7-2
7-2
CIRCUIT DIAGRAM - AMPLIFIER BOARD
1
2
3
4
5
6
7
8
N
I
P
N
I
N
D
N
G
A
S
B
N
E
P
P
V
W
S
D
N
G
P
0
0
5
C
I
0
2
7
9
P
M
5
1
5
C
4
0
1
8
0
5
R
K
0
0
1
7
0
5
R
K
0
0
1
0
0
5
L
H
U
1
0
0
5
D
Z
2
V
6
2
0
5
R
K
0
1
1
1
5
C
P
2
2
5
3
5
C
C
5
0
1
V
0
5
/
U
0
0
0
1
1
2
3
4
1
0
5
K
J
H
C
2
_
P
S
_
K
J
72
5
R
K
1
1
0
5
R
K
0
1
1
2
3
4
5
6
7
8
N
I
P
N
I
N
D
N
G
A
S
B
N
E
P
P
V
W
S
D
N
G
P
1
0
5
C
I
0
2
7
9
P
M
6
1
5
C
4
0
1
0
1
5
R
K
0
0
1
9
0
5
R
K
0
0
1
1
0
5
L
H
U
1
1
0
5
D
Z
2
V
6
4
0
5
R
K
0
1
3
1
5
C
P
2
2
6
3
5
C
C
5
0
1
V
0
5
/
U
0
0
0
1
3
0
5
R
K
0
1
82
5
R
K
1
1
2
3
4
5
6
7
8
N
I
P
N
I
N
D
N
G
A
S
B
N
E
P
P
V
W
S
D
N
G
P
2
0
5
C
I
0
2
7
9
P
M
2
0
5
D
Z
2
V
6
5
0
5
R
K
0
1
6
1
5
R
K
2
8
2
1
5
C
P
2
2
1
2
3
4
5
6
7
8
N
I
P
N
I
N
D
N
G
A
S
B
N
E
P
P
V
W
S
D
N
G
P
3
0
5
C
I
0
2
7
9
P
M
3
0
5
D
Z
2
V
6
6
0
5
R
K
0
1
8
1
5
R
K
2
8
4
1
5
C
P
2
2
1
5
5
C
U
7
.
4
E
T
U
M
E
T
U
M
E
T
U
M
E
T
U
M
0
0
5
N
C
m
h
o
4
K
P
S
T
U
O
L
m
h
o
4
K
P
S
T
U
O
R
m
h
o
8
K
P
S
B
U
S
V
5
.
5
+
0
0
5
B
R
5
2
/
8
B
R
R
E
W
O
P
W
S
O
T
7
4
5
C
4
0
1
0
5
5
C
4
0
1
0
0
5
Q
5
4
9
C
S
2
E
T
U
M
V
5
.
3
2
+
V
5
.
5
+
V
5
.
3
2
+
4
4
5
C
P
0
9
3
3
4
5
C
P
0
9
3
5
4
5
C
P
0
9
3
6
4
5
C
P
0
9
3
8
4
5
C
4
0
1
2
0
5
C
2
6
5
3
0
5
C
2
6
5
7
2
5
C
4
7
4
M
8
2
5
C
4
7
4
M
1
2
3
4
5
6
7
8
9
01
11
0
0
5
K
J
N
I
D
_
K
J
0
1
5
C
5
7
4
9
0
5
C
5
7
4
4
3
5
C
4
0
1
3
3
5
C
4
0
1
2
3
5
C
4
0
1
1
3
5
C
4
0
1
6
0
5
C
5
7
4
7
0
5
C
5
7
4
9
4
5
C
4
0
1
8
1
5
C
4
7
4
7
1
5
C
4
7
4
0
0
5
D
8
4
1
4
N
1
2
0
5
D
8
4
1
4
N
1
N
I
R
N
I
L
N
I
S
N
I
E
T
U
M
+
B
U
S
-
B
U
S
7
3
5
C
2
0
1
9
3
5
C
2
0
1
0
4
5
C
2
0
1
8
3
5
C
2
0
1
3
2
5
C
V
5
3
/
U
0
0
1
4
2
5
C
V
5
3
/
U
0
0
1
5
2
5
C
V
5
3
/
U
0
0
1
6
2
5
C
V
5
3
/
U
0
0
1
8
0
5
C
5
7
4
2
4
5
C
P
2
1
4
5
C
P
2
6
3
5
R
9
K
3
7
3
5
R
0
0
1
5
3
5
R
K
2
3
3
5
R
K
0
0
1
4
0
5
L
ST
5.8
_
H
U0
1_
L
5
0
5
L
ST
5.8
_
H
U0
1_
L
2
0
5
L
S
T
5
.
