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20” LCD Color Monitor BenQ G2020HDA
37
Power Board
12V
ON/OFF
EMI filter
Start Resistor
R904, R932
PWM Control
(IC901)
Transformer
AC input
Feedback
Circuit
Transformer
(T801)
MOSFET
(Q802)
Lamp
5V
Bridge Rectifier
and Filter
Feedback Circuit
Rectifier diodes
Output Circuit
PWM Control
TL494IDR
(IC801)
Power Switch
(Q901)
Photocoupler
(IC903)
12V
DIM