Yamaha SPX990 Service Manual page 16

SPX990
SPX990
HiC
BLOCK
DIAGRAM
(1C
y^U
® SN74HC04IM
(IR000450)
©
SIM74HC14N
(1R001450)
Hex
Inverter
Hex
Inverter
©
TC74HC123AP
{1R012300^'
Dual Retriggerable Single
Shot
©
SN74HC245N
(IR024550)
Octal 3-State
Bus
Transceiver
© SI\I74HC273N (IR027350)
Octal
D-Type
Flip-Flop
©
SN74HC367N
(IR036750)
Hex
3-State
Bus Buffer
® NJIVI2903 (IG031000) ®
RC4558D-V
(IG001390)
Dual Single-Supply
Comparator
® IMJIVI4556DE
(XA772A00)
©
M5238P
R610
(XJ748A00)
Dual Operational Amplifier
r
Oiiipui
A
,
*DC
Supply
Output
A
1
d)—
J
*v(s
.
»OC VolMgc
)Su«)lv
Invcflmq Invcfling
^
4\
/\ A
Inout
A
LJ
I
Non
invcrtmo
I i
f
\
Iflveriinfl
Inout
A
Jr
^
A
4
\ liwetiing
!noul
A
'J
»
r"rj
^
lopul 0
Inpul
A
1
LjVf
'
Input
8
Gfound
®
GND 1
Non-
Inverting
Jn©gl 0
-OC
Voltage Supply
i
®
-V
L—
„.(s
\
Mqm
Invert kv)
^
Inpul
D
19