Ic Block Diagram - Yamaha Portatone PSR 1000 Service Manual

PSR-1000/PSR-2000

IC BLOCK DIAGRAM

SN74HCU04NSR (XW842A00)
SN74HCU04N (IG142250)
Hex Inverter
DM: IC510, 511
AM: IC301
1A 1
14
2
1Y 13
3
12
2A
2Y 4 11
5 10
3A
6
3Y
Vss 7
SN74HC132NSR (XW792A00)
MM74HC132SJX (XY352A00)
Quad 2 Input NAND
DM: IC914
1A 1 14
2 13
1B
1Y 3 12
2Y 4 11
2A 5 10
2B 6 9
7 8
GND
HD74LV245ATELL (XW744A00)
74LVC245APW (XZ286A00)
TC74VHCT245AFT (XT744A00)
Octal 3-State Bus Transceiver
DM: IC103, 104, 301-303, 304-306, 911
20
D1R 1
19
2
A1
18
A2 3
17
4
A3
16
A4 5
15
6
A5
14
A6 7
13
8
A7
12
A8 9
11
10
GND
20
HD74LV08AFPEL (IS000800)
Quad 2 Input AND
DM: IC101
1A
VDD
1B
6A
1Y
6Y
2A
5A
2B
5Y
2Y
9
4A
VSS
8 4Y
SN74HCT138NSR (XY865A00)
3 to 8 Demultiplexer
DM: IC600
VDD
A
4B Select
B
4A
C
G2A
4Y
Enable G2B
3Y
G1
3B
Output
Y7
3A
GND
SN75C1168N (XU463A00)
Line Driver/Receiver
AM: IC307
1B
Vcc
1A
G
1R
B1 1DE
B2
2R
B3 2A
2B
B4
GND
B5
B6
B7
B8
1 14 VDD
2 13 4B
3 12 4A
4 11 4Y
5 10 3B
6 9 3A
7 8 3Y
1
16 Vcc
A
2 YO
B Y0 15
3
14 Y1
C Y1
4 13 Y2
G2A Y2
Output
5 G2B 12 Y3
Y3
6
11 Y4
G1 Y4
7 Y5
Y7 Y5 10
Y6
8 9 Y6
1 16 Vcc
2
15
1D
3 14
1Y
4
13 1Z
5
12
2DE
6 11
2Z
7
10 2Y
8
9 2D
HD74LV21ATELL (X0010A00)
Dual 4 Input AND
DM: IC310
1A 1 14 Vcc
1B 2 13 2D
NC 3 12 2C
1C 4 11 NC
1D 5 10 2B
1Y 6 9 2A
GND 7 8 2Y
HD74LVC139FPEL (XS048A00)
Dual 2 to 4 Demultiplexer
DM: IC308
1G 1 Vcc
16
G
2 G
1A 15 2G
A
A
3
1B 14 2A
B
B
1Y0 4 13 2B
Y0
1Y1 5 Y0 12 2Y0
Y1
6 Y1
11
1Y2 2Y1
Y2
1Y3 7 Y2 2Y2
10
Y3
Y3
GND 8 9 2Y3
M5227P (XF751A00)
5-Band Graphic Equalizer
AM: IC104, 105
47k
IN1 1 16 -Vcc
10k
2 15
GND
NF1
540
10k
47k
3 14
+Vcc
IN2
4 13 OUT
NF2
540
+ -
540 47k
5 12
-IN
IN3
6 11
+IN
NF3
540 47k
47k
540
7 10 NF5
IN4
+ -
8 9 IN5
NF4
540 47k