LG FLATRON W1742S Service Manual page 12

Color monitor
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Power
EMI filter
100~240V
Inverter
12V
VDDA
ON/OFF
ON/OFF circuit
DIM
DIM circuit
BLOCK DIAGRAM-POWER
Rush
prevention
5V/12V
output OVP
Push-pull
circuit
 
Rectification
 
Starting
resistor
Feedback
control
circuit
Transformer
conversion
PWM IC
OZ9938GN
- 12 -
Transformer
Switching
circuit (PWM
control IC &
MOSFER)
LC resonance
OVP circuit
Sampling
Feedback
circuit
5V
Diode
rectifier
 
12V
OVP protect
circuit
2 CCFL lamps
Lamp open
protection

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