Nobels_pre1_preampboostereq 电路图 维修原理图.pdf

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1、123456 A B C D E F 654321 F E D C B A 1 _RUc?5USdb_YSc Barnerstrasse 42, 22765 Hamburg, Germany - email: 1 PREAMP-BOOSTER / PRE-1 2 21-Jan-200015:46:10 R:$PROPEDSDSGNPRE-1PRE1R1.SCH Title Size: Number: Date: File: Rev: Sheetof Time: A4 CIRCUIT DIAGRAM (c) Copyright 1997 - ALL RIGHTS RESERVED All uns

2、pecified capacitors in uF, resistors carbon 5% OUTPUT low-curr. BYPASS INPUT GAIN TREBLE BASS EXTERNAL POWER SUPPLY XON XOFF XOFF XON LED1LED2 LED2 LED1 BA1 BA2 BA3 BA1 BA2 BA3 TR1 TR2 TR3 TR1 TR2 TR3 V-V- V- V- V-V- V+ V- V- Vs V- V-V-V- V- V- V+ V- V+ V+ V- V- V-V- V+ V+ V-V-V-V-V- Vs 50KB 50KB 10

3、0KA C101 1N C102 10N C105 47N C31 1 C40 1 C41 3.3 3 2 1 J2 J8004 3 2 1 J1 J8004 3 4 2 15 U1A 4558S 7 6 8 9 U1B 4558S C30 56N C20 10 C25 1 + C104 10 3 21 Q2 K222E + C103 1 C106 47N 3 2 1 J3 J8004 R102 100K R103 100K R104 1M R106 510 R32 330K R31 10K R30 200K R1 33K R2 1M R3 3K3 R10 10K R11 2K2 R111 1

4、M R33 330K R34 330K R40 200K R41 2K2 R42 200K D34148 D6 4148 3 21 Q1 BC264D R107 2K7 R110 2K2 D5 4148 1A 3 2A 6 3A 10 1SP 2 1DP 1 1DN 5 1SN 4 VDD 14 2DP 13 2DN 8 VSS 7 3SP 11 3Y 12 3SN 9 U101 4007 D2 4148 R108 2K2 R105 1M R23 10K C22 39N R21 1K5 R22 100 R20 8K2 C26 1N C23 22NC10 3.3 3 21 Q6 K30A-Y 3

5、 21 Q5 K30A-Y R109 4K7 R101 470K D101 4148 2 1 3 SW101A SW2204 5 4 6 SW101B SW2204 2 1 B1 SNAP + C203 47 + C201 220 5 4 1 J4 J7001 R203 100 R202 18k R201 18k + C202 220 12 D201 4001 C21 22N C24 12N C11 47P 3 21 Q4 C2362G 3 21 Q3 C2362G D1 3mm Green 13 2 P1 POTI 13 2 P2 POTI 13 2 P3 POTI 1 JP1A XSIP10 2 JP1B XSIP10 3 JP1C XSIP10 4 JP1D XSIP10 5 JP1E XSIP10 6 JP1F XSIP10 收音机爱好者资料库 Ra d i o Fa n s .CN