LG 42PW350 - MAIN BOARD SECTION; Main Board Overview; Main Board Operational Voltages

MAIN BOARD SECTION
The following section gives detailed information about the Main board. This board contains the
Microprocessor, Audio section, video section and all input, outputs. It also receives all input signals and
Microprocessor,
Audio
section,
video
section
and
all
input,
outputs.
It
also
receives
all
input
signals
and
processes them to be delivered to the Control board via the LVDS cable. The main tuner (Silicon Tuner
using discreet components) which provides VSB (NTSC), 8VSB (Over the Air Digital Broadcast) and QAM
(Cable Digital) is located on the main board. This board is also where the television’s software upgrades
are accomplished through the USB input.
This board has no mechanical adjustments
This
board
has
no
mechanical
adjustments
.
The Main Board Receives its operational voltage from the SMPS:
STBY 5V
DURING STAND-BY: From SMPS
DURING RUN From SMPS : (STBY 5V remains):
•
STBY
5V
• +5V for Video processing
• 17V for Audio
OUTPUTS:
• Sends power supply turn on commands to the SMPS.
• Distributes Key 1 and Key 2 to the Front IR/Key Pad Board.
• Receives Intelligent Sensor data from the Front IR/Key Pad Board (via SCL/SDA).
• Controls the front Power LEDs.
•
Distributes +
33V ST
to the Front IR Board
•
Distributes
+
3
.
3V
_
ST
to
the
Front
IR
Board
.
• Routes 20 bit LVDS video and Panel Turn On signals to the Control Board.
• Processes and Outputs all audio signals and sends them to the Invisible Speakers
• Routes Optical Audio Out.
• Receives and Transmits to the Motion Remote via RF.
•
Transmits 3D Sync to the 3D Shutter Glasses
June 2011 42PW350 Plasma
139
•
Transmits
3D
Sync
to
the
3D
Shutter
Glasses
.