Power Supply Start Up Sequence - LG 42LH50 Training Manual

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