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53
ViewSonic Corporation
Confidential - Do Not Copy
VX2255wmh-4
VX2255wmb-4
7. Block Diagram
EMI F
ilter
Circuit
5V Sw
itch to
Panel
Power S
w
itch
transforme
r
Regulator
(5V to 1.8V
)
Inverter Circuit
OZ99
38G
Rectifier
/ filter
5V
Output
Photocouple
r
Protection
feedback
EEPRO
M
A
T
24C04
N(V
G
A
)
Ke
y
& LED
Sampling V
o
lt
age
feedback
EEPRO
M
24C04
Audio Input
AC Input
VGA
Input
Ke
y
Input
S
peaker
Panel
Back lamp
Regulator
(5V to 3.3V
)
Rectifier
&
F
ilter
Circuit
Rectifier
/ filter
16V Outpu
t
Sampling V
o
lt
age
feedback
VGA
Input
Circuit
SCALER
& MCU
( TSUMU058J
)
Audio Amplifier
(TDA84
96L)
MCU
V
olume Control
16V Input
ON/
O
F
F
&
Brightness
ON/OF
PWM Control
NCP1337
EEPRO
M
A
T
24C04
N(DVI
)
DVI
Input(
HDCP)
DVI Input
Circuit(Option)
Flash
memor
y
MO
SFET
Sw
itch
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