Block Diagram - Yamaha Portatone PSR-E303 Service Manual

IC BLOCK DIAGRAM
HD74LV32AFPEL (IS003200)
Quad 2 Input OR
DMLCD: IC204
1A Vcc
1 14
1B 4B
2 13
1Y 4A
3 12
2A 4Y
4 11
2B 3B
5 10
2Y 3A
6 9
GND 3Y
7 8
AK4385ET (X6040A00)
D/A Converter
DMLCD: IC431
MCLK DZFL
1 16
2 15
BICK DZFR
3 14
SDTI VDD
LRCK 4 13 VSS
5 12
PDN AOUTL+
CSN AOUTL-
6 11
7
CCLK 7 10 8 AOUTR+
CDTI AOUTR-
8 9
NJM4580E (X2331A00)
Dual Operational Amplifier
DMLCD: IC432
A Output
-
A INPUT
A+INPUT
-
V
De-emphasis
CSN
µP
Control
CCLK
Interface
CDTI
8X
LRCK
Audio Interpolator
Data
BICK
Interface
8X
SDTI
Interpolator
PDN
+
V
1 +V 8
B Output
2 7
- +
-
B INPUT
3 6
+ -
B +INPUT
4 -V 5
MCLK
Clock
Divider
∆Σ
SCF
Modulator
∆Σ
SCF
Modulator
PSR-E303/YPT-300
SN74LV138ANSR (ISO013810)
DECODER
DMLCD: IC831,832
A 1 16
A
Select
2
B Y0 15
B
3 14
C Y1
C
4
G2A G2A Y2 13
Enable
5
G2B Y3 12
G2B
6 11
G1 Y4
G1
Output
7
Y7 10
Y7 Y5
Y6
8
GND 9
VDD
VSS
DZFL
DZFR
AOUTL+
AOUTL-
AOUTR+
AOUTR-
Vcc
YO
Y1
Y2
Output
Y3
Y4
Y5
Y6
13