J8:7 J8:6 J8:5 J8:3 J8:2 J8:1 8 8 8 8 8 8 33V 5V 5V 0V 0

17、V 5V 5V 5V 0V 0V 5V INPUT 5V 5V FIL2 5V 15V NC NC 5V FIL2 6 6 6 3B 3B 3B 3B 3B 3B 3B 3B 3B J8:14 J8:9 J8:4 TO DATA PCB TO POWER TRANSFORMER J3:2 12V J3:3 33V J3:4 J3:5 J5:1 J5:3 J5:4 J4:2 J4:3 J4:4 MPX J4:7 RED/YEL SDATA PLLCE SCLK TUNER_SS D5 D7 D10 D13 D9 5V REGULATOR 12V REGULATOR 15V REGULATOR -

18、24 REGULATOR 12V DRIVER INPUT DRIVER 0V POWERON TUNER_MUTE 0V 5V TRIGGER_B 0V 5V 0V 5V 0V 5V 5V 1 WHT GRN/ 0V DECODER DECODER DECODER FIL2 FIL1 FIL SCLK TRIGGER_B 15V 4.3V 0V 5V 5V 5V 0V IR_DATA 0V SCLK SQH1 595CE VOLCE VOLDA SDATA SDATA2 -24V 5V PLLCE FIL2 UPDATE IR MUTE CONTROL POWERON POWERON TRI

19、GGER B IR DATA TRIGGER A SQH1 595CE GND J1:23 PRESENT J1:22 VOLUME CLOCK IR MUTE J1:19 DATA J1:18 EX DATA J1:17 IR TO 595 CLOCK J1:14 SDATA2 J1:13 VFD -24V J1:12 SCLK J1:9 J1:8 PLLCE J1:7 KEYPAD UPDATE MPX J1:4 J1:3 J1:2 NC J3:1 5V GND J3:6 GND GND J5:2 TO OPTIONAL TUNER J4:1 J4:5 J4:6 SS VOLTS MPX

20、.047uF C172 F1 2A F3 2A .047uF C171 10uF C192 10uF C193 D8 D6 D14 D12 D15 22uF C174 D16 D11 12220k R244:A 8V 5V3 2 1 IN OUT U22 HS12 31 IN OUT U32 3300uF C178 3 2 1 IN OUT U24 HS2 -15V REGULATOR 3 1 2 IN OUT U25 1k R237 D17 3 4 2 1 K34 5V .1uF C183 10uF C186 .1uF C198 10uF C199 .1uF C180 10uF C184 .

21、1uF C182 220uF C187 5V 0V 0V 5V TRIGGER_A FRONT_6CH 0V 5V 0V 1 1 GRN GRN 100k R239 .1uF C188 CENTER 10uF C190 220pF C191 5.9 VAC FIL1 595CE TRIGGER_A 0V 5V VOLCK 595CE IR_DATA SCLK MPX FIL1 KEYPAD EXT DATA GND SCLK TUNER VOLUME CE J1:20 J1:21 VOLUME SDATA J1:15 J1:16 J1:10 J1:11 J1:5 J1:6 J1:1 1 GP2

22、 F2 2A 34 220k R244:B 3300uF C179 23 1 IN OUT U23 3 4 2 1 K35 .1uF C181 10uF C185 POWER TRANSFORMER .1uF C189 TO DISPLAY J23:4 J23:3 PLL DATA RIGHT LEFT J22:1 TUN SCLK J21:5 MUTE TUNER_MUTE 15V J18 J17 J16 08/06/02 res 129466 049850 6CH_SEL P1169 C45 MAIN (PS) 6CH2_CONTROL 6CH1_CONTROL 5V R_2CH L_2C

