Circuit Diagram (Left Control Pcb Assy) - Roland A-37 Owner's Manual

Sept, 2001
1 2 3 4 5 6

CIRCUIT DIAGRAM (LEFT CONTROL PCB ASSY)

A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
5VREF
R
S
T
U
7 8 9 10 11 12
TO RIGHT CONTROL BOARD
(CN1)
1 14
CL3 SSD3
2 13
DRW7 SSD2
3 12
DRW6 SSD1
4 11
Y5 SSD0
5 10
Y4
6 9 YY3
7 8
CN1
14 WIRE CABLE P1.27
D
SW1 SW2 SW3
LOWER UPPER SPLIT
SSD0
SW5 SW6 SW7
DATA PROGRAM A/B
CHANGE
SSD1
SW9 SW10 SW11
2 3 4
SSD2
SW13 SW14 SW15
6 7 8
SSD3
D13 D14 D15
FROM CPU BOARD
(CN2)
1 16
LLD0 2 15
LLD2 3 14
LLD4 4 13
LLD6 5 12
SC0 6 11
SC2
7 10
8 9
CN2
FROM CPU BOARD
5VREF +5VD
(CN3)
SSD0
1 14
SSD1
2 13
SSD2
3 12
SSD3 C2
4 11
MOD 47uF16
5 10
BEND
6 9
DATA
7 8
VR1
D
POT. SLIDER 100KB 10MS
CN3 C3
47uF16
5VREF REF
2 DATA
CN4
R10 5VREF 53015_0 610
10K
6 YEL
5 RED
BEND 4 ORG
REF 3 BRW N TO MOD-BENDER UNIT
MOD BLEU
2
GRN
1
REF
C4 C5
100nF 100nF
D
13 14 15 16 17 18
R1
RW0
220I
R2
RW1
220I
R3
RW2
220I
R4
RW3
220I
SW4
CONTROL
R5
RW4
220I
SW8
1
R6
RW5
SW12
220I
5
R7
RW6
220I
R8
RW7
D16 220I
SC0
SC1
SC2
SC3
LLD1
LLD3
LLD5
LLD7 LLD0 1 18 RW0
I0 O0
SC1 LLD1 2 17 RW1
I1 O1
SC3 LLD2 RW2
3 16
I2 O2
LLD3 RW3 R9
4 15
I3 O3
LLD4 RW4
5 14
I4 O4
LLD5 RW5 NIU
6 13
I5 O5
LLD6 RW6
7 12
I6 O6
LLD7 RW7
D 8 11
I7 O7
IC3
TD62583AP
D
ALL SWITCHES ARE: EVQPAE05R
ALL LEDS ARE: 5L53SRDD_RED
19 20 21 22 23 24
DRW0
D1
2 1
D2
LOWER
2 1
DRW1
D3
2 1
UPPER
D4
2 1
DRW2 DISPLAY 3X7 SEGMENTS
D5
2 1
DRW0 25
a1
D6
SPLIT DRW1 24
b1
2 1 DRW2 4
c1
DRW3 2
d1
DRW4 1
e1
DRW3 DRW5
27
f1
DRW6
28
g1
D7
DRW7
5
DP1
2 1
DRW0
21
a2
D8
CONTROL DRW1
20
b2
DRW2
2 1 8
c2 A1a
DRW3
7
d2 A2
DRW4 DRW4
6
e2 A3
DRW5
23
D9 f2 A1b
DRW6
22
g2
DRW7
2 1 9
DP2
D10
DATA DRW0
16
a3
DRW1
2 1 15
b3
DRW2
13
c3
DRW5 DRW3
11
d3
DRW4
10
D11 e3
DRW5
17
f3
DRW6
2 1 12
g3
PROGRAM DRW7
14
D12 DP3
CHANGE
2 1
DS1
DRW6 LB603VF
DRW7
CL3
+5VD
1
Q1
3
RN2227
2
IC2
74HC138P
1 15 Y0 Y0 1
A Y0
2 14 Y1 Y1 3 Q2
B Y1
3 13 Y2 Y2 2 RN2227
C Y2
12 Y3 Y3
Y3
11 Y4
Y4
6 10 Y5
G1 Y5
4 9
G2A Y6
5 7
G2B Y7
1
3 Q3
D
2 RN2227
+5VD
1
Q4
3
RN2227
2
C1
D
100nF
A-37
25 26 27 28 29 30
3
19
18
26
CL0
CL1
CL2
CL3
13