Philips 19PFL5522D - Circuit Descriptions, Abbreviation List, and IC Data Sheets

Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 79LC7.2E LB 9.
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Main Supply
9.3 DC/DC converters
9.4 Front-End
9.5 DVB-T Signal Processing
9.6 Video Processing
9.7 Memory addressing
9.8 Audio Processing
9.9 HDMI
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
The LC7.x (development name “LC07”) is a new global chassis
for the year 2007 (LC7.1 is the analogue range, LC7.2 is the
digital range). It is the successor of the LC4.x chassis. The
LC7.xx LB covers a screen size of 19 to 23 inch with a new
styling called “BELT”. Some key components are:
• Audio: Sound processing is performed by a multi-standard
sound processor MSP4450 (item 7411)
• Video: Video processing is performed by the Trident video
processor SVP CV32-LF (item 7202).
For analogue reception, a standard IF demodulator is used,
whereas digital input signals (DVB-T) are processed through a
COFDM channel decoder together with an MPEG decoder
(integrated on the SSB). A so-called “Reneas” microprocessor
performs the control functionality.
9.1.1 SSB Cell Layout
Description of the functional blocks (top side):
• In the middle, there is the Trident video processor.
• Above it, there is the Reneas micro processor.
• At the right hand top, there is the audio class D amplifier.
• The left part of the SSB contains the digital reception
circuit. In the LC4.x, this was a separate module, here it is
integrated on the SSB (same MOJO chipset).
• Between the digital reception part and the Trident part,
there is the DC/DC conversion circuit.
Figure 9-1 SSB top view
Description of the functional blocks (bottom side):
• The “Flash Mem” chip contains the software of the TV.
• The “Micronas” is the audio demodulator/processor.
• The two SDRAM’s are used for the video processing.
• The right part of the SSB contains the digital reception
circuit. This side contains the channel decoder.
• There are two connectors for ComPair:
– One on the other side of the tuner for I2C
communication with the Reneas micro processor.
– The other one at the digital reception part, for UART
communication with the MOJO.
G_16860_048.eps
310107
DC-DC CONVERSION
TRIDENT
VIDEO
PROC.
RENEAS
uP
AUDIO CLASS D
COMMON INTERFACE
HYBRID TUNER
PCMCIA
CONTROLLER
MOJO
SDRAM
FLASH
MEM
IF DEM
HDMI
VIF SAW
SIF SAW