Phones Pcb Assy & Circuit Diagram; Switch D-Beam Pcb Assy& Circuit Diagram; Volume Pcb Assy & Circuit Diagram - Roland Va-3 Service Notes

1 2 3 4 5 6
A PHONES PCB ASSY & CIRCUIT DIAGRAM
ASSY 7770707000
B
C
D
E
F
G
H
SWITCH D-BEAM PCB ASSY& CIRCUIT DIAGRAM
ASSY 7770705000
I
J
K
L
M
N
O
VOLUME PCB ASSY & CIRCUIT DIAGRAM
ASSY 7770706000
P
Q
R
S
T
U
7 8 9 10 11 12 13
View from component side
View from component side
View from component side
VA-3
14 15 16 17 18 19
SEND R
RETURN R
PHONE_R
PHONE_L
RETURN L
SEND L
AGND
FROM POW.AMP. BOARD
53015-0410
TO CONTROL BOARD
(CN2)
CN5
53015-0610
1
A.GND
2
RETURN R
3
RETURN L
4
SEND L
5
SEND R
6
A.GND
TO JACK BOARD
(CN1)
30
20 21 22 23 24 25
CN1
53014_0710
L1=L2=L3=L4=L5=L6=BLO3RN2-R62T2
1
2
3
4
R1
L1
5
6
33I
7
R2
L2
(CN4)
33I
C1
R3
L4
100nFC
33I
C2
100nFC
R4 L5
33I
D105
2 1
DBEAM
ON/OFF
CN1
LED_A
1
LED_K
2
LSSC1
3 SW24
SCD7
4
DBEAM
ON/OFF
VR1A
1 3
RK14K1230
VR1B
VOLUME
4 6
A
C1
100nFc
A
Jan, 2001
26 27 28 29 30
JK1
YKB21_5006
8
7
3
2
4
5
1
L3
JK2
YKB21_5006
8
7
3
2
4
5
1
L6
D27
TOP WIEV
MIN MAX
4 1 2 5 3 6 n