2
1
_
H
U
0
1
_
L
3
0
5
L
S
T
5
.
2
1
_
H
U
0
1
_
L
1
0
5
D
8
4
1
4
N
1
4
3
5
R
K
2
V
5
.
3
2
+
N
I
_
L
T
U
O
R
T
U
O
_
R
N
I
_
R
T
U
O
L
T
U
O
_
L
0
0
5
C
5
0
1
1
0
5
C
5
0
1
9
1
5
R
0
1
0
2
5
R
0
1
1
2
5
R
0
1
2
2
5
R
0
1
4
2
5
R
0
1
3
2
5
R
0
1
5
2
5
R
0
1
6
2
5
R
0
1
4
0
5
D
Z
V
0
4
5
0
5
D
Z
V
0
4
6
0
5
D
Z
V
0
4
7
0
5
D
Z
V
0
4
5
0
5
C
2
7
2
4
0
5
C
2
7
2
9
2
5
C
4
2
2
M
0
3
5
C
4
2
2
M
2
5
5
C
4
7
4
C
M
4
1
5
R
0
0
1
3
1
5
R
0
0
1
2
1
5
R
0
0
1
1
1
5
R
0
0
1
1
3
5
R
8
K
6
2
3
5
R
8
K
6
7
1
5
R
K
3
4
5
1
5
R
K
3
4
1
4
5
R
N
E
P
O
4
0
5
D
N
E
P
O
3
0
5
D
N
E
P
O
3
4
5
R
N
E
P
O
2
4
5
R
N
E
P
O
v
5
.
3
2
+
v
5
.
3
2
+
8
3
5
R
K
2
2
9
3
5
R
K
2
2
0
4
5
R
K
2
2
9
2
5
R
K
0
1
0
3
5
R
K
0
0
1
91
5
C
4
0
1
02
5
C
4
0
1
12
5
C
4
0
1
22
5
C
4
0
1
A
B
C
D
A
B
C
D
1
2
3
4
5
6
1
2
3
4
5
6
C500
B3
C541
C4
R511
B3
C501
B3
C542
D4
R512
B3
C502
A3
C543
C5
R513
C3
C503
B3
C544
B5
R514
D3
C504
C3
C545
C5
R515
A4
C505
D3
C546
D5
R516
C4
C506
A4
C547
D1
R517
B4
C507
B4
C548
C1
R518
D4
C508
D2
C549
C2
R519
B5
C509
C4
C550
D1
R520
C5
C510
D4
C551
C2
R521
C5
C511
A4
C552
C5
R522
D5
C512
C4
CN500
B6
R523
B5
C513
B4
D500
D3
R524
B5
C514
C4
D501
C4
R526
D5
C515
A4
D502
D3
R527
B5
C516
B4
D503
B4
R529
C1
C517
B4
D504
C4
R530
C1
C518
B4
IC500
A4
R531
C3
C519
A4
IC501
B4
R532
D2
C520
B4
IC502
C4
R533
D3
C521
C4
IC503
D4
R534
C4
C522
D4
JK500
A1
R535
D4
C523
A5
JK501
C6
R536
D3
C524
B5
L500
A4
R537
D3
C525
C4
L501
B4
R538
B3
C526
D4
L502
B5
R539
B3
C527
B5
L503
B5
R540
C2
C528
C5
L504
C5
R541
C2
C529
C5
L505
D5
R542
B4
C530
D5
Q500
C1
R543
C4
C531
B5
R501
B3
RB500
D1
C532
C5
R502
B5
ZD500
B4
C533
C5
R503
B3
ZD501
C4
C534
D5
R504
C5
ZD502
C4
C535
B5
R505
C5
ZD503
D4
C536
B5
R506
D5
ZD504
B4
C537
B5
R507
A3
ZD505
C4
C538
C5
R508
A4
ZD506
C4
C539
C5
R509
B3
ZD507
D4
C540
D5
R510
B4
For
MCD
129
only