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1

2

3

4

5

6

C17 C15 180p R28 47k
6

R31 6k8 C18 10n
3 2

180p R30 47k
V+ 8

23# 2Qcc1]`\YVYUb
F

F

TREBLE
R6 3k9 U1B
6 2 4 1

R29 4k7

R5 47k C4 180p
V+

C5
3

C19
3 1

P2 C24
2

C16
7

1n R7 220 R8 47K
1

3

P6
2

INPUT
J1 R1 2k2 C11 10n

10n C6 100KA R27 1M
3

C2
7 3

U2B 3.3/50 KA4558

P5 50KC
2

4

5

V-

U2A KA4558

1/50

R33 150k
2

R35

J3 064-05E
1

47k 100KA

5

8

KA4558

2 1 3 2

1

1/50

HTJ-064-D1C2

P1 5KB C3
2

0.47/50

R36 10k

1

HI
E 1

BASS

PRESENCE

MASTER

C8 1/50

LINE OUT
E

R2 1M J2
2 4 1

VOLUME

V-

R0 2k2

R4 1M

100n

3 2

1

1/50

U1A KA4558

C7

P3 100KA

4

HTJ-064-D1C2

MID

LO
1

P4 5KB

A+ 2

1

D

R13 820
3

2

3

Q? C2235"Y"
1 3

SPEAKER
Q7 D525"Y"
1

LS1

D

Q3 A1015
2

C11 100p

R21 220

HB100-30

R17 470 C10
2 2

R23 0.5/3W
2

EXT. SPEAKER
2 4 1

J4 HTJ-064-D1C2

Q1 C1815
3

Q2 C1815
3

330p R16 22k

3

Q4 C3198
1

C13 47n
1

R24 0.5/3W

C14 47n
6 5 4 3 2 7 8 9 1

1

C

1

R18 390

C12 22/25 R12 47k R14 18k R15 1k5 C9 4.7/50 R19 2k2

2

3 2

Q6 A965"Y"
3

R68 220/2W Q6 D525"Y"
1

J3 064-05A
C

R25 10 1/2W

R22 R20 2k2 220

HEADPHONES

A-

B

SW SPST SW1

FUSE 250V T1A F1 T1 KBPC102
A+

B

D3-06
+

R37 2k2 C22 3300/35 C20 47/50 D1 15V

V+

J5 AC 230V 50Hz Power Cord HT-30S C23 3300/35 R38 2k2 C21 47/50 D2 15V

>?25Barnerstrasse 42, 22765 Hamburg, Germany
VTitle ANumber: Date:

A

Primary: AC 230V 50Hz Secondary: AC 19V x2 1,5A

http://wwww.nobels.com - email: [email protected]

A

CIRCUIT DIAGRAM

Nobels BC-30 Bass Amplifier Size:
27-Jan-2000
Time:

A4

Rev: 1 of

All rights reserved - Copyright NOBELS Electronics All unspecified capacitors in uF, resistors carbon 5%
1 2 3 4 5

17:50:01

Sheet 1

1

File:

R:\$PRO\AMPS\BC-30\DSGN\BC-30_3.SCH 6