23、H 2CH_SUB BAL_CONTROL_6CH BAL_CONTROL_2CH TONE_BYPASS TAPE1_OUT TAPE_CONTROL SAT_CONTROL DVD_CONTROL CD_CONTROL PH/AUX_CONTROL 15V -15V SQH1 5V 1k R240 SDATA2 J7:2 J7:3 J7:7 J7:8 POWERON J7:12 J7:13 J7:17 J7:18 J6:1 TUNER_PRESENT EXT SENSOR J6:6 DATA PORTS J6:11 SCAN STOP J6:16 SCAN_STOP J6:21 J23:6

24、 J23:2 J23:1 J22:3 J22:2 J22:4 JMP1 PRESENT PLL CE J21:6 J21:4 J21:7 TUNER_PRESENT SCAN STOP J21:1 J21:2 SCAN_STOP J20 J19 47uF C173 470uF C17647uF C175 rev 05/21/03 res SUB_MUTE 2CH_CONTROL 6CH_CTL 5V 5V TAPE2_OUT INT_TU_CONTROL PH/AUX_SEL VCR_CONTROL CD2_CONTROL TU_CONTROL -24V 1k R241 IRMUTE J14

25、J15 F4 0.4A D3 J7:4 J7:5 J7:10 J7:9 1k R243 J7:15 J7:14 J6:4 J6:3 J6:2 J6:5 J6:9 J6:8 J6:7 J6:10 J6:14 J6:12 J6:13 J6:15 TUNER_SS J6:19 J6:18 J6:17 J6:20 J6:23 J6:22 J23:5 3300uF C177 J21:3 6 7 8 9 1 2 3 4 514 15 16 17 18 10 11 12 13 GND U26 6 7 8 9 1 2 3 4 514 15 16 17 18 10 11 12 13 GND U27 6 7 8

26、9 1 2 3 4 514 15 16 17 18 10 11 12 13 GND U28 6 3 1 12 11 10 7 5 4 2 15 14 9 13 QF QG QD QA QB OE QH QC QE LCLK SQH RESET SCLK DATA U31 6 3 1 12 11 10 7 5 4 2 15 14 9 13 QF QG QD QA QB OE QH QC QE LCLK SQH RESET SCLK DATA U29 6 3 1 12 11 10 7 5 4 2 15 14 9 13 QF QG QD QA QB OE QH QC QE LCLK SQH RESE

27、T SCLK DATA U30 4.99k R245 J12 J7:1 J7:6 1k R242 J7:11 J7:16 INT_TU_CONTROL T1 T1 T1 T1 T1 -38V -22V 22V C45 RadioFans.CN 收音机爱 好者资料库 2526 MAIN 749850 PCB2 RadioFans.CN 收音机爱 好者资料库 DISPLAY 749851 SH 1 OF 23A 2728 C45 RadioFans.CN 收音机爱 好者资料库 2930 DISPLAY 749851 SH 2 OF 23B J6:2 J6:3 J6:4 J6:7 J6:8 J6:9

28、 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E SS 5V 5V 5V 0V 0V 5V 5V 0V 5V 5V 5V 5V 5V 0V 5V 0V GND GND 5V C1 C0 R1 R0 R0 7 7 7 7 7 7 7 TO MAIN J6:1 J6:5 J6:6 2E 2E 2E 2E 2E 2E 2E 2E 2E 0V 5V 0V 5V 5V5V 5V 0V 5V 10 R4 TRIM 5V 5V 0V R2 R3 7 7 7 7 7 TO PUSHBUTTON J6:12 J6:13 J6:14 J6:17 J6:18 J6:19 J6:2

29、2 J6:23 TUNER_SS 0V SCLK LAMP_ON SDA SCL MPX 5V WDT 5V 0V 5V LAMP_ON 0V .1uF C11 5V 0V .1uF C8 5V 5V 5V 5V 5V 5V 0V 5V 5V 0V 5V ENTER TONE 5V IR_EXT 0V INPUT 129467 CONVERTED DATA 049851 5V 5V 5V 5V 5V IR_FP 5V FRONT 0V 0V 5V 5V J3:7 J3:4 J3:2 J3:1 J3:10 J3:8 J3:6 J6:10 J6:11 J6:16 J6:15 J6:21 J6:20

