Yamaha tx81z Service Manual page 31
Fm tone generator
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Also See for tx81z:
- Owner's manual (92 pages) ,
- Product manual (88 pages) ,
- Service manual (37 pages)
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TX81Z
TX81Z
*
YJV13012 (IT301 200)
Digital
to
Analog
Converter
PIN
NO.
NAME
I/O
FUNCTION
PIN
NO NAME
I/O
FUNCTION
1
VDP
i
OC
supply
I
+
&V
1
e
CHI
0
Sample and
hold analog
SW
output
(chi
3
2
CLOCX
i
T
irr
iny
Clocfc
10
CH2
o
I.ch23
3
D
GND
i
Uigita.'
ground
n
COM
1
Chi
cP2
analog
SW
common
input
4
&
i
Serial
da
Id
hpol
i?
A
GUT o
Analog output
9uMer
AMP
5
SAM2
i
Sample gnd
hold
-!ch
2
*3
MP
1
Middle
po*m
1/2
VDDvias
<3
SAMI
i
•:.:r
i
i
14
BC
I
B
ia i
corn
per'-sai
i
OO
7
1CL
!
linhal clear
15
ne
0
0
as
P
H
A
GND
1
L
L
Analog
-ground
16
A
GnD
1
Analog ground
1C
BLOCK
DIAGRAM
*
TC40HQ04P
GOBI
000)
*
SN74HC14N
(IR0G1450)
*
SN74HC32N
1IR0032EO)
*
SN74HC04N
( I
R
0004
50)
Hex
Inverter
Quad2lnputOR
Hex
Inverter
Vcc
AB
4A
4 Y
30
r.A
.TV
S.
•
TC40H074P
(IGOSHOO)
Dual
D-Type
Flip-Flop
•
SN74HC138W
(IR013B50S
3
to
8
Demultiplexer
*
NJM
072D
(IG
107000)
Dual Operational Amplifier
31
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