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ROM2
ROM1
MSM23C3210MC
MSM27C802CZ-463
-12CA89
LSI2 (8Mbit)
LSI3 (32Mbit)
RA0 ~ RA20
RD0 ~ RD15
Working
EA0 ~ EA14
RAM
ED0 ~ ED8
TC55257
ECEB, EOEB
GFL-70L
EWEB
LSI5
(256Kbit)
BLOCK DIAGRAM
Keyboard
SI0 ~
KC0
SI7
~
FI0 ~
KC7
FI7
Key Controller
TC190C020AF-001
LSI10
RESB
A1 ~ A4
D0 ~ D15
RESB
A0 ~ A3
DSP
D8 ~ D15
HG51B155FD
RD,
HWR
LSI4
WOK1
SOLP
BOK
D/A Converter
µPD6376GS
LSI1
LPF
LPF
(L)
(R)
Main
Volume
Power Amp.
LA4620
IC201
Out put
(L)
(R)
Speakers
SEG1 ~ SEG40
MIDI
LCD Driver
IN
OUT
SED1278F2A
LSI501
COM1 ~ COM16
DB4
~DB7
LEDCK, LEDCL
CONT,
LRS,
LR/W
LE
CPU
LSDT
PBO
SWCK
HD6473042F16-463
LSI9
NMI
RESET
1RD, 1HWR, 1LWR
A0 ~ A15
D0 ~ D15
IC1
Reset IC
RN5VD40A
IC3
VC
VDD
VCC
CVDD
DVDD
AVDD
Power Supply Circuit
Q205,
Q203, Q204, Q207,
Q206
Q208, Q212, Q213
— 6 —
LCD
Back Light
Back Light Driver
NT-07
Q501, Q502
S-Register
TC74HC164
LEDA ~ LEDF
IC301
S-Register
TC74HC164
KC0 ~ KC8
IC302
KI0 ~ KI7
Chip Selector
TC74HC08
IC4
D8
VBR
D15
RAM1
TC551001BFL-70L
LSI8 (1Mbit)
S1
HWR, RD
VBR
Back up
VDD
Power
CR2032
APO
LEDs
Buttons
VDD
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