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Circuit Descriptions
7.
7.
Circuit Descriptions
Index of this chapter:
7.1 Introduction
7.2 Power Supply
7.3 DC-DC Converter
7.4 Front-End
7.5 HDMI
7.6 Video and Audio Processing - PNX8543
7.7 Common Interface CI+
Notes:
•
Only
new
circuits (circuits that are not published recently)
are described.
•
Figures can deviate slightly from the actual situation, due
to different set executions.
•
For a good understanding of the following circuit
descriptions, please use the wiring, block (see chapter
) and circuit diagrams (see chapter
10. Circuit Diagrams and PWB Layouts
you will find a separate drawing for clarification.
7.1
Introduction
The Q543.1E LA chassis (platform name TV543/32) is a
derivative from the Q543.3E LA chassis.
Main difference with the previous chassis is the absence of the
Timing Controller (TCON) on the SSB; it comes together with
the LCD Panel instead.
7.1.1
Implementation
Key components of this chassis are:
•
PNX8543 Digital Colour Decoder
•
HD1816AF Hybrid Tuner
•
DRX3926K Demodulator
•
TDA9996 HDMI Switch
•
TPA3123D2PWP Class D Power Amplifier.
7.1.2
TV543 Architecture Overview
•
For details about the chassis block diagrams refer to
chapter
. An overview of the TV543
architecture can be found in
Figure 7-1 Architecture of TV543/32 platform
1
8
540_200_090
3
27.ep
s
090
3
27
Option
a
l for
Q54
8
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ass
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