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1
2
3
A
B
CHANGE HISTORY
#
DATE
VER#
PC#
DESCRIPTION OF CHANGE
1
2018-10-30
V01
9145
New SMT version from the amp and PS sections of M1555
2
2019-01-12
V01
9334
Replace R52 from 10k0 to 4k7 YS#7860
C
3
.
.
.
Replace C156 from 82n to 180N YS#5230
4
2019-SEP-24
V02
.
Improvements made for production
5
2022-JUN-02
.
9809
Replace Q14 and Q15 with YS#2511 IRGP20B60PDPBF
6
.
.
9830
Update assembly notes to add goop on both sides of silpad 3884
7
.
.
.
.
8
.
.
.
.
D
9
.
.
.
.
10
.
.
.
.
11
.
.
.
.
12
.
.
.
.
13
.
.
.
.
E
F
G
H
I
J
THIS SHEET CONTAINS A CHANGE HISTORY LOG, A LIST OF THE POTS & KNOBS AND A LEADS & PINS REFERENCE SECTION.
K
1
2
3
4
5
6
7
DESIGN HISTORY AND INFORMATION
4
5
6
7
8
9
10
11
LEADS AND PINS REFERENCE
LM7815 (YS#6872)
LM7915 (YS#6871)
TO-220
TO-220
I
G
O
G
I
O
8
9
10
11
12
13
14
FOD816 (YS#2306)
1
4
2
3
IRS21844 (YS#6586)
MJE340 (YS#6873)
1
IN
NC
14
2
SD
VB
13
3
VSS
HO
12
TO-126
4
DT
VS
11
5
COM
NC
10
LO
NC
6
9
7
VCC
NC
8
C B
E
IRFP140N (YS#6931)
IRFP9140N (YS#6932)
IRGP20B60PD (YS#2373)
BDX54C (YS#6911)
BDX53C (YS#6912)
TO-247AC
TO-247AC
TO-221D
B
C
E
G
D
S
G
C
E
12
13
14
15
16
17
A
B
C
D
E
F
NE5532N (YS#6884)
MC33078 (YS#6840)
TL072 (YS#6882)
1
+V
8
A
2
7
B
G
3
6
MC33079 (YS#6804)
4
-V
5
1
14
1
4
2
13
LM311 (YS#6640)
3
12
4
+V
-V
1
GND
+V
11
8
5
2
10
7
H
BS
6
9
3
6
2
3
7
4
-V
B
8
5
I
J
K
15
16
17
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