Circuit Descriptions
7.
7.
Circuit Descriptions
Index of this chapter:
7.1 Introduction
7.2 Power Architecture
7.3 MT8222 Video/Audio processor
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 RAM1.0A LA chassis is using the MT8222 video and audio
processor.
7.1.1
Implementation
Key components of this chassis are:
•
MT8222 scaler
•
HFT-8/125H (China/AP)/HFT-8-13F2 (Argentina) tuner
•
K3953M/K9362M (China/AP)/
M3953M/M9370M (Argentina) saw filter
•
TDA9885TS IF demultiplexer
•
TPA3101D2 audio amplifier
•
TL2428MC T-CON IC
7.1.2
RAM1.0A LA Architecture Overview
•
For details about the chassis diagrams refer to
chapter 10. Circuit Diagrams and PWB Layouts. An
overview of the RAM1.0A LA architecture can be
found in
Figure 7-1 Architecture of RAM1.0A LA
1
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T C O N
TL242
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2
K E Y P A D
I.R. RE C E IV E R
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HEF4052
