Philips DVDR3305/02, Руководство по обслуживанию, Страница: 48 / 73

EN 48 3139 785 3093x 8. Circuit- and IC Description
8.2.4. Tuner Frontend [1100 : TMQZ2]
It has a RF IN for antenna connection and RF OUT which
provides a RF loop through for connection to the TV.
The Frontend ( Tuner & IF-demodulator ) is controlled by I
2
C
(SCL_5V- and SDA_5V-) lines coming from the Domino Host
on the Digital board.
Complete video processing is done in this unit and the video
output (CVBS) is taken out from the [VID_OUT] pin via a
transistor as CVBS_TV-line to the Video I/O circuitry. The
audio-IF component SIF1 is taken out from the [SIFOUT] pin
for the demodulation by the Multi-sound processor (MSP).
Audio demodulator
The sound demodulation is done by the MSP3415 [7500],
which is also fully controlled via I
2
C bus by the Domino Host.
The audio signals are available at pin 26 and pin 27 and fed
as AFER- & AFEL- line to the audio I/O for further processing.