Block Diagram - Roland Va-7 Service Notes

+5V +12V -12V
IN
AUDIO OUT
4
1
XPGS-6
PHOTO
TX1 RX1 TX2 RX2
AFTER TOUCH
IC1
BUFFER
ZIP
IDE
RX2 TX2 RX3 TX3 AN3,5 RX1 TX1
D[0-15] D[0-7]
IDE
SUBCPU
AN0,6,7
INTERFACE
A[0-3] XIDE A[0-7] A[0-21] D[0-15]
IC17 IC13
D[0-7] D[0-7]
KEY
FDC
SCAN
XTAL
A0,1 A0,1
IC16 IC10
X2
16MHz
AFTER TOUCH
3.5"
KEYBOARD
FDD
61TP9/AT
MIDI PEDALS
FOOT FOOT SUSTAIN
OUT THRU PEDAL SWITCH SWITCH
5 4 5 4 5
3 1 3 1 3
IC6 IC5
BUFFER BUFFER
MIDI BOARD
D.BEAM
MAIN BOARD
IC26;IC27;IC28;IC29 IC5
RESET
D BEAM
20MHz
AN4 WVOUT
RX0 TX0 AN 1,2 XTAL
X1
PB[3-7]
SH-uC
CK
XRST
XCS6 XRAS
XCS4 CAS
XCS2 PA8
IC4
ADDRESS BUS
DATA BUS
CS BUS
XCS6 RAS,CAS XCE0,1 XCS4 XCS2
D[0-15] D[0-15] D[0-15] D[0-7]
DRAM
MASK
FLASH
ROM
XWP
XRP
A[1-21] A[1-12] A[1-20] A[0-5,19-21]
IC19 IC21 IC20 IC3
64Mbit 16Mbit 16Mbit
IC9
IC1,IC2
BUFF.
LATCH
DRIVER
IC7
BUFF.
LED
MATRIX
IC7
BUFF.
SWITCH
MATRIX
PART-BAL
VR3
4 5
BENDER
1 3
& 6 7
RIBBON
MODULATION
FC7-PEDAL
+5V +12V -12V
VARIPHRASE
BOARD
AUDIO IN
AUDIO OUT
D216;D215;Q16;IC10
AUDIO IN2
IC5 IC3
AUDIO IN1
MUTE
D[0-1]
AUDIO BOARD
PORT
XRST
XPORT
SCSIRST
IC8
XRST
10MHz
20MHz
XECS XCS
[0,2,4-9] XRES
OSC1
D[0-7]
PORT1
LCD
SH GA
CNTR
SS[0-3] A0
PD[0-7] LS[0-3]
LLCK XSSEN VD VA
IC11
CS
AN0,1,2
D A TOUCH
VIDEO
SCREEN
SRAM IC12 LOGIC
LCD
CONTRAST
LCD ADAPTER
Q1-Q11 IC3,IC4
TOUCH SCREEN
LCD
1/4 VGA
IC10;IC11;IC12;IC13
IC5,IC6
DEBOUNCE ALPHA DIAL
CONTROL BOARD
INVERTER
INVERTER BOARD
AMPLIFIER BOARD
IC1,IC2
AMP L
RELAY
EQU
IC6
R
AMP
Q1,Q2
RELAY
DRIVER
MASTER
VOLUME
8
7
3
2
4
5
1
IC12,IC13,Q3
8
7
MUTE 3
2
IC4
4
5
1
2
LPF
3
L/M
1
IC9 IC1 RELAY OUTPUT
2
LPF 3
1 R
RL1
2
3
1 L/M
INPUT
2
3
1 R
MIKE
2
3
1
INPUT
+17V POWER AMP
AC INLET
+5V FLOPPY
SWM-80
SWITCHING
+5V LCD
POWER SWITCH
+12V ANG POWER SUPPLY
-12V ANG
+5V DIG
TWETEER L
SPEAKER L
TWETEER R
SPEAKER R
PHONES BOARD