Circuit Descriptions
Q548.1E LA
7.
EN 39
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 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
Main difference with the previous chassis is the addition of the PNX5120 Video Back-End Processor. Roadrunner sets (8000 series) are equipped with AmbiLight. 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 • PNX5120 Video Back-End Processor.
7.1.2
TV543 Architecture Overview •
For details about the chassis block diagrams refer to chapter 9. Block Diagrams. An overview of the TV543 architecture can be found in Figure 7-1.
The Q548.1E LA chassis (platform name TV543/82) is a derivative from the Q543.1E LA chassis.
Optional for Q548 chassis
18540_200_090327.eps 090402
Figure 7-1 Architecture of TV543/82 platform
2009-Apr-03