Potentiometer Pcb Assy & Circuit Diagram; Lcd Control Pcb Assy & Circuit Diagram - Roland Va-7 Service Notes

R9 2SC1815GR Q3
3 Q2 3
2SC1815GR
CN6 R10
5K6
5VC
R11 5K6 R12
B7B-PH-K- S
2K7
TOUCH3
1 2K7
2 TOUCH2
5VC 5VC
3
TOUCH0 R14
4
R15
5 TOUCHY
TOUCH1
6
2K7
TOUCHX R16 R17
7 2K7
3 3
Q4
2SA1015GR
To CN24 on Main Board
5K6 5K6
2 6
1 7
IC2C 3 5
-
UPC4570C
IC2A
UPC4570C
IC2B
UPC4570C
C9 C10
R18
+12V -12V
1nF
1nF
100K
C8
C7
47uF3 5
47uF3 5
From CN27 on MAIN BOARD
CN2
+12V 53014 -1310
YD
1
L P
1 2
2 3 XSLC
DISPON
3 4
XD0
5
R13 6 XD1
CN5
CN7
XD2
0 7
53014 -0310
XD3
52043 -0410 8
9
YU 4 -12V 10
XR
3 11
YL 2 12
XL 1 13
Q5 To Touch Screen
From CN23 on MAIN BOARD
2SA101 5GR
TP1
R1
5VC
220mOHM I D1
L1
SFPB-5 6
1W RCH-875-151K
1 2
R2
R5
1Ks
180
1%
R19
1/4W
100K
R6
IC1 18Ks
8 1 1%
CD CS
7 2
SI ES
6 3
V+ CT
4 5
GND INV
C4
NJM23 60M
100uF 16
FLAT
R8
1Ks
1%
C5
C6
NIU
560pFs
5% np 0
1
2
3
4
TO graphic L CD
5
6
7
8
9
10
5VC 11
RANGE +19.5V - +24.9 V
12
OPTIMAL VALUE AROUND +20.7V
C1
CN1
47uF3 5
00621 6012100808
R21
2K2I
CN4
+25.5V 0.6W
53014 -0310
2 1
3 2
R20 1 3
Q1
C2 2K2I
2SC1815G R
100uF 50
0.6W From CN3 on FC-7 BOARD
1
C3 2
47uF3 5
To THERM. BOARD