LG 42LH90 - Remote Control Functions Overview; Basic TV Operation Buttons; Channel and Feature Control Buttons

POWER SUPPLY (SMPS)
Inverter On
Starts the Inverter
LED Drive Signal
24V B+ for
Inverter
Stand
By 5V
Resets the
Microprocessor
MAIN BOARD
PWR
Inv
On
Mstar
Microprocessor
IC100
(½)
24V
Regulator
12V/24V
Regulators
Other Regs
Stand
By 5V Reg
1
2
5
66
8
8
6
2
4
42LH90 Power Supply Turn On Sequence
42LH90 Power Supply Turn On Sequence
5
5
8
In Stand-By
Primary side is
160V
In Run (PWR On)
Primary side is
390V
3
24V Audio
12V
24V
8
LVDS
12V
12V
7
T-CON BOARD
7
LVDS Panel Control
Inv On/Off
Other
Circuits
A-DIM
Not
Used
P-DIM
Manipulates All
Backlight LEDs
IC1003
9V Reg
9
9
INVERTER
Power On/Off
Local Dimming
Control Signal
Global Dimming
7
34
IC103, Q106
IC702
Reg
3.3V_ST
Remote
Power Button
Power On/Off
12V
T-CON DC-to-DC
Converter generates
3.3V 16V 26V -5V
10
Inverter
On
P-DIM
24V
Inverter On
Local
Dimming
Signal
7
11
Video Arrives
At point TV is
in Stand-By state.
Energy Star
compliant.
Less than 1 Watt
3
Mstar
IC100
(½)
IC3502
Dimming
IC
Cust Menu for Backlight
Picture Content
Intelligent Sensor
Q706
(½)
LVDS
LVDS
To Panel
Left
Side LEDs
To Panel
Right
Side LEDs
8
AC In
Power Supply will
not be on if Main
Power Switch is off.
Main (Master)
Power SW
On
Off
L
L
2
4
Relay On
Q706 (½)
5V Switch
IC1002
5V_TU Reg