Block Diagram - Roland Va-3 Service Notes

1 2 3 4 5 6

BLOCK DIAGRAM

A
B
C
D
E
IC5 IC1
X1
16 M
4 M
20MHz
F
DRAM MASK ROM
A D A D
ADDRESS BUS
G
IC17
A
D
RAS RAS
UCAS CAS
4 M WA
WE EWE XP
H
D RAM
A EA
WD
ED
ED
XRST
IC11
I
XPGS4 X2
24.576MHz
BOARD
J
K
L
M
N
O
P
Q
R
S
T
U
7 8 9 10 11 12
IC2
XRST
SH-uC
TXD0
RXD0
A
D
DATA BUS
IC12 IC13
IC26;IC27;IC28;IC29
A A
D BEAM
128 M 32 M
WAVE ROM WAVE ROM
D D
AN3,5 RX0 TX0 RX1 TX1 AN4 WVOUT
TX2
RX2
TX1
RX1
SH-uC
AN6,7
XCS6
XCS4
A[0-21] D[0-15] XCS2
ADDRESS BUS
DATA BUS
CS BUS
XCS6
D[0-7] D[0-7]
D[0-15] D[0-15]
FDC DRAM
KEY MASK
ROM
SCAN
XTAL
A0,1 A0,1 A[1-21] A[1-12]
IC16 IC10 IC19 IC21
X2
16MHz
32Mbit 16Mbit
IC47
BUFF.
3.5"
FDD
KEYBOARD 61 KEYS
MODULATION
VA-3
13 14 15 16 17 18
D216;D215;Q16;IC10
D.BEAM
MUTE
IC5 MAIN BOARD
RESET
20MHz
AN 1,2
X1
XTAL MUTE
D[0-1]
AN3
PORT
CK
XRST
XRST
XPORT
XRAS
CAS PA8 SCSIRST
IC4 IC8
XRST
10MHz
20MHz
RAS,CAS XCE0,1 XCS4 XCS2 XECS
[0,2,4-9]
D[0-15] D[0-7]
SH GA
FLASH
XWP
XRP SS[0-3]
PD[0-7] LS[0-3]
A[1-20] A[0-5,19-21] LLCK XSSEN
IC20 IC3
16Mbit
IC1,IC2
LATCH
DRIVER
Q1-Q4
IC5
LED
MATRIX
SWITCH
MATRIX
BENDER
& IC5,IC6
IC3
CONTROL
ALPHA
VOLUME
DIAL
BOARD
14
19 20 21 22 23 24
LINE
OUTPUT
SUST/EXPR. MIDI
LCD
IN OUT
CONTRAST
4 5 4 5
1 3 1 3
IC3 Q7
PHOTO BUFFER
Q4,Q5,Q9
MUTE
SQUELCH
CNTRL
IC7
IC10
DATA
BUFFER LOUT
D/A
AMPL.
ROUT
IC11
-12V
OUT
INVERTER
XCS
XRES
OSC1
D[0-7]
PORT1
LCD
CNTR
A0
VD VA
IC11
CS
AN0,1,2
D A TOUCH
VIDEO
SCREEN
SRAM IC12 LOGIC
LCD
CONTRAST
LCD ADAPTER
LCD
TOUCH SCREEN
1/4 VGA
INVERTER
INVERTER BOARD
Jan, 2001
25 26 27 28 29 30
LINE
INPUT
INPUT REG.
IC18
Q2,Q3
AMPL.
IC14
LPF
+5V
IC6, IC5
IC9
IC2
IN
+5V +12V VPWR
POWER
JK1
+
1 1 2
-
2
SUPPLY
POWER SWITCH
3
DC IN
12V 2A
IC2
R+
POWER
R-
L+
AMPLIFIER
L-
POWER SUPPLY
&
POWER AMPLIFIER
8
7
3
2
4
5
1
PHONES
BOARD
8
7
3
2
4
5
1