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2

3

4

5

6

F

F

SW3C C501 + 6.8 R404 33K C404 2N7 C403
E

R501 15K

7 8 9 1

v9 100KA P8
3

V+

R503 100K R510 2K7 REPEAT C408 2N2 C409
V+

KPA4251
2

V+

R407 33K

1) CHORUS 2) VARIABLE
V+ V+

C502 4N7

R505 22K
V+ 9 8 6

R507 10K
5

R508 27K SW4B
2

D501 LED GREEN
E

JP3 Jumper to lower PCB
1 2 3 4 5 6

V+

5

9

270P R401 150K C401 R402 12N C400 1N R403 100K
V3 3 4

V+

R408 12K
2

1

R409 820
3 4 IN VGG

U5
O1 O2 CP1 CP2 7 8 2 6

10N
7

R416 8K2 +

C412 33 C411 3N3

KPA2251

R504 22K

R412 R411 8K2 56K

R413 4K7 C407 3N3

R414 4K7

R415 4K7

7 8 6

56K

4558
5

U3A
VV+

U3B 4558 C410 2N2

SW4A KPA2251
6 4

V-

6-POL

U9B 4558 R506 10K JP2

R509 27K

3 V-

R405 68K TP1 TP 50KB R406 82K
V1

C405 2N7 C406 0.1
V-

R410 10K

MN3207
1 V-

1) EFFECT OFF 2) EFFECT ON

V-

VFREQ.

BIAS ADJUST
D

2

R513 27K
V+

2-pol shielded wire R515 3K3 C503
8

1

V-

INTERCONNECTION C505
3

D

C402 0.1

RIGHT LEFT SF 10KA P7B
6 V+

J51

C506 + 33 C907

W7 WIRE V+

R511 10K

+ 33

9

2 1

7 6

+ U10B 4558 R514 27K 33

J8004
V-

SW3D
C 2 10

4

v9 250KB P4

3

1

R602 1M8

C601 0.1

R608 47K

R701 10 C603 0.1 U4A
2 4

LM386
ININ+ GN1 GN2 + 5 2 3 1 8

470 C905
OUT BYP 5 7

6

R905 10

3 2

PHONES J91

9

W5 WIRE
1

16

11 12

R604

7 8

R610 3K6
1 2 13

OUTSIDE PCB

3

D601 LED RED

C701 470

V+

R512 10K

3 4

1

4558
5

2

C504 R516 + 33 3K3

-

220 R903 10

R906 10 SW5A SK22D02
3 2 1 V-

1

J8004
C

R606 33K

470K 6 KPA4251 U4B 4558

4558
5

U6
PP P1 P2 VDD CIN VCOUT SIN CX 3 4 14 6 7 5 11 12

U10A

4

U7

V-

V-

C903 0.1 R901 2K7 R902 +
V+ 6 V-

R601 3K3

R603 470K

1) CHORUS 2) VARIABLE

R605 120K

R609 120K 1) CHORUS 2) VARIABLE
4 5 6

R703 1M C702 1N W6 WIRE
1

+

C901 33 C902 33

V6

AUX
3

VOLUME

J92

5 4

2 1

SPEED
3

R607 82K
2

9 10 15

R705 6K8
3 2

VCOIN DEMO ZEN VSS

B

INTENSITY

P5 v9 250KB
1

SW3B KPA4251

4046 R611 2K7 R613 330K
8

R706 1K8

1

CX INH R1 R2

SF 10KA P7A
3

2K7

SW5B SK22D02
V-

J8004

LM386
GND ININ+ GN1 GN2 + 2 2 3 1 8 OUT BYP 5

C906 220
B 7

R704 1M

v9 50KB
3

P6 SW3A
2

R904 10 C904 0.1
V-

C602 220
W4 WIRE V+ W8 WIRE V+ W2 WIRE V+ W3 WIRE V+ V+ V+

R612 2K7

KPA4251 R702 10 C703 470 TIME 1) CHORUS 2) VARIABLE
VVV-

1

V-

4 V-

U8

R801 100K C801 470 C802 100

3 4

4558 U9A
5

2

12%(/6 (/(&7521,&6
http://wwww.nobels.com - email: [email protected]
Title Number: Date: All rights reserved - Copyright NOBELS Electronics All unspecified capacitors in uF, resistors carbon 5% 5

1

Barnerstrasse 42, 22765 Hamburg, Germany
A

A

R802 100K

V-

EFFECT BOARD / UPPER PCB

STEREO & BASS PAK
4-Feb-2000
D:\STP_E15.SCH 6 Time:

Size: A4 Sheet 2

Rev: 15 of

V1 2 3

12:40:36

2

File:

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