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Circuit Descriptions, Abbreviation List, and IC Data Sheets

EN 76 LC4.9A AA9.

9. Circuit Descriptions, Abbreviation List, and IC Data Sheets

Index of this chapter:

9.1 Introduction

9.2 Block Diagram

9.3 Input/Output

9.4 Tuner and IF

9.5 Video: TV Part (Diagrams B1, B2, and B3)

9.6 Columbus

9.7 Video: Scaler Part (Diagram B7, B8 and B9)

9.8 Audio Processing

9.9 Control

9.10 Abbreviation List

9.11 IC Data Sheets

9.1 Introduction

The “LC4.9 Plasma TV” is a global plasma TV for the year

2005. It is the successor of the “LC4.7” and has a screen size

of 42 inch or 50 inch (in 16:9 ratio). It has a new styling, called

Entry+ 05. Globally, there are three different picture qualities

available, depending on the model: Pixel Plus (used in the

models discussed in this manual), Digital Crystal Clear, and

Crystal Clear. The block diagram below (Figure “Block

diagram”) shows the Pixel Plus architecture; the architectures

of the other models are shown in the block diagram on the next

page (Figure “Block diagram of the internal building blocks”).

The architecture consists of a TV and Scaler panel, an EPLD

(only in the Pixel Plus model), an I/O panel, a Side I/O and

Local Keyboard panel and a Power Supply panel.

The functions for video/audio processing, microprocessor (µP),

and CC/Teletext (TXT) decoder are all combined in one IC

(TDA150xx, item 7217), the so-called third generation Ultimate

One Chip (UOC-III) or “Hercules”. This chip has the following

features:

• Control, small signal, mono/stereo, and extensive Audio/

Video switching in one IC.

• Upgrade with digital sound & video processing.

• Alignment free IF, including SECAM-L/L1 and AM.

• FM sound 4.5/5.5/6.0/6.5, no traps/bandpass filters.

• Full multi-standard colour decoder.

• One Xtal reference for all functions (microprocessor, RCP,

TXT/CC, RDS, colour decoder, and stereo sound

processor).

9.2 Block Diagram

Figure 9-1 Block Diagram

The PLL tuner UV1316E/1318SD/TEDE9 delivers the IF-

signal, via audio & video SAW-filters, to the Video Signal

Processor and FLASH embedded TEXT/Control/Graphics

Micro Controller TDA120x1 (item 7011, also called Hercules).

This IC has the following functions:

• Analogue Video Processing

• Sound Demodulation

• Audio Interfaces and switching

• Volume and tone control for loudspeakers

• Reflection and delay for loudspeaker channels

• Micro Controller

• Data Capture

• Display

The Hercules has one input for the internal CVBS signal and a

video switch with 3 external CVBS inputs and a CVBS output.

All CVBS inputs can be used as Y-input for Y/C signals.

However, only 2 Y/C sources can be selected because the

circuit has 2 chroma inputs. It is possible to add an additional

CVBS(Y)/C input (CVBS/YX and CX) when the YUV interface

and the RGB/YPRPB input are not needed. There are two rear

analogue video inputs: AV is for SVHS in and video (CVBS) in,

and CVI-1 is meant for RGB/YUV in). The rear VIDEO OUT

cinch connector can be used for monitoring purposes:

WYSIWYR (What you see is what you record).

Depending on the model of the TV set, the Hercules delivers its

RGB signals either directly to the Scaler IC or indirectly, via a

Columbus chip (for 2D/3D comb filtering and spatial/temporal

noise reduction, for its description: see further down in this

text). The EPLD, which is present in the Pixel Plus models

discussed in this manual, provides additional sharpening to the

picture. For a general outline, see the table and the block

diagrams below, in which the architectures of the various

models are given, together with their electronic building blocks.

TUNER

CVBS

CVBS,U,V

A/D

AD9945

COLUM-

BUS

SCALER

LVDSRx

SDRAM

HDMI

NVM

FLASH

DDR

LCD

PANEL

601 INTERF. 601 INTERF.

DVI TMDS

601 INTERFACE

HERCULES

INTERNAL LIP SYNC CKT

SM5301

DVI-IHDMIDMMIHP

NVM

AUDIO

AMPLIFIER

ComPair

SCART/

CINCH

I/O

AUDIO

AMP

EPLD

LVDSRx

F_15270_007.eps

200505

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