Philips LX3950W/01, Service Manual

Page: 19 / 79

BRIEF INTRODUCTION OF THE AV BOARD
The AV Board consists of the following features :
a. IC CS42418
IC CS42418 which includes functions such as ADC and DAC, sound control, volume control and muting function.
Sound features such as DSC are controllable via I
2
C Bus from the SD6.1 module.
The IC caters for 2 channels analog input via a 4 stereo channels MUX HEF4052BT.
The MUX multiplexed between Aux In, TV In, Tuner and Mic In.
Input networks are included to provide appropriate attenuation for various sources.
b. SCART (for /01 and /05 versions only)
SCART input/output for audo/video (output only) connection to TV.
c. LINE OUT
Line out with cinch socket for connection to external amplifier.
d. TV IN
TV In cinch socket for connection to external TV input.
e. Y/Pb/Pr (not for /01 and /05 versions)
Y/Pb/Pr component video output with cinch socket for connection to TV.
Progressive Y/Pb/Pr is selected through RC.
f. IC M62320FP
IC M62320FP which served as additional I/O port.
g. DIGITAL IN
Digital In with cinch socket for connection to Digital Out of other audio equipments.
The Digital In source is fed to the SD6.1 module for audio decoding.
AV BOARD
TABLE OF CONTENTS
Brief Introduction of the AV Board ................................... 7-1
Top View Layout .............................................................. 7-2
Top & Bottom View Layout (Mapping) ............................. 7-3
Bottom View Layout ......................................................... 7-4
Circuit Diagram (Part 1) ................................................... 7-5
Circuit Diagram (Part 2) ................................................... 7-6
Circuit Diagram (Part 3) ................................................... 7-7
Circuit Diagram (Part 4) ................................................... 7-8
Circuit Diagram (Part 5) ................................................... 7-9
Circuit Diagram (Part 6) ................................................. 7-10
Electrical parts list .......................................................... 7-11
7-1 7-1