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