LG 55LW5600 - Main Board

MAIN BOARD SECTION
The Main board receives its operational B+ from the Power Supply via P502.
There are two LVDS cable feeds that are output to the T-CON (TFT Driver). These carry the duel 24 bit
LVDS Video and TruMotion Video equaling a 120Hz video signal. These signals have already been
prepared for the T-CON board. The Main board also includes the Frame Rate Converter for 3D, Tuner,
Audio and Audio/Video inputs and selection circuits.
STAND
BY
RUN
Input Voltages from SMPS.
STAND
-
BY
• STBY 3.5V (P502 pins 9~12)
The Main board also develops several B+ sources on the board.
RUN
• 12V (P502 pins 17, 19 and 21).
• 24V (P502 pins 2~4).
GENERAL
LVDS
• Panel_VCC (12V Not generated, but switched
bQ0f
h 12V i i f h SMPS)
STAND-BY VOLTAGES
• 3.3V_ST (Direct from SMPS through L503).
GENERAL
• 5V_Normal IC507 (Made from 12V In).
• 3.3V_Normal IC505 (Made from 12V In).
• 5V USB IC506 (Made from 12V In).
BCM
IC101 Video
Processor
b
y
Q
5
0
7
f
rom t
h
e
12V
arr
i
v
i
ng
f
rom t
h
e
SMPS)
.
TUNER TU2101 and VSB CIRCUIT
• 5V_TU (Made from 5V_Normal through L2101 / 4)
• 3.3V_TU (Made from 3.3V_Normal L2103).
•
1.26V TU IC2103
(Made from 3 3V TU)
BCM
IC101
Video
Processor
• 3.3V_ST (Direct from SMPS through L503).
• 2.5V_BCM52230 (IC504)
• D1.5V_DDR (IC508 )
• 0.9V_CORE (IC501)
1.26V
_
TU
IC2103
(Made
from
3
.
3V
_
TU)
.
HDMI SELECTOR VOLTAGES (IC701)
AUDIO IC1702
• 3.3V_AU_AVDD (Made from 3.3V_Normal).
• 3.3V_DVDD (Made from 3.3V_Normal).
• 1.8V (Made from 3.3V_Normal).
Frame Rate Converter (IC5201) FRC
• 1.26V_FRC (IC5401) 3.3V_FRC (IC5402),
1.5V_FRC (IC5403)
July 2011 LCD TV 55LW56000
65
• 3.3V_HDMI
(From 3.3V_Normal through L701)
• 24V (Direct from SMPS through L504).