Block Diagram; Ic Block Diagram - Yamaha Portatone PSR-550 Service Manual

PSR-550

IC BLOCK DIAGRAM

TC74HCU04AP (IG142200)
SN74HCU04N (IG142250)
Hex Inverter
AM : IC810
1
1A 14
2 13
1Y
3
12
2A
4
2Y 11
5
10
3A
6
9
3Y
Vss 7 8
TC74HC138AP (IR013800)
SN74HC138N (IR013850)
3 to 8 Demultiplexer
DM : IC350, 600
1
A
A
2
B
B Y0
Select
3
C
C Y1
4
G2A G2A Y2
5
G2B G2B Y3
Enable
6
G1 G1 Y4
7
Output Y7 Y7 Y5
Y6
8
GND
µPC4572HA (XF633A00)
Dual Operational Amplifier
AM : IC100
A
- -
1 2 3 4 5 6 7
+V -IN -V -IN
OUT +IN +IN
A A A B B
18
TC74HC32AP (IR003200)
SN74HC32N (IR0032500)
Quad 2 Input OR
DM : IC360
VDD
6A
6Y
5A
5Y
4A
4Y
TC74HC374AP (IR037400)
SN74HC374N (IR037450)
Octal 3-State D-Type Flip-Flop
DM : IC500, 700
OUTPUT
16
Vcc
CONTROL
15
Y0
14
Y1
13
Y2
12
Y3
Output
11
Y4
10
Y5
9
Y6
M5291P (XV856A00)
DC-DC Converter
DM : IC900
Switch-Collector
B
8 9
Switch-Emitter
+V
OUT
B
Capacitor
Ground
1A 1 14 V
CC
1B 2 13 4B
1Y 3 12 4A
2A 4 4Y
11
2B 5 10 3B
2Y 6 3A
9
7 GND 8 3Y
1 20 Vcc
1Q 2 19 8Q
Q Q
OE OE
D CK CK D
1D 3 18 8D
2D 4 D CK CK D 17 7D
OE OE
Q Q
2Q 5 16 7Q
Q Q
3Q 6 15 6Q
OE OE
D CK CK D
3D 7 14 6D
4D 8 13 5D
D CK CK D
OE OE
Q Q
4Q 9 12 5Q
GND 10 11 CLOCK
1
S
Q
R
2
Generator
Comparator
3
1.17V
+
reference
voltage
4
TC74HC74AP (IR007400)
SN74HC74N (IR007450)
Dual D-Type Flip-Flop
DM : IC999
1
1CLR
2
1D D
D
3
1CK CK
4
1PR
PR CK
5
Q
1Q
PR
6
Q
1Q Q
GND 7
Q
INPUTS
PR CLR CLK D
L H X X
H L X X
L L X X
H H f H
H H f L
H H L X
SN75C1168N (XU463A00)
Line Driver / Receiver
AM : IC700
1
1B
2
1A
3
1R
4
1DE
5
2R
6
2A
7
2B
8
GND
8
Driver
7
Peak current detect
6
Power supply
5 Input
14 VCC
13
2CLR
12
2D
11
2CK
10
2PR
9
2Q
8
2Q
OUTPUTS
Q Q
H L
L H
H H
H L
L H
Q Q
O O
16 Vcc
15 1D
14
1Y
13 1Z
12
2DE
11
2Z
10
2Y
9 2D