30、 -24V 5V 10 R8 10uF C9 3 1 2 Q1 ADCE 5V DS5 5V FIL2 10 R12 10uF C12 IR_FP WDT ADCE SCLK DS7 DS8 5V 100k R26 0V 220pF C14 1k R16 10k R3 5V 5V 1 3 2 Y1 12.0MHz 10k R7 5V 0V 0V 0V 5V 5V CONTROLLER DS10 5V 5V 5V 5V 0V 0V 5V 5V STANDBY/ON SETUP BYPASS IR_FP 0V SELECT 5V 10 9 8 U4:C 0V 5V 5 4 6 U4:B 10 9

31、8 U8:C FRONT PANEL IR PANEL IR 0V 5V 5V J3:9 J3:3 J3:11 J3:12 J3:5 100 R18 100 R20 100 R21 100 R19 10uF C15 7 RST 6 SCL 8 VCC 5 SDA 2 RST 3 WP 1 WDI 4 GND U2 DS3 13 12 11 U8:D SDATA TUNER_PRESENT CLOCKJ1:21 VOLCK IR MUTE IRMUTE VOLUME CE VOLUME IR_EXT IR_EXT DATA PORTS J1:16 IR_DATA VOLCE VOLDA 595

32、CLOCK 595CE IRMUTE SDATA SDATA -24V 595CE SCLKJ1:11 SCLK PLLCE TUNER_SS .6V PLLCE UPDATEJ1:6 KEYPAD_UPDATE MPX D4 MPX FIL2 FIL1J1:1 FIL1 324 R17 595CE SDATA MTGPAD3 MTGPAD2 SCL SDA MICROPROCESSOR ILLUMINATION 08/28/02 res P1169 C45 Display 2 of 2 VFDA VFCE .1uF C10 IR_DATA J2:11 J2:5 SIGNAL STRENGTH

33、 A/D CONVERTER .1uF C13 TUNER VOLUME PRESENT GNDJ1:23 J1:22 EXT SENSOR EX DATA DATA IR TO J1:18 J1:19 J1:17 VOLDA VOLCE VOLCK SDATA2 VFD -24V J1:13 J1:14 J1:12 SDATA2 SDATA SCAN_STOP PLLCE KEYPAD SCAN STOP J1:8 J1:9 J1:7 2.21k R25 DS6 SCAN_STOP FIL2 FIL1 J1:4 J1:3 J1:2 100 R13 3 4 2 1 K1 324 R23 324

34、 R24 SDATA2 324 R14 SCLK 5V MTGPAD1 2 3 4 5 6 7 8 9 1 R10 8x22k 47uF C7 DS9 FRONT PANEL WATCHDOG TIMER / RESET rev 05/13/03 res DS4 DS11 DS2 2 1 3 U4:A DATA PORT CONTROL TUNER_PRESENT VFCL J2:9 J2:4 J2:10 J2:6 KEYPAD_UPDATE J2:12 J2:1 J2:3 J2:2 J2:7 J2:8 J1:20 8 7 6 5 1 2 3 4 OUT CLK I/O - + Vcc GND

35、 REF IN ALG REF DATA CS U6 TREBLE BASS TONE J3 J1:15 J1:10 J1:5 324 R15 6 3 1 12 11 10 7 5 4 2 15 14 9 13 QF QG QD QA QB OE QH QC QE LCLK SQH RESET SCLK DATA U5 100 R22 2 3 4 5 6 7 8 9 1 R6 8x22k 6 6 5 5 3 VOL_B 1 5V 4 GND 2 VOL_A VOLUME CONTROL S2 2 1 3 U8:A 5 4 6 U8:B 2 3 4 5 6 7 8 9 1 R5 8x10k 13

