Roland Va-7 - MIDI PCB ASSY & CIRCUIT DIAGRAM

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38
11
VA-7
July, 2000
MIDI PCB ASSY & CIRCUIT DIAGRAM
ASSY 7770105000
View from component side
FOOT SWITCH
SUSTAIN SWITCH
EXPRESSION PEDAL
VLCD
IN
OUT
THRU
EXPJ
VLCD
M_INA
M_OUTA
XRST
L10=L11=L12=SBT0160W
XRST
+5V
+5V
DGND
DGND
-VCC-VCC
EXPJEXPJ
GNDREFGNDREF
REF+5REF+5
SCD7 SCD7
SCD6 SCD6
LSSC13LSSC13
IPCTXD1
IPCRXD1
IPCTXD2
IPCRXD2
MIDI
5VC
5VC
5VC
5VC
5VC
5VC
5VC
5VC
5VC
5VC
R10
1K
Q1
BC549B
2
1
3
R11
22K
R12
1K
Q3
BC549B
2
1
3
R13
22K
L5
SBT0160W
1
2
4
3
L7
SBT0160W
1
2
4
3
TP
TP1
TP
TP2
TP
TP3
FIX1
FIX2
FIX3
R31
1K8
R32
470K
C11
1nF
C12
1nF
R34 220
R35 220
R36 220
R37 220
R38 220
R39
4K7
R40
4K7
R41
22K
R42
22K
IC6
6N137
1
2
3
4 5
6
7
8
NC
LA
LC
NC GND
OUT
EN
VCC
JK5
YKF51_5046
2
1
3
4
5
6
7
8
9
Q9
BC560B
2
1
3
L9
1
2
4
3
L10
1
2
4
3
L11
1
2
4
3
R43
1K
L12
SBT0460
C13
0.1C
C14
0.1C
C15
0.1C
FIX4
R54
22K
CN1
5045-09A
3
4
5
6
7
8
2
1
9
C1
100uF16
CN2
5045-08A
3
4
5
6
7
8
2
1
D7
1N4148
1
2
D1
1N4148
1
2
D2
1N4148
1
2
D3
1N4148
1
2
D4
1N4148
1 2
JK2
HLJ0520_01_110
3
1
2
JK3
HLJ0520_01_110
3
1
2
JK4
HLJ_0520_01_010
3
2
1
FIX5
L6
SBT0460
IC5A
74LS05
12
14
7
IC5B
74LS05
34
IC5C
74LS05
56
IC5F
74LS05
1312
IC5D
74LS05
98
IC5E
74LS05
1110
From CN10 on MAIN B.
From CN6 on MAIN B.