6.3.2 Inverter / Power Board Block Diagram
AC inlet
On/off control
PWM control IC
Dimming control
filter
Rectifier and filter
Start circuit
Switching circuit
PWM control IC&MOSFET
Start circuit
BUCK and chock
Transformer
Rectifier and filter
LC royer circuit
16
12V/5V
To main board
Feedback circuit
12V
Ballast capacitor
Feebback circuit
HP L1702
lamp