NEC AccuSync LCD72VM - Page 149

9-3
3. POWER BOARD BLOCK DIAGRAM (MODEL: LCD72VM)
EMI FILTER
CCFL
Feedback control
Circuit
Rectification
Transformer
Surge
Protection
B+
ON/OFF Control
DIM Control
Dimming
Control Circuit
Feedback
Control Circuit
PWM
Control IC
Start
Circuit
Buck & DC
Current Circuit
Royer –type L, C
Resonance circuit
& Boost circuit
Ballast
Capacitor
Starting
Resistance
Switching circuit PWM
control IC& MOSFET
Diode rectifier
& Filter
Low drop
Regulator
+12v to Inverter
+3.3V
to Scaler board
DC to DC
Converter
+5V
to Scaler board
AC Input
+12
to Audio board