Ic Block Diagram - Yamaha P-70 Service Manual

P-70/P-70S

IC BLOCK DIAGRAM

NJM4580E (TE2) (X2331A00)
Dual Operatinal Amplifier
DM: IC402
Output A 1
Inverting
2
Input A
- +
Non-Inverting
3
+ -
Input A
-DC Voltage Supply 4 -V
LA4536M (X6813A00)
Headphone-stereo Power Amplifier
AM: IC301
POWER
1
P/SW
SWITCH CIRCUIT
2
IN 1 Amp1
3
PRE GND
4
IN 2 Amp2
5
REF BIAS
ADCS7478AIMF (X5892A00)
Analog to Digital Converter
DM: IC201
V 1
DD
SUCCESSIVE
APPROXIMATION
GND 2
ADC
CONTROL
V 3 T/H
IN
LOGIC
20
IC
（ ブロック図）
SN74AHCT1G08DCKR (X0158A00)
Single 2-Input Positive-AND Gate
DM: IC302, 303
+DC Voltage
GND
+V 8
Supply
7 Output B
Inverting
6
Input B
Non-Inverting
5
Input B
BD45365G (X5888A00)
Reset
DM: IC103
MUTE
10
MT/SW
9
OUT 1
8
POWER GND
7
OUT 2
6
V
CC
6 CS
5 SDATA
4 SCLK
1
A 5 Vcc
2
B
3
4
Y
FUNCTION TABLE
INPUTS OUTPUT
A B Y
H H H
L X L
X L L
V
DD
5
4 Vout
-
Oscillating circuit
+ Counter timer
Vref
3 1
GND ER
M4580L (XF195A00)
Dual Operational Amplifier
AM: IC101-104
A B
1 2 3 4 5 6 7 8
+ + +
IN V IN IN V
OUT IN OUT
A A A B B B
S-80136ANMC-JCV-T2 (X4374A00)
Reset
DM: IC103
V 5
DD
Delaying circuit
+
Oscillating circuit
- Counter timer
V
REF
V 2
SS
3 1
N.C DS
4 OUT