Roland A-33

A-33
CIRCUIT
DIAGRAM C
CRU BOARD
OUT-I- OUTB MIDI OUT-I-MIDI OUTB
0 OFF
OFF
O
-1
OFF
ON
-1
0
ON
OFF
-1
ON
ON
L^=L2=L3=L'?=SBTO"IGDW
ICS
]
R-ie
8
y-^\y\y
NC
LR
VCC
EN
7
G
-l<S
NC
BND
5
~l
0
-IS
MUXO
1
BO
RWO
MUX1 B
-19
RW1
MUX
2*
3
-18
RWB
KO
-17
RW3
5
1B
BOP
KB
6
-IS
MUX3
K3
7 -I4
VRH 8
-I3
VRL
MOD 9
-IB
DRTR
BEND
-10
-I -I
CN'l
RMPCI S7''I6P
MKO
-1
-18
TO
BRO B
-15
T-l
MK-1
3
-14
TB
BR-I
4
-13
T3
MKB
5
-IB
T4
BRB
8
.
-l-I
IS
MK3
7
^
0
-10
TG
BR3
8 9 T7
UT1
YKRE-l-SOB^
JO
IC2B
A<p
74LSOS
FLRT
ICBC
IC7R
V
7-^HCDB
FLRT
IC7B V
74HC08
FLRT
ICBR
I
74LS0B'
FLRT
to control
pcb
X
RD-I
3
X
RDB
4
X
RD3
S
X
RD4
6
X
RDS
7
X
RDG
8
X
RD7
9
RBI
BXtOKS
to
keyboard
pcb
CNB
RMPC'1B7B0P
UT2
THRU
Y<FSt_^054
L1
SBTQ460
74LS05
f^LRT
QB
R'lB
*
4<7S
“
ICBE
74LSQ5
FLRT
B CS
3 fiS
RXW
5 E
6 TXD
7
RXD
8
IRQ
9
XIRQ
MK4
-1
SO TO
BR4
B
rv
-IS
T-l
MK5
3
O
-18
TB
BR5
4 -IX
T3
MKG
5
-IB
T4
BRG
G
-lb
T5
MK7
7
'14
TG
BR7
8
-13
T7
MK8
9
-IB
MK9
BRB
-10
-I-l
BR9
RR6
BXtOKS
VCC
RR5
f
aX-IOKS
V G
D
N
D
D
5
4BB
5
943
CBStOuF^S
IC4
68HC11E30FP
74LS05
FLRT
0^
BSCB4'IB
CNB
CQNN_6X1
E
"InF
C-IB
l
ciB^ 5%
'luF'16
-luF-lB
To
JRC< Pcb
3 K-l
64
4
KB
63
5 R9 6B
6 BOP 59
7 XRES
58
8
R8 57
9
K3
56
PED
13
MOD
15
DRTR 17
BEND
19
BTCK
14
EXPJ
16
PEG
18
SEL
BO
CS 54
RS
53
RXW
5B
E
51
TXD
50
RXD
47
666
PCO
— IKU
_
XIRQ
RES
36
RD1
37
RDB
38 RDS
39 RD4
40 RDB
41
RDG
4B
RD7
IB
MUXO X
11
MUX1 X
10
MUXB
X
9 CSPO X
8 RWO X
7
RW1 X
6 RWB X
5 RW3 X
B8
B9
30
B7
MOOR
25
MODS
BB
VRH
.
31
T
\ RDO
3
\ RD1
4
\ RDB
7
\ RD3 8
\
RD4
13
\ RDS
14
\ RDG
17
\ RD7
18
CSPO
11
XRES
—
Ic
IC5
SSC-IOOC
R'15B33^B4
to
keyboard pcb
B OUT1
5
OUTB
6 MUX3
9
rrr'
-IS
HH
-IS
HR
-16
HH
-19
Hrg-
CLKVCC
CLR
ICG
74HCS73
FLRT
.
.
VCC
^
EXCCL453BU^
EXCCL4G3BU-1
EXCCL453BU-I
R4 VCC
10KS
|C5
7
-ibuF-lG
VRL
IC-1
M51953R
Is.
1
4
MK9
3
BR9
B
MK9
1 BR8
18 T7
X
15
TS.
X
14 T5
X
13
T4
X
11
T3 X
10
TB
X
9
T1
X
8 TO
X
80
MK7
79 BR7
78 MKG
77
BRG
75 MK5
74
BRG
73
M<4
72 BR4
71
MK3
70
BR3
68 MKB
67 BRB
GG MK1
65
BR1
64
MKO
63
BRO
RRB
8X-IBKS
RR3
8X15<S
VCC
CN4
C0NN_6X1
VCC RES
NC
BND CRP
From Power Supply Pcb
C-I8
-lOOnF 5X
C-IO
-
TPB
BBpF^
^
npO
8MHz
,10MS
—
C11
~
BBpFS
’
npO
8MHz
-lOMS
-
C4
“
BBpFS
npO
CN5
RMPC1
B7-I6P
CN6
RMPC-I B71SP
CB3
-lOOuF-IG
IC70
V
74HC08
FLRT
IC7C
V,
74HC08
FLRT
PIN1
KQ
1
o
o
o o
IB nc
PINB PIN17 DRTR 1
O
O
0 0
16
PEG
PINS
nc
P 15 nc PIN4
PIN19 BEND
B
15 SEL
PINS
RW3
3 14 RWB PING
PINB1 VRL
3
14 VRH
PIN7
RW1
4
13
RWO
PINS PINB3 GND
4 13
GND
PINS
CSPO
5
IB
MUXB
PIN10 PINBS
MODB b
/V
/>
IB
nc
PIN11 MUX1
R
o
o
11
MUXO
PIN1B PINB7
MODR 6
11
PIN13 PED
7
o
0
10 BTCK PIN14 PINB9
7
X'
n
10
P1N15 MOD
8
o
o
9 EXPJ
PIN16
PIN31
EXTRL
a 9 nc
0 0
CN7
RMPC-I B7-18P
PIN33
XTRL
1
o
o
16 RDO
PIN35
nc
B
15
RD1
PIN37 RD2
3
o o
14 RD3
PIN
39
RD4
4 13 RDS
PIN41 RDG
5
IB RD7
PIN43 RES 6
O
0
11 nc
PIN45 XIRQ
7
10 IRQ
PIN47
RXD 8
o
0
9 nc
PIN34 PIN49 GND
1
PIN36 PIN51 E
B
PIN38 PIN53 flS
3
PIN40 PIN55 VDD
4
PIN4B PIN57
RS
5
PIN44
PINS9
BOP
6
PIN46
PING1
nc
7
PIN48
PINGS KB
8