Power Supply Section - LG 42LH90 Manual

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POWER SUPPLY SECTION

This switch mode power supply develops Stand By 5V at

all times when AC is applied.

At power on, it develops 12V and 24V for the Main board

And 24V for the Inverter.

This power supply draws a little less that 1 watt during

stand by mode. The fuse F101 reads 159.9V

(from hot ground) during this time.

When the controller chip (IC501) receives the PWR-ON

command via P201 Pin 19, the primary section increases

its current supplying ability.

The Primary fuse F101 now reads 390V.

P201 Connector: (To Main Board)

12V is routed out P201 pins 5 and 6 and

24V is routed out P201 pins 1 and 2.

P203 Connector: (To Inverter Board)

24V is routed out P203 pins 1 through 5.

February 2010

LCD DV

42LH90

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