Philips Q552.1A - Circuit Descriptions; Introduction

Circuit Descriptions
EN 44 Q552.1A LA7.
2010-Jun-25
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7. Circuit Descriptions
Index of this chapter:
7.1 Introduction
7.2 Power Architecture
7.3 DC/DC Converters
7.4 Front-End Analogue and DVB-T, DVB-C; ISDB-T reception
7.5 HDMI
7.6 Video and Audio Processing - PNX85500
7.7 Back-End
7.8 Ambilight
7.9 TCON
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 Q552.1A LA chassis is part of the TV550 platform and
comes with the following stylings: “Da Vinci” (series
xxPFL6xxx) and “Matisse” (series xxPFL8xx). The TV550
platform is the successor of the TV543 platform.
7.1.1 Implementation
Key components of this chassis are:
• PNX85500 System-On-Chip (SOC) TV Processor
• TX31XX Hybrid Tuner (DVB-T/C, analogue)
• 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 architecture can be
found in Figure 7-1
.
Figure 7-1 Architecture of TV550 platform - TCON integrated in display (xxPFL8xxx)
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