Ic Block Diagram（Ic ブロック図 - Yamaha Audiogram 3 Service Manual

IC BLOCK DIAGRAM（IC ブロック図）
BA10339F-E2 (X6266A0R)
MIX3: IC402
Ground Sense Comparator
OUT2
1 OUT3
14
2
OUT1 13 OUT4
3
Vcc V
12
+ -
-IN1 4 - + 11 +IN4
+IN1
5 -IN4
10
-IN2
6 9 +IN3
+ -
- +
7 -IN3
+IN2 8
BD2056AFJ-E2 (X9691A00)
PSUSB: IC301
USB High Side Switch
GND /OC1
1 8
IN OUT1
2 7
EN1 3 6 OUT2
/OC2
EN2 4 5
NJM072BM-E-TE1 (X4543A01)
MIX3: IC101
Dual Operational Amplifier
V +
A Output 1 +V 8
A -Input 2 7 B Output
- +
A +Input B -Input
3 6
+ -
V -
B +Input
4 5
NJM2374AM-TE1 (X9482A00)
PSUSB: IC401, IC501, IC601
PWM DC/DC Converter
Cs 1
Es 2
C
3
T
EE
GND 4
3
EN1
Charge
OCD1
pump1
SW1
2
IN
UVLO
EN2
4
SW2
Charge
OCD2
pump2
GND 1
NJM2068MD-TE2 (X3505A00)
MIX3: IC201
PSUSB: IC201, IC202
Dual Operational Amplifier
Output A
1
Inverting
2
Input A
Non-Inverting
3
Input A
-DC Voltage Supply
4
Cs 1
C
8
D
1.5A
S
7
I
160Ω
+
6 V
Es 2
+
IN
5
Maximum
ON duty 9.1
OSC BLOCK
C 3
T
Vref
1.25V
±2%
GND
4
8 /OC1
Gate
Logic1
TSD1
7 OUT1
OUT2
6
TSD2
5
/OC2
Gate
Logic2
+DC Voltage
+V 8
Supply
Output B
7
- +
Inverting
6
+ -
Input B
Non-Inverting
-V 5
Input B
AUDIOGRAM3
8
C
D
Q S
PWM
Logic
R
S
7 I
Vth=300mV
Ipk Sense
+
6 V
PWM COMP
+
ERR. AMP
IN
5
BA4560RF-E2 (X6897A00)
MIX3: IC301, IC302, IC401
Dual Operational Amplifier
Output 1 VCC
1 +V 8
-Input 1 Output 2
2 7
- +
+Input 1 -Input 2
3 6
+ -
VEE +Input 2
4 -V 5
NJM4580L (XF195A00)
MIX3: IC303
Dual Operational Amplifier
A B
- -
1 2 3 4 5 6 7 8
OUT -IN +IN -V +IN -IN OUT +V
A A A B B B
9