Roland V-Accordion FR-8x Service Notes page 71

CIRCUIT BOARD
CIRCUIT DIAGRAM (CHIN SWITCHES)
CN1
53254-0510
BR7
1
T0
2
T1
3
T2
4
5
D
To
POWER AMP B.
(CN78)
CIRCUIT BOARD
CIRCUIT DIAGRAM (EFX)
+Vcc
CN1
S9B-PH-K-S
9
8
To
7
6
Jack B.
5
4
3
(CN12)
2
1
IC1C
UPC4570G2-E2-A
ASSY 7783602000
SW1
SKEYACA010
ASSY 7783606000
View from component side
-Vcc
D
R3 C3 R4
4
NIU 100pF 100
C2 C2 C1
2
10uF
0.1uF 0.1uF
REF
R9 R13
100 560K
3
1
2 REF
IC1A
UPC4570G2-E2-A
+Vcc
C8 C8 C9
0.1uF 0.1uF 0.1uF
C10
10uF
- - - -
+ + + +
D D D
C15
10uF
-Vcc
C12 IC2C C13
0.1uF UPC4570G2-E2-A 0.1uF
(CHIN SWITCHES)
View from component side
D1 D2
1N4148 1N4148
SW2
SKEYACA010
(EFX)
VR1 VR2
10K R5 C4 R1 10K R6
5 4 5
NIU 100pF 100 NIU
2
6 6
D D
R10
100 R14 R11
560K 100
5
7 1
6 REF
IC1B
UPC4570G2-E2-A
C7
0.1uF
C11
0.1uF
C14
0.1uF
C16
0.1uF
D REF
D3
1N4148
SW3
SKEYACA010
VR4 VR4
10K 10K
VR3
C5 R2 10K R7 C6 R8
4 5 4 5
100pF 100 NIU 100pF 100
2 2
6 6
D
R12
R15 100 R16
560K 560K
3 5
7
2 REF 6 REF
IC2A IC2B
UPC4570G2-E2-A UPC4570G2-E2-A
FR-8X/XD
D
95