Nobels_pa460r_pa 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 12%(/6?(OHFWURQLFV Barnerstrasse 42, 22765 Hamburg, Germany - email: 1 2f 27-Jan-200017:53:57 R:$PROAMPSPA460RDSGNPM460R2F.SCH Title Size: Number: Date: File: Rev: Sheetof Time: A4 PA-460R (c) 1999 - ALL RIGHTS RESERVED All unspecified capacitors in uF, resist

2、ors carbon 5% 2 4 1 J101 J8003 2 3 1 J102 XLRM 2 3 1 84 U101A 4558 6 5 7 U101B 4558 R106 18k R107 100k R101 560 R102 560 R104 5k6 R105 10k R103 47k R108 100k R109 1k R110 1k R112 10k R113 10k R114 10k C101 22u C102 22u C104 100p C103 100p 13 2 P102 B100K C/T 13 2 P101 B100K C/T C109 33n C107 1n 2 3

3、1 84 U102A 4558 R115 1k C110 1u 13 2 P103 B50k Bass Treble Volume 6 5 7 U21B 4558 CHANNEL 1.4 R21 18k C23 1u R24 1k R25 1k R26 10k R28 10k R27 39k 13 2 P22 B100K C/T 13 2 P21 B100K C/T C25 39n C24 1n8 Bass 2 3 1 84 U21A 4558 C26 10u 13 2 P23 B10K C/T MASTER MASTER SECTION R111 220 C108 0.1 13 2 P104

4、 B50k R116 15k R117 15k C22 100p R22 1k 2 3 1 J41 Dual RCA Input R41 10k R42 10k 2 4 1 J42 J8003 R43 10k 13 2 P41 B50k C41 10u C43 1u 2 3 1 84 U41A 4558 R44 2k2 R48 15k R47 33k C42 100p 2 4 1 J21 J8003 2 4 1 J22 J8003 2 4 1 J23 J8003 R30 1k OUTPUT REVERB Shielded cable! 2 Springs 600-2.2K R54 2k2 C5

5、3 22n C57 47p 13 2 P51 B50K R52 56k R59 15k C56 33n C55 3u3 + 6 - 4 IN- 2 IN+ 3 GN1 1 GN2 8 OUT 5 BYP 7 U52 LM386 1 2 3 4 Rev51 REVERB R53 10k L51 22uH R29 820 SEND RETURN R77 10/0.5W C69 100n 2 4 1 J61 J8003 SPEAKER 1 R67 6k8 R65 1k R64 12k* R69 39k R68 1k R70 2k2/0.5W R66 100k C64 22u C65 33p C68

6、47u 3 21 Q63 C3198GR R71 2k2 C62 100p 3 21 Q64 C1027 3 21 Q66 D1047 R75 0.5/5W R76 0.5/5W R73 220/0.5W 3 21 Q67 B817 3 21 Q65 A1023 R74 220/0.5W R72 150 +VCC -VCC 2 4 1 J62 J8003 13 2 TP61 B500 C67 33p D64 4148 D63 4148 C66 100u 3 21 Q61 A1266GA 3 21 Q62 A1266GA C63 47u R63 100k C61 2u2 R61 2k2 D61

7、4148 D62 4148 R62 6k8 S1 SRA1101 F1 FUSE C1 *S/K 1n/500V J1 AC Socket -+Br1 KBU6J C8 4700u/50V C9 4700u/50V 8 7 6 3 2 14 5 Tr1 MT-60E D4 4002 D3 4002 D2 4002 D1 4002 C2 220u/25V C3 220u/25V I 1 O 3 - 2 U1 7815 I 1 O 3 - 2 U2 7915 C6 220u C7 220u C4 0.1u C5 0.1u C105 10u C106 22u +U101 +U102 +15V -U1

8、01 -U101 -U102 C21 1u Rev/Efx Treble 2 3 1 84 U51A 4558 AC120V 4.0A AC230V 2.0A -VCC +VCC CD/TAPE LEVEL CD INPUT AUX INPUT MIC INPUT LINE INPUT 1) SVA/B500: *SVA Adj. *Bias Adjustment Q67 Base to GND 2) Res/R64: Q66 Base to GND 1/4W 12K-15K= DC 0.58V = DC 0.58V = DC 0.58V SPEAKER 2 *Adj 6 5 7 U51B 4

9、558 C51 1u R51 47k C52 100p 2 4 1 J91 J8003 2 4 1 J51 J8003 C59 3u3 C50 2u2 R50 33k PA PA R60 100k R57 100k Component Designators For Ch: 1.4: 1xx . 4xx EFX SEND EFX RETURN P-Sig E-Sig CLIP CLIP 6 5 7 U41B 4558 R84 220 R86 2k2 R82 56k R83 47k R85 1k8 R81 56k D81 4148 D83 5mm LED Red D82 5mm LED Gree

10、n 3 21 Q81 C3198 C82 0.33u +15V R56 1k R55 100k C58 1u R58 1k +U21 -U21 +U51 -U51 +U41 C54 10n C13 47u R13 100 R14 100 C14 47u -U41 C11 47u R11 100 R12 100 C12 47u +U101 -15V +15V -15V +15V+U102 -U102 C15 47u R15 100 R16 100 C16 47u +15V -15V +U41 -U41 -15V C17 47u R17 100 R18 100 C18 47u +15V -15V +U21 -U21 C19 47u R19 100 R20 100 C20 47u +15V -15V +U51 -U51 +U51 GND C81 1n 收音机爱好者资料库 Ra d i o Fa n s .CN