Ic Block Diagram （Icブロック図 - Yamaha ACU16-C Service Manual

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IC BLOCK DIAGRAM
TC74LVX4245FS (XU229A00)
MAIN: IC403
TRANSCEIVER
DIR 2
G 22
A1 3
A8 10
TC74VHC138FT
MAIN: IC205, IC206
3-8 DEMULTIPLEXER
TE
L 13942296513
1
A
Select 2
B
B
3
C
C
4 G2A
G2A
Enable
5
G2B
G2B
6
G1
G1
Output
7
Y7
Y7
8
GND
TC74VHC32FT
MAIN: IC210, IC213, IC216, IC217
OR
1A 1
1B 2
1Y 3
2A 4
2B 5
2Y 6
www
GND 7
.
http://www.xiaoyu163.com
（IC ブロック図）
V V
CCA CCB
1 23 24
Logic
Level
Converter
Same as above block
11 12 13
(XZ495A00) TC74VHC163FT (X2378A00)
MAIN: IC313, 507, 508
16
Vcc
A
Y0 15 CLOCK
YO
14
Y1
Y1
13
Y2
Y2
Output
Y3 12
Y3
11
Y4
Y4
ENABLE
Y5 10
Y5
P
Y6
9
Y6
TC7S04F (XM182A00)
(XY945A00)
DAC: IC211, IC411
TC7SH04FU (XS775A00)
MAIN: IC413, IC419
INVERTER
14 Vcc
13 4B
12 4A
11 4Y
10 3B
9 3A
8 3Y
x ao
y
i
http://www.xiaoyu163.com
8
V 1
CCA
DIR 2
3
A1
A2 4
A3 5
A4 6
A5 7
A6 8
21 B1
A7 9
A8 10
14 B8
GND 11
GND 12
(TOP VIEW)
Q Q
3 6 7 1 3
CLEAR 1 16 Vcc
RIPPLE
2 CK R 15 CARRY
OUTPUT
C
A 3 A QA
14 QA
B 4 B QB 13 QB
C QC
C 5 12 QC
D 6 D QD 11
QD
EN EN
ENABLE
10
7 P T
T
GND 8 9 LOAD
1 5
NC VDD
IN 2
3 4
VSS OUT
u163
.
2 9 9 4 2 8
24
V
CCB
23 V
CCB
22
G
21 B1
20
B2
19 B3
18 B4
17 B5
16 B6
15
B7
14 B8
INPUTS FUNCTION
OUTPUTS
G DIR A-BUS B-BUS
13 GND
L L A=B OUTPUT INPUT
L H B=A INPUT OUTPUT
H X Z High lmpedance
TC74VHC244FT (XW234A00)
MAIN: IC402, IC408, IC409
BUS BUFFER
1 20
1G
1 5 0 5 8 2 9 9 4
2 19
1A1
3 18
2Y4
4 17
1A2
2Y3 5 16
1A3 6 15
2Y2 7 14
13
1A4 8
9 12
2Y1
10 11
(GND) Vss
m
co
ACU16-C
9 9
X : Don't Care
Z : High lmpedance
V (Vcc)
DD
2 8 9 9
2G
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
17