3
.
CIRCUIT THEORY
1. Block Diagram
XTAL1
22.118MHz
TOP246Y
OPP/OCP
LDO
5V-3.3V
5V-1.8V
Transformer1
OZ9910
Rectifier &
Filter Circuit
Panel Interface
Lamp2
Keyboard
Lamp3
Keypad
Connector
VGA Input
VGA Connector
Scaler
TSU16AK
AC Line Filter
AC Socket
TFT LCD Panel 17"
MT170EN01(Innolux)
Feedback
OVP
LTV817
Power
Transformer
MCU
W78E65p
Po
we
r
Transformer2
Lamp1
Lamp4
AC Input 90V-264V
XTAL2
14.318MHz
24C16
Open
Protection
Rectifier &
Filter Circuit
24C02
Block Diagram
On/Off
Brightness
O
n/O
ff
Bri
ght
nes
s
12V
5V
AP2301
PMBT3906
Panel Enable
AOP605L
1
2
3
4
1
2
3
4
5V
AOP605L
4
D
o
Not
Copy
VA702/b
ViewSonic
Corporation
Co
nfidential
Содержание VA702B - 17" LCD Monitor
Страница 32: ...6 Black Screen and backlight turn on 29 Do Not Copy VA702 b ViewSonic Corporation Confidential ...
Страница 51: ...9 PCB Layout Main board Top layout 48 Do Not Copy VA702 b ViewSonic Corporation Confidential ...
Страница 52: ...Main board bottom Layout 49 Do Not Copy VA702 b ViewSonic Corporation Confidential ...
Страница 53: ...POWER board 50 Do Not Copy VA702 b ViewSonic Corporation Confidential ...
Страница 54: ...51 Do Not Copy VA702 b ViewSonic Corporation Confidential ...