Philips MG8 Service Manual page 102

EN 102 9. Q522.2E LA
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Power Supply
9.3 Abbreviation List
9.4 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 Q522.2E LA chassis (platform TV522/22E) is a derivative
from the Q522.1E LA chassis (platform TV522/22M), which on
its turn is derivative from the Q528.2E (platform TV522/82M).
They are the successors of the BJ3.1 chassis.
This Q522.2E LA chassis is built around one Small Signal
Board and some additional boards:
• Local Keyboard panel.
• IR/LED panel.
• Power Supply Unit.
TV522/22E - Architecture Block Diagram
HDMI Side
ADI8191
HDMI 1
HDMI
HDMI 2
switch
HDMI 3
Hybrid
Tuner
Circuit Descriptions, Abbreviation List, and IC Data Sheets
NXP
PNX8541
Digital Colour
MASTER
Decoder
IF
8-bit video
TDA10048 2-field HD MADI
DVB-T
MPEG2
CI
Figure 9-1 Architecture of TV522/22E platform
For a description of all circuitry except the PSU, please refer to
the Q528.1E LA Service Manual.
9.1.1 Implementation
Details of the implementation are as follows:
• Removed items:
–
–
–
–
–
–
–
• Replaced items:
–
–
9.1.2 TV522 Architecture Overview
For details about the chassis block diagrams refer to chapter
"Block diagrams, Test Point Overview, and Waveforms". An
overview of the TV522 architecture can be found in next figure
"Architecture of TV522 platform".
DDR-II
64MB
FLASH
HP
amp
Class D
TDA8932T
MPEG4.
PNX5050.
PACIFIC3.
DVB-C.
RS232 level shifter on UART.
I2C Mux (PCA9540).
TS buffering.
PNX8541 E1 package with 1mm pitch package.
Tantalum cap by SMD Elcap.
LVDS DUAL
LVDS
BU7988K
PCI/XIO
USB2.0
Matrix
HD@50Hz
I_18010_078.eps
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