Circuit Descriptions
EN 53
Q552.2L LA
7.
2012-Mar-16
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div. table
7.
Circuit Descriptions
Index of this chapter:
7.1 Introduction
7.2 Power Supply
7.3 DC/DC Converters
7.4 Front-End Analogue and DVB-T, DVB-C; ISDB-T reception
7.5 Front-End DVB-S(2) reception
7.6 HDMI
7.7 Video and Audio Processing - PNX855xx
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
9. Block Diagrams
) and circuit diagrams (see chapter
10. Circuit Diagrams and PWB Layouts
).Where necessary,
you will find a separate drawing for clarification.
7.1
Introduction
The Q552.2L LA is part of the TV550 platform and uses the
(same) PNX855xx chipset.
The major deltas versus its predecessor Q551 are:
•
support of DVB-T2 (“second generation” DVBT)
•
implementation of “passive” 3D
•
removal of TCON from the SSB (comes with the display)
•
changed power architecture
•
new USB hub (where applicable).
The Q552.2L LA chassis comes with the following stylings:
•
Berlinale (series xxPFL58xx),
•
Blockbuster (series xxPFL66xx),
•
Emmy (series xxPFL76xx),
•
Sundance (series xxPFL86xx).
7.1.1
Implementation
Key components of this chassis are:
•
PNX855xx System-On-Chip (SOC) TV Processor
•
TX26xx Hybrid Tuner (DVB-T/C, analogue)
•
STV6110AT DVB-S Satellite Tuner
•
SII9x87 HDMI Switch
•
TPA312xD2PWP Class D Power Amplifier
•
LAN8710 Dual Port Gigabit Ethernet media access
controller.
7.1.2
TV550 Architecture Overview
For details about the chassis block diagrams refer to
chapter 9.
Block Diagrams
. An overview of the TV550 2011 architecture
can be found in
Figure 7-1
.
Figure 7-1 Architecture of TV550 platform 2011
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