Roland Va-3 - Control PCB Assemblies and Diagrams; Control PCB Assembly (D-Beam) & Diagram; Control PCB Assembly

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26
11
VA-3
Jan, 2001
CONTROL PCB ASSY ASSY 7770704001
View from component side
CONTROL PCB ASSY F/ D-BEAM & CIRCUIT DIAGRAM
ASSY 7700609000
View from component side
PULSE:
DUTY:12.5%
FREQUENCY:6.84KHz
PULSE WIDTH:18.3uS
PULSE
BEAM BEAM
-12V
12V -12V 5V
5V
12V
12V
D215
TPS708
1 2
CN15
53014-0710
3
4
2
1
5
6
7
R70
10K
C46
150pF
R71
100
R72
1.8
R73
1.8
R74
100
R75
22
R76
22
Q16
2SC2235Y
3
1
2
Q17
2SC1815GR
3
1
2
R78
100K
R79
1K
R80
10K
R81
1M
C49
10nF
5%
C50
0.1C
C51
0.1C
D216
TLN201
21
R77
3K3
C43
1uF25
IC10B
UPC4570HA
7
6
8
IC10A
UPC4570HA
3
4
2
1 5
9
C47
0.1C
C48
1000uF16
C44
10uF16
C45
10uF16
From CN21 on MAIN B.
5V
R82
10I