LG 42LH50 - Power Supply Start up Sequence

AC In
Stand
By 5V
Remote or Key
Power On
Resets
Microprocessor
Main Board
MAIN PWB
5V Reg
PWR
12V Video
Processing
Inv
On
Microprocessor
IC3202
12V/16V
Regulators
Other
Regs
Stand
By 5V Reg
1
2 5
66
8
2
5
5
5
In Stand-By
Primary side
is 165V
In Run
it is 390V
3
24V
Audio
12V
24V
Power Det. Circuit
8
3.3V Reg
for Micon
LVDS
12V
12V
7
7
At point TV is in
Stand-By state.
Energy Star compliant.
Less than 1 Watt
3
LVDS Panel Control
Inv On/Off
Other Circuits
A-DIM
Fixed
P-DIM
Other Circuits
9
9
Cust Menu for Backlight
Picture Content
Intelligent Sensor feedback
BALLAST SECTION
Relay On (PWR)
Power Supply will
not be on if Main
Power Switch is off.
Ft Control
Master (Main)
Power Sw
On
Off
POWER SUPPLY (SMPS)
+5V
General
L
L
8
Inverter
On
Ballast
Driver FETs
380V
Regulator
6
Manipulates
Backlights
1.2Kv
1.2Kv
48K
Inverter On
Starts the Ballast
Drive Signal
Drive Sig
P-DIM
Backlights
Light
10
4
LVDS
Cable
12V
Video
Blue LED lights to assist
Backlight Lamp Firing
DC Up, Backlight brightness Up
7
11
12V LVDS
To
Panel
PG 25
Video
Processing
section of
Mstar IC100
Tru-
Motion
IC1101
T-CON PWB
42LH50 POWER SUPPLY TURN ON COMMANDS FROM MAIN PWB
42LH50 POWER SUPPLY TURN ON COMMANDS FROM MAIN PWB