LG Flatron W1943TB - Page 12

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BLOCK DIAGRAM-POWER
Power
Inverter
EMI filter
Rectification
Transformer
5V/14.5V
output OVP
Feedback
control
circuit
Switching
circuit (PWM
control IC &
MOSFER)
OVP protect
circuit
Diode
rectifier
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Starting
resistor
14.5V
Rush
prevention
ON/OFF
DIM
Push-pull
circuit
Transformer
conversion
LC resonance
VDDA
ON/OFF circuit
PWM IC
OZ9938GN
Feedback
circuit
OVP circuit
2 CCFL lamps
Sampling
Lamp open
protection
DIM circuit
14.5V
5V
100~240V
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