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A
B
C
1
2
3
4
4
4
100N
100N
C29
C30
U2:E
U3:E
63V
63V
11
11
100N
100N
C69
C259
5
63V
63V
MAINS VOLTAGE INPUT SETTING (NA<->CE)
6
7
8
9
SET JUMPER P200 TO "115V" FOR NORTH AMERICA.
SET IT TO "230V" FOR EUROPE.
10
11
A
B
C
D
E
F
G
.
6K8
C15
1/4W
47N
100V
R12
INPUTS[J1]
BASS
.
6K8
1/4W
M
R13
50K
P5
1B LIN
4494
R18
47K
.
R69
1/4W
100K
.
10N
C17
100V
1B LIN
4494
50K
P3
R14
R16
1/4W
M
1/4W
4K7
4K7
LOW-MID
.
.
100V
18N
C12
C13
680P
100V
1B LIN
4494
50K
P4
R15
R17
1/4W
M
1/4W
3K3
3K3
TREBLE
.
.
C16
680P
100V
D
E
F
G
H
I
J
100V
100P
C19
C40
R24
10N
100V
1/4W
1K0
MINI
R79
HI-MID
1/4W
R22
R72
1K0
1/4W
M
1/4W
MINI
4K99
4K99
MC33079P
MINI
50K
P6
1K0
.
.
1B LIN
4494
1/4W
U2:A
R117
10N
C18
100V
R53
R54
1/4W
1/4W
200K
200K
.
.
100P
C14
100V
C41
100P
100V
MC33079P
MC33079P
U2:B
U2:C
LEADS & PINS REFERENCE
MC33079P (YS#6804)
TL072CP (YS#6882)
MC33078P (YS#6840)
J109 (YS#5122)
D
DIP14
DIP8
TO-92
H
I
J
K
L
M
R167
1/4W
2K
.
R132
1/4W
1K0
R169
C9
MINI
MC33079P
1/4W
10U
16V
15K
.
U3:A
100V
22N
C2
R19
MC33079P
1/4W
R232
R21
2K49
.
1/4W
1/4W
U3:B
2K
20K0
.
MINI
330N
C52
63V
R75
1/4W
6K98
R55
.
1/4W
MC33079P
6K98
C33
C38
.
U2:D
4N7
250V
220N
63V
R63
R32
1/4W
6K98
1K0
.
MINI
POTENTIOMETERS AND KNOBS
MODEL(S):-
REF
FUNCTION
MPSA13 (YS#5105)
P1
GAIN
MPSA42 (YS#5113)
P3
LOW-MID
P4
TREBLE
P5
BASS
P6
HI-MID
P8
LOW EXPANDER
R
F
R
F
R
F
S G
E
B C
R
F
TO-92
R
F
R
F
MODEL(S):-
#
DATE
VER#
1
JAN-08-2013
V01
2
02-MAY-2013
.
3
.
.
4
13-MAY-2013 V02
5
09-JUL-2013
V03
6
11-SEP-2014
7
5-DEC-2014
V04
8
9
10
D
V
11
D
V
12
D
V
13
D
V
K
L
M
N
O
P
P8
INPUTS[M1]
M
4493
LOW EXPANDER
10K
5B LIN
R80
2K
.
R113
1/4W
20K0
MINI
MC33079P
U3:D
MC33079P
U3:C
M1505 - POTS LIST
SMALL BLOCK - SB112
PART#
KNOB
STYLE
4499
10020
P41
4494
10020
P41
4494
10020
P41
4494
10020
P41
4494
10020
P41
4493
10020
P41
P
K
N
P
K
N
P
K
N
P
K
N
P
K
N
P
K
N
M1505 DATABASE HISTORY
SMALL BLOCK - SB112
DESCRIPTION OF CHANGE
FIRST PRODUCTION RELEASE. - ML
Modified schematic to reflect rework done
on all V01 PCBs. - ML
PC8540: Rework on V01 included.
GG
PC8550: Routed auxiliary signal to headphones. - ML
PC8696: Replace R65 2K05 to 4K99 (YS 4639)
PC#8734:D2,D5 YS#6438(1N4007)added across the-
-output of 7815 and 7915 regulators.
PC#8738:C20,C22 changed from 33P to 100N YS#5212.
N
N
N
N
Product
SB112
TONE CONTROLS
PCB#
M1505
Sheet
Date:
Mon Dec 08, 2014
Rev:
V04
YsType: YsType
Filename:
M1505V04sch.sch2006
N
O
P
Q
1
2
3
4
5
6
7
8
9
10
2
of
3
11
Q
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