MAIN BOARD SECTIONMAIN BOARD SECTION
The following section gives detailed information about the Main board. This board contains the
Microprocessor Audio section video section and all
It also receives all input signals
,
,
.
and processes them to be delivered to the Control board via the LVDS cable.
The (VSB, 8VSB and QAM) Silicon tuner is located on the Main board. The Main board is also
where the television’s software upgrades are accomplished through the USB port.
This board has no mechanical adjustments.
The Main Board Receives its operational voltage from the SMPS:
• STBY 5V (3.4V in STBY and 5.1V during run).
-
DURING RUN FROM THE SMPS (STBY 5V remains):
• +5V for Video processing
• 17V for Audio amplification
• Distributes Key_CTL_0 and Key_CTL_1 to the Front IR Board for Front Key Pad
detection.
• Receives Intelligent Sensor data from the Front IR/Key Board (via SCL/SDA).
• Drives front Power LEDs.
• Distributes +3.3V_ST and 5V_MST to the Front IR Board.
May 2011 50PV450 Plasma
135
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