Philips LX8200SA - AVC Board; Brief Introduction to the AVC Board

Brief introduction of the AVC (Audio, Video and Control) BOARD
The AVC Board consists of the Microprocessor of the set, eeprom, RDS decoder, backlight control, video buffer and the following:
a. IC CS4362
A 6 channel DAC IC CS4362 which interfaces with the DVD module. It accepts PCM data at sample rates from 4kHz to 192
kHz and DSD audio data. It has 6 differential outputs. The outputs are fed into opm amplifiers for equlization and conversion
into single end outputs.
b.
IC TDA7468D
IC TDA7468D which includes functions such as source selection, sound control, volume control and muting function. Sound
features such as DSC and IS are controllable via I
2
C Bus from the microprocessor. The IC caters for 4 input sources, namely
TUNER, DVD, TV IN and MUX IN.
MUX IN is further multiplexed between AUX IN and DIGITAL IN by IC HEF4053BT. Input networks are included to provide
appropriate attenuation for various sources.
c. SCART OUTPUT
Scart output for audio/video connection to TV (Not in all versions).
d.
LINE OUT
Line out with cinch socket for connection to external amplifier.
e.
CENTER OUT
Center out with cinch socket for connection to active center speaker.
f.
SUBWOOFER OUTPUT
Subwoofer output with cinch socket for connection to active subwoofer speaker.
g.
HEADPHONE AMPLIFIER
Headphone amplifier to drive 32 ohm to 1kohm headphone.
The Headphone socket is not situated in this AVC Board but in the Key & Control Board.
h. DIGITAL OUT
Digital out with cinch socket for connection to Digital in of other audio equipment.
i.
DIGITAL IN
Digital in with cinch socket for connection to Digital out of other audio equipment.
j.
YUV OUT
YUV out with cinch socket for connection to TV (Not in all versions).
AVC BOARD
TABLE OF CONTENTS
Brief Introduction ........................................................... 10-1
Top View Layout ............................................................ 10-2
Top View Layout (Mapping) ........................................... 10-3
Top View Layout (Portion A) .......................................... 10-4
Top View Layout (Portion B) .......................................... 10-5
Top View Layout (Portion C) .......................................... 10-6
Top View Layout (Portion D) .......................................... 10-7
Bottom View Layout ....................................................... 10-8
Circuit Diagram (Part 1) ................................................. 10-9
Circuit Diagram (Part 2) ............................................... 10-10
Circuit Diagram (Part 3) ............................................... 10-11
Circuit Diagram (Part 4) ............................................... 10-12
Circuit Diagram (Part 5) ............................................... 10-13
Circuit Diagram (Part 6) ............................................... 10-14
Circuit Diagram (Part 7) ............................................... 10-15
Electrical parts list........................................................ 10-16
10-1 10-1