Power/ Inverter Board Block Diagram - Lenovo L2021 Wide Service Manual

Lenovo Service Manual

5.3 Power/ Inverter Board Block Diagram

Fuse EMI
AC input
100-240V
Vcc
Power part
Switching MOS
12V DC
Q802-AM9945
IC Power Supply
Converter
Inverter part
Smoothing
Rectifier
Capacitor
C907
IC-PWM
IC901
DC-AC
Transformer
T801
PWM Control IC
IC801-TL494
Transformer
T901
MOS
Q901
Sense
resistor
PhotoCoupler
Resonance NET
Open Lamp Protection
16
12V
Rectifier
5V
Rectifier
Vcc
Rectifier
regulating
Sampling
High Voltage
Output
Current Sampling
L2021W
12V
5V
2- CCFL