Brief Introduction Of The Av Board - Philips LX8300SA Service Manual

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AV BOARD
TABLE OF CONTENTS
Brief Introduction of the AV Board ................................... 7-1
Top View Layout .............................................................. 7-2
Bottom View Layout ......................................................... 7-3
Circuit Diagram (Part 1) ................................................... 7-4
Circuit Diagram (Part 2) ................................................... 7-5
Circuit Diagram (Part 3) ................................................... 7-6
Circuit Diagram (Part 4) ................................................... 7-7
Circuit Diagram (Part 5) ................................................... 7-8
Circuit Diagram (Part 6) ................................................... 7-9
Electrical parts list .......................................................... 7-10

BRIEF INTRODUCTION OF THE AV BOARD

The AV Board consists of the following features :
a. IC CS42418
IC CS42418 acts as both DAC and ADC. It accepts PCM data at sample rate from 4kHz to 192kHz audio data. The analog
output is then fed into the Op-Amps which are used to filter and amplify the 6-channel signals before passing them onto the
Power-Amp module.
There are eight 24 bit DAC within this chip, 6 of those are dedicated to the 6-channel output, the other 2 are used for LINE
OUT signal.
This chip has 24 bit ADC. The internal stereo ADC is capable of independent gain control for single ended or differential
analog input. The digital output line ADC_SDOUT is then passed on to the MTK of the SD6.3 module. CS42418 is controlled
by the SD6.3 module via the I 2 C bus.
b. IC HEF4052BT
The selection of TUNER, TV INPUT, AUX INPUT is made by IC HEF4052BT which acts as a multiplexer.
c. Video signals are buffered (not for all versions) before connecting to the TV.
d. YUV OUT
YUV OUT with cinch socket for connection to TV. Progressive Y Pb Pr is selected through RC.
e. LINE OUT
LINE OUT with cinch socket for connection to external amplifier.
f. SCART
SCART output for audio/video connection to TV (not for all versions).
g. S-Video and CVBS
S-Video and CVBS are used for video connection to the TV.
h. DIGITAL IN
DIGITAL IN with cinch socket for connection to DIGITAL OUT of other audio equipments.
The Digital_in source is fed to the SD6.3 module for audio decoding.
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