Yamaha SILENT Piano YU11SD Instrukcja serwisowa - Strona 15

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Yamaha SILENT Piano YU11SD Instrukcja serwisowa
IC BLOCK DIAGRAM
MM74HC14SJX_NL (XW104A00)
Hex Inverter
KEY SENSOR: IC006
1A
VDD
1
14
1Y
2
13
6A
2A
6Y
3
12
2Y
5A
4
11
3A
5Y
5
10
3Y
4A
6
9
GND
7
8
4Y
SN74AHCT245PWR (X2709A00)
TC74VHCT245AFT(E,K) (XT744B00)
Octal 3-State Bus Transceiver
DM: IC028
D1R
1
20
A1
2
19
A2
3
18
A3
4
17
A4
5
16
A5
6
15
A6
7
14
A7
8
13
A8
9
12
GND
10
11
LA6517M-TRM-E (XT131A00)
Dual Power Operational Amplifier
AM: IC209
NC
NC
1
16
NC
NC
2
15
INPUT -1
OUT 1
3
Amp1
14
VCC
INPUT +1
4
13
Thermal Shut
Doun and
Current Limiter
OUT 2
INPUT +2
5
12
Amp2
VEE
INPUT -2
6
11
NC
NC
7
10
NC
8
9
NC
（IC ブロック図）
SN74LV32APWR (X5647A00)
Quad 2 Input OR
DM: IC018
1A
1
1B
2
1Y
3
2A
4
2B
5
2Y
6
GND
7
SN74AHC1G08DCKR (X3833A00)
TC7S08FU (XP116A00)
Single 2-Input Positive-AND Gate
DM: IC002, 023
A
V
CC
B
G
GND
B1
B2
B3
INPUTS
B4
A
B5
H
L
B6
X
B7
B8
HA1630Q04T 4CH (X2869A00)
Quad Operational Amplifier
KEY SENSOR: OP001, 002
OUT A
1
2
-IN A
+IN A
3
+V
DD
4
+IN B
5
-IN B
6
OUT B
7
Vcc
14
4B
13
4A
12
4Y
11
3B
10
3A
9
3Y
8
1
5
Vcc
2
3
4
Y
FUNCTION TABLE
OUTPUT
B
Y
H
H
X
L
L
L
14
OUT D
-
+
13
-IN D
+
-
+IN D
12
-V
+V
SS
-V
11
+IN C
10
+
-
9
-IN C
8
OUT C
SILENT SD SERIES
SN74LV126APWR (X3865A00)
Bus Buffer
DM: IC029
1G
1
14
2
13
1A
3
12
2Y
4
2G
11
5
10
2A
6
9
2Y
7
GND
8
NJM2068M-D (TE2) (X3505A00)
µPC4570G2-E1-A (X7351A00)
Dual Operational Amplifier
DM: IC014
+DC Voltage
Output A
1
+V
8
Supply
Inverting
Output B
2
7
Input A
-
+
Non-Inverting
Inverting
3
6
+
-
Input A
Input B
Non-Inverting
-DC Voltage Supply
4
-V
5
Input B
Vcc
4G
4A
4Y
3G
3A
3Y
15