Block Diagram - Roland G-70 Service Notes

Feb.2005

BLOCK DIAGRAM

SDRAM
buffer
IC7,IC8
3.3V--->5V
128Mb x 2
Work RAM
ADC IN
32bit
IC11
CPU
P2027A IC6
64MHz Bus
SH-3 7709S
200MHz
X1
16.000MHz
aftertouch
KeyScan
IC74
SLAC02AF2H
MAIN BOARD
TP/8SP (with aftertouch)
POWER SUPPLY BOARD
IC1
LM7812
AC 100~240V
SWPS
A1DU2L3B034
48
PCMCIA Card Slot
NOR Flash NAND Flash
IC82 IC81
64Mb 512Mb buffer
Program User USB Storage 3.3V<--->5V
16bit 8bit 16bit
16bit 8bit
buffer
3.3V<--->5V
X2
16.9344MHz
SDRAM
FDC
IC38 64Mb
X4 IC78 Effect RAM
24.000MHz FDC37C78 16bit
Mask ROM
IC51<--->IC56
128Mb x 6
Wave ROM
Keyboard
FDD
+5V
+12V
-12V
IC2
LM7912
Colour LCD DC-AC INVERTER
LCD QVGA MOD1 DHE1105-5VE
Control Board
320x240
Video OUT
ADC IN
buffer
3.3V--->5V
8bit
16bit
LCDC DRAM SURUGA
IC66 IC102 16Mb IC75
X3
S1D13506F00A2 Video RAM R02780623
16.000MHz
16bit 8bit
16bit 16bit
X5
USBC
12.000MHz
IC83
WX
M66291GP
IC40
T6TV2TB-0001
CODEC
IC60 AK4527B
A/D 2ch, D/A 6ch
Wave Bus
SRX BASE BOARD
FLASH ROM
X1 IC1 4Mb
16.000MHz
ADC
16bit IC16 AK5351VF
CPU
H8 IC4 DAC
IC17 AK4324
HD6433060F
8bit 8bit
ESP-B ESP-A
DRAM DRAM
IC3 IC2
IC8 IC7
4Mb 4Mb
HARMONIZER BOARD
DBEAM
SW & LED
L- R PANEL BOARD
PHONES
BOARD
USB
6+1 ch.
BUZZER
JACK BOARD
PHOTO
MIDI BOARD
G-70
EFFECT
CONTROLS
ENC
Harmonic Bars
PHONES
OUTPUT
MAIN
VOLUME
DIRECT
HARMONY
HARMONY
MIKE
INPUT GAIN
INPUT
AUX
VOLUME
METRO
BENDER
METRONOME
UNIT
LEVEL
IN
OUT
MIDI
THRU
FOOT
FOOT SW
PEDALS
HOLD
FC-7
49