D-Beam Pcb Assy & Circuit Diagram; Ribbon Pcb Assy & Circuit Diagram; Inverter Pcb Assy & Circuit Diagram - Roland Va-7 Service Notes

C47
5V
0.1C
PULSE:
FREQUENCY:6.84KHz
DUTY:12.5%
C48
PULSE WIDTH:18.3uS
R75
10uF16
22
5V
D216
Q17
TLN201
2SC1815GR
2
C46
PULSE
3
150pF
1
3
R70
10K
R71
100
R72
R74 1.8
100
CN15
12V -12V 5V
53014-0710
1
2
3
4
5
6
BEAM
7
From CN21 on MAIN B.
R17
CN1
5597-08APB
820
8
7
6 R20
5 1K
4
3
2
1
TO RIBBON
R24
D3
BZW04-5V8B
820
D
C1
CN1
100nFC
5045-04A
4
3
From Power Supply
2
Cn5
1
12V
R77
3K3
C43
R76 1uF25
22 R79 R80
1K 10K
D215
TPS708
7
8
6
2
Q16
C49
2SC2235Y
1 R78 IC10B
10nF
100K UPC4570HA
5%
R81
1M
R73
1.8
C44
10uF16
BEAM
RIBB
REF5V
CN2
53014-0410
R19
1
10K
R21 2
NIU
100K 3
4
To CN3 on POTENTIOM. B.
C8
R22
1uF16 10K
REF
C1
100nFC
MOD1
CXA-K10A-L
JP1
1 3
DC-IN AC-OUT1
4
AC-OUT2
JP2
2 5
DC-GND AC-GND
C2
470uF16
3
2
4
IC10A
UPC4570HA
12V -12V
C45
10uF16
C50 C51
0.1C
0.1C
CN2
S2(4-2.3)B-XH-A
1
2
To LCD