Roland Va-7 - CIRCUIT DIAGRAM (AMPLIFIER PCB ASSY)

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B
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37
11
VA-7
July, 2000
CIRCUIT DIAGRAM (AMPLIFIER PCB ASSY)
-12V
+12V
AGND
+5V
+5V
DGND
DGND
-12V
AGND
+5V
+5V
C2
100uF25
3
4
2
1
5
6
7
CN4
5045-07A
3
4
2
1
5
6
7
CN5
5045-07A
R75 0
C1
100uF25
VCC-VCC
GND
From SWITCHING
POWER SUPPLY
(Cn2)
+17V
To AUDIO BOARD (Cn10)
3
4
2
1
CN3
5045-04A
C47
4700uF25
R70
0
R71
0
R72
0
C3
4700uF25
VR
VS
2
1
3
Q1
BC560B
R7
10K
R8
22K
R9
22K
R10
220
12
D2
1N4148
2
1
3
Q2
BC549B
R5
4K7
R6
10K
C8
10uF16
R41
270
1/4W
VR
MUTE
ROUT
AGND
LOUT
AGND
MUTE
From AUDIO BOARD
Cn8
0=MUTE ON
1=MUTE OFF
TO EQ BOARD
3
4
2
1
5
6
CN2
5045-06A
C75
10uF16BP
C60
10uF16BP
+12V
-12V
LSEND
AGND
RSEND
LRET
RRET
R12
27K
VCC -VCC
C13
220nF
5%
P
G
N
D
6
IN2+
5
S
V
R
7
S
G
N
D
3
I
N
1
-
2
O
B
R
4
OUT2
8
V
S
9
S
B
1
1
OUT1
10
IN1+
1
IC6
TDA7350
1
1
2
2
3
3
4
4
5
5
6
6
7
7
CN6
B7B-XH-A
1
3
2
VR11
22K
R74 NIU
R73
NIU
C10
220uF25
C12
22uF25
C11
0.1C
VS
SPEAKERS
R40
1K
1/4W
+12V
DGND
DGND
4 OHM
4 OHM
RIGTH WOOFER
LEFT WOOFER
RIGHT TWEETER
LEFT TWEETER
4 OHM
SPR+
SPR-
SPL+
SPL-
4.7uF
4.7uF
R39
1K
1/4W
3
4
2
1
CN1
5045-04A
Coil=720Ohm
C42
22uF25
C43
220uF25
C44
0.1C
C9
220uF25
+
1
C
M
2
4
N
C
2
6
N
O
2
8
-
1
6
C
M
1
1
3
N
C
1
1
1
N
O
1
9
RL1
DS2YSDC12V
P
G
N
D
6
IN2+
5
S
V
R
7
S
G
N
D
3
I
N
1
-
2
O
B
R
4
OUT2
8
V
S
9
S
B
1
1
OUT1
10
IN1+
1
IC7
TDA7350
VS
1
2
D1
1N4002
Rig th
C35
0.1C
C36
0.1C
C37
0.1C
C38
0.1C
C39
0.1C
C14
220nF
5%
C41
220nF
5%
R76
27K
Left
C45
220nF
5%
1
3
2
VR12
22K
C46
220uF25
4 OHM
From SWITCHING
POWER SUPPLY (Cn2)
+
-
+
-