Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 110 LC4.31E AA9.
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Block Diagram
9.3 Power Supply Unit
9.4 Abbreviation List
9.5 IC Data Sheets
9.1 Introduction
The LC4.31 chassis is a global chassis for the year 2006. It is
the successor of the LC4.3 chassis and covers screen sizes of
26, 32, 37 and 42 inch (in 16:9 ratio). It has three stylings,
called ME5FL, ME6 and Entry. There are two different picture
qualities available, depending on the model: Pixel Plus in the
xxPF7321/10 and /12 models, and Digital Crystal Clear in the
xxPF5321/10 and /12 models, and in the 42PF5421/10 model.
The block diagram below (Figure “Block diagram”) shows the
Pixel Plus architecture; the architectures of the Digital Crystal
Clear models are shown in the block diagram on the next
Figure “Block diagram of the internal building blocks“.
The architecture consists of a TV and Scaler panel, I/O panel,
Side I/O and Local Keyboard panel and Power Supply panel.
The functions for video/audio processing, microprocessor (P),
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).
Important notice:
This information only applies to the following model numbers:
• 26PF5321/10
• 26PF5321/12
• 26PF5321F/10
• 32PF5321/10
• 32PF5321/12
From week 613, the Hercules IC has been changed. The new
IC also needs another version of the software. The table below
shows the relation between the IC’s and the software.
Table 9-1 Hercules IC and software versions
Never mix an IC with the software of the other IC.
However, if you need to replace a TDA15031H/N1C91, it can
be substituted with a TDA15021H/N1C91. But in that case,
make sure you replace the software as well.
9.2 Block Diagram
Figure 9-1 Block Diagram
The function is basically the same as in the LC4.3E AA, with the
following differences:
• the model range only contains models with Digital Crystal
Clear or Pixel Plus;
• Pixel Plus is performed by a new IC, called Pacific 3.
The Pacific 3 IC, which is present in Pixel Plus models,
provides additional sharpening, and contrast and colour
enhancements to the picture. For a general outline, see the
table and the block diagrams below, in which the architectures
of the two different models are given, together with their
electronic building blocks.
Table 9-2 Models and picture quality
Manufact.
date
IC version
Dedicated soft-
ware version
Upto week 613
TDA15031H/N1C91
(12NC: 9352 802 15557)
HSD21E1_1.xx
From week 613
TDA15021H/N1C91
(12NC: 9352 803 66557)
HSD21E1_2.xx
TUNER
IF
CVBS
CVBS,U,V
A/D
AD9945
COLUM-
BUS
SCALER
LVDSRx
SDRAM
HDMI
NVM
FLASH
DDR
LCD
PA NE L
601 INTERF. 601 INTERF.
DVI TMDS
601 INTERFACE
Y
C
HERCULES
INTERNAL LIP SYNC CKT
SM5301
DVI-IHDMIDMMIHP
NVM
AUDIO
AMPLIFIER
ComPair
SCART/
CINCH
I/O
TO
AUDIO
AMP
PACIFIC 3
LVDSRx
G_16210_093.eps
200106
Model Picture quality
xxPF5321/10/12 & 42PF5421/10 Digital Crystal Clear
xxPF7321/10/12 Pixel Plus
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