Ic Block Diagram - Yamaha Portable Grand DGX-220 Service Manual
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Also See for Portable Grand DGX-220:
- Owner's manual (118 pages) ,
- Service manual (53 pages) ,
- Manuale di istruzioni (118 pages)
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DGX-220/YPG-225
■ IC BLOCK DIAGRAM
SN74LV32APWR (X5647A00)
Quad 2 Input OR
DMLCD:IC207
1A
1
1B
2
1Y
3
2A
4
2B
5
2Y
6
7 GND
LA4625 (XY209A00)
Power Amplifier
AMJK: IC551
DC
2
RIPPLE
FILTER
PREDRIVER
IN1
1
+
IN
-
PREDRIVER
PRE-GND
3
BIAS
CIRCUIT
STBY
4
STANDBY
SW
PREDRIVER
IN2
6
+
IN
-
PREDRIVER
POP NOISE
PREVENTION
CIRCUIT
5
7
ON TIME
POP
18
SN74LV138APWR (X7284A00)
DECODER
DMLCD: IC401,402
Select
14
Vcc
13
4B
12
4A
Enable
11
4Y
Output
10
3B
GND
9
3A
ENABLEINPUTS
8
3Y
G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X
H
X
X
L
X
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
V
CC
14
OUTPUT PIN TO V
CC
SHORT PROTECTOR
-OUT1
13
POWER
LOAD SHORT
POWER
12
PWR-GND1
GND1
PROTECTOR
+OUT1
11
POWER
OUTPUT PIN TO GND
OVER VOLTAGE/
SHORT PROTECTOR
SURGE
V
CC
THERMAL
OUTPUT PIN TO GND
SHUT DOWN
SHORT PROTECTOR
-OUT2
9
POWER
LOAD SHORT
POWER
10
PWR-GND2
PROTECTOR
GND2
8
+OUT2
POWER
OUTPUT PIN TO V
CC
SHORT PROTECTOR
1
16
A
Vcc
A
2
B
15
B
Y0
Y0
3
C
14
C
Y1
Y1
4
13
G2A
G2A
Y2
Y2
5
12
G2B
G2B
Y3
Y3
Output
6
11
G1
G1
Y4
Y4
7
10
Y7
Y7
Y5
Y5
Y6
8
9
Y6
SELECTINPUTS
OUTPUTS
X
X
X
X
H
H
H
H
H
H
H
H
X
H
X
X
H
H
H
H
H
H
H
H
X
X
X
X
H
H
H
H
H
H
H
H
L
L
L
L
L
H
H
H
H
H
H
H
L
L
L
H
H
L
H
H
H
H
H
H
L
L
L
H
H
H
L
H
H
H
H
H
L
L
H
H
H
H
H
L
H
H
H
H
L
H
L
L
H
H
H
H
L
H
H
H
L
H
L
H
H
H
H
H
H
L
H
H
L
L
H
H
H
H
H
H
H
H
L
H
L
H
H
H
H
H
H
H
H
H
H
L
BA4510F-E2 (X7300A00)
Dual Operational Amplifier
DMLCD: IC502
+DC Voltage
Output A
1
+V
8
Supply
Inverting
2
7
Output B
Input A
-
+
Inverting
Non-Inverting
3
6
+
-
Input B
Input A
Non-Inverting
-DC Voltage Supply
4
-V
5
Input B
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