Circuit Descriptions, Abbreviation List, And Ic Data Sheets - Philips 32PFL3403D/85 Service Manual

Circuit Descriptions, Abbreviation List, and IC Data Sheets

9. Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 LCD Power Supply
9.3 DC/DC converters
9.4 Front-End
9.5 Video Processing
9.6 Audio Processing
9.7 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 LC8.1U chassis (development name "LC08SP") is a newly
developed platform using a "Mediatek" chipset. It covers
screen sizes of 32" upto 52" with a new styling called "ME8"
and "MG8". The MG8 is like the ME8 styling, however instead
of a transparent flare, it has a in-mould color flare. Also the
speakers are front firing as i.o. back-firing, and it comes w/o
tweeters. The back cover construction is 95% same as ME8.
Tuner
Alps TDQU
SAW Filter
DDR2
DDR2
Flash
NVM
Digital IF
MT5382
VIF
TDA9886
SIF
AV1 (YPbPr + LR)
AV2 (YPbPr + LR)
AV3 (CVBS/YC + LR)
PC LR
SPDIF Output
SideAV (CVBS/YC + LR)
Headphone Output
UART (via Headphone)
HDMI1
HDMI2
HDMI3 MUX
HDMI4
uP
USB
Figure 9-1 Architecture of LC08SP
Some key components are:
• Main processor (MT5382): audio/video processing.
• Motion estimation/compensation engine (MT8280) (in
some sets).
2
• FPGA; I C output to AmbiLight modules (in some sets).
• HDMI demultiplexer (SIL9185) for driving 4 HDMI
connectors.
• Standby controller (WT61P7) for overall power
management.
• Analog IF-PLL demodulator (TDA9886).
• Audio class-D amplifier (TDA8932).
9.1.1 Features
• Hybrid NTSC/ATSC tuner.
• 3+1 HDMI v1.3, supporting CEC.
• USB 2.0.
• Digital Natural Motion (DNM) (in some sets).
• Double Frame Rate (120 Hz) (in some sets).
• 2-sided AmbiLight (in some sets).
• PSU directly drives the backlight units (no inverters
needed).
9.1.2 LC08SP Architecture Overview
For details of the chassis block diagrams refer to chapter
"Block diagrams, Test Point Overview, and Waveforms". An
overview of the LC08SP architecture can be found below.
DDR2
DDR2
JTAG
Front
PSU2
HP
Amp OPTIONAL
AMBI
JTAG
Audio Amp
NCP5422
TDA8932
PSU1
12V
NCP5422
Speaker
LC8.1U LA 9.
Flash
LVDS3
Output up to
Quad LVDS
1920x1080p
MT8280 100/120Hz
LVDS2
Output up to
Dual LVDS
1920x1080p
50/60Hz
LVDS1
Flash
Ambi FPGA
EP2C5
+5V_SW
+3V3_SW BD25KA5FP
+1V8_SW TPS74801
+1V1_SW
L78M05CDT
H_17740_046.eps
EN 79
Or
+2V5
+1V2
+5Vtuner
240108