Nobels_prec_preampeq 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 1REHOV?(OHFWURQLFV Barnerstrasse 42, 22765 Hamburg, Germany - email: 1 PREAMP + EQ / PRE-C 2 27-Jan-200018:56:51 R:$PROCMPCTPRE-CDSGNPREC_2A.SCH Title Size: Number: Date: File: Rev: Sheetof Time: A5 CIRCUIT DIAGRAM (c) Copyright 1997 - ALL RIGHTS RESERVED All

2、unspecified capacitors in uF, resistors carbon 5% OUTPUT INPUT TREBLE BASS EXTERNAL POWER SUPPLY LEVEL MID non shorting switch! Power on / bypass Power on / bypass non shorting switch! pow pow V- V- V- V+ V-V-V-V- V+ V+ V+V+ V+ V+ V- V- V- V+ V- V+ V+ V- V- V- V- C201 220 3 2 1 J2 J8004 C202 220 12

3、D201 4001 C22 39N R22 100 C23 22N C25 3.3 3 2 1 J1 J8004 R18 100K R33 100K C32 2N7 R32 3K3 13 2 P4 V9 50KB 13 2 P2 V9 50KB 3 21 Q2 C2362G C20 2.2 C11 56N R43 82K R45 200K R47 1K5 R201 15K R202 15K C12 2.2 C21 22N C26 100P R21 2K2 3 4 2 15 U1A 4558S R16 11K 2 1 3 SW1A SK22F02 5 4 1 J3 J7001 7 6 8 9 U

4、2B 4558S 7 6 8 9 U1B 4558S R17 22K R20 8K2 R19 1K C16 2.2 R10 33K C14 100P C31 27N R12 3K9 R13 33K 13 2 P3 V9 30KB 3 4 2 15 U2A 4558S 5 4 6 SW1B SK22F02 D1 REDLED R46 2M2 R24 100K R23 10K C24 12N R34 2K2 C17 100P 13 2 P1V9 50KA C15 33 R15 1K R11 1M 3 21 Q1 K222E R14 56K D2 4148 R41 5K1 R44 100K C6 1 收音机爱好者资料库 Ra d i o Fa n s .CN