36、 12 11 U4:D 20 VSS 40 VDD 21 P2.0 19 XT1 23 P2.2 24 P2.3 17 P3.7 16 P3.6 26 P2.5 14 P3.4 28 P2.7 29 PSE 12 P3.2 11 P3.1 31 EA 9 RST 33 P0.6 7 P1.6 34 P0.5 6 P1.5 36 P0.3 4 P1.3 38 P0.1 2 P1.1 39 P0.0 1 P1.0 22 P2.1 25 P2.4 15 P3.5 18 XTO 27 P2.6 30 ALE 32 P0.7 35 P0.4 5 P1.4 8 P1.7 10 P3.0 13 P3.3 3

37、7 P0.2 3 P1.2 U3 3 1 2 4 5 CCWCW S1 2 3 4 5 1 R27 4x22k RadioFans.CN 收音机爱 好者资料库 DISPLAY 749851 PCB3 3132 C45 RadioFans.CN 收音机爱 好者资料库 3334 6 CHANNEL 749852 SCH4 RS LS RF LF LS SUB RF LF 5V 5V 5V 5V1 LS GND SUB GND GND GND GND LF 2A 2A 2A 2A 2A 2A 2A 2A 2A J1:5 J1:6 J1:7 J1:8 J1:9 J1:10 J1:16 J1:17 J1

38、:18 RF 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V RS 0V 0V 0V -15V 0V 0V 0V 0V 0V 0V 0V LS- 15v LF- 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B J10:5 J10:4 J10:3 J10:2 J10:1 SUB RS 5V 5V2 5V RS GND GND RF 2A 2A 2A 2A 2A 2A 2A 2A 2A J1:4 J1:3 J1:2 J1:1 J1:13 J1:12 J1:11 J1:15 J1:14 TO MAIN RS LS SUB LF 2 3 1 S - + J9 2 3 1

39、S - + J8 0V 0V 0V 0V 0V 0V 0V 10uF C24 10uF C23 10uF C22 LF LS 15V-15V 0V 0V 5V 5V 0V 0V 0V 2B 2B 2B 2B 2B 2B 2B J10:9 J10:7 J10:8 10:6 2 3 1 S - + J7 2 3 1 S - + J6 2 3 1 S - + J11 2 3 1 S - + J5 2 3 1 S - + J12 10uF C21 D1 100k R30 TO MAIN 2 3 1 S - + J10 6 CHANNEL 2 INPUTS 6 CHANNEL 1 0V 0V 0V 0V

40、 0V 0V 0V 0V 0V 5V 5V 5V 5V2 5V FRONT 2 2CH FRONT 1 2CH 5V 5V 5V SUB_MUTE 0V 0V 0V 0V 6CH IN 2 6CH IN 1 FRONT 6CH CENTER CENTER 5V 221 R12 221 R11 5V 5V SUB_MUTE 20K R35 - BALANCED AMP 0V CENTER 20K R31 0V 0V 0V 0V 0V 0V 0V 0V -15V15V 2 CH 6 CH LS+ -15v SUB+ GNDB RF+ LF+ J10:17 J10:16 J10:15 J10:14

41、J10:13 J10:12 10uF C11 10uF C12 6 J2:D 5 J2:C 10uF C9 10uF C10 3 J2:B 2 J2:A 0V 0V 10uF C7 10uF C8 11 J1:G 12 J1:H 0V 10uF C5 6 J1:D 8 J1:E 10uF C3 10uF C2 3 J1:B 1 2 220k R6:A 3 4 220k R6:B 1 2 220k R5:A 1 2 220k R3:A 3 4 220k R3:B 1 2 220k R2:A 3 4 220k R2:B 3 4 220k R1:B 1 2 220k R1:A 3 4 2 1 K6

42、6CH2 3 4 2 1 K5 3 4 2 1 K4 6CH1 3 4 2 1 K12 D3 5V 3 4 2 1 K11 3 4 2 1 K10 D2 3 4 2 1 K8 3 4 2 1 K7 5V1 5V DRIVER DRIVER 10k R43 10k R45 5V 6CH1 6CH2 5V 0V 0V SUB MUTE 33.2k R24 221 R17 221 R18 33.2k R23 221 R16 33.2k R22 221 R13 221 R46 221 R44 221 R9 221 R10 221 R49 221 R47 221 R8 221 R7 3 4 2 1 K1

43、8 3 4 2 1 K17 D5 D4 22uF C30 100k R29 22uF C29 100k R28 22uF C26 22uF C27 22uF C25 - BALANCED AMP - BALANCED AMP 20K R34 SUB 20K R32 - BALANCED AMP 20K R33 RF 0V 0V .1uF C31 0V 0V 0V .1uF C34 .1uF C35 .1uF C36 GND RS- FRONT SELECT RS+ CENTER- SUB- CENTER+ RF- J10:18 J10:10 J10:11 10uF C6 9 J1:F 10uF

44、 C4 10uF C1 5 J1:C 2 J1:A 3 4 220k R5:B 3 4 220k R4:B 1 2 220k R4:A 3 4 2 1 K3 3 4 2 1 K2 3 4 2 1 K1 3 4 2 1 K9 33.2k R21 221 R14 221 R15 33.2k R19 33.2k R20 3 4 2 1 K15 3 4 2 1 K13 3 4 2 1 K14 100k R26 22uF C28 100k R25 100k R27 CENTER 5V 5V 5V - BALANCED AMP 20K R42 15V 20K R40J4:5 J4:6 J4:16 J4:1

45、7 20K R39 CENTER 5V2 5V1 10uF C19 OUTPUTS 10uF C18 10uF C17 10uF C38 10uF C37 10uF C16 10uF C15 10uF C40 10uF C39 10uF C14 10uF C13 20K R36 6 5 7 - + U3:B 2 3 1 - + U3:A - BALANCED AMP 20K R41 J4:1 J4:3 J4:4 .1uF C32 J4:7 J4:8 J4:9 J4:10 -15V J4:11 J4:12 J4:13 J4:14 15V J4:18 .1uF C33 1 3 2 Q2 1 3 2

46、 Q1 10uF C20 3 4 2 1 K16 6 5 7 - + U2:B 2 3 1 - + U2:A 2 3 1 - + U1:A 6 5 7 - + U1:B 20K R38 J4:2 J4:15 20K R37 J3:12 J3:2 J3:1 J3:18 J3:15 J3:17 J3:16 J3:11 J3:13 J3:8 J3:9 J3:7 J3:4 J3:5 J3:3 J3:14 J3:10 J3:6 RadioFans.CN 收音机爱 好者资料库 6 CHANNEL 749852 PCB4 3536 C45 RadioFans.CN 收音机爱 好者资料库 3738 TONE

47、749853 SCH and PCB5 0V 0V 0V 5V 5V 0V 2B 2B 2B 2B 2B J11:9 0V 0V 5V 47uF C10 47uF C11 0V 0V 2B 2B BASS 0V .1uF C26 15V .1uF C25 -15V TREBLE 40.2k R14 0V 3.32k R17 0V -15V 0V 0V 5V 0V BYPASS J11:13 R TO J11:14 GND J11:17 J11:18 R FROM J11:102B 15V 5V 2BJ11:8 J11:112B GND 2BJ11:1 L TO 2BJ11:2 L TO GND

48、 J11:52B J11:62B L FROM 22uF C1 .033uF C3 22uF C2 3 4 1 2 CCW R6:A 100k 7 8 5 6 CCWR6:B 100k 3 4 2 1 K4 5V 475 R7 3 4 2 1 K1 475 R8 3 4 2 1 K3 475k R11 475k R12 40.2k R13 .22uF C13 .22uF C14 470pF C16 0V 6 5 7 - + U1:B 100pF C17 0V 100pF C18 3.32k R18 15V 0V 10uF C24 10uF C23 10 R23 10 R24 0V R TO J11:15 GND J11:16 R FROM 2BJ11:12 -15V J11:72B GND J11:32B J11:42B GND L FROM