Rega-Cursa-pre-sch维修电路原理图.pdf

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1、12345678 A B C D 87654321 D C B A Title NumberRevisionSize A2 Date:10-Sep-2002Sheet of File:F:ElexCursa.ddbDrawn By: R61 1K R62 1K R76 100R R71 100R C60 47pF D81N4148 8 NC 9 NO 7 3 NC 2 NO 4 + 1 - 10 RLA3 EA2-5 R45 100R R36 100R R41 470K R52 470K R60 1K R11 22K R46 100R R10 680R R33 100K R69 680R R5

2、6 470K R73 4K7 R55 100K R31 470K C29 6.8uF C34 6.8uF C40 100pF C50 100pF C28 100nF C33 100nF C55 1uF C47 1uF -15V C64 1000pF C23 1000pF 3 2 1 84 U6A TL072ACP 5 6 7 U6B TL072ACP +15V -15V D18 1N4148 D17 1N4148 D15 1N4148 D16 1N4148 C16 10uF/50V C17 10uF/50V Vin 1 GND 2 +15V 3 U2 LM7815CT Vin 2 GND 1

3、-15V 3 U1 UA7915UC 3 2 1 84 U7A TL072 5 6 7 U7B TL072 R53 470K R39 470K R51 560R R50 560R C52 100nF C44 100nF +15V -15V C59 470nF C48 470nF +15V -15V CDR CDL TUNL TUNR AU1L AU1R AU2R AU2L TA1LTA1R POTL POTR C49 22uF/50V C53 22uF/50V TAO1L TAO1R PREOL PREOR 8 NC 9 NO 7 3 NC 2 NO 4 + 1 - 10 RLA1 EA2-2

4、4 R22 4K7 R21 100R R26 100R R49 100K R44 100K SENS 1 SPKDC 2 SPKDC 3 GND 4 VEE 5 RLA 6 DIS 7 MT 8 VCC 9 U3 TA7317P R18 7K5 R9 330K R14 47K R7 75K R5 100K R3 33K R4 47K R12 15K C20 22uF/50V C13 0.47uF/100V C19 100uF/10V C25 100uF/10V D6 1N4148 R2 7K5 C26 1uF/100V R6 100K C18 100uF/10V C24 100uF/10V R

5、20 180R C15 100nF C14 100nF C12 100nF C11 100nF J6 GND D7 1N4148 TA1RTA1L R38 100K R43 100K Cursa Pre-Amplifier Ver#3 MUTE +5V TAPE/RLA1 R58 4K7 R54 4K7 C45 47pF R42 100R R64 22K Pre-amp output level Gain Range settings with 200mV input. xxxxxxxxxxxxxxxxx 1 = 0.2V (Tape1) 2 = 0.8V (Alpha) 3 = 1.2V (

6、Mute) xxxxxxxxxxxxxxxxx Switch S2 to on and then power up the pre-amp. Using Alpha, Mute & Tape1 set the gain level. Power down pre-amp Then turn S2 to off This puts the setting in memory. xxxxxxxxxxxxxxxxx Tape1 - 1 Volume LED on Alpha - 2 Volume LEDs on Mute - 3 Volume LEDs on 1 2 3 4 5 6 7 8 9 10

7、 SK9 10PIN_DUAL_ROW LIN RIN 1 2 3 4 5 6 7 8 9 10 SK8 10PIN_DUAL_ROW +15V -15V DISKR +15V -15V DISKL C27 100nF C21 100nF C22 100nF +UNREG T1 BC546B T4 BC639 R13 33K R47 8K2 C43 47pF 3 2 1 84 U4A TL072 5 6 7 U4B TL072R37 470K R25 470K R35 560R R30 560R C38 100nF C32 100nF +15V -15V C41 470nF C36 470nF

8、 C37 22uF/50V C39 22uF/50V R34 100K R32 100K R48 4K7 R40 4K7 C35 47pF D19 1N4148 8 NC 9 NO 7 3 NC 2 NO 4 + 1 - 10 RLA2 EA2-5 +5V TAPE/RLA2 TA2L TA2R TA2R TA2L TAO2L TAO2R PREOL PREOR T14 BC546B T8 BC546B +15V T9 BC640 T15 BC640 T10 2N5401 T2 2N5401 T12 BC639 T6 BC639 D21 1N4148 D22 1N4148 D13 1N4148

9、 D12 1N4148 D20 1N4148 D23 1N4148 D24 1N4148 D25 1N4148 D9 1N4148 D10 1N4148 D11 1N4148 D14 1N4148 R59 180R R17 180R R66 68R R72 68R R19 68R R24 68R R74 22K R27 22K R28 330R R65 2K2 C66 22pF C30 22pF +15V C65 100nF C68 100nF +15V -15V +15V T3 2N5401 T11 2N5401 R77 330R R67 680R R16 2K2 R8 680R R75 2

10、20R R29 220R LDC RDC RLA RLA L R GND SK1 RCA/2/M 1 23 4 S1 SW-DIP2 R15 22K R68 22K SK7 RCA/4/S SK3 RCA/4/S SK4 RCA/4/S SK6 RCA/4/S SK2 RCA/4/S C46 100nF C51 100nF R63 10K R1 1K5 LED1 LED D5 BZX85C15V CDR CDL TUNL TUNR AU1L AU1R AU2R AU2L SWR SWL 8 NC 9 NO 7 3 NC 2 NO 4 + 1 - 10 RLA7 EA2-5 RLA6 EA2-5

11、 RLA5 EA2-5 RLA4 EA2-5 +5V AUX1/RLA PHONO/RLA AUX2/RLA CD/RLA TUNER/RLA DISKL DISKR 8 NC 9 NO 7 3 NC 2 NO 4 + 1 - 10 RLA8 EA2-5 C42 22pF C62 22pF C54 100nF C56 100nF DGND DGND 12 LK1 LINK LIN 4 LGND 5 LMO 2 LFO 3 RFO 14 RMO 15 RIN 13 RGND 12 CSB 6 DATA 9 CCLK 10 MUTEB 8 AVDD 1 AGND 16 DVDD 7 DGND 11

12、 U5 WM8816 +5VAVDD DATA8816 CLK8816 CS8816 DGND C57 10uF/63V C58 100nF C61 10uF/63V Vin 3 GND 2 +5V 1 U8 uA78L05AC C63 100nF AVDD+12V T5 BCV62 JF1A U404 JF1B U404 T7 BC546B T16 BC546B C31 100uF/10V PR1 200K T13 BCV62 JF2A U404 JF2B U404 PR2 200K C67 100uF/10V S2 SW-SPST GAINSW Gain Range Enable AUX1

13、/RLA PHONO/RLA AUX2/RLA CD/RLA TUNER/RLA DGND +5V DATA8816 CLK8816 CS8816 TAPE/RLA1 MUTE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 SK5 FLAT23 +12V TAPE/RLA2 GAINSW GND Mods to MM/MC PCB. 1uF Polyprop 0.47uF Polyprop 4.7uF Polyprop Increase size Depth top & bottom C3 1000uF/35V C10 1000uF/35V J5 GND J4AC J1AC C6 1000uF/35V C9 1000uF/35V C8 1000uF/35V C7 1000uF/35V C4 1000uF/35V C5 1000uF/35V +UNREG -UNREG J3 GND J2 GND F1 2AT F2 2AT C2 1uF C1 1uF D3 1N4003 D4 1N4003 D2 1N4003 D1 1N4003 RadioFans.CN 收音机爱 好者资料库