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

Usb audio interface.
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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

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