Circuit Descriptions, Abbreviation List, and IC Data Sheets
8
9.
9.
Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Main Supply
9.3 On-Board Platform Supply
9.4 On-board DC/DC Converters
9.5 Front-End
9.6 PNX85xx
9.7 Back-end
9.8 Ambient Light, Spartan-3
9.9 DLNA
9.10 Abbreviation List
9.11 IC Data Sheets
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 (chapter 6) and
circuit diagrams (chapter 7). Where necessary, you will find
a separate drawing for clarification.
9.1
Introduction
This chassis (member of the “TV522/92” platform) is a
derivative from the Q528.1E LA chassis (member of the
“TV520” platform). It comes with a two new stylings called
“ME8” for sets from the xxPFL7xxx series and “VE8” for sets
from the xxPFL9xxx series. In some sets, a light strip is
incorporated on the front side of the set referred to as “Light
Guide”. This generates a diffuse light through a light pipe.
The platform incorporates an improved (faster tuning, better
phase noise performance, etc.) tuner block with separate
support for DVB-C and DVB-T.
It’s built around the PNX85xx “System on Chip” (SoC), which
handles the video and audio processing, while the PNX51xx
takes care of the video back-end processing. The Spartan-3
FPGA is used to process the data for the Pixelated AmbiLight
units and can run the two, three and four sided AmbiLight
versions.
9.1.1
Features
The main features for this chassis are:
•
1080p resolution @ 100 Hz (in some sets).
•
High performance back-end processing Perfect Pixel HD
engine capable of 300 Mpixels/sec. With this technology,
each pixel of the incoming picture is enhanced to better
match the surrounding pixels, resulting in a more natural
picture. Artifacts and noise in all sources from multimedia
to standard TV to highly-compressed high-definition (HD)
are detected and reduced. This results in a clean and razor
sharp image.
•
ClearLCD, a technology that uses scanning and back light
dimming technology to reduce the motion blur on an LCD
screen, caused by the slow response time and the “sample
and hold” characteristic of LCD.
•
The introduction of a module referred to as “Light Guide” on
the front side of the set (in some sets).
•
The introduction Pixelated LED AmbiLight (in some sets).
•
Improved tuner compared to Q528.1E LA chassis
•
Support of DVB-C reception (in some sets).
•
For all other features: refer to the Q528.1E LA/LB Service
Manual.
9.1.2
TV522/92 Architecture Overview
For details about the chassis block diagrams refer to chapter
“Block diagrams, Test Point Overview, and Waveforms”. An
overview of the TV522/92 architecture can be found in next
figure “Architecture of TV522/92 platform”.
Sets with all resolutions @ 50 Hz use the PNX85xx SoC and
the PNX5100 Video Back-end Processor for video processing.
With the same configuration, a resolution of 1366
×
768p @
100 Hz, or even 1920
×
1080p @ 100 Hz can be achieved.
