LG Flatron L1972H - Block Diagram

- 21 -
Copyright
2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM-POWER
LAMP
High
Low
Module Vcc
Main Board
(Scaler &
DC DC
converter
POWER INVERTER
Inverter
Control
IC
P-ch
Inverter
Trans
SMPS
N-ch
Lamp
Current
Feedback
Over
Voltage
Protection
Power
Control
IC
Feedback
Line Filter
L
N
Drive Block
15V
5V
15V
5V
Inverter On/OFF (3.3V)
Dimming (Lamp Current Control)
Aux Drive
15V
Start