HCL HCMELWBT11 Service Manual page 16

18.5" LCD Color Monitor
5.2.2 Power Board
AC input
EMI filter
Lamp
Feedback
Circuit
Bridge
Rectifier
and Filter
Start Resistor
R904, R932, R933
PWM Control
(IC901)
Output
Transformer
(T801)
Circuit
Rectifier
Transformer
diodes
Power Switch
（Q901）
Photocoupler
(IC902)
MOSFET
(Q802)
PWM Control
TL494IDR
(IC801)
16
HCL HCMELWBT11
12V
5V
Feedback
Circuit
12V
Transistor
ON/OFF
（Q805,Q808）
DIM