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EN 36
7.
PB52.3HU LA
7. Circuit Descriptions
Index of this chapter:
7.1 Introduction
7.2 Main Supply
Notes:
•
Only new circuits (circuits that are not published recently)
are described. For a description of most circuitry, refer to
the Q528.1E LA Service Manual.
•
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.
7.1
Introduction
This chassis (member of the "TV522" platform) is a derivative
from the PB52.1HU LA chassis with the same Pro:Idiom
technology and iBoard functionality. It comes with the ME7
styling for the 26" and the PnS styling for all other sets.
7.1.1
Features
The main features for this chassis are:
•
The introduction of a module referred to as "Light Guide" on
the front side of the set (in some sets).
•
Support of DVB-C reception (in some sets).
HDMI 1(rear)
HDMI 2(rear)
HDMI 3(MPEG4)
Hybrid Tuner
Saw
Decoder
TDA10060
DDR1
64MB
32
STi7101
MPEG4 HD
FLASH
2009-Oct-09
Circuit Descriptions
PB Micro
UPSD3333D
ADI8191
HDMI
switch
Master IF
Pro:Idiom
LGDT1128
CVBS
TS
SAA7113
encoder
8
Figure 7-1 Architecture of PB522 platform
•
For hospitality TV this chassis is provided with Pro:Idiom
technology.
•
For all other features: refer to the Q528.1E LA/LB and
PB52.1HU LA/LB Service Manual.
7.1.2
Service Attention Points
•
One SSB version is to be used in different sets. So if a SSB
is installed in a TV-set, the technician has to make sure the
options are set correctly. Section
describes the way to do a board exchange.
•
The ComPair connection to the set for this platform is made
to a headphone jack on the back of the sets which carries
a RS232 level connection to communicate. For this, the in
chapter 5 paragraph "ComPair" mentioned RS232 cable is
needed.
•
The repair workshop repairing the SSBs on component
level must load the latest set and NVM software in the SSB
before sending the boards back in the pool. This to make
®
sure that the board is working in a proper way when it is
mounted in a "to repair" set.
•
In the CSM menu, the 12nc of the display will be
mentioned.
7.1.3
PB522 Architecture Overview
For details about the chassis block diagrams refer to chapter
"Block diagrams, Test Point Overview, and Waveforms". An
overview of the PB522 architecture can be found in
DDR-II
EPROM
64MB
32
YUV20
EP2C8
ALT00
FPGA
NXP
PNX8541
BR/Pend
5.9.5 SSB Replacement
32
Matrix
RGB30
HD@60Hz
Pac3
FHD@60H
z
AmbiLight 2
PCI/XIO
FLASH
USB2.0
64MB
Discreet
amp
®
Figure
7-1.
I_17500_001.eps
030408
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