Yamaha ACD1 Service Manual page 21

TC7SH00FU (X7285A00)
BRG: IC401
2 Input NAND Gate
IN B Vcc
1 5
IN A 2
3 4
GND OUT Y
TC74HC4051AFT (X8800A00)
DS1: IC508, IC509, IC526
DS2: IC612–614
12-Stage Binary Ripple Counter
1
16
4 Vcc
2 15
6 2
3
14
COM 1
4
13
7 0
5
12
5 3
6
11
INH A
7
10
V B
EE
8
9
GND C
RTC-4543SA (X2548A00)
CPU: IC013
Real Time Colck
GND FOUT
1 14
N.C. 2 13 N.C.
CE N.C.
3 12
FSEL DATA
4 11
WR 5 10 CLK
FOE V
6 9 DD
N.C. 7 8 N.C.
SN74AHC1G32DCKR (X4642A00)
ENT2: IC111
2-Input OR Gate
IN A
1
IN B 2
3
GND
A
B
C
INH
32.768kHz
OSC DIVIDER
FOUT
14
OUTPUT
4
FSEL
CONTROLLER
FOE 6
DATA
11
I/O
CLK
10
CONTROLLER
WR 5
CE
3
TC7SH32FU (XW633A0R)
BRG: IC116, IC117
ENT2: IC111
2-Input OR Gate
Vcc IN B
5
IN A
4
OUT Y
GND
COM
C
I/O O/I 0
1
2
3
4
5
6
C
I/O O/I 7
CLOCK AND CALENDAR
SHIFT REGISTER
VOLTAGE
DETECT
CONTROL
CIRCUIT
ACD1
Vcc
1 5
2
3 4
OUT Y
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