Yamaha BBT500H Service Manual page 16

BBT500H
IC BLOCK DIAGRAM
SN74LVU04APWR
DM: IC116
Inverter
1A
1 14
1Y
2 13
2A
3
2Y
4
3A
5
3Y
6
GND
7
SN74LV4040APWR (X3935A00)
DM: IC119
NAND
1
QL
2
QF
3
QE
4
QG
5
QD
6
QC
7
QB
8
GND
SN74LV4053APWR (X2719A00)
DM: IC108
MULTIPLEXER
2Y1 1
2
2Y0
3
3Y1
4
3-COM
5
3Y0
6
INH
7
GND
8
GND
16
（IC ブロック図）
(X3936A00)
SN74LV245APWR (X3693A00)
DM: IC107,109,110
Transceiver
Vcc
6A
6Y
12
5A
11
5Y
10
4A
9
4Y
8
11
CLR
16 VCC
10
CLK
15
QK
14
QJ
13 QH
12
QI
11
CLR
10 CLK
9 QA
R
T
2
11
A
16 VCC
15
2-COM
14
1-COM
10
B
13
1Y1
12
1Y0
11
A
9
10 B
C
9 C
6
INH
DIR Vcc
1 20
OE
2 19
A1
B1
3 18
A2
A3 B2
4 17
B3
5 16
A4
A5 B4
6 15
B5
A6 7 14
B6
8 13
A7
B7
A8 9 12
GND B8
10 11
R R
T T
9
Q A
R R R
T T T
4 13
Q F Q G Q H
NJM5532M-TE1 (X4980A00)
DM: IC112-115
NJM4556AM-TE1 (X5049A00)
DM: IC117,118
NJM072BM-E(TE1) (X4543A00)
DM: IC301
OP AMP
1 +V 8
A
2 7
- +
B
3 6
+ -
4 -V 5
R R R
T T T
7 5 6
Q B Q C Q D
R R R
T T T
12 14 15
Q I Q J Q K
15
14
12
13
2
1
5
3
4
PIN FUNCTION
1 . A OUTPUT
2 . A - INPUT
3 . A + INPUT
4 . V -
5 . B + INPUT
6 . B - INPUT
7 . B OUTPUT
+
8 . V
3
Q E
1
Q L
2-COM
1-COM
1Y0
1Y1
2Y0
2Y1
3Y0
3Y1
